francis0407 commented on a change in pull request #23783: [SPARK-26854][SQL]
Support ANY/SOME subquery
URL: https://github.com/apache/spark/pull/23783#discussion_r257458948
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
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@@ -1148,6 +1165,12 @@ class AstBuilder(conf: SQLConf) extends
SqlBaseBaseVisitor[AnyRef] with Logging
EqualNullSafe(e, expression(ctx.right))
case SqlBaseParser.DISTINCT =>
Not(EqualNullSafe(e, expression(ctx.right)))
+ case SqlBaseParser.ANY | SqlBaseParser.SOME =>
+ invertIfNotDefined(AnySubquery(
+ getValueExpressions(e),
+ getComparisonOperator(
+
ctx.comparisonOperator.getChild(0).asInstanceOf[TerminalNode].getSymbol.getType),
+ ListQuery(plan(ctx.query))))
Review comment:
Another solution is that we can parse `x != ANY(query)` to
`Not(AnySubquery(a, EqualTo, query))`, so that we can keep the `comparison` as
type `(Expression, Expresson) => BinaryComparison`
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