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Max Gekk 75d342858a [SPARK-32209][SQL] Re-use GetTimestamp in ParseToDate 
### What changes were proposed in this pull request?
Replace the combination of expressions `SecondsToTimestamp` and `UnixTimestamp` by `GetTimestamp` in `ParseToDate`.

### Why are the changes needed?
Eliminate unnecessary parsing overhead in: **string -> timestamp -> long (seconds) -> timestamp -> date**. After the changes, the chain will be: **string -> timestamp -> date**.

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?
By existing test suites such as `DateFunctionsSuite`.

Closes #28999 from MaxGekk/ParseToDate-parse-timestamp.

Authored-by: Max Gekk <max.gekk@gmail.com>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>
2020-07-07 07:26:40 -07:00
..
catalyst [SPARK-32209][SQL] Re-use GetTimestamp in ParseToDate 2020-07-07 07:26:40 -07:00
core [SPARK-32167][SQL] Fix GetArrayStructFields to respect inner field's nullability together 2020-07-06 20:07:33 -07:00
hive [SPARK-32156][SPARK-31061][TESTS][SQL] Refactor two similar test cases from in HiveExternalCatalogSuite 2020-07-02 10:15:10 -07:00
hive-thriftserver [SPARK-32145][SQL][TEST-HIVE1.2][TEST-HADOOP2.7] ThriftCLIService.GetOperationStatus should include exception's stack trace to the error message 2020-07-06 10:34:31 +00:00
create-docs.sh [SPARK-31550][SQL][DOCS] Set nondeterministic configurations with general meanings in sql configuration doc 2020-04-27 17:08:52 +09:00
gen-sql-api-docs.py [SPARK-31474][SQL][FOLLOWUP] Replace _FUNC_ placeholder with functionname in the note field of expression info 2020-04-23 13:33:04 +09:00
gen-sql-config-docs.py [SPARK-31550][SQL][DOCS] Set nondeterministic configurations with general meanings in sql configuration doc 2020-04-27 17:08:52 +09:00
gen-sql-functions-docs.py [SPARK-31562][SQL] Update ExpressionDescription for substring, current_date, and current_timestamp 2020-04-26 11:46:52 -07:00
mkdocs.yml [SPARK-30731] Update deprecated Mkdocs option 2020-02-19 17:28:58 +09:00
README.md [SPARK-30510][SQL][DOCS] Publicly document Spark SQL configuration options 2020-02-09 19:20:47 +09:00

README.md

Spark SQL

This module provides support for executing relational queries expressed in either SQL or the DataFrame/Dataset API.

Spark SQL is broken up into four subprojects:

  • Catalyst (sql/catalyst) - An implementation-agnostic framework for manipulating trees of relational operators and expressions.
  • Execution (sql/core) - A query planner / execution engine for translating Catalyst's logical query plans into Spark RDDs. This component also includes a new public interface, SQLContext, that allows users to execute SQL or LINQ statements against existing RDDs and Parquet files.
  • Hive Support (sql/hive) - Includes extensions that allow users to write queries using a subset of HiveQL and access data from a Hive Metastore using Hive SerDes. There are also wrappers that allow users to run queries that include Hive UDFs, UDAFs, and UDTFs.
  • HiveServer and CLI support (sql/hive-thriftserver) - Includes support for the SQL CLI (bin/spark-sql) and a HiveServer2 (for JDBC/ODBC) compatible server.

Running ./sql/create-docs.sh generates SQL documentation for built-in functions under sql/site, and SQL configuration documentation that gets included as part of configuration.md in the main docs directory.