Dongjoon Hyun created SPARK-16756:
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Summary: Add `sql` function to LogicalPlan and `NonSQLPlan` trait
Key: SPARK-16756
URL: https://issues.apache.org/jira/browse/SPARK-16756
Project: Spark
Issue Type: Sub-task
Components: SQL
Reporter: Dongjoon Hyun
Like `Expression`, this issue adds `sql` function for `LogicalPlan` and
`NonSQLPlan` trait. The method will be `abstract` method. All logical plan
should implement that or use trait `NonSQLPlan` explicitly.
{code}
/**
* Returns SQL representation of this plan. For the plans extending
[[NonSQLPlan]],
* this method may return an arbitrary user facing string.
*/
def sql: String
{code}
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