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### What changes were proposed in this pull request? SQL Reference cleanup ### Why are the changes needed? To complete SQL Reference ### Does this PR introduce _any_ user-facing change? updated sql-ref-syntax-qry.html before <img width="1100" alt="Screen Shot 2020-04-29 at 11 08 25 PM" src="https://user-images.githubusercontent.com/13592258/80677799-70b27280-8a6e-11ea-8e3f-a768f29d0377.png"> after <img width="1100" alt="Screen Shot 2020-04-29 at 11 05 55 PM" src="https://user-images.githubusercontent.com/13592258/80677803-74de9000-8a6e-11ea-880c-aa05c53254a6.png"> ### How was this patch tested? Manually build and check Closes #28417 from huaxingao/cleanup. Authored-by: Huaxin Gao <huaxing@us.ibm.com> Signed-off-by: Takeshi Yamamuro <yamamuro@apache.org>
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layout | title | displayTitle | license |
---|---|---|---|
global | INSERT OVERWRITE DIRECTORY with Hive format | INSERT OVERWRITE DIRECTORY with Hive format | Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. |
Description
The INSERT OVERWRITE DIRECTORY
with Hive format overwrites the existing data in the directory with the new values using Hive SerDe
.
Hive support must be enabled to use this command. The inserted rows can be specified by value expressions or result from a query.
Syntax
{% highlight sql %} INSERT OVERWRITE [ LOCAL ] DIRECTORY directory_path [ ROW FORMAT row_format ] [ STORED AS file_format ] { VALUES ( { value | NULL } [ , ... ] ) [ , ( ... ) ] | query } {% endhighlight %}
Parameters
directory_path
-
Specifies the destination directory. The
LOCAL
keyword is used to specify that the directory is on the local file system.
row_format
-
Specifies the row format for this insert. Valid options are
SERDE
clause andDELIMITED
clause.SERDE
clause can be used to specify a customSerDe
for this insert. Alternatively,DELIMITED
clause can be used to specify the nativeSerDe
and state the delimiter, escape character, null character, and so on.
file_format
-
Specifies the file format for this insert. Valid options are
TEXTFILE
,SEQUENCEFILE
,RCFILE
,ORC
,PARQUET
, andAVRO
. You can also specify your own input and output format usingINPUTFORMAT
andOUTPUTFORMAT
.ROW FORMAT SERDE
can only be used withTEXTFILE
,SEQUENCEFILE
, orRCFILE
, whileROW FORMAT DELIMITED
can only be used withTEXTFILE
.
VALUES ( { value | NULL } [ , ... ] ) [ , ( ... ) ]
- Specifies the values to be inserted. Either an explicitly specified value or a NULL can be inserted. A comma must be used to separate each value in the clause. More than one set of values can be specified to insert multiple rows.
query
- A query that produces the rows to be inserted. It can be in one of following formats:
- a
SELECT
statement - a
TABLE
statement - a
FROM
statement
- a
Examples
{% highlight sql %} INSERT OVERWRITE LOCAL DIRECTORY '/tmp/destination' STORED AS orc SELECT * FROM test_table;
INSERT OVERWRITE LOCAL DIRECTORY '/tmp/destination' ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' SELECT * FROM test_table; {% endhighlight %}