Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/14132#discussion_r70223712
--- Diff:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 ---
@@ -347,6 +347,14 @@ querySpecification
windows?)
;
+hint
+ : '/*+' mapJoinHint '*/'
+ ;
+
+mapJoinHint
+ : MAPJOIN '(' broadcastedTables+=tableIdentifier (','
broadcastedTables+=tableIdentifier)* ')'
--- End diff --
Is the MAPJOIN optimization the only one we are going to support? This is
fine if we aren't. We might want to make this more general (and move the logic
into the planner) if we are.
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