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https://issues.apache.org/jira/browse/SPARK-16217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Herman van Hovell updated SPARK-16217:
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Target Version/s: 2.1.0
> Support SELECT INTO statement
> -----------------------------
>
> Key: SPARK-16217
> URL: https://issues.apache.org/jira/browse/SPARK-16217
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: GuangFancui(ISCAS)
>
> The *SELECT INTO* statement selects data from one table and inserts it into a
> new table as follows.
> {code:sql}
> SELECT column_name(s)
> INTO newtable
> FROM table1;
> {code}
> This statement is commonly used in SQL but not currently supported in
> SparkSQL.
> We investigated the Catalyst and found that this statement can be implemented
> by improving the grammar and reusing the logical plan of *CREAT TABLE AS
> SELECT* as follows.
> # Improve grammar: Add _INTO tableIdentifier_ to _SELECT ... FROM_ in
> _querySpecification_ grammar in SqlBase.g4 file.
> !https://raw.githubusercontent.com/wuxianxingkong/storage/master/selectinto_g4.png!
> For example
> {code:sql}
> SELECT *
> INTO NEW_TABLE
> FROM OLD_TABLE
> {code}
> Then the grammar tree will be:
> !https://raw.githubusercontent.com/wuxianxingkong/storage/master/selectinto_tree.png!
> Furthermore, we can argue whether it's necessary to add _INTO_ to _TRANSFORM_
> in _querySpecification_
> # Add new logicalplan: _SelectIntoLogicalPlan_
> # Identify _SELECT INTO_ in the Parser: Modify _withQuerySpecification_
> function. If there is _INTO tableIdentifier_, we can change it to
> _SelectIntoLogicalPlan_ with _withSelectInto_（custom function).
> # Conversion in Analyzer: Convert _SelectIntoLogicalPlan_ to
> _CreateTableAsSelectCommand_ by adding a rule in the Analyzer.
> *Hive support* should be opened since _CreateTableAsSelectCommand_ relies on
> it.
> We’ve implemented and tested the above approach. If possible, we can make
> some pull requests.
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