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https://issues.apache.org/jira/browse/SPARK-16370?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated SPARK-16370:
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Description:
Currently, some queries having side effects like `Command`, `InsertIntoTable`,
and `CreateTableUsingAsSelect` are executed eagerly.
However, it matches `UNION` queries some cases. This issue prevents `UNION`
eager execution except `MULTI-INSERT` syntax.
was:
Currently, some queries having side effects like `Command`, `InsertIntoTable`,
and `CreateTableUsingAsSelect` are executed eagerly.
However, for `UNION` queries, they are executed only in `UNION ALL` queries
with all children having side effects.
This issue executes them eagerly for both `UNION` and `UNION ALL` queries if
one of their children has side effects.
Summary: Union queries should not be executed eagerly (was: Union
queries with side effects should be executed eagerly)
> Union queries should not be executed eagerly
> --------------------------------------------
>
> Key: SPARK-16370
> URL: https://issues.apache.org/jira/browse/SPARK-16370
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Dongjoon Hyun
>
> Currently, some queries having side effects like `Command`,
> `InsertIntoTable`, and `CreateTableUsingAsSelect` are executed eagerly.
> However, it matches `UNION` queries some cases. This issue prevents `UNION`
> eager execution except `MULTI-INSERT` syntax.
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