Jiang Xingbo created SPARK-18063:
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Summary: Failed to infer constraints over multiple aliases
Key: SPARK-18063
URL: https://issues.apache.org/jira/browse/SPARK-18063
Project: Spark
Issue Type: Bug
Components: SQL
Reporter: Jiang Xingbo
Priority: Minor
The `UnaryNode.getAliasedConstraints` function fails to replace all expressions
by their alias where constraints contains more than one expression to be
replaced. For example:
{code}
val tr = LocalRelation('a.int, 'b.string, 'c.int)
val multiAlias = tr.where('a === 'c + 10).select('a.as('x), 'c.as('y))
multiAlias.analyze.constraints
{code}
currently outputs:
{code}
ExpressionSet(Seq(
IsNotNull(resolveColumn(multiAlias.analyze, "x")),
IsNotNull(resolveColumn(multiAlias.analyze, "y"))
)
{code}
The constraint {code}resolveColumn(multiAlias.analyze, "x") ===
resolveColumn(multiAlias.analyze, "y") + 10){code} is missing.
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