Github user hvanhovell commented on a diff in the pull request: https://github.com/apache/spark/pull/17711#discussion_r112628499 --- Diff: sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 --- @@ -547,6 +547,10 @@ valueExpression | left=valueExpression comparisonOperator right=valueExpression #comparison ; +builtinOpExpression + : primaryExpression (CONCAT_PIPE primaryExpression)* #concat --- End diff -- Should we move this to the head of the primaryExpression rule? That seems easier. I am also trying to figure how this works with other binary operators, for example: `a + b || c`.
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