Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/11106#discussion_r52121128
--- Diff:
sql/catalyst/src/main/antlr3/org/apache/spark/sql/catalyst/parser/SparkSqlParser.g
---
@@ -2222,7 +2223,9 @@ setOperator
: KW_UNION KW_ALL -> ^(TOK_UNIONALL)
| KW_UNION KW_DISTINCT? -> ^(TOK_UNIONDISTINCT)
| KW_EXCEPT -> ^(TOK_EXCEPT)
- | KW_INTERSECT -> ^(TOK_INTERSECT)
+ | KW_INTERSECT (all=KW_ALL | distinct=KW_DISTINCT)?
+ -> {$all == null}? ^(TOK_INTERSECTDISTINCT)
+ -> ^(TOK_INTERSECTALL)
--- End diff --
Yeah, the default behavior of `INTERSECT` is `INTERSECT DISTINCT`.
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