[jira] [Created] (SPARK-12725) SQL generation suffers from name conficts introduced by some analysis rules

["Cheng Lian (JIRA)" <ji...@apache.org>]

Cheng Lian created SPARK-12725:
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             Summary: SQL generation suffers from name conficts introduced by some analysis rules
                 Key: SPARK-12725
                 URL: https://issues.apache.org/jira/browse/SPARK-12725
             Project: Spark
          Issue Type: Sub-task
            Reporter: Cheng Lian


Some analysis rules generate auxiliary attribute references with the same name but different expression IDs. For example, {{ResolveAggregateFunctions}} introduces {{havingCondition}} and {{aggOrder}}, and {{DistinctAggregationRewriter}} introduces {{gid}}.

This is OK for normal query execution since these attribute references get expression IDs. However, it's troublesome when converting resolved query plans back to SQL query strings since expression IDs are erased.



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