Github user scwf commented on a diff in the pull request:
https://github.com/apache/spark/pull/4812#discussion_r27392069
--- Diff: sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala ---
@@ -619,10 +619,26 @@
https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
case Some(f) => nodeToRelation(f)
case None => NoRelation
}
-
+
+ val not = "(?i)not".r
+ val exists = "(?i)exists".r
+
val withWhere = whereClause.map { whereNode =>
- val Seq(whereExpr) = whereNode.getChildren.toSeq
- Filter(nodeToExpr(whereExpr), relations)
+ val Seq(clause) = whereNode.getChildren.toSeq
+ clause match {
+ case Token(not(),
+ Token("TOK_SUBQUERY_EXPR",
+ Token("TOK_SUBQUERY_OP", Token(exists(), Nil) :: Nil)
::
+ subquery :: Nil) :: Nil) =>
+ Exists(relations, nodeToPlan(subquery), false)
+ case Token("TOK_SUBQUERY_EXPR",
+ Token("TOK_SUBQUERY_OP", Token(exists(), Nil) :: Nil) ::
+ subquery :: Nil) =>
+ Exists(relations, nodeToPlan(subquery), true)
+ // TODO add IN and NOT IN
+ case whereExpr =>
+ Filter(nodeToExpr(whereExpr), relations)
+ }
--- End diff --
Seems this do not support sql with both predicts and exists in where clause:
```
select *
from src b
where
(not exists
(select a.key
from src a
where b.value = a.value and a.key = b.key and a.value > 'val_2'
)
) and key > 1
;
```
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