Commit graph

448 commits

Author SHA1 Message Date
Davies Liu c1b0cbd762 [SPARK-8185] [SPARK-8188] [SPARK-8191] [SQL] function datediff, to_utc_timestamp, from_utc_timestamp
This PR is based on #7643 , thanks to adrian-wang

Author: Davies Liu <davies@databricks.com>
Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #7847 from davies/datediff and squashes the following commits:

74333d7 [Davies Liu] fix bug
22d8a8c [Davies Liu] optimize
85cdd21 [Davies Liu] remove unnecessary tests
241d90c [Davies Liu] Merge branch 'master' of github.com:apache/spark into datediff
e9dc0f5 [Davies Liu] fix datediff/to_utc_timestamp/from_utc_timestamp
c360447 [Daoyuan Wang] function datediff, to_utc_timestamp, from_utc_timestamp (commits merged)
2015-08-01 21:46:46 -07:00
HuJiayin 00cd92f32f [SPARK-8269] [SQL] string function: initcap
This PR is based on #7208 , thanks to HuJiayin

Closes #7208

Author: HuJiayin <jiayin.hu@intel.com>
Author: Davies Liu <davies@databricks.com>

Closes #7850 from davies/initcap and squashes the following commits:

54472e9 [Davies Liu] fix python test
17ffe51 [Davies Liu] Merge branch 'master' of github.com:apache/spark into initcap
ca46390 [Davies Liu] Merge branch 'master' of github.com:apache/spark into initcap
3a906e4 [Davies Liu] implement title case in UTF8String
8b2506a [HuJiayin] Update functions.py
2cd43e5 [HuJiayin] fix python style check
b616c0e [HuJiayin] add python api
1f5a0ef [HuJiayin] add codegen
7e0c604 [HuJiayin] Merge branch 'master' of https://github.com/apache/spark into initcap
6a0b958 [HuJiayin] add column
c79482d [HuJiayin] support soundex
7ce416b [HuJiayin] support initcap rebase code
2015-08-01 21:44:57 -07:00
zhichao.li c5166f7a69 [SPARK-8263] [SQL] substr/substring should also support binary type
This is based on #7641, thanks to zhichao-li

Closes #7641

Author: zhichao.li <zhichao.li@intel.com>
Author: Davies Liu <davies@databricks.com>

Closes #7848 from davies/substr and squashes the following commits:

461b709 [Davies Liu] remove bytearry from tests
b45377a [Davies Liu] Merge branch 'master' of github.com:apache/spark into substr
01d795e [zhichao.li] scala style
99aa130 [zhichao.li] add substring to dataframe
4f68bfe [zhichao.li] add binary type support for substring
2015-08-01 08:48:46 -07:00
Cheng Hao cf6c9ca32a [SPARK-8232] [SQL] Add sort_array support
This PR is based on #7581 , just fix the conflict.

Author: Cheng Hao <hao.cheng@intel.com>
Author: Davies Liu <davies@databricks.com>

Closes #7851 from davies/sort_array and squashes the following commits:

a80ef66 [Davies Liu] fix conflict
7cfda65 [Davies Liu] Merge branch 'master' of github.com:apache/spark into sort_array
664c960 [Cheng Hao] update the sort_array by using the ArrayData
276d2d5 [Cheng Hao] add empty line
0edab9c [Cheng Hao] Add asending/descending support for sort_array
80fc0f8 [Cheng Hao] Add type checking
a42b678 [Cheng Hao] Add sort_array support
2015-08-01 08:32:29 -07:00
Davies Liu 60ea7ab4bb Revert "[SPARK-8232] [SQL] Add sort_array support"
This reverts commit 67ad4e21fc.
2015-08-01 00:41:15 -07:00
Wenchen Fan 1d59a4162b [SPARK-9480][SQL] add MapData and cleanup internal row stuff
This PR adds a `MapData` as internal representation of map type in Spark SQL, and provides a default implementation with just 2 `ArrayData`.

After that, we have specialized getters for all internal type, so I removed generic getter in `ArrayData` and added specialized `toArray` for it.
Also did some refactor and cleanup for `InternalRow` and its subclasses.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7799 from cloud-fan/map-data and squashes the following commits:

77d482f [Wenchen Fan] fix python
e8f6682 [Wenchen Fan] skip MapData equality check in HiveInspectorSuite
40cc9db [Wenchen Fan] add toString
6e06ec9 [Wenchen Fan] some more cleanup
a90aca1 [Wenchen Fan] add MapData
2015-08-01 00:17:15 -07:00
Cheng Hao 67ad4e21fc [SPARK-8232] [SQL] Add sort_array support
Add expression `sort_array` support.

Author: Cheng Hao <hao.cheng@intel.com>

This patch had conflicts when merged, resolved by
Committer: Davies Liu <davies.liu@gmail.com>

Closes #7581 from chenghao-intel/sort_array and squashes the following commits:

664c960 [Cheng Hao] update the sort_array by using the ArrayData
276d2d5 [Cheng Hao] add empty line
0edab9c [Cheng Hao] Add asending/descending support for sort_array
80fc0f8 [Cheng Hao] Add type checking
a42b678 [Cheng Hao] Add sort_array support
2015-07-31 23:11:22 -07:00
Liang-Chi Hsieh 3320b0ba26 [SPARK-9415][SQL] Throw AnalysisException when using MapType on Join and Aggregate
JIRA: https://issues.apache.org/jira/browse/SPARK-9415

Following up #7787. We shouldn't use MapType as grouping keys and join keys too.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #7819 from viirya/map_join_groupby and squashes the following commits:

005ee0c [Liang-Chi Hsieh] For comments.
7463398 [Liang-Chi Hsieh] MapType can't be used as join keys, grouping keys.
2015-07-31 22:26:30 -07:00
zhichao.li 6996bd2e81 [SPARK-8264][SQL]add substring_index function
This PR is based on #7533 , thanks to zhichao-li

Closes #7533

Author: zhichao.li <zhichao.li@intel.com>
Author: Davies Liu <davies@databricks.com>

Closes #7843 from davies/str_index and squashes the following commits:

391347b [Davies Liu] add python api
3ce7802 [Davies Liu] fix substringIndex
f2d29a1 [Davies Liu] Merge branch 'master' of github.com:apache/spark into str_index
515519b [zhichao.li] add foldable and remove null checking
9546991 [zhichao.li] scala style
67c253a [zhichao.li] hide some apis and clean code
b19b013 [zhichao.li] add codegen and clean code
ac863e9 [zhichao.li] reduce the calling of numChars
12e108f [zhichao.li] refine unittest
d92951b [zhichao.li] add lastIndexOf
52d7b03 [zhichao.li] add substring_index function
2015-07-31 21:18:01 -07:00
Reynold Xin 03377d2522 [SPARK-9358][SQL] Code generation for UnsafeRow joiner.
This patch creates a code generated unsafe row concatenator that can be used to concatenate/join two UnsafeRows into a single UnsafeRow.

Since it is inherently hard to test these low level stuff, the test suites employ randomized testing heavily in order to guarantee correctness.

Author: Reynold Xin <rxin@databricks.com>

Closes #7821 from rxin/rowconcat and squashes the following commits:

8717f35 [Reynold Xin] Rebase and code review.
72c5d8e [Reynold Xin] Fixed a bug.
a84ed2e [Reynold Xin] Fixed offset.
40c3fb2 [Reynold Xin] Reset random data generator.
f0913aa [Reynold Xin] Test fixes.
6687b6f [Reynold Xin] Updated documentation.
00354b9 [Reynold Xin] Support concat data as well.
e9a4347 [Reynold Xin] Updated.
6269f96 [Reynold Xin] Fixed a bug .
0f89716 [Reynold Xin] [SPARK-9358][SQL][WIP] Code generation for UnsafeRow concat.
2015-07-31 21:09:00 -07:00
Josh Rosen 8cb415a4b9 [SPARK-9451] [SQL] Support entries larger than default page size in BytesToBytesMap & integrate with ShuffleMemoryManager
This patch adds support for entries larger than the default page size in BytesToBytesMap.  These large rows are handled by allocating special overflow pages to hold individual entries.

In addition, this patch integrates BytesToBytesMap with the ShuffleMemoryManager:

- Move BytesToBytesMap from `unsafe` to `core` so that it can import `ShuffleMemoryManager`.
- Before allocating new data pages, ask the ShuffleMemoryManager to reserve the memory:
  - `putNewKey()` now returns a boolean to indicate whether the insert succeeded or failed due to a lack of memory.  The caller can use this value to respond to the memory pressure (e.g. by spilling).
- `UnsafeFixedWidthAggregationMap. getAggregationBuffer()` now returns `null` to signal failure due to a lack of memory.
- Updated all uses of these classes to handle these error conditions.
- Added new tests for allocating large records and for allocations which fail due to memory pressure.
- Extended the `afterAll()` test teardown methods to detect ShuffleMemoryManager leaks.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #7762 from JoshRosen/large-rows and squashes the following commits:

ae7bc56 [Josh Rosen] Fix compilation
82fc657 [Josh Rosen] Merge remote-tracking branch 'origin/master' into large-rows
34ab943 [Josh Rosen] Remove semi
31a525a [Josh Rosen] Integrate BytesToBytesMap with ShuffleMemoryManager.
626b33c [Josh Rosen] Move code to sql/core and spark/core packages so that ShuffleMemoryManager can be integrated
ec4484c [Josh Rosen] Move BytesToBytesMap from unsafe package to core.
642ed69 [Josh Rosen] Rename size to numElements
bea1152 [Josh Rosen] Add basic test.
2cd3570 [Josh Rosen] Remove accidental duplicated code
07ff9ef [Josh Rosen] Basic support for large rows in BytesToBytesMap.
2015-07-31 19:19:27 -07:00
HuJiayin 4d5a6e7b60 [SPARK-8271][SQL]string function: soundex
This PR brings SQL function soundex(), see https://issues.apache.org/jira/browse/HIVE-9738

It's based on #7115 , thanks to HuJiayin

Author: HuJiayin <jiayin.hu@intel.com>
Author: Davies Liu <davies@databricks.com>

Closes #7812 from davies/soundex and squashes the following commits:

fa75941 [Davies Liu] Merge branch 'master' of github.com:apache/spark into soundex
a4bd6d8 [Davies Liu] fix soundex
2538908 [HuJiayin] add codegen soundex
d15d329 [HuJiayin] add back ut
ded1a14 [HuJiayin] Merge branch 'master' of https://github.com/apache/spark
e2dec2c [HuJiayin] support soundex rebase code
2015-07-31 16:05:26 -07:00
Davies Liu 0024da9157 [SQL] address comments for to_date/trunc
This PR address the comments in #7805

cc rxin

Author: Davies Liu <davies@databricks.com>

Closes #7817 from davies/trunc and squashes the following commits:

f729d5f [Davies Liu] rollback
cb7f7832 [Davies Liu] genCode() is protected
31e52ef [Davies Liu] fix style
ed1edc7 [Davies Liu] address comments for #7805
2015-07-31 11:07:34 -07:00
Liang-Chi Hsieh 0244170b66 [SPARK-9152][SQL] Implement code generation for Like and RLike
JIRA: https://issues.apache.org/jira/browse/SPARK-9152

This PR implements code generation for `Like` and `RLike`.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #7561 from viirya/like_rlike_codegen and squashes the following commits:

fe5641b [Liang-Chi Hsieh] Add test for NonFoldableLiteral.
ccd1b43 [Liang-Chi Hsieh] For comments.
0086723 [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into like_rlike_codegen
50df9a8 [Liang-Chi Hsieh] Use nullSafeCodeGen.
8092a68 [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into like_rlike_codegen
696d451 [Liang-Chi Hsieh] Check expression foldable.
48e5536 [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into like_rlike_codegen
aea58e0 [Liang-Chi Hsieh] For comments.
46d946f [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into like_rlike_codegen
a0fb76e [Liang-Chi Hsieh] For comments.
6cffe3c [Liang-Chi Hsieh] For comments.
69f0fb6 [Liang-Chi Hsieh] Add code generation for Like and RLike.
2015-07-30 23:05:58 -07:00
Daoyuan Wang 83670fc9e6 [SPARK-8176] [SPARK-8197] [SQL] function to_date/ trunc
This PR is based on #6988 , thanks to adrian-wang .

This brings two SQL functions: to_date() and trunc().

Closes #6988

Author: Daoyuan Wang <daoyuan.wang@intel.com>
Author: Davies Liu <davies@databricks.com>

Closes #7805 from davies/to_date and squashes the following commits:

2c7beba [Davies Liu] Merge branch 'master' of github.com:apache/spark into to_date
310dd55 [Daoyuan Wang] remove dup test in rebase
980b092 [Daoyuan Wang] resolve rebase conflict
a476c5a [Daoyuan Wang] address comments from davies
d44ea5f [Daoyuan Wang] function to_date, trunc
2015-07-30 19:22:38 -07:00
Davies Liu 0b1a464b6e [SPARK-9425] [SQL] support DecimalType in UnsafeRow
This PR brings the support of DecimalType in UnsafeRow, for precision <= 18, it's settable, otherwise it's not settable.

Author: Davies Liu <davies@databricks.com>

Closes #7758 from davies/unsafe_decimal and squashes the following commits:

478b1ba [Davies Liu] address comments
536314c [Davies Liu] Merge branch 'master' of github.com:apache/spark into unsafe_decimal
7c2e77a [Davies Liu] fix JoinedRow
76d6fa4 [Davies Liu] fix tests
99d3151 [Davies Liu] Merge branch 'master' of github.com:apache/spark into unsafe_decimal
d49c6ae [Davies Liu] support DecimalType in UnsafeRow
2015-07-30 17:18:32 -07:00
Daoyuan Wang 1abf7dc16c [SPARK-8186] [SPARK-8187] [SPARK-8194] [SPARK-8198] [SPARK-9133] [SPARK-9290] [SQL] functions: date_add, date_sub, add_months, months_between, time-interval calculation
This PR is based on #7589 , thanks to adrian-wang

Added SQL function date_add, date_sub, add_months, month_between, also add a rule for
add/subtract of date/timestamp and interval.

Closes #7589

cc rxin

Author: Daoyuan Wang <daoyuan.wang@intel.com>
Author: Davies Liu <davies@databricks.com>

Closes #7754 from davies/date_add and squashes the following commits:

e8c633a [Davies Liu] Merge branch 'master' of github.com:apache/spark into date_add
9e8e085 [Davies Liu] Merge branch 'master' of github.com:apache/spark into date_add
6224ce4 [Davies Liu] fix conclict
bd18cd4 [Davies Liu] Merge branch 'master' of github.com:apache/spark into date_add
e47ff2c [Davies Liu] add python api, fix date functions
01943d0 [Davies Liu] Merge branch 'master' into date_add
522e91a [Daoyuan Wang] fix
e8a639a [Daoyuan Wang] fix
42df486 [Daoyuan Wang] fix style
87c4b77 [Daoyuan Wang] function add_months, months_between and some fixes
1a68e03 [Daoyuan Wang] poc of time interval calculation
c506661 [Daoyuan Wang] function date_add , date_sub
2015-07-30 13:21:46 -07:00
Daoyuan Wang 6d94bf6ac1 [SPARK-8174] [SPARK-8175] [SQL] function unix_timestamp, from_unixtime
unix_timestamp(): long
Gets current Unix timestamp in seconds.

unix_timestamp(string|date): long
Converts time string in format yyyy-MM-dd HH:mm:ss to Unix timestamp (in seconds), using the default timezone and the default locale, return null if fail: unix_timestamp('2009-03-20 11:30:01') = 1237573801

unix_timestamp(string date, string pattern): long
Convert time string with given pattern (see [http://docs.oracle.com/javase/tutorial/i18n/format/simpleDateFormat.html]) to Unix time stamp (in seconds), return null if fail: unix_timestamp('2009-03-20', 'yyyy-MM-dd') = 1237532400.

from_unixtime(bigint unixtime[, string format]): string
Converts the number of seconds from unix epoch (1970-01-01 00:00:00 UTC) to a string representing the timestamp of that moment in the current system time zone in the format of "1970-01-01 00:00:00".

Jira:
https://issues.apache.org/jira/browse/SPARK-8174
https://issues.apache.org/jira/browse/SPARK-8175

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #7644 from adrian-wang/udfunixtime and squashes the following commits:

2fe20c4 [Daoyuan Wang] util.Date
ea2ec16 [Daoyuan Wang] use util.Date for better performance
a2cf929 [Daoyuan Wang] doc return null instead of 0
f6f070a [Daoyuan Wang] address comments from davies
6a4cbb3 [Daoyuan Wang] temp
56ded53 [Daoyuan Wang] rebase and address comments
14a8b37 [Daoyuan Wang] function unix_timestamp, from_unixtime
2015-07-30 11:14:09 -07:00
Wenchen Fan c0cc0eaec6 [SPARK-9390][SQL] create a wrapper for array type
Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7724 from cloud-fan/array-data and squashes the following commits:

d0408a1 [Wenchen Fan] fix python
661e608 [Wenchen Fan] rebase
f39256c [Wenchen Fan] fix hive...
6dbfa6f [Wenchen Fan] fix hive again...
8cb8842 [Wenchen Fan] remove element type parameter from getArray
43e9816 [Wenchen Fan] fix mllib
e719afc [Wenchen Fan] fix hive
4346290 [Wenchen Fan] address comment
d4a38da [Wenchen Fan] remove sizeInBytes and add license
7e283e2 [Wenchen Fan] create a wrapper for array type
2015-07-30 10:04:30 -07:00
Joseph Batchik 1221849f91 [SPARK-8005][SQL] Input file name
Users can now get the file name of the partition being read in. A thread local variable is in `SQLNewHadoopRDD` and is set when the partition is computed. `SQLNewHadoopRDD` is moved to core so that the catalyst package can reach it.

This supports:

`df.select(inputFileName())`

and

`sqlContext.sql("select input_file_name() from table")`

Author: Joseph Batchik <josephbatchik@gmail.com>

Closes #7743 from JDrit/input_file_name and squashes the following commits:

abb8609 [Joseph Batchik] fixed failing test and changed the default value to be an empty string
d2f323d [Joseph Batchik] updates per review
102061f [Joseph Batchik] updates per review
75313f5 [Joseph Batchik] small fixes
c7f7b5a [Joseph Batchik] addeding input file name to Spark SQL
2015-07-29 23:35:55 -07:00
Yijie Shen e127ec34d5 [SPARK-9428] [SQL] Add test cases for null inputs for expression unit tests
JIRA: https://issues.apache.org/jira/browse/SPARK-9428

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #7748 from yjshen/string_cleanup and squashes the following commits:

e0c2b3d [Yijie Shen] update codegen in RegExpExtract and RegExpReplace
26614d2 [Yijie Shen] MathFunctionSuite
a402859 [Yijie Shen] complex_create, conditional and cast
6e4e608 [Yijie Shen] arithmetic and cast
52593c1 [Yijie Shen] null input test cases for StringExpressionSuite
2015-07-29 23:24:20 -07:00
Reynold Xin 27850af525 [SPARK-9462][SQL] Initialize nondeterministic expressions in code gen fallback mode.
Author: Reynold Xin <rxin@databricks.com>

Closes #7767 from rxin/SPARK-9462 and squashes the following commits:

ef3e2d9 [Reynold Xin] Removed println
713ac3a [Reynold Xin] More unit tests.
bb5c334 [Reynold Xin] [SPARK-9462][SQL] Initialize nondeterministic expressions in code gen fallback mode.
2015-07-29 21:24:47 -07:00
Reynold Xin 86505962e6 [SPARK-9448][SQL] GenerateUnsafeProjection should not share expressions across instances.
We accidentally moved the list of expressions from the generated code instance to the class wrapper, and as a result, different threads are sharing the same set of expressions, which cause problems for expressions with mutable state.

This pull request fixed that problem, and also added unit tests for all codegen classes, except GeneratedOrdering (which will never need any expressions since sort now only accepts bound references.

Author: Reynold Xin <rxin@databricks.com>

Closes #7759 from rxin/SPARK-9448 and squashes the following commits:

c09b50f [Reynold Xin] [SPARK-9448][SQL] GenerateUnsafeProjection should not share expressions across instances.
2015-07-29 16:49:02 -07:00
Josh Rosen 1b0099fc62 [SPARK-9411] [SQL] Make Tungsten page sizes configurable
We need to make page sizes configurable so we can reduce them in unit tests and increase them in real production workloads.  These sizes are now controlled by a new configuration, `spark.buffer.pageSize`.  The new default is 64 megabytes.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #7741 from JoshRosen/SPARK-9411 and squashes the following commits:

a43c4db [Josh Rosen] Fix pow
2c0eefc [Josh Rosen] Fix MAXIMUM_PAGE_SIZE_BYTES comment + value
bccfb51 [Josh Rosen] Lower page size to 4MB in TestHive
ba54d4b [Josh Rosen] Make UnsafeExternalSorter's page size configurable
0045aa2 [Josh Rosen] Make UnsafeShuffle's page size configurable
bc734f0 [Josh Rosen] Rename configuration
e614858 [Josh Rosen] Makes BytesToBytesMap page size configurable
2015-07-29 16:00:30 -07:00
Reynold Xin 5340dfaf94 [SPARK-9430][SQL] Rename IntervalType to CalendarIntervalType.
We want to introduce a new IntervalType in 1.6 that is based on only the number of microseoncds,
so interval can be compared.

Renaming the existing IntervalType to CalendarIntervalType so we can do that in the future.

Author: Reynold Xin <rxin@databricks.com>

Closes #7745 from rxin/calendarintervaltype and squashes the following commits:

99f64e8 [Reynold Xin] One more line ...
13466c8 [Reynold Xin] Fixed tests.
e20f24e [Reynold Xin] [SPARK-9430][SQL] Rename IntervalType to CalendarIntervalType.
2015-07-29 13:49:22 -07:00
Reynold Xin 97906944e1 [SPARK-9127][SQL] Rand/Randn codegen fails with long seed.
Author: Reynold Xin <rxin@databricks.com>

Closes #7747 from rxin/SPARK-9127 and squashes the following commits:

e851418 [Reynold Xin] [SPARK-9127][SQL] Rand/Randn codegen fails with long seed.
2015-07-29 09:36:22 -07:00
Wenchen Fan 708794e8aa [SPARK-9251][SQL] do not order by expressions which still need evaluation
as an offline discussion with rxin , it's weird to be computing stuff while doing sorting, we should only order by bound reference during execution.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7593 from cloud-fan/sort and squashes the following commits:

7b1bef7 [Wenchen Fan] add test
daf206d [Wenchen Fan] add more comments
289bee0 [Wenchen Fan] do not order by expressions which still need evaluation
2015-07-29 00:08:45 -07:00
Davies Liu 15667a0afa [SPARK-9281] [SQL] use decimal or double when parsing SQL
Right now, we use double to parse all the float number in SQL. When it's used in expression together with DecimalType, it will turn the decimal into double as well. Also it will loss some precision when using double.

This PR change to parse float number to decimal or double, based on it's  using scientific notation or not, see https://msdn.microsoft.com/en-us/library/ms179899.aspx

This is a break change, should we doc it somewhere?

Author: Davies Liu <davies@databricks.com>

Closes #7642 from davies/parse_decimal and squashes the following commits:

1f576d9 [Davies Liu] Merge branch 'master' of github.com:apache/spark into parse_decimal
5e142b6 [Davies Liu] fix scala style
eca99de [Davies Liu] fix tests
2afe702 [Davies Liu] Merge branch 'master' of github.com:apache/spark into parse_decimal
f4a320b [Davies Liu] Update SqlParser.scala
1c48e34 [Davies Liu] use decimal or double when parsing SQL
2015-07-28 22:51:08 -07:00
Yijie Shen 6309b93467 [SPARK-9398] [SQL] Datetime cleanup
JIRA: https://issues.apache.org/jira/browse/SPARK-9398

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #7725 from yjshen/date_null_check and squashes the following commits:

b4eade1 [Yijie Shen] inline daysToMonthEnd
d09acc1 [Yijie Shen] implement getLastDayOfMonth to avoid repeated evaluation
d857ec3 [Yijie Shen] add null check in DateExpressionSuite
2015-07-28 22:38:28 -07:00
Wenchen Fan 429b2f0df4 [SPARK-8608][SPARK-8609][SPARK-9083][SQL] reset mutable states of nondeterministic expression before evaluation and fix PullOutNondeterministic
We will do local projection for LocalRelation, and thus reuse the same Expression object among multiply evaluations. We should reset the mutable states of Expression before evaluate it.

Fix `PullOutNondeterministic` rule to make it work for `Sort`.

Also got a chance to cleanup the dataframe test suite.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7674 from cloud-fan/show and squashes the following commits:

888934f [Wenchen Fan] fix sort
c0e93e8 [Wenchen Fan] local DataFrame with random columns should return same value when call `show`
2015-07-28 21:37:50 -07:00
Josh Rosen e78ec1a8fa [SPARK-9421] Fix null-handling bugs in UnsafeRow.getDouble, getFloat(), and get(ordinal, dataType)
UnsafeRow.getDouble and getFloat() return NaN when called on columns that are null, which is inconsistent with the behavior of other row classes (which is to return 0.0).

In addition, the generic get(ordinal, dataType) method should always return null for a null literal, but currently it handles nulls by calling the type-specific accessors.

This patch addresses both of these issues and adds a regression test.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #7736 from JoshRosen/unsafe-row-null-fixes and squashes the following commits:

c8eb2ee [Josh Rosen] Fix test in UnsafeRowConverterSuite
6214682 [Josh Rosen] Fixes to null handling in UnsafeRow
2015-07-28 17:51:58 -07:00
Reynold Xin b7f54119f8 [SPARK-9420][SQL] Move expressions in sql/core package to catalyst.
Since catalyst package already depends on Spark core, we can move those expressions
into catalyst, and simplify function registry.

This is a followup of #7478.

Author: Reynold Xin <rxin@databricks.com>

Closes #7735 from rxin/SPARK-8003 and squashes the following commits:

2ffbdc3 [Reynold Xin] [SPARK-8003][SQL] Move expressions in sql/core package to catalyst.
2015-07-28 17:03:59 -07:00
Reynold Xin 9bbe0171cb [SPARK-8196][SQL] Fix null handling & documentation for next_day.
The original patch didn't handle nulls correctly for next_day.

Author: Reynold Xin <rxin@databricks.com>

Closes #7718 from rxin/next_day and squashes the following commits:

616a425 [Reynold Xin] Merged DatetimeExpressionsSuite into DateFunctionsSuite.
faa78cf [Reynold Xin] Merged DatetimeFunctionsSuite into DateExpressionsSuite.
6c4fb6a [Reynold Xin] [SPARK-8196][SQL] Fix null handling & documentation for next_day.
2015-07-28 09:43:39 -07:00
Reynold Xin 15724fac56 [SPARK-9394][SQL] Handle parentheses in CodeFormatter.
Our CodeFormatter currently does not handle parentheses, and as a result in code dump, we see code formatted this way:

```
foo(
a,
b,
c)
```

With this patch, it is formatted this way:
```
foo(
  a,
  b,
  c)
```

Author: Reynold Xin <rxin@databricks.com>

Closes #7712 from rxin/codeformat-parentheses and squashes the following commits:

c2b1c5f [Reynold Xin] Took square bracket out
3cfb174 [Reynold Xin] Code review feedback.
91f5bb1 [Reynold Xin] [SPARK-9394][SQL] Handle parentheses in CodeFormatter.
2015-07-28 00:52:26 -07:00
Reynold Xin 60f08c7c87 [SPARK-9373][SQL] Support StructType in Tungsten projection
This pull request updates GenerateUnsafeProjection to support StructType. If an input struct type is backed already by an UnsafeRow, GenerateUnsafeProjection copies the bytes directly into its buffer space without any conversion. However, if the input is not an UnsafeRow, GenerateUnsafeProjection runs the code generated recursively to convert the input into an UnsafeRow and then copies it into the buffer space.

Also create a TungstenProject operator that projects data directly into UnsafeRow. Note that I'm not sure if this is the way we want to structure Unsafe+codegen operators, but we can defer that decision to follow-up pull requests.

Author: Reynold Xin <rxin@databricks.com>

Closes #7689 from rxin/tungsten-struct-type and squashes the following commits:

9162f42 [Reynold Xin] Support IntervalType in UnsafeRow's getter.
be9f377 [Reynold Xin] Fixed tests.
10c4b7c [Reynold Xin] Format generated code.
77e8d0e [Reynold Xin] Fixed NondeterministicSuite.
ac4951d [Reynold Xin] Yay.
ac203bf [Reynold Xin] More comments.
9f36216 [Reynold Xin] Updated comment.
6b781fe [Reynold Xin] Reset the change in DataFrameSuite.
525b95b [Reynold Xin] Merged with master, more documentation & test cases.
321859a [Reynold Xin] [SPARK-9373][SQL] Support StructType in Tungsten projection [WIP]
2015-07-27 22:51:15 -07:00
Daoyuan Wang 2e7f99a004 [SPARK-8195] [SPARK-8196] [SQL] udf next_day last_day
next_day, returns next certain dayofweek.
last_day, returns the last day of the month which given date belongs to.

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #6986 from adrian-wang/udfnlday and squashes the following commits:

ef7e3da [Daoyuan Wang] fix
02b3426 [Daoyuan Wang] address 2 comments
dc69630 [Daoyuan Wang] address comments from rxin
8846086 [Daoyuan Wang] address comments from rxin
d09bcce [Daoyuan Wang] multi fix
1a9de3d [Daoyuan Wang] function next_day and last_day
2015-07-27 21:08:56 -07:00
Wenchen Fan 75438422c2 [SPARK-9369][SQL] Support IntervalType in UnsafeRow
Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7688 from cloud-fan/interval and squashes the following commits:

5b36b17 [Wenchen Fan] fix codegen
a99ed50 [Wenchen Fan] address comment
9e6d319 [Wenchen Fan] Support IntervalType in UnsafeRow
2015-07-27 11:28:22 -07:00
Wenchen Fan dd9ae7945a [SPARK-9351] [SQL] remove literals from grouping expressions in Aggregate
literals in grouping expressions have no effect at all, only make our grouping key bigger, so we should remove them in Optimizer.

I also make old and new aggregation code consistent about literals in grouping here. In old aggregation, actually literals in grouping are already removed but new aggregation is not. So I explicitly make it a rule in Optimizer.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7583 from cloud-fan/minor and squashes the following commits:

471adff [Wenchen Fan] add test
0839925 [Wenchen Fan] use transformDown when rewrite final result expressions
2015-07-27 11:23:29 -07:00
Wenchen Fan e2f38167f8 [SPARK-9376] [SQL] use a seed in RandomDataGeneratorSuite
Make this test deterministic, i.e. make sure this test can be passed no matter how many times we run it.

The origin implementation uses a random seed and gives a chance that we may break the null check assertion `assert(Iterator.fill(100)(generator()).contains(null))`.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7691 from cloud-fan/seed and squashes the following commits:

eae7281 [Wenchen Fan] use a seed in RandomDataGeneratorSuite
2015-07-27 11:02:16 -07:00
Yijie Shen fb5d43fb25 [SPARK-9356][SQL]Remove the internal use of DecimalType.Unlimited
JIRA: https://issues.apache.org/jira/browse/SPARK-9356

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #7671 from yjshen/deprecated_unlimit and squashes the following commits:

c707f56 [Yijie Shen] remove pattern matching in changePrecision
4a1823c [Yijie Shen] remove internal occurrence of Decimal.Unlimited
2015-07-26 10:29:22 -07:00
Reynold Xin 4a01bfc2a2 [SPARK-9350][SQL] Introduce an InternalRow generic getter that requires a DataType
Currently UnsafeRow cannot support a generic getter. However, if the data type is known, we can support a generic getter.

Author: Reynold Xin <rxin@databricks.com>

Closes #7666 from rxin/generic-getter-with-datatype and squashes the following commits:

ee2874c [Reynold Xin] Add a default implementation for getStruct.
1e109a0 [Reynold Xin] [SPARK-9350][SQL] Introduce an InternalRow generic getter that requires a DataType.
033ee88 [Reynold Xin] Removed getAs in non test code.
2015-07-25 23:52:37 -07:00
Reynold Xin b1f4b4abfd [SPARK-9348][SQL] Remove apply method on InternalRow.
Author: Reynold Xin <rxin@databricks.com>

Closes #7665 from rxin/remove-row-apply and squashes the following commits:

0b43001 [Reynold Xin] support getString in UnsafeRow.
176d633 [Reynold Xin] apply -> get.
2941324 [Reynold Xin] [SPARK-9348][SQL] Remove apply method on InternalRow.
2015-07-25 18:41:51 -07:00
Wenchen Fan 2c94d0f24a [SPARK-9192][SQL] add initialization phase for nondeterministic expression
Currently nondeterministic expression is broken without a explicit initialization phase.

Let me take `MonotonicallyIncreasingID` as an example. This expression need a mutable state to remember how many times it has been evaluated, so we use `transient var count: Long` there. By being transient, the `count` will be reset to 0 and **only** to 0 when serialize and deserialize it, as deserialize transient variable will result to default value. There is *no way* to use another initial value for `count`, until we add the explicit initialization phase.

Another use case is local execution for `LocalRelation`, there is no serialize and deserialize phase and thus we can't reset mutable states for it.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7535 from cloud-fan/init and squashes the following commits:

6c6f332 [Wenchen Fan] add test
ef68ff4 [Wenchen Fan] fix comments
9eac85e [Wenchen Fan] move init code to interpreted class
bb7d838 [Wenchen Fan] pulls out nondeterministic expressions into a project
b4a4fc7 [Wenchen Fan] revert a refactor
86fee36 [Wenchen Fan] add initialization phase for nondeterministic expression
2015-07-25 12:10:02 -07:00
Reynold Xin 215713e199 [SPARK-9334][SQL] Remove UnsafeRowConverter in favor of UnsafeProjection.
The two are redundant.

Once this patch is merged, I plan to remove the inbound conversions from unsafe aggregates.

Author: Reynold Xin <rxin@databricks.com>

Closes #7658 from rxin/unsafeconverters and squashes the following commits:

ed19e6c [Reynold Xin] Updated support types.
2a56d7e [Reynold Xin] [SPARK-9334][SQL] Remove UnsafeRowConverter in favor of UnsafeProjection.
2015-07-25 01:37:41 -07:00
Reynold Xin c84acd4aa4 [SPARK-9331][SQL] Add a code formatter to auto-format generated code.
The generated expression code can be hard to read since they are not indented well. This patch adds a code formatter that formats code automatically when we output them to the screen.

Author: Reynold Xin <rxin@databricks.com>

Closes #7656 from rxin/codeformatter and squashes the following commits:

5ba0e90 [Reynold Xin] [SPARK-9331][SQL] Add a code formatter to auto-format generated code.
2015-07-24 19:35:24 -07:00
Josh Rosen 6aceaf3d62 [SPARK-9295] Analysis should detect sorting on unsupported column types
This patch extends CheckAnalysis to throw errors for queries that try to sort on unsupported column types, such as ArrayType.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #7633 from JoshRosen/SPARK-9295 and squashes the following commits:

23b2fbf [Josh Rosen] Embed function in foreach
bfe1451 [Josh Rosen] Update to allow sorting by null literals
2f1b802 [Josh Rosen] Add analysis rule to detect sorting on unsupported column types (SPARK-9295)
2015-07-24 11:34:23 -07:00
Josh Rosen c2b50d693e [SPARK-9292] Analysis should check that join conditions' data types are BooleanType
This patch adds an analysis check to ensure that join conditions' data types are BooleanType. This check is necessary in order to report proper errors for non-boolean DataFrame join conditions.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #7630 from JoshRosen/SPARK-9292 and squashes the following commits:

aec6c7b [Josh Rosen] Check condition type in resolved()
75a3ea6 [Josh Rosen] Fix SPARK-9292.
2015-07-24 09:49:50 -07:00
Reynold Xin c8d71a4183 [SPARK-9305] Rename org.apache.spark.Row to Item.
It's a thing used in test cases, but named Row. Pretty annoying because everytime I search for Row, it shows up before the Spark SQL Row, which is what a developer wants most of the time.

Author: Reynold Xin <rxin@databricks.com>

Closes #7638 from rxin/remove-row and squashes the following commits:

aeda52d [Reynold Xin] [SPARK-9305] Rename org.apache.spark.Row to Item.
2015-07-24 09:38:13 -07:00
Reynold Xin 431ca39be5 [SPARK-9285][SQL] Remove InternalRow's inheritance from Row.
I also changed InternalRow's size/length function to numFields, to make it more obvious that it is not about bytes, but the number of fields.

Author: Reynold Xin <rxin@databricks.com>

Closes #7626 from rxin/internalRow and squashes the following commits:

e124daf [Reynold Xin] Fixed test case.
805ceb7 [Reynold Xin] Commented out the failed test suite.
f8a9ca5 [Reynold Xin] Fixed more bugs. Still at least one more remaining.
76d9081 [Reynold Xin] Fixed data sources.
7807f70 [Reynold Xin] Fixed DataFrameSuite.
cb60cd2 [Reynold Xin] Code review & small bug fixes.
0a2948b [Reynold Xin] Fixed style.
3280d03 [Reynold Xin] [SPARK-9285][SQL] Remove InternalRow's inheritance from Row.
2015-07-24 09:37:36 -07:00
Davies Liu dfb18be036 [SPARK-9069] [SQL] follow up
Address comments for #7605

cc rxin

Author: Davies Liu <davies@databricks.com>

Closes #7634 from davies/decimal_unlimited2 and squashes the following commits:

b2d8b0d [Davies Liu] add doc and test for DecimalType.isWiderThan
65b251c [Davies Liu] fix test
6a91f32 [Davies Liu] fix style
ca9c973 [Davies Liu] address comments
2015-07-24 08:24:13 -07:00
Reynold Xin cb8c241f05 [SPARK-9200][SQL] Don't implicitly cast non-atomic types to string type.
Author: Reynold Xin <rxin@databricks.com>

Closes #7636 from rxin/complex-string-implicit-cast and squashes the following commits:

3e67327 [Reynold Xin] [SPARK-9200][SQL] Don't implicitly cast non-atomic types to string type.
2015-07-24 01:18:43 -07:00
Davies Liu 8a94eb23d5 [SPARK-9069] [SPARK-9264] [SQL] remove unlimited precision support for DecimalType
Romove Decimal.Unlimited (change to support precision up to 38, to match with Hive and other databases).

In order to keep backward source compatibility, Decimal.Unlimited is still there, but change to Decimal(38, 18).

If no precision and scale is provide, it's Decimal(10, 0) as before.

Author: Davies Liu <davies@databricks.com>

Closes #7605 from davies/decimal_unlimited and squashes the following commits:

aa3f115 [Davies Liu] fix tests and style
fb0d20d [Davies Liu] address comments
bfaae35 [Davies Liu] fix style
df93657 [Davies Liu] address comments and clean up
06727fd [Davies Liu] Merge branch 'master' of github.com:apache/spark into decimal_unlimited
4c28969 [Davies Liu] fix tests
8d783cc [Davies Liu] fix tests
788631c [Davies Liu] fix double with decimal in Union/except
1779bde [Davies Liu] fix scala style
c9c7c78 [Davies Liu] remove Decimal.Unlimited
2015-07-23 18:31:13 -07:00
Reynold Xin fb36397b3c Revert "[SPARK-8579] [SQL] support arbitrary object in UnsafeRow"
Reverts ObjectPool. As it stands, it has a few problems:

1. ObjectPool doesn't work with spilling and memory accounting.
2. I don't think in the long run the idea of an object pool is what we want to support, since it essentially goes back to unmanaged memory, and creates pressure on GC, and is hard to account for the total in memory size.
3. The ObjectPool patch removed the specialized getters for strings and binary, and as a result, actually introduced branches when reading non primitive data types.

If we do want to support arbitrary user defined types in the future, I think we can just add an object array in UnsafeRow, rather than relying on indirect memory addressing through a pool. We also need to pick execution strategies that are optimized for those, rather than keeping a lot of unserialized JVM objects in memory during aggregation.

This is probably the hardest thing I had to revert in Spark, due to recent patches that also change the same part of the code. Would be great to get a careful look.

Author: Reynold Xin <rxin@databricks.com>

Closes #7591 from rxin/revert-object-pool and squashes the following commits:

01db0bc [Reynold Xin] Scala style.
eda89fc [Reynold Xin] Fixed describe.
2967118 [Reynold Xin] Fixed accessor for JoinedRow.
e3294eb [Reynold Xin] Merge branch 'master' into revert-object-pool
657855f [Reynold Xin] Temp commit.
c20f2c8 [Reynold Xin] Style fix.
fe37079 [Reynold Xin] Revert "[SPARK-8579] [SQL] support arbitrary object in UnsafeRow"
2015-07-23 01:51:34 -07:00
Yijie Shen 6d0d8b4069 [SPARK-8935] [SQL] Implement code generation for all casts
JIRA: https://issues.apache.org/jira/browse/SPARK-8935

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #7365 from yjshen/cast_codegen and squashes the following commits:

ef6e8b5 [Yijie Shen] getColumn and setColumn in struct cast, autounboxing in array and map
eaece18 [Yijie Shen] remove null case in cast code gen
fd7eba4 [Yijie Shen] resolve comments
80378a5 [Yijie Shen] the missing self cast
611d66e [Yijie Shen] Bug fix: NullType & primitive object unboxing
6d5c0fe [Yijie Shen] rebase and add Interval codegen
9424b65 [Yijie Shen] tiny style fix
4a1c801 [Yijie Shen] remove CodeHolder class, use function instead.
3f5df88 [Yijie Shen] CodeHolder for complex dataTypes
c286f13 [Yijie Shen] moved all the cast code into class body
4edfd76 [Yijie Shen] [WIP] finished primitive part
2015-07-22 23:44:08 -07:00
Yijie Shen 86f80e2b47 [SPARK-9165] [SQL] codegen for CreateArray, CreateStruct and CreateNamedStruct
JIRA: https://issues.apache.org/jira/browse/SPARK-9165

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #7537 from yjshen/array_struct_codegen and squashes the following commits:

3a6dce6 [Yijie Shen] use infix notion in createArray test
5e90f0a [Yijie Shen] resolve comments: classOf
39cefb8 [Yijie Shen] codegen for createArray createStruct & createNamedStruct
2015-07-22 12:19:59 -07:00
Wenchen Fan 76520955fd [SPARK-9082] [SQL] Filter using non-deterministic expressions should not be pushed down
Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7446 from cloud-fan/filter and squashes the following commits:

330021e [Wenchen Fan] add exists to tree node
2cab68c [Wenchen Fan] more enhance
949be07 [Wenchen Fan] push down part of predicate if possible
3912f84 [Wenchen Fan] address comments
8ce15ca [Wenchen Fan] fix bug
557158e [Wenchen Fan] Filter using non-deterministic expressions should not be pushed down
2015-07-22 11:45:51 -07:00
Reynold Xin a4c83cb1e4 [SPARK-9154][SQL] Rename formatString to format_string.
Also make format_string the canonical form, rather than printf.

Author: Reynold Xin <rxin@databricks.com>

Closes #7579 from rxin/format_strings and squashes the following commits:

53ee54f [Reynold Xin] Fixed unit tests.
52357e1 [Reynold Xin] Add format_string alias.
b40a42a [Reynold Xin] [SPARK-9154][SQL] Rename formatString to format_string.
2015-07-21 19:14:07 -07:00
Tarek Auel d4c7a7a364 [SPARK-9154] [SQL] codegen StringFormat
Jira: https://issues.apache.org/jira/browse/SPARK-9154

fixes bug of #7546

marmbrus I can't reopen the other PR, because I didn't closed it. Can you trigger Jenkins?

Author: Tarek Auel <tarek.auel@googlemail.com>

Closes #7571 from tarekauel/SPARK-9154 and squashes the following commits:

dcae272 [Tarek Auel] [SPARK-9154][SQL] build fix
1487602 [Tarek Auel] Merge remote-tracking branch 'upstream/master' into SPARK-9154
f512c5f [Tarek Auel] [SPARK-9154][SQL] build fix
a943d3e [Tarek Auel] [SPARK-9154] implicit input cast, added tests for null, support for null primitives
10b4de8 [Tarek Auel] [SPARK-9154][SQL] codegen removed fallback trait
cd8322b [Tarek Auel] [SPARK-9154][SQL] codegen string format
086caba [Tarek Auel] [SPARK-9154][SQL] codegen string format
2015-07-21 15:47:40 -07:00
Michael Armbrust 87d890cc10 Revert "[SPARK-9154] [SQL] codegen StringFormat"
This reverts commit 7f072c3d5e.

Revert #7546

Author: Michael Armbrust <michael@databricks.com>

Closes #7570 from marmbrus/revert9154 and squashes the following commits:

ed2c32a [Michael Armbrust] Revert "[SPARK-9154] [SQL] codegen StringFormat"
2015-07-21 11:18:39 -07:00
Tarek Auel 7f072c3d5e [SPARK-9154] [SQL] codegen StringFormat
Jira: https://issues.apache.org/jira/browse/SPARK-9154

Author: Tarek Auel <tarek.auel@googlemail.com>

Closes #7546 from tarekauel/SPARK-9154 and squashes the following commits:

a943d3e [Tarek Auel] [SPARK-9154] implicit input cast, added tests for null, support for null primitives
10b4de8 [Tarek Auel] [SPARK-9154][SQL] codegen removed fallback trait
cd8322b [Tarek Auel] [SPARK-9154][SQL] codegen string format
086caba [Tarek Auel] [SPARK-9154][SQL] codegen string format
2015-07-21 09:58:16 -07:00
Yijie Shen be5c5d3741 [SPARK-9081] [SPARK-9168] [SQL] nanvl & dropna/fillna supporting nan as well
JIRA:
https://issues.apache.org/jira/browse/SPARK-9081
https://issues.apache.org/jira/browse/SPARK-9168

This PR target at two modifications:
1.  Change `isNaN` to return `false` on `null` input
2.  Make `dropna` and `fillna` to fill/drop NaN values as well
3.  Implement `nanvl`

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #7523 from yjshen/fillna_dropna and squashes the following commits:

f0a51db [Yijie Shen] make coalesce untouched and implement nanvl
1d3e35f [Yijie Shen] make Coalesce aware of NaN in order to support fillna
2760cbc [Yijie Shen] change isNaN(null) to false as well as implement dropna
2015-07-21 08:25:50 -07:00
Yijie Shen ae230596b8 [SPARK-9173][SQL]UnionPushDown should also support Intersect and Except
JIRA: https://issues.apache.org/jira/browse/SPARK-9173

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #7540 from yjshen/union_pushdown and squashes the following commits:

278510a [Yijie Shen] rename UnionPushDown to SetOperationPushDown
91741c1 [Yijie Shen] Add UnionPushDown support for intersect and except
2015-07-21 00:56:57 -07:00
Pedro Rodriguez 560c658a74 [SPARK-8230][SQL] Add array/map size method
Pull Request for: https://issues.apache.org/jira/browse/SPARK-8230

Primary issue resolved is to implement array/map size for Spark SQL. Code is ready for review by a committer. Chen Hao is on the JIRA ticket, but I don't know his username on github, rxin is also on JIRA ticket.

Things to review:
1. Where to put added functions namespace wise, they seem to be part of a few operations on collections which includes `sort_array` and `array_contains`. Hence the name given `collectionOperations.scala` and `_collection_functions` in python.
2. In Python code, should it be in a `1.5.0` function array or in a collections array?
3. Are there any missing methods on the `Size` case class? Looks like many of these functions have generated Java code, is that also needed in this case?
4. Something else?

Author: Pedro Rodriguez <ski.rodriguez@gmail.com>
Author: Pedro Rodriguez <prodriguez@trulia.com>

Closes #7462 from EntilZha/SPARK-8230 and squashes the following commits:

9a442ae [Pedro Rodriguez] fixed functions and sorted __all__
9aea3bb [Pedro Rodriguez] removed imports from python docs
15d4bf1 [Pedro Rodriguez] Added null test case and changed to nullSafeCodeGen
d88247c [Pedro Rodriguez] removed python code
bd5f0e4 [Pedro Rodriguez] removed duplicate function from rebase/merge
59931b4 [Pedro Rodriguez] fixed compile bug instroduced when merging
c187175 [Pedro Rodriguez] updated code to add size to __all__ directly and removed redundent pretty print
130839f [Pedro Rodriguez] fixed failing test
aa9bade [Pedro Rodriguez] fix style
e093473 [Pedro Rodriguez] updated python code with docs, switched classes/traits implemented, added (failing) expression tests
0449377 [Pedro Rodriguez] refactored code to use better abstract classes/traits and implementations
9a1a2ff [Pedro Rodriguez] added unit tests for map size
2bfbcb6 [Pedro Rodriguez] added unit test for size
20df2b4 [Pedro Rodriguez] Finished working version of size function and added it to python
b503e75 [Pedro Rodriguez] First attempt at implementing size for maps and arrays
99a6a5c [Pedro Rodriguez] fixed failing test
cac75ac [Pedro Rodriguez] fix style
933d843 [Pedro Rodriguez] updated python code with docs, switched classes/traits implemented, added (failing) expression tests
42bb7d4 [Pedro Rodriguez] refactored code to use better abstract classes/traits and implementations
f9c3b8a [Pedro Rodriguez] added unit tests for map size
2515d9f [Pedro Rodriguez] added documentation
0e60541 [Pedro Rodriguez] added unit test for size
acf9853 [Pedro Rodriguez] Finished working version of size function and added it to python
84a5d38 [Pedro Rodriguez] First attempt at implementing size for maps and arrays
2015-07-21 00:53:20 -07:00
Cheng Hao 8c8f0ef59e [SPARK-8255] [SPARK-8256] [SQL] Add regex_extract/regex_replace
Add expressions `regex_extract` & `regex_replace`

Author: Cheng Hao <hao.cheng@intel.com>

Closes #7468 from chenghao-intel/regexp and squashes the following commits:

e5ea476 [Cheng Hao] minor update for documentation
ef96fd6 [Cheng Hao] update the code gen
72cf28f [Cheng Hao] Add more log for compilation error
4e11381 [Cheng Hao] Add regexp_replace / regexp_extract support
2015-07-21 00:48:07 -07:00
Josh Rosen c032b0bf92 [SPARK-8797] [SPARK-9146] [SPARK-9145] [SPARK-9147] Support NaN ordering and equality comparisons in Spark SQL
This patch addresses an issue where queries that sorted float or double columns containing NaN values could fail with "Comparison method violates its general contract!" errors from TimSort.  The root of this problem is that `NaN > anything`, `NaN == anything`, and `NaN < anything` all return `false`.

Per the design specified in SPARK-9079, we have decided that `NaN = NaN` should return true and that NaN should appear last when sorting in ascending order (i.e. it is larger than any other numeric value).

In addition to implementing these semantics, this patch also adds canonicalization of NaN values in UnsafeRow, which is necessary in order to be able to do binary equality comparisons on equal NaNs that might have different bit representations (see SPARK-9147).

Author: Josh Rosen <joshrosen@databricks.com>

Closes #7194 from JoshRosen/nan and squashes the following commits:

983d4fc [Josh Rosen] Merge remote-tracking branch 'origin/master' into nan
88bd73c [Josh Rosen] Fix Row.equals()
a702e2e [Josh Rosen] normalization -> canonicalization
a7267cf [Josh Rosen] Normalize NaNs in UnsafeRow
fe629ae [Josh Rosen] Merge remote-tracking branch 'origin/master' into nan
fbb2a29 [Josh Rosen] Fix NaN comparisons in BinaryComparison expressions
c1fd4fe [Josh Rosen] Fold NaN test into existing test framework
b31eb19 [Josh Rosen] Uncomment failing tests
7fe67af [Josh Rosen] Support NaN == NaN (SPARK-9145)
58bad2c [Josh Rosen] Revert "Compare rows' string representations to work around NaN incomparability."
fc6b4d2 [Josh Rosen] Update CodeGenerator
3998ef2 [Josh Rosen] Remove unused code
a2ba2e7 [Josh Rosen] Fix prefix comparision for NaNs
a30d371 [Josh Rosen] Compare rows' string representations to work around NaN incomparability.
6f03f85 [Josh Rosen] Fix bug in Double / Float ordering
42a1ad5 [Josh Rosen] Stop filtering NaNs in UnsafeExternalSortSuite
bfca524 [Josh Rosen] Change ordering so that NaN is maximum value.
8d7be61 [Josh Rosen] Update randomized test to use ScalaTest's assume()
b20837b [Josh Rosen] Add failing test for new NaN comparision ordering
5b88b2b [Josh Rosen] Fix compilation of CodeGenerationSuite
d907b5b [Josh Rosen] Merge remote-tracking branch 'origin/master' into nan
630ebc5 [Josh Rosen] Specify an ordering for NaN values.
9bf195a [Josh Rosen] Re-enable NaNs in CodeGenerationSuite to produce more regression tests
13fc06a [Josh Rosen] Add regression test for NaN sorting issue
f9efbb5 [Josh Rosen] Fix ORDER BY NULL
e7dc4fb [Josh Rosen] Add very generic test for ordering
7d5c13e [Josh Rosen] Add regression test for SPARK-8782 (ORDER BY NULL)
b55875a [Josh Rosen] Generate doubles and floats over entire possible range.
5acdd5c [Josh Rosen] Infinity and NaN are interesting.
ab76cbd [Josh Rosen] Move code to Catalyst package.
d2b4a4a [Josh Rosen] Add random data generator test utilities to Spark SQL.
2015-07-20 22:38:05 -07:00
Tarek Auel a3c7a3ce32 [SPARK-9132][SPARK-9163][SQL] codegen conv
Jira: https://issues.apache.org/jira/browse/SPARK-9132
https://issues.apache.org/jira/browse/SPARK-9163

rxin as you proposed in the Jira ticket, I just moved the logic to a separate object. I haven't changed anything of the logic of `NumberConverter`.

Author: Tarek Auel <tarek.auel@googlemail.com>

Closes #7552 from tarekauel/SPARK-9163 and squashes the following commits:

40dcde9 [Tarek Auel] [SPARK-9132][SPARK-9163][SQL] style fix
fa985bd [Tarek Auel] [SPARK-9132][SPARK-9163][SQL] codegen conv
2015-07-20 22:08:12 -07:00
Tarek Auel c9db8eaa42 [SPARK-9159][SQL] codegen ascii, base64, unbase64
Jira: https://issues.apache.org/jira/browse/SPARK-9159

Author: Tarek Auel <tarek.auel@googlemail.com>

Closes #7542 from tarekauel/SPARK-9159 and squashes the following commits:

772e6bc [Tarek Auel] [SPARK-9159][SQL] codegen ascii, base64, unbase64
2015-07-20 15:32:46 -07:00
Tarek Auel 5112b7f58b [SPARK-9153][SQL] codegen StringLPad/StringRPad
Jira: https://issues.apache.org/jira/browse/SPARK-9153

Author: Tarek Auel <tarek.auel@googlemail.com>

Closes #7527 from tarekauel/SPARK-9153 and squashes the following commits:

3840c6b [Tarek Auel] [SPARK-9153] removed codegen fallback
92b6a5d [Tarek Auel] [SPARK-9153] codegen lpad/rpad
2015-07-20 09:35:45 -07:00
Liang-Chi Hsieh d743bec645 [SPARK-9172][SQL] Make DecimalPrecision support for Intersect and Except
JIRA: https://issues.apache.org/jira/browse/SPARK-9172

Simply make `DecimalPrecision` support for `Intersect` and `Except` in addition to `Union`.

Besides, add unit test for `DecimalPrecision` as well.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #7511 from viirya/more_decimalprecieion and squashes the following commits:

4d29d10 [Liang-Chi Hsieh] Fix code comment.
9fb0d49 [Liang-Chi Hsieh] Make DecimalPrecision support for Intersect and Except.
2015-07-19 20:53:18 -07:00
Reynold Xin 163e3f1df9 [SPARK-8241][SQL] string function: concat_ws.
I also changed the semantics of concat w.r.t. null back to the same behavior as Hive.
That is to say, concat now returns null if any input is null.

Author: Reynold Xin <rxin@databricks.com>

Closes #7504 from rxin/concat_ws and squashes the following commits:

83fd950 [Reynold Xin] Fixed type casting.
3ae85f7 [Reynold Xin] Write null better.
cdc7be6 [Reynold Xin] Added code generation for pure string mode.
a61c4e4 [Reynold Xin] Updated comments.
2d51406 [Reynold Xin] [SPARK-8241][SQL] string function: concat_ws.
2015-07-19 16:48:47 -07:00
Cheng Lian 34ed82bb44 [HOTFIX] [SQL] Fixes compilation error introduced by PR #7506
PR #7506 breaks master build because of compilation error. Note that #7506 itself looks good, but it seems that `git merge` did something stupid.

Author: Cheng Lian <lian@databricks.com>

Closes #7510 from liancheng/hotfix-for-pr-7506 and squashes the following commits:

7ea7e89 [Cheng Lian] Fixes compilation error
2015-07-19 18:58:19 +08:00
Reynold Xin 3427937ea2 [SQL] Make date/time functions more consistent with other database systems.
This pull request fixes some of the problems in #6981.

- Added date functions to `__all__` so they get exposed
- Rename day_of_month -> dayofmonth
- Rename day_in_year -> dayofyear
- Rename week_of_year -> weekofyear
- Removed "day" from Scala/Python API since it is ambiguous. Only leaving the alias in SQL.

Author: Reynold Xin <rxin@databricks.com>

This patch had conflicts when merged, resolved by
Committer: Reynold Xin <rxin@databricks.com>

Closes #7506 from rxin/datetime and squashes the following commits:

0cb24d9 [Reynold Xin] Export all functions in Python.
e44a4a0 [Reynold Xin] Removed day function from Scala and Python.
9c08fdc [Reynold Xin] [SQL] Make date/time functions more consistent with other database systems.
2015-07-19 01:17:22 -07:00
Tarek Auel a53d13f7aa [SPARK-8199][SQL] follow up; revert change in test
rxin / davies

Sorry for that unnecessary change. And thanks again for all your support!

Author: Tarek Auel <tarek.auel@googlemail.com>

Closes #7505 from tarekauel/SPARK-8199-FollowUp and squashes the following commits:

d09321c [Tarek Auel] [SPARK-8199] follow up; revert change in test
c17397f [Tarek Auel] [SPARK-8199] follow up; revert change in test
67acfe6 [Tarek Auel] [SPARK-8199] follow up; revert change in test
2015-07-19 01:16:01 -07:00
Reynold Xin 04c1b49f5e Fixed test cases. 2015-07-18 22:50:34 -07:00
Tarek Auel 83b682beec [SPARK-8199][SPARK-8184][SPARK-8183][SPARK-8182][SPARK-8181][SPARK-8180][SPARK-8179][SPARK-8177][SPARK-8178][SPARK-9115][SQL] date functions
Jira:
https://issues.apache.org/jira/browse/SPARK-8199
https://issues.apache.org/jira/browse/SPARK-8184
https://issues.apache.org/jira/browse/SPARK-8183
https://issues.apache.org/jira/browse/SPARK-8182
https://issues.apache.org/jira/browse/SPARK-8181
https://issues.apache.org/jira/browse/SPARK-8180
https://issues.apache.org/jira/browse/SPARK-8179
https://issues.apache.org/jira/browse/SPARK-8177
https://issues.apache.org/jira/browse/SPARK-8179
https://issues.apache.org/jira/browse/SPARK-9115

Regarding `day`and `dayofmonth` are both necessary?

~~I am going to add `Quarter` to this PR as well.~~ Done.

~~As soon as the Scala coding is reviewed and discussed, I'll add the python api.~~ Done

Author: Tarek Auel <tarek.auel@googlemail.com>
Author: Tarek Auel <tarek.auel@gmail.com>

Closes #6981 from tarekauel/SPARK-8199 and squashes the following commits:

f7b4c8c [Tarek Auel] [SPARK-8199] fixed bug in tests
bb567b6 [Tarek Auel] [SPARK-8199] fixed test
3e095ba [Tarek Auel] [SPARK-8199] style and timezone fix
256c357 [Tarek Auel] [SPARK-8199] code cleanup
5983dcc [Tarek Auel] [SPARK-8199] whitespace fix
6e0c78f [Tarek Auel] [SPARK-8199] removed setTimeZone in tests, according to cloud-fans comment in #7488
4afc09c [Tarek Auel] [SPARK-8199] concise leap year handling
ea6c110 [Tarek Auel] [SPARK-8199] fix after merging master
70238e0 [Tarek Auel] Merge branch 'master' into SPARK-8199
3c6ae2e [Tarek Auel] [SPARK-8199] removed binary search
fb98ba0 [Tarek Auel] [SPARK-8199] python docstring fix
cdfae27 [Tarek Auel] [SPARK-8199] cleanup & python docstring fix
746b80a [Tarek Auel] [SPARK-8199] build fix
0ad6db8 [Tarek Auel] [SPARK-8199] minor fix
523542d [Tarek Auel] [SPARK-8199] address comments
2259299 [Tarek Auel] [SPARK-8199] day_of_month alias
d01b977 [Tarek Auel] [SPARK-8199] python underscore
56c4a92 [Tarek Auel] [SPARK-8199] update python docu
e223bc0 [Tarek Auel] [SPARK-8199] refactoring
d6aa14e [Tarek Auel] [SPARK-8199] fixed Hive compatibility
b382267 [Tarek Auel] [SPARK-8199] fixed bug in day calculation; removed set TimeZone in HiveCompatibilitySuite for test purposes; removed Hive tests for second and minute, because we can cast '2015-03-18' to a timestamp and extract a minute/second from it
1b2e540 [Tarek Auel] [SPARK-8119] style fix
0852655 [Tarek Auel] [SPARK-8119] changed from ExpectsInputTypes to implicit casts
ec87c69 [Tarek Auel] [SPARK-8119] bug fixing and refactoring
1358cdc [Tarek Auel] Merge remote-tracking branch 'origin/master' into SPARK-8199
740af0e [Tarek Auel] implement date function using a calculation based on days
4fb66da [Tarek Auel] WIP: date functions on calculation only
1a436c9 [Tarek Auel] wip
f775f39 [Tarek Auel] fixed return type
ad17e96 [Tarek Auel] improved implementation
c42b444 [Tarek Auel] Removed merge conflict file
ccb723c [Tarek Auel] [SPARK-8199] style and fixed merge issues
10e4ad1 [Tarek Auel] Merge branch 'master' into date-functions-fast
7d9f0eb [Tarek Auel] [SPARK-8199] git renaming issue
f3e7a9f [Tarek Auel] [SPARK-8199] revert change in DataFrameFunctionsSuite
6f5d95c [Tarek Auel] [SPARK-8199] fixed year interval
d9f8ac3 [Tarek Auel] [SPARK-8199] implement fast track
7bc9d93 [Tarek Auel] Merge branch 'master' into SPARK-8199
5a105d9 [Tarek Auel] [SPARK-8199] rebase after #6985 got merged
eb6760d [Tarek Auel] Merge branch 'master' into SPARK-8199
f120415 [Tarek Auel] improved runtime
a8edebd [Tarek Auel] use Calendar instead of SimpleDateFormat
5fe74e1 [Tarek Auel] fixed python style
3bfac90 [Tarek Auel] fixed style
356df78 [Tarek Auel] rely on cast mechanism of Spark. Simplified implementation
02efc5d [Tarek Auel] removed doubled code
a5ea120 [Tarek Auel] added python api; changed test to be more meaningful
b680db6 [Tarek Auel] added codegeneration to all functions
c739788 [Tarek Auel] added support for quarter SPARK-8178
849fb41 [Tarek Auel] fixed stupid test
638596f [Tarek Auel] improved codegen
4d8049b [Tarek Auel] fixed tests and added type check
5ebb235 [Tarek Auel] resolved naming conflict
d0e2f99 [Tarek Auel] date functions
2015-07-18 22:48:05 -07:00
Forest Fang 6cb6096c01 [SPARK-8443][SQL] Split GenerateMutableProjection Codegen due to JVM Code Size Limits
By grouping projection calls into multiple apply function, we are able to push the number of projections codegen can handle from ~1k to ~60k. I have set the unit test to test against 5k as 60k took 15s for the unit test to complete.

Author: Forest Fang <forest.fang@outlook.com>

Closes #7076 from saurfang/codegen_size_limit and squashes the following commits:

b7a7635 [Forest Fang] [SPARK-8443][SQL] Execute and verify split projections in test
adef95a [Forest Fang] [SPARK-8443][SQL] Use safer factor and rewrite splitting code
1b5aa7e [Forest Fang] [SPARK-8443][SQL] inline execution if one block only
9405680 [Forest Fang] [SPARK-8443][SQL] split projection code by size limit
2015-07-18 21:05:44 -07:00
Reynold Xin 9914b1b2c5 [SPARK-9150][SQL] Create CodegenFallback and Unevaluable trait
It is very hard to track which expressions have code gen implemented or not. This patch removes the default fallback gencode implementation from Expression, and moves that into a new trait called CodegenFallback. Each concrete expression needs to either implement code generation, or mix in CodegenFallback. This makes it very easy to track which expressions have code generation implemented already.

Additionally, this patch creates an Unevaluable trait that can be used to track expressions that don't support evaluation (e.g. Star).

Author: Reynold Xin <rxin@databricks.com>

Closes #7487 from rxin/codegenfallback and squashes the following commits:

14ebf38 [Reynold Xin] Fixed Conv
6c1c882 [Reynold Xin] Fixed Alias.
b42611b [Reynold Xin] [SPARK-9150][SQL] Create a trait to track code generation for expressions.
cb5c066 [Reynold Xin] Removed extra import.
39cbe40 [Reynold Xin] [SPARK-8240][SQL] string function: concat
2015-07-18 18:18:19 -07:00
Reynold Xin 6e1e2eba69 [SPARK-8240][SQL] string function: concat
Author: Reynold Xin <rxin@databricks.com>

Closes #7486 from rxin/concat and squashes the following commits:

5217d6e [Reynold Xin] Removed Hive's concat test.
f5cb7a3 [Reynold Xin] Concat is never nullable.
ae4e61f [Reynold Xin] Removed extra import.
fddcbbd [Reynold Xin] Fixed NPE.
22e831c [Reynold Xin] Added missing file.
57a2352 [Reynold Xin] [SPARK-8240][SQL] string function: concat
2015-07-18 14:07:56 -07:00
Yijie Shen 3d2134fc0d [SPARK-9055][SQL] WidenTypes should also support Intersect and Except
JIRA: https://issues.apache.org/jira/browse/SPARK-9055

cc rxin

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #7491 from yijieshen/widen and squashes the following commits:

079fa52 [Yijie Shen] widenType support for intersect and expect
2015-07-18 12:57:53 -07:00
Wenchen Fan 86c50bf72c [SPARK-9171][SQL] add and improve tests for nondeterministic expressions
Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7496 from cloud-fan/tests and squashes the following commits:

0958f90 [Wenchen Fan] improve test for nondeterministic expressions
2015-07-18 11:58:53 -07:00
Wenchen Fan 692378c01d [SPARK-9167][SQL] use UTC Calendar in stringToDate
fix 2 bugs introduced in https://github.com/apache/spark/pull/7353

1. we should use UTC Calendar when cast string to date . Before #7353 , we use `DateTimeUtils.fromJavaDate(Date.valueOf(s.toString))` to cast string to date, and `fromJavaDate` will call `millisToDays` to avoid the time zone issue. Now we use `DateTimeUtils.stringToDate(s)`, we should create a Calendar with UTC in the begging.
2. we should not change the default time zone in test cases. The `threadLocalLocalTimeZone` and `threadLocalTimestampFormat` in `DateTimeUtils` will only be evaluated once for each thread, so we can't set the default time zone back anymore.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7488 from cloud-fan/datetime and squashes the following commits:

9cd6005 [Wenchen Fan] address comments
21ef293 [Wenchen Fan] fix 2 bugs in datetime
2015-07-18 11:25:16 -07:00
Reynold Xin fba3f5ba85 [SPARK-9169][SQL] Improve unit test coverage for null expressions.
Author: Reynold Xin <rxin@databricks.com>

Closes #7490 from rxin/unit-test-null-funcs and squashes the following commits:

7b276f0 [Reynold Xin] Move isNaN.
8307287 [Reynold Xin] [SPARK-9169][SQL] Improve unit test coverage for null expressions.
2015-07-18 11:06:46 -07:00
Yijie Shen 529a2c2d92 [SPARK-8280][SPARK-8281][SQL]Handle NaN, null and Infinity in math
JIRA:
https://issues.apache.org/jira/browse/SPARK-8280
https://issues.apache.org/jira/browse/SPARK-8281

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #7451 from yijieshen/nan_null2 and squashes the following commits:

47a529d [Yijie Shen] style fix
63dee44 [Yijie Shen] handle log expressions similar to Hive
188be51 [Yijie Shen] null to nan in Math Expression
2015-07-17 17:33:19 -07:00
Wenchen Fan bd903ee89f [SPARK-9117] [SQL] fix BooleanSimplification in case-insensitive
Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7452 from cloud-fan/boolean-simplify and squashes the following commits:

2a6e692 [Wenchen Fan] fix style
d3cfd26 [Wenchen Fan] fix BooleanSimplification in case-insensitive
2015-07-17 16:28:24 -07:00
Wenchen Fan fd6b3101fb [SPARK-9113] [SQL] enable analysis check code for self join
The check was unreachable before, as `case operator: LogicalPlan` catches everything already.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7449 from cloud-fan/tmp and squashes the following commits:

2bb6637 [Wenchen Fan] add test
5493aea [Wenchen Fan] add the check back
27221a7 [Wenchen Fan] remove unnecessary analysis check code for self join
2015-07-17 16:03:33 -07:00
Yijie Shen 15fc2ffe55 [SPARK-9080][SQL] add isNaN predicate expression
JIRA: https://issues.apache.org/jira/browse/SPARK-9080

cc rxin

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #7464 from yijieshen/isNaN and squashes the following commits:

11ae039 [Yijie Shen] add isNaN in functions
666718e [Yijie Shen] add isNaN predicate expression
2015-07-17 15:49:31 -07:00
Wenchen Fan 074085d678 [SPARK-9136] [SQL] fix several bugs in DateTimeUtils.stringToTimestamp
a follow up of https://github.com/apache/spark/pull/7353

1. we should use `Calendar.HOUR_OF_DAY` instead of `Calendar.HOUR`(this is for AM, PM).
2. we should call `c.set(Calendar.MILLISECOND, 0)` after `Calendar.getInstance`

I'm not sure why the tests didn't fail in jenkins, but I ran latest spark master branch locally and `DateTimeUtilsSuite` failed.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7473 from cloud-fan/datetime and squashes the following commits:

66cdaf2 [Wenchen Fan] fix several bugs in DateTimeUtils.stringToTimestamp
2015-07-17 13:57:31 -07:00
Liang-Chi Hsieh eba6a1af4c [SPARK-8945][SQL] Add add and subtract expressions for IntervalType
JIRA: https://issues.apache.org/jira/browse/SPARK-8945

Add add and subtract expressions for IntervalType.

Author: Liang-Chi Hsieh <viirya@appier.com>

This patch had conflicts when merged, resolved by
Committer: Reynold Xin <rxin@databricks.com>

Closes #7398 from viirya/interval_add_subtract and squashes the following commits:

acd1f1e [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into interval_add_subtract
5abae28 [Liang-Chi Hsieh] For comments.
6f5b72e [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into interval_add_subtract
dbe3906 [Liang-Chi Hsieh] For comments.
13a2fc5 [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into interval_add_subtract
83ec129 [Liang-Chi Hsieh] Remove intervalMethod.
acfe1ab [Liang-Chi Hsieh] Fix scala style.
d3e9d0e [Liang-Chi Hsieh] Add add and subtract expressions for IntervalType.
2015-07-17 09:38:08 -07:00
zhichao.li 305e77cd83 [SPARK-8209[SQL]Add function conv
cc chenghao-intel  adrian-wang

Author: zhichao.li <zhichao.li@intel.com>

Closes #6872 from zhichao-li/conv and squashes the following commits:

6ef3b37 [zhichao.li] add unittest and comments
78d9836 [zhichao.li] polish dataframe api and add unittest
e2bace3 [zhichao.li] update to use ImplicitCastInputTypes
cbcad3f [zhichao.li] add function conv
2015-07-17 09:32:27 -07:00
Wenchen Fan 59d24c226a [SPARK-9130][SQL] throw exception when check equality between external and internal row
instead of return false, throw exception when check equality between external and internal row is better.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7460 from cloud-fan/row-compare and squashes the following commits:

8a20911 [Wenchen Fan] improve equals
402daa8 [Wenchen Fan] throw exception when check equality between external and internal row
2015-07-17 09:31:13 -07:00
Davies Liu ec8973d124 [SPARK-9022] [SQL] Generated projections for UnsafeRow
Added two projections: GenerateUnsafeProjection and FromUnsafeProjection, which could be used to convert UnsafeRow from/to GenericInternalRow.

They will re-use the buffer during projection, similar to MutableProjection (without all the interface MutableProjection has).

cc rxin JoshRosen

Author: Davies Liu <davies@databricks.com>

Closes #7437 from davies/unsafe_proj2 and squashes the following commits:

dbf538e [Davies Liu] test with all the expression (only for supported types)
dc737b2 [Davies Liu] address comment
e424520 [Davies Liu] fix scala style
70e231c [Davies Liu] address comments
729138d [Davies Liu] Merge branch 'master' of github.com:apache/spark into unsafe_proj2
5a26373 [Davies Liu] unsafe projections
2015-07-17 01:27:14 -07:00
Wenchen Fan 3f6d28a5ca [SPARK-9102] [SQL] Improve project collapse with nondeterministic expressions
Currently we will stop project collapse when the lower projection has nondeterministic expressions. However it's overkill sometimes, we should be able to optimize `df.select(Rand(10)).select('a)` to `df.select('a)`

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7445 from cloud-fan/non-deterministic and squashes the following commits:

0deaef6 [Wenchen Fan] Improve project collapse with nondeterministic expressions
2015-07-17 00:59:15 -07:00
Tarek Auel 4ea6480a3b [SPARK-8995] [SQL] cast date strings like '2015-01-01 12:15:31' to date
Jira https://issues.apache.org/jira/browse/SPARK-8995

In PR #6981we noticed that we cannot cast date strings that contains a time, like '2015-03-18 12:39:40' to date. Besides it's not possible to cast a string like '18:03:20' to a timestamp.

If a time is passed without a date, today is inferred as date.

Author: Tarek Auel <tarek.auel@googlemail.com>
Author: Tarek Auel <tarek.auel@gmail.com>

Closes #7353 from tarekauel/SPARK-8995 and squashes the following commits:

14f333b [Tarek Auel] [SPARK-8995] added tests for daylight saving time
ca1ae69 [Tarek Auel] [SPARK-8995] style fix
d20b8b4 [Tarek Auel] [SPARK-8995] bug fix: distinguish between 0 and null
ef05753 [Tarek Auel] [SPARK-8995] added check for year >= 1000
01c9ff3 [Tarek Auel] [SPARK-8995] support for time strings
34ec573 [Tarek Auel] fixed style
71622c0 [Tarek Auel] improved timestamp and date parsing
0e30c0a [Tarek Auel] Hive compatibility
cfbaed7 [Tarek Auel] fixed wrong checks
71f89c1 [Tarek Auel] [SPARK-8995] minor style fix
f7452fa [Tarek Auel] [SPARK-8995] removed old timestamp parsing
30e5aec [Tarek Auel] [SPARK-8995] date and timestamp cast
c1083fb [Tarek Auel] [SPARK-8995] cast date strings like '2015-01-01 12:15:31' to date or timestamp
2015-07-16 08:26:39 -07:00
Wenchen Fan ba33096846 [SPARK-9068][SQL] refactor the implicit type cast code
based on https://github.com/apache/spark/pull/7348

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7420 from cloud-fan/type-check and squashes the following commits:

7633fa9 [Wenchen Fan] revert
fe169b0 [Wenchen Fan] improve test
03b70da [Wenchen Fan] enhance implicit type cast
2015-07-15 22:27:39 -07:00
Cheng Hao 42dea3acf9 [SPARK-8245][SQL] FormatNumber/Length Support for Expression
- `BinaryType` for `Length`
- `FormatNumber`

Author: Cheng Hao <hao.cheng@intel.com>

Closes #7034 from chenghao-intel/expression and squashes the following commits:

e534b87 [Cheng Hao] python api style issue
601bbf5 [Cheng Hao] add python API support
3ebe288 [Cheng Hao] update as feedback
52274f7 [Cheng Hao] add support for udf_format_number and length for binary
2015-07-15 21:47:21 -07:00
Yin Huai 9c64a75bfc [SPARK-9060] [SQL] Revert SPARK-8359, SPARK-8800, and SPARK-8677
JIRA: https://issues.apache.org/jira/browse/SPARK-9060

This PR reverts:
* 31bd30687b (SPARK-8359)
* 24fda73811 (SPARK-8677)
* 4b5cfc988f (SPARK-8800)

Author: Yin Huai <yhuai@databricks.com>

Closes #7426 from yhuai/SPARK-9060 and squashes the following commits:

651264d [Yin Huai] Revert "[SPARK-8359] [SQL] Fix incorrect decimal precision after multiplication"
cfda7e4 [Yin Huai] Revert "[SPARK-8677] [SQL] Fix non-terminating decimal expansion for decimal divide operation"
2de9afe [Yin Huai] Revert "[SPARK-8800] [SQL] Fix inaccurate precision/scale of Decimal division operation"
2015-07-15 21:08:30 -07:00
zhichao.li a9385271a9 [SPARK-8221][SQL]Add pmod function
https://issues.apache.org/jira/browse/SPARK-8221

One concern is the result would be negative if the divisor is not positive( i.e pmod(7, -3) ), but the behavior is the same as hive.

Author: zhichao.li <zhichao.li@intel.com>

Closes #6783 from zhichao-li/pmod2 and squashes the following commits:

7083eb9 [zhichao.li] update to the latest type checking
d26dba7 [zhichao.li] add pmod
2015-07-15 10:43:38 -07:00
Reynold Xin 14935d846a [HOTFIX][SQL] Unit test breaking. 2015-07-15 00:12:21 -07:00
Yijie Shen f0e129740d [SPARK-8279][SQL]Add math function round
JIRA: https://issues.apache.org/jira/browse/SPARK-8279

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #6938 from yijieshen/udf_round_3 and squashes the following commits:

07a124c [Yijie Shen] remove useless def children
392b65b [Yijie Shen] add negative scale test in DecimalSuite
61760ee [Yijie Shen] address reviews
302a78a [Yijie Shen] Add dataframe function test
31dfe7c [Yijie Shen] refactor round to make it readable
8c7a949 [Yijie Shen] rebase & inputTypes update
9555e35 [Yijie Shen] tiny style fix
d10be4a [Yijie Shen] use TypeCollection to specify wanted input and implicit cast
c3b9839 [Yijie Shen] rely on implict cast to handle string input
b0bff79 [Yijie Shen] make round's inner method's name more meaningful
9bd6930 [Yijie Shen] revert accidental change
e6f44c4 [Yijie Shen] refactor eval and genCode
1b87540 [Yijie Shen] modify checkInputDataTypes using foldable
5486b2d [Yijie Shen] DataFrame API modification
2077888 [Yijie Shen] codegen versioned eval
6cd9a64 [Yijie Shen] refactor Round's constructor
9be894e [Yijie Shen] add round functions in o.a.s.sql.functions
7c83e13 [Yijie Shen] more tests on round
56db4bb [Yijie Shen] Add decimal support to Round
7e163ae [Yijie Shen] style fix
653d047 [Yijie Shen] Add math function round
2015-07-14 23:30:41 -07:00
Reynold Xin f23a721c10 [SPARK-8993][SQL] More comprehensive type checking in expressions.
This patch makes the following changes:

1. ExpectsInputTypes only defines expected input types, but does not perform any implicit type casting.
2. ImplicitCastInputTypes is a new trait that defines both expected input types, as well as performs implicit type casting.
3. BinaryOperator has a new abstract function "inputType", which defines the expected input type for both left/right. Concrete BinaryOperator expressions no longer perform any implicit type casting.
4. For BinaryOperators, convert NullType (i.e. null literals) into some accepted type so BinaryOperators don't need to handle NullTypes.

TODOs needed: fix unit tests for error reporting.

I'm intentionally not changing anything in aggregate expressions because yhuai is doing a big refactoring on that right now.

Author: Reynold Xin <rxin@databricks.com>

Closes #7348 from rxin/typecheck and squashes the following commits:

8fcf814 [Reynold Xin] Fixed ordering of cases.
3bb63e7 [Reynold Xin] Style fix.
f45408f [Reynold Xin] Comment update.
aa7790e [Reynold Xin] Moved RemoveNullTypes into ImplicitTypeCasts.
438ea07 [Reynold Xin] space
d55c9e5 [Reynold Xin] Removes NullTypes.
360d124 [Reynold Xin] Fixed the rule.
fb66657 [Reynold Xin] Convert NullType into some accepted type for BinaryOperators.
2e22330 [Reynold Xin] Fixed unit tests.
4932d57 [Reynold Xin] Style fix.
d061691 [Reynold Xin] Rename existing ExpectsInputTypes -> ImplicitCastInputTypes.
e4727cc [Reynold Xin] BinaryOperator should not be doing implicit cast.
d017861 [Reynold Xin] Improve expression type checking.
2015-07-14 22:52:53 -07:00
Liang-Chi Hsieh 4b5cfc988f [SPARK-8800] [SQL] Fix inaccurate precision/scale of Decimal division operation
JIRA: https://issues.apache.org/jira/browse/SPARK-8800

Previously, we turn to Java BigDecimal's divide with specified ROUNDING_MODE to avoid non-terminating decimal expansion problem. However, as JihongMA reported, for the division operation on some specific values, we get inaccurate results.

Author: Liang-Chi Hsieh <viirya@gmail.com>

Closes #7212 from viirya/fix_decimal4 and squashes the following commits:

4205a0a [Liang-Chi Hsieh] Fix inaccuracy precision/scale of Decimal division operation.
2015-07-14 14:19:27 -07:00
Daoyuan Wang 257236c3e1 [SPARK-6851] [SQL] function least/greatest follow up
This is a follow up of remaining comments from #6851

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #7387 from adrian-wang/udflgfollow and squashes the following commits:

6163e62 [Daoyuan Wang] add skipping null values
e8c2e09 [Daoyuan Wang] use seq
8362966 [Daoyuan Wang] pr6851 follow up
2015-07-14 01:09:33 -07:00
Vinod K C 4c797f2b09 [SPARK-8636] [SQL] Fix equalNullSafe comparison
Author: Vinod K C <vinod.kc@huawei.com>

Closes #7040 from vinodkc/fix_CaseKeyWhen_equalNullSafe and squashes the following commits:

be5e641 [Vinod K C] Renamed equalNullSafe to threeValueEquals
aac9f67 [Vinod K C] Updated test suite and genCode method
f2d0b53 [Vinod K C]  Fix equalNullSafe comparison
2015-07-13 12:51:33 -07:00
Wenchen Fan 6b89943834 [SPARK-8944][SQL] Support casting between IntervalType and StringType
Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7355 from cloud-fan/fromString and squashes the following commits:

3bbb9d6 [Wenchen Fan] fix code gen
7dab957 [Wenchen Fan] naming fix
0fbbe19 [Wenchen Fan] address comments
ac1f3d1 [Wenchen Fan] Support casting between IntervalType and StringType
2015-07-13 00:49:39 -07:00
Daoyuan Wang 92540d22e4 [SPARK-8203] [SPARK-8204] [SQL] conditional function: least/greatest
chenghao-intel zhichao-li qiansl127

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #6851 from adrian-wang/udflg and squashes the following commits:

0f1bff2 [Daoyuan Wang] address comments from davis
7a6bdbb [Daoyuan Wang] add '.' for hex()
c1f6824 [Daoyuan Wang] add codegen, test for all types
ec625b0 [Daoyuan Wang] conditional function: least/greatest
2015-07-13 00:14:32 -07:00
Cheng Hao 0b0b9ceaf7 [SPARK-8247] [SPARK-8249] [SPARK-8252] [SPARK-8254] [SPARK-8257] [SPARK-8258] [SPARK-8259] [SPARK-8261] [SPARK-8262] [SPARK-8253] [SPARK-8260] [SPARK-8267] [SQL] Add String Expressions
Author: Cheng Hao <hao.cheng@intel.com>

Closes #6762 from chenghao-intel/str_funcs and squashes the following commits:

b09a909 [Cheng Hao] update the code as feedback
7ebbf4c [Cheng Hao] Add more string expressions
2015-07-09 11:11:34 -07:00
Reynold Xin a870a82fb6 [SPARK-8926][SQL] Code review followup.
I merged https://github.com/apache/spark/pull/7303 so it unblocks another PR. This addresses my own code review comment for that PR.

Author: Reynold Xin <rxin@databricks.com>

Closes #7313 from rxin/adt and squashes the following commits:

7ade82b [Reynold Xin] Fixed unit tests.
f8d5533 [Reynold Xin] [SPARK-8926][SQL] Code review followup.
2015-07-09 10:01:33 -07:00
Tarek Auel a1964e9d90 [SPARK-8830] [SQL] native levenshtein distance
Jira: https://issues.apache.org/jira/browse/SPARK-8830

rxin and HuJiayin can you have a look on it.

Author: Tarek Auel <tarek.auel@googlemail.com>

Closes #7236 from tarekauel/native-levenshtein-distance and squashes the following commits:

ee4c4de [Tarek Auel] [SPARK-8830] implemented improvement proposals
c252e71 [Tarek Auel] [SPARK-8830] removed chartAt; use unsafe method for byte array comparison
ddf2222 [Tarek Auel] Merge branch 'master' into native-levenshtein-distance
179920a [Tarek Auel] [SPARK-8830] added description
5e9ed54 [Tarek Auel] [SPARK-8830] removed StringUtils import
dce4308 [Tarek Auel] [SPARK-8830] native levenshtein distance
2015-07-09 09:23:35 -07:00
Michael Armbrust 768907eb7b [SPARK-8926][SQL] Good errors for ExpectsInputType expressions
For example: `cannot resolve 'testfunction(null)' due to data type mismatch: argument 1 is expected to be of type int, however, null is of type datetype.`

Author: Michael Armbrust <michael@databricks.com>

Closes #7303 from marmbrus/expectsTypeErrors and squashes the following commits:

c654a0e [Michael Armbrust] fix udts and make errors pretty
137160d [Michael Armbrust] style
5428fda [Michael Armbrust] style
10fac82 [Michael Armbrust] [SPARK-8926][SQL] Good errors for ExpectsInputType expressions
2015-07-08 22:05:58 -07:00
Josh Rosen b55499a44a [SPARK-8932] Support copy() for UnsafeRows that do not use ObjectPools
We call Row.copy() in many places throughout SQL but UnsafeRow currently throws UnsupportedOperationException when copy() is called.

Supporting copying when ObjectPool is used may be difficult, since we may need to handle deep-copying of objects in the pool. In addition, this copy() method needs to produce a self-contained row object which may be passed around / buffered by downstream code which does not understand the UnsafeRow format.

In the long run, we'll need to figure out how to handle the ObjectPool corner cases, but this may be unnecessary if other changes are made. Therefore, in order to unblock my sort patch (#6444) I propose that we support copy() for the cases where UnsafeRow does not use an ObjectPool and continue to throw UnsupportedOperationException when an ObjectPool is used.

This patch accomplishes this by modifying UnsafeRow so that it knows the size of the row's backing data in order to be able to copy it into a byte array.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #7306 from JoshRosen/SPARK-8932 and squashes the following commits:

338e6bf [Josh Rosen] Support copy for UnsafeRows that do not use ObjectPools.
2015-07-08 20:28:05 -07:00
Yijie Shen a290814877 [SPARK-8866][SQL] use 1us precision for timestamp type
JIRA: https://issues.apache.org/jira/browse/SPARK-8866

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #7283 from yijieshen/micro_timestamp and squashes the following commits:

dc735df [Yijie Shen] update CastSuite to avoid round error
714eaea [Yijie Shen] add timestamp_udf into blacklist due to precision lose
c3ca2f4 [Yijie Shen] fix unhandled case in CurrentTimestamp
8d4aa6b [Yijie Shen] use 1us precision for timestamp type
2015-07-08 20:20:17 -07:00
Reynold Xin 5d603dfe49 [SPARK-8878][SQL] Improve unit test coverage for bitwise expressions.
Author: Reynold Xin <rxin@databricks.com>

Closes #7273 from rxin/bitwise-unittest and squashes the following commits:

60c5667 [Reynold Xin] [SPARK-8878][SQL] Improve unit test coverage for bitwise expressions.
2015-07-07 19:12:40 -07:00
Reynold Xin 770ff1025e [SPARK-8876][SQL] Remove InternalRow type alias in expressions package.
The type alias was there because initially when I moved Row around, I didn't want to do massive changes to the expression code. But now it should be pretty easy to just remove it. One less concept to worry about.

Author: Reynold Xin <rxin@databricks.com>

Closes #7270 from rxin/internalrow and squashes the following commits:

72fc842 [Reynold Xin] [SPARK-8876][SQL] Remove InternalRow type alias in expressions package.
2015-07-07 17:40:14 -07:00
Liang-Chi Hsieh da56c4e728 [SPARK-8794] [SQL] Make PrunedScan work for Sample
JIRA: https://issues.apache.org/jira/browse/SPARK-8794

Currently `PrunedScan` works only when followed by project or filter operations. However, even if there is a `Sample` between these operations and `PrunedScan`, `PrunedScan` should work too.

Author: Liang-Chi Hsieh <viirya@appier.com>
Author: Liang-Chi Hsieh <viirya@gmail.com>

Closes #7228 from viirya/sample_prunedscan and squashes the following commits:

ede7cd8 [Liang-Chi Hsieh] Keep PrunedScanSuite untouched.
6f05d30 [Liang-Chi Hsieh] Move unit test to FilterPushdownSuite.
5f32473 [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into sample_prunedscan
7e4ba76 [Liang-Chi Hsieh] Use Optimzier for push down projection and filter.
0686830 [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into sample_prunedscan
df82785 [Liang-Chi Hsieh] Make PrunedScan work on Sample.
2015-07-07 15:49:22 -07:00
Yin Huai 7b467cc934 [SPARK-8588] [SQL] Regression test
This PR adds regression test for https://issues.apache.org/jira/browse/SPARK-8588 (fixed by 457d07eaa0).

Author: Yin Huai <yhuai@databricks.com>

This patch had conflicts when merged, resolved by
Committer: Michael Armbrust <michael@databricks.com>

Closes #7103 from yhuai/SPARK-8588-test and squashes the following commits:

eb5f418 [Yin Huai] Add a query test.
c61a173 [Yin Huai] Regression test for SPARK-8588.
2015-07-06 16:28:47 -07:00
Davies Liu 37e4d92142 [SPARK-8784] [SQL] Add Python API for hex and unhex
Add Python API for hex/unhex,  also cleanup Hex/Unhex

Author: Davies Liu <davies@databricks.com>

Closes #7223 from davies/hex and squashes the following commits:

6f1249d [Davies Liu] no explicit rule to cast string into binary
711a6ed [Davies Liu] fix test
f9fe5a3 [Davies Liu] Merge branch 'master' of github.com:apache/spark into hex
f032fbb [Davies Liu] Merge branch 'hex' of github.com:davies/spark into hex
49e325f [Davies Liu] Merge branch 'master' of github.com:apache/spark into hex
b31fc9a [Davies Liu] Update math.scala
25156b7 [Davies Liu] address comments and fix test
c3af78c [Davies Liu] address commments
1a24082 [Davies Liu] Add Python API for hex and unhex
2015-07-06 13:31:31 -07:00
Reynold Xin 86768b7b3b [SPARK-8831][SQL] Support AbstractDataType in TypeCollection.
Otherwise it is impossible to declare an expression supporting DecimalType.

Author: Reynold Xin <rxin@databricks.com>

Closes #7232 from rxin/typecollection-adt and squashes the following commits:

934d3d1 [Reynold Xin] [SPARK-8831][SQL] Support AbstractDataType in TypeCollection.
2015-07-05 23:54:25 -07:00
Reynold Xin c991ef5abb [SPARK-8822][SQL] clean up type checking in math.scala.
Author: Reynold Xin <rxin@databricks.com>

Closes #7220 from rxin/SPARK-8822 and squashes the following commits:

0cda076 [Reynold Xin] Test cases.
22d0463 [Reynold Xin] Fixed type precedence.
beb2a97 [Reynold Xin] [SPARK-8822][SQL] clean up type checking in math.scala.
2015-07-04 11:55:20 -07:00
Reynold Xin 347cab85cd [SQL] More unit tests for implicit type cast & add simpleString to AbstractDataType.
Author: Reynold Xin <rxin@databricks.com>

Closes #7221 from rxin/implicit-cast-tests and squashes the following commits:

64b13bd [Reynold Xin] Fixed a bug ..
489b732 [Reynold Xin] [SQL] More unit tests for implicit type cast & add simpleString to AbstractDataType.
2015-07-04 11:55:04 -07:00
Tarek Auel 6b3574e687 [SPARK-8270][SQL] levenshtein distance
Jira: https://issues.apache.org/jira/browse/SPARK-8270

Info: I can not build the latest master, it stucks during the build process: `[INFO] Dependency-reduced POM written at: /Users/tarek/test/spark/bagel/dependency-reduced-pom.xml`

Author: Tarek Auel <tarek.auel@googlemail.com>

Closes #7214 from tarekauel/SPARK-8270 and squashes the following commits:

ab348b9 [Tarek Auel] Merge branch 'master' into SPARK-8270
a2ad318 [Tarek Auel] [SPARK-8270] changed order of fields
d91b12c [Tarek Auel] [SPARK-8270] python fix
adbd075 [Tarek Auel] [SPARK-8270] fixed typo
23185c9 [Tarek Auel] [SPARK-8270] levenshtein distance
2015-07-04 01:10:52 -07:00
Cheng Hao f35b0c3436 [SPARK-8238][SPARK-8239][SPARK-8242][SPARK-8243][SPARK-8268][SQL]Add ascii/base64/unbase64/encode/decode functions
Add `ascii`,`base64`,`unbase64`,`encode` and `decode` expressions.

Author: Cheng Hao <hao.cheng@intel.com>

Closes #6843 from chenghao-intel/str_funcs2 and squashes the following commits:

78dee7d [Cheng Hao] base 64 -> base64
9d6f9f4 [Cheng Hao] remove the toString method for expressions
ed5c19c [Cheng Hao] update code as comments
96170fc [Cheng Hao] scalastyle issues
e2df768 [Cheng Hao] remove the unused import
491ce7b [Cheng Hao] add ascii/base64/unbase64/encode/decode functions
2015-07-03 23:45:21 -07:00
Josh Rosen f32487b7ca [SPARK-8777] [SQL] Add random data generator test utilities to Spark SQL
This commit adds a set of random data generation utilities to Spark SQL, for use in its own unit tests.

- `RandomDataGenerator.forType(DataType)` returns an `Option[() => Any]` that, if defined, contains a function for generating random values for the given DataType.  The random values use the external representations for the given DataType (for example, for DateType we return `java.sql.Date` instances instead of longs).
- `DateTypeTestUtilities` defines some convenience fields for looping over instances of data types.  For example, `numericTypes` holds `DataType` instances for all supported numeric types.  These constants will help us to raise the level of abstraction in our tests.  For example, it's now very easy to write a test which is parameterized by all common data types.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #7176 from JoshRosen/sql-random-data-generators and squashes the following commits:

f71634d [Josh Rosen] Roll back ScalaCheck usage
e0d7d49 [Josh Rosen] Bump ScalaCheck version in LICENSE
89d86b1 [Josh Rosen] Bump ScalaCheck version.
0c20905 [Josh Rosen] Initial attempt at using ScalaCheck.
b55875a [Josh Rosen] Generate doubles and floats over entire possible range.
5acdd5c [Josh Rosen] Infinity and NaN are interesting.
ab76cbd [Josh Rosen] Move code to Catalyst package.
d2b4a4a [Josh Rosen] Add random data generator test utilities to Spark SQL.
2015-07-03 23:05:17 -07:00
Daoyuan Wang 9fb6b832bc [SPARK-8192] [SPARK-8193] [SQL] udf current_date, current_timestamp
Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #6985 from adrian-wang/udfcurrent and squashes the following commits:

6a20b64 [Daoyuan Wang] remove codegen and add lazy in testsuite
27c9f95 [Daoyuan Wang] refine tests..
e11ae75 [Daoyuan Wang] refine tests
61ed3d5 [Daoyuan Wang] add in functions
98e8550 [Daoyuan Wang] fix sytle
427d9dc [Daoyuan Wang] add tests and codegen
0b69a1f [Daoyuan Wang] udf current
2015-07-03 22:19:43 -07:00
zhichao.li ab535b9a1d [SPARK-8226] [SQL] Add function shiftrightunsigned
Author: zhichao.li <zhichao.li@intel.com>

Closes #7035 from zhichao-li/shiftRightUnsigned and squashes the following commits:

6bcca5a [zhichao.li] change coding style
3e9f5ae [zhichao.li] python style
d85ae0b [zhichao.li] add shiftrightunsigned
2015-07-03 15:39:16 -07:00
Reynold Xin a59d14f623 [SPARK-8801][SQL] Support TypeCollection in ExpectsInputTypes
This patch adds a new TypeCollection AbstractDataType that can be used by expressions to specify more than one expected input types.

Author: Reynold Xin <rxin@databricks.com>

Closes #7202 from rxin/type-collection and squashes the following commits:

c714ca1 [Reynold Xin] Fixed style.
a0c0d12 [Reynold Xin] Fixed bugs and unit tests.
d8b8ae7 [Reynold Xin] Added TypeCollection.
2015-07-02 21:45:25 -07:00
zhichao.li 1a7a7d7d57 [SPARK-8213][SQL]Add function factorial
Author: zhichao.li <zhichao.li@intel.com>

Closes #6822 from zhichao-li/factorial and squashes the following commits:

26edf4f [zhichao.li] add factorial
2015-07-02 20:37:31 -07:00
Reynold Xin e589e71a29 Revert "[SPARK-8784] [SQL] Add Python API for hex and unhex"
This reverts commit fc7aebd94a.
2015-07-02 16:25:10 -07:00
Davies Liu fc7aebd94a [SPARK-8784] [SQL] Add Python API for hex and unhex
Also improve the performance of hex/unhex

Author: Davies Liu <davies@databricks.com>

Closes #7181 from davies/hex and squashes the following commits:

f032fbb [Davies Liu] Merge branch 'hex' of github.com:davies/spark into hex
49e325f [Davies Liu] Merge branch 'master' of github.com:apache/spark into hex
b31fc9a [Davies Liu] Update math.scala
25156b7 [Davies Liu] address comments and fix test
c3af78c [Davies Liu] address commments
1a24082 [Davies Liu] Add Python API for hex and unhex
2015-07-02 15:43:02 -07:00
Reynold Xin 52508beb65 [SPARK-8772][SQL] Implement implicit type cast for expressions that define input types.
Author: Reynold Xin <rxin@databricks.com>

Closes #7175 from rxin/implicitCast and squashes the following commits:

88080a2 [Reynold Xin] Clearer definition of implicit type cast.
f0ff97f [Reynold Xin] Added missing file.
c65e532 [Reynold Xin] [SPARK-8772][SQL] Implement implicit type cast for expressions that defines input types.
2015-07-02 14:16:14 -07:00
Yijie Shen 52302a8039 [SPARK-8407] [SQL] complex type constructors: struct and named_struct
This is a follow up of [SPARK-8283](https://issues.apache.org/jira/browse/SPARK-8283) ([PR-6828](https://github.com/apache/spark/pull/6828)), to support both `struct` and `named_struct` in Spark SQL.

After [#6725](https://github.com/apache/spark/pull/6828), the semantic of [`CreateStruct`](https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypes.scala#L56) methods have changed a little and do not limited to cols of `NamedExpressions`, it will name non-NamedExpression fields following the hive convention, col1, col2 ...

This PR would both loosen [`struct`](https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/functions.scala#L723) to take children of `Expression` type and add `named_struct` support.

Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #6874 from yijieshen/SPARK-8283 and squashes the following commits:

4cd3375ac [Yijie Shen] change struct documentation
d599d0b [Yijie Shen] rebase code
9a7039e [Yijie Shen] fix reviews and regenerate golden answers
b487354 [Yijie Shen] replace assert using checkAnswer
f07e114 [Yijie Shen] tiny fix
9613be9 [Yijie Shen] review fix
7fef712 [Yijie Shen] Fix checkInputTypes' implementation using foldable and nullable
60812a7 [Yijie Shen] Fix type check
828d694 [Yijie Shen] remove unnecessary resolved assertion inside dataType method
fd3cd8e [Yijie Shen] remove type check from eval
7a71255 [Yijie Shen] tiny fix
ccbbd86 [Yijie Shen] Fix reviews
47da332 [Yijie Shen] remove nameStruct API from DataFrame
917e680 [Yijie Shen] Fix reviews
4bd75ad [Yijie Shen] loosen struct method in functions.scala to take Expression children
0acb7be [Yijie Shen] Add CreateNamedStruct in both DataFrame function API and FunctionRegistery
2015-07-02 10:12:25 -07:00
Wenchen Fan afa021e03f [SPARK-8747] [SQL] fix EqualNullSafe for binary type
also improve tests for binary comparison.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #7143 from cloud-fan/binary and squashes the following commits:

28a5b76 [Wenchen Fan] improve test
04ef4b0 [Wenchen Fan] fix equalNullSafe
2015-07-02 10:06:38 -07:00
Tarek Auel 5b3338130d [SPARK-8223] [SPARK-8224] [SQL] shift left and shift right
Jira:
https://issues.apache.org/jira/browse/SPARK-8223
https://issues.apache.org/jira/browse/SPARK-8224

~~I am aware of #7174 and will update this pr, if it's merged.~~ Done
I don't know if #7034 can simplify this, but we can have a look on it, if it gets merged

rxin In the Jira ticket the function as no second argument. I added a `numBits` argument that allows to specify the number of bits. I guess this improves the usability. I wanted to add `shiftleft(value)` as well, but the `selectExpr` dataframe tests crashes, if I have both. I order to do this, I added the following to the functions.scala `def shiftRight(e: Column): Column = ShiftRight(e.expr, lit(1).expr)`, but as I mentioned this doesn't pass tests like `df.selectExpr("shiftRight(a)", ...` (not enough arguments exception).

If we need the bitwise shift in order to be hive compatible, I suggest to add `shiftLeft` and something like `shiftLeftX`

Author: Tarek Auel <tarek.auel@googlemail.com>

Closes #7178 from tarekauel/8223 and squashes the following commits:

8023bb5 [Tarek Auel] [SPARK-8223][SPARK-8224] fixed test
f3f64e6 [Tarek Auel] [SPARK-8223][SPARK-8224] Integer -> Int
f628706 [Tarek Auel] [SPARK-8223][SPARK-8224] removed toString; updated function description
3b56f2a [Tarek Auel] Merge remote-tracking branch 'origin/master' into 8223
5189690 [Tarek Auel] [SPARK-8223][SPARK-8224] minor fix and style fix
9434a28 [Tarek Auel] Merge remote-tracking branch 'origin/master' into 8223
44ee324 [Tarek Auel] [SPARK-8223][SPARK-8224] docu fix
ac7fe9d [Tarek Auel] [SPARK-8223][SPARK-8224] right and left bit shift
2015-07-02 10:02:19 -07:00
zhichao.li b285ac5ba8 [SPARK-8227] [SQL] Add function unhex
cc chenghao-intel  adrian-wang

Author: zhichao.li <zhichao.li@intel.com>

Closes #7113 from zhichao-li/unhex and squashes the following commits:

379356e [zhichao.li] remove exception checking
a4ae6dc [zhichao.li] add udf_unhex to whitelist
fe5c14a [zhichao.li] add todigit
607d7a3 [zhichao.li] use checkInputTypes
bffd37f [zhichao.li] change to use Hex in apache common package
cde73f5 [zhichao.li] update to use AutoCastInputTypes
11945c7 [zhichao.li] style
c852d46 [zhichao.li] Add function unhex
2015-07-01 22:19:51 -07:00
Reynold Xin 9fd13d5613 [SPARK-8770][SQL] Create BinaryOperator abstract class.
Our current BinaryExpression abstract class is not for generic binary expressions, i.e. it requires left/right children to have the same type. However, due to its name, contributors build new binary expressions that don't have that assumption (e.g. Sha) and still extend BinaryExpression.

This patch creates a new BinaryOperator abstract class, and update the analyzer o only apply type casting rule there. This patch also adds the notion of "prettyName" to expressions, which defines the user-facing name for the expression.

Author: Reynold Xin <rxin@databricks.com>

Closes #7174 from rxin/binary-opterator and squashes the following commits:

f31900d [Reynold Xin] [SPARK-8770][SQL] Create BinaryOperator abstract class.
fceb216 [Reynold Xin] Merge branch 'master' of github.com:apache/spark into binary-opterator
d8518cf [Reynold Xin] Updated Python tests.
2015-07-01 21:14:13 -07:00
Reynold Xin 3a342dedc0 Revert "[SPARK-8770][SQL] Create BinaryOperator abstract class."
This reverts commit 2727789998.
2015-07-01 16:59:39 -07:00
Reynold Xin 2727789998 [SPARK-8770][SQL] Create BinaryOperator abstract class.
Our current BinaryExpression abstract class is not for generic binary expressions, i.e. it requires left/right children to have the same type. However, due to its name, contributors build new binary expressions that don't have that assumption (e.g. Sha) and still extend BinaryExpression.

This patch creates a new BinaryOperator abstract class, and update the analyzer o only apply type casting rule there. This patch also adds the notion of "prettyName" to expressions, which defines the user-facing name for the expression.

Author: Reynold Xin <rxin@databricks.com>

Closes #7170 from rxin/binaryoperator and squashes the following commits:

51264a5 [Reynold Xin] [SPARK-8770][SQL] Create BinaryOperator abstract class.
2015-07-01 16:56:48 -07:00
Davies Liu 3083e17645 [QUICKFIX] [SQL] fix copy of generated row
copy() of generated Row doesn't check nullability of columns

Author: Davies Liu <davies@databricks.com>

Closes #7163 from davies/fix_copy and squashes the following commits:

661a206 [Davies Liu] fix copy of generated row
2015-07-01 12:39:57 -07:00
Reynold Xin fc3a6fe67f [SPARK-8749][SQL] Remove HiveTypeCoercion trait.
Moved all the rules into the companion object.

Author: Reynold Xin <rxin@databricks.com>

Closes #7147 from rxin/SPARK-8749 and squashes the following commits:

c1c6dc0 [Reynold Xin] [SPARK-8749][SQL] Remove HiveTypeCoercion trait.
2015-07-01 00:08:16 -07:00
Christian Kadner 1e1f339976 [SPARK-6785] [SQL] fix DateTimeUtils for dates before 1970
Hi Michael,
this Pull-Request is a follow-up to [PR-6242](https://github.com/apache/spark/pull/6242). I removed the two obsolete test cases from the HiveQuerySuite and deleted the corresponding golden answer files.
Thanks for your review!

Author: Christian Kadner <ckadner@us.ibm.com>

Closes #6983 from ckadner/SPARK-6785 and squashes the following commits:

ab1e79b [Christian Kadner] Merge remote-tracking branch 'origin/SPARK-6785' into SPARK-6785
1fed877 [Christian Kadner] [SPARK-6785][SQL] failed Scala style test, remove spaces on empty line DateTimeUtils.scala:61
9d8021d [Christian Kadner] [SPARK-6785][SQL] merge recent changes in DateTimeUtils & MiscFunctionsSuite
b97c3fb [Christian Kadner] [SPARK-6785][SQL] move test case for DateTimeUtils to DateTimeUtilsSuite
a451184 [Christian Kadner] [SPARK-6785][SQL] fix DateTimeUtils.fromJavaDate(java.util.Date) for Dates before 1970
2015-06-30 12:22:34 -07:00
Shilei 722aa5f48e [SPARK-8236] [SQL] misc functions: crc32
https://issues.apache.org/jira/browse/SPARK-8236

Author: Shilei <shilei.qian@intel.com>

Closes #7108 from qiansl127/Crc32 and squashes the following commits:

5477352 [Shilei] Change to AutoCastInputTypes
5f16e5d [Shilei] Add misc function crc32
2015-06-30 09:49:58 -07:00
Wenchen Fan 08fab48438 [SPARK-8590] [SQL] add code gen for ExtractValue
TODO:  use array instead of Seq as internal representation for `ArrayType`

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #6982 from cloud-fan/extract-value and squashes the following commits:

e203bc1 [Wenchen Fan] address comments
4da0f0b [Wenchen Fan] some clean up
f679969 [Wenchen Fan] fix bug
e64f942 [Wenchen Fan] remove generic
e3f8427 [Wenchen Fan] fix style and address comments
fc694e8 [Wenchen Fan] add code gen for extract value
2015-06-30 07:58:49 -07:00
Davies Liu ed359de595 [SPARK-8579] [SQL] support arbitrary object in UnsafeRow
This PR brings arbitrary object support in UnsafeRow (both in grouping key and aggregation buffer).

Two object pools will be created to hold those non-primitive objects, and put the index of them into UnsafeRow. In order to compare the grouping key as bytes, the objects in key will be stored in a unique object pool, to make sure same objects will have same index (used as hashCode).

For StringType and BinaryType, we still put them as var-length in UnsafeRow when initializing for better performance. But for update, they will be an object inside object pools (there will be some garbages left in the buffer).

BTW: Will create a JIRA once issue.apache.org is available.

cc JoshRosen rxin

Author: Davies Liu <davies@databricks.com>

Closes #6959 from davies/unsafe_obj and squashes the following commits:

5ce39da [Davies Liu] fix comment
5e797bf [Davies Liu] Merge branch 'master' of github.com:apache/spark into unsafe_obj
5803d64 [Davies Liu] fix conflict
461d304 [Davies Liu] Merge branch 'master' of github.com:apache/spark into unsafe_obj
2f41c90 [Davies Liu] Merge branch 'master' of github.com:apache/spark into unsafe_obj
b04d69c [Davies Liu] address comments
4859b80 [Davies Liu] fix comments
f38011c [Davies Liu] add a test for grouping by decimal
d2cf7ab [Davies Liu] add more tests for null checking
71983c5 [Davies Liu] add test for timestamp
e8a1649 [Davies Liu] reuse buffer for string
39f09ca [Davies Liu] Merge branch 'master' of github.com:apache/spark into unsafe_obj
035501e [Davies Liu] fix style
236d6de [Davies Liu] support arbitrary object in UnsafeRow
2015-06-29 15:59:20 -07:00
Ilya Ganelin f6fc254ec4 [SPARK-8056][SQL] Design an easier way to construct schema for both Scala and Python
I've added functionality to create new StructType similar to how we add parameters to a new SparkContext.

I've also added tests for this type of creation.

Author: Ilya Ganelin <ilya.ganelin@capitalone.com>

Closes #6686 from ilganeli/SPARK-8056B and squashes the following commits:

27c1de1 [Ilya Ganelin] Rename
467d836 [Ilya Ganelin] Removed from_string in favor of _parse_Datatype_json_value
5fef5a4 [Ilya Ganelin] Updates for type parsing
4085489 [Ilya Ganelin] Style errors
3670cf5 [Ilya Ganelin] added string to DataType conversion
8109e00 [Ilya Ganelin] Fixed error in tests
41ab686 [Ilya Ganelin] Fixed style errors
e7ba7e0 [Ilya Ganelin] Moved some python tests to tests.py. Added cleaner handling of null data type and added test for correctness of input format
15868fa [Ilya Ganelin] Fixed python errors
b79b992 [Ilya Ganelin] Merge remote-tracking branch 'upstream/master' into SPARK-8056B
a3369fc [Ilya Ganelin] Fixing space errors
e240040 [Ilya Ganelin] Style
bab7823 [Ilya Ganelin] Constructor error
73d4677 [Ilya Ganelin] Style
4ed00d9 [Ilya Ganelin] Fixed default arg
67df57a [Ilya Ganelin] Removed Foo
04cbf0c [Ilya Ganelin] Added comments for single object
0484d7a [Ilya Ganelin] Restored second method
6aeb740 [Ilya Ganelin] Style
689e54d [Ilya Ganelin] Style
f497e9e [Ilya Ganelin] Got rid of old code
e3c7a88 [Ilya Ganelin] Fixed doctest failure
a62ccde [Ilya Ganelin] Style
966ac06 [Ilya Ganelin] style checks
dabb7e6 [Ilya Ganelin] Added Python tests
a3f4152 [Ilya Ganelin] added python bindings and better comments
e6e536c [Ilya Ganelin] Added extra space
7529a2e [Ilya Ganelin] Fixed formatting
d388f86 [Ilya Ganelin] Fixed small bug
c4e3bf5 [Ilya Ganelin] Reverted to using parse. Updated parse to support long
d7634b6 [Ilya Ganelin] Reverted to fromString to properly support types
22c39d5 [Ilya Ganelin] replaced FromString with DataTypeParser.parse. Replaced empty constructor initializing a null to have it instead create a new array to allow appends to it.
faca398 [Ilya Ganelin] [SPARK-8056] Replaced default argument usage. Updated usage and code for DataType.fromString
1acf76e [Ilya Ganelin] Scala style
e31c674 [Ilya Ganelin] Fixed bug in test
8dc0795 [Ilya Ganelin] Added tests for creation of StructType object with new methods
fdf7e9f [Ilya Ganelin] [SPARK-8056] Created add methods to facilitate building new StructType objects.
2015-06-29 14:15:15 -07:00
zhichao.li 637b4eedad [SPARK-8214] [SQL] Add function hex
cc chenghao-intel  adrian-wang

Author: zhichao.li <zhichao.li@intel.com>

Closes #6976 from zhichao-li/hex and squashes the following commits:

e218d1b [zhichao.li] turn off scalastyle for non-ascii
de3f5ea [zhichao.li] non-ascii char
cf9c936 [zhichao.li] give separated buffer for each hex method
967ec90 [zhichao.li] Make 'value' as a feild of Hex
3b2fa13 [zhichao.li] tiny fix
a647641 [zhichao.li] remove duplicate null check
7cab020 [zhichao.li] tiny refactoring
35ecfe5 [zhichao.li] add function hex
2015-06-29 12:25:16 -07:00
Tarek Auel a5c2961caa [SPARK-8235] [SQL] misc function sha / sha1
Jira: https://issues.apache.org/jira/browse/SPARK-8235

I added the support for sha1. If I understood rxin correctly, sha and sha1 should execute the same algorithm, shouldn't they?

Please take a close look on the Python part. This is adopted from #6934

Author: Tarek Auel <tarek.auel@gmail.com>
Author: Tarek Auel <tarek.auel@googlemail.com>

Closes #6963 from tarekauel/SPARK-8235 and squashes the following commits:

f064563 [Tarek Auel] change to shaHex
7ce3cdc [Tarek Auel] rely on automatic cast
a1251d6 [Tarek Auel] Merge remote-tracking branch 'upstream/master' into SPARK-8235
68eb043 [Tarek Auel] added docstring
be5aff1 [Tarek Auel] improved error message
7336c96 [Tarek Auel] added type check
cf23a80 [Tarek Auel] simplified example
ebf75ef [Tarek Auel] [SPARK-8301] updated the python documentation. Removed sha in python and scala
6d6ff0d [Tarek Auel] [SPARK-8233] added docstring
ea191a9 [Tarek Auel] [SPARK-8233] fixed signatureof python function. Added expected type to misc
e3fd7c3 [Tarek Auel] SPARK[8235] added sha to the list of __all__
e5dad4e [Tarek Auel] SPARK[8235] sha / sha1
2015-06-29 11:57:19 -07:00
Liang-Chi Hsieh 24fda73811 [SPARK-8677] [SQL] Fix non-terminating decimal expansion for decimal divide operation
JIRA: https://issues.apache.org/jira/browse/SPARK-8677

Author: Liang-Chi Hsieh <viirya@gmail.com>

Closes #7056 from viirya/fix_decimal3 and squashes the following commits:

34d7419 [Liang-Chi Hsieh] Fix Non-terminating decimal expansion for decimal divide operation.
2015-06-28 14:48:44 -07:00
Davies Liu 77da5be6f1 [SPARK-8610] [SQL] Separate Row and InternalRow (part 2)
Currently, we use GenericRow both for Row and InternalRow, which is confusing because it could contain Scala type also Catalyst types.

This PR changes to use GenericInternalRow for InternalRow (contains catalyst types), GenericRow for Row (contains Scala types).

Also fixes some incorrect use of InternalRow or Row.

Author: Davies Liu <davies@databricks.com>

Closes #7003 from davies/internalrow and squashes the following commits:

d05866c [Davies Liu] fix test: rollback changes for pyspark
72878dd [Davies Liu] Merge branch 'master' of github.com:apache/spark into internalrow
efd0b25 [Davies Liu] fix copy of MutableRow
87b13cf [Davies Liu] fix test
d2ebd72 [Davies Liu] fix style
eb4b473 [Davies Liu] mark expensive API as final
bd4e99c [Davies Liu] Merge branch 'master' of github.com:apache/spark into internalrow
bdfb78f [Davies Liu] remove BaseMutableRow
6f99a97 [Davies Liu] fix catalyst test
defe931 [Davies Liu] remove BaseRow
288b31f [Davies Liu] Merge branch 'master' of github.com:apache/spark into internalrow
9d24350 [Davies Liu] separate Row and InternalRow (part 2)
2015-06-28 08:03:58 -07:00
Liang-Chi Hsieh 47c874babe [SPARK-8237] [SQL] Add misc function sha2
JIRA: https://issues.apache.org/jira/browse/SPARK-8237

Author: Liang-Chi Hsieh <viirya@gmail.com>

Closes #6934 from viirya/expr_sha2 and squashes the following commits:

35e0bb3 [Liang-Chi Hsieh] For comments.
68b5284 [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into expr_sha2
8573aff [Liang-Chi Hsieh] Remove unnecessary Product.
ee61e06 [Liang-Chi Hsieh] Merge remote-tracking branch 'upstream/master' into expr_sha2
59e41aa [Liang-Chi Hsieh] Add misc function: sha2.
2015-06-25 22:07:37 -07:00
Wenchen Fan b71d3254e5 [SPARK-8075] [SQL] apply type check interface to more expressions
a follow up of https://github.com/apache/spark/pull/6405.
Note: It's not a big change, a lot of changing is due to I swap some code in `aggregates.scala` to make aggregate functions right below its corresponding aggregate expressions.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #6723 from cloud-fan/type-check and squashes the following commits:

2124301 [Wenchen Fan] fix tests
5a658bb [Wenchen Fan] add tests
287d3bb [Wenchen Fan] apply type check interface to more expressions
2015-06-24 16:26:00 -07:00
Wenchen Fan f04b5672c5 [SPARK-7289] handle project -> limit -> sort efficiently
make the `TakeOrdered` strategy and operator more general, such that it can optionally handle a projection when necessary

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #6780 from cloud-fan/limit and squashes the following commits:

34aa07b [Wenchen Fan] revert
07d5456 [Wenchen Fan] clean closure
20821ec [Wenchen Fan] fix
3676a82 [Wenchen Fan] address comments
b558549 [Wenchen Fan] address comments
214842b [Wenchen Fan] fix style
2d8be83 [Wenchen Fan] add LimitPushDown
948f740 [Wenchen Fan] fix existing
2015-06-24 13:28:50 -07:00