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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