jingshanglu commented on issue #3290: fix g4 for assignmentValueNode get error by index URL: https://github.com/apache/incubator-shardingsphere/pull/3290#issuecomment-542592442 > That maybe not enough because the expression may `values(xx) + values(xx)`. > So `VALUES` should be a part of expr ``` assignmentRight_ : VALUES LP_ assignmentValue RP_ | assignmentValue ; setAssignmentsClause : SET assignment (COMMA_ assignment)* ; assignmentValues : LP_ assignmentValue (COMMA_ assignmentValue)* RP_ | LP_ RP_ ; assignmentValue : expr | DEFAULT | blobValue ; ``` assignmentValue may be expr
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