gatorsmile commented on a change in pull request #25626: [SPARK-28892][SQL] Add
UPDATE support for DataSource V2
URL: https://github.com/apache/spark/pull/25626#discussion_r319738668
##########
File path:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
##########
@@ -474,6 +475,14 @@ selectClause
: SELECT (hints+=hint)* setQuantifier? namedExpressionSeq
;
+setClause
+ : SET assign (',' assign)*
+ ;
+
+assign
+ : key=multipartIdentifier EQ value=valueExpression
Review comment:
valueExpression -> expression.
Although we do not support subqueries, we should make the parser support it
and issue an exception in the analyzer.
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