Github user adrian-wang commented on the pull request:
https://github.com/apache/spark/pull/4930#issuecomment-82746886
we should substitute variables in hql to pass the text to parseSql() as a
parameter. Hive parser need substituted text. HiveContext.sql() does this but
return a DataFrame, while we need a logicalPlan so we cannot reuse that.
Added as comment.
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