DonnyZone commented on a change in pull request #1862: [CALCITE-3864] Add Implementation for SqlLibraryOperators.CONCAT_FUNCTION in SqlFunctions and correct the return type inference of SqlLibraryOperators.CONCAT_FUNCTION URL: https://github.com/apache/calcite/pull/1862#discussion_r397713213
########## File path: core/src/main/java/org/apache/calcite/adapter/enumerable/RexImpTable.java ########## @@ -332,6 +334,8 @@ NullPolicy.STRICT); defineMethod(CONCAT, BuiltInMethod.STRING_CONCAT.method, NullPolicy.STRICT); + defineMethod(CONCAT2, BuiltInMethod.STRING_CONCAT.method, NullPolicy.STRICT); Review comment: Maybe there is no need to register `CONCAT2` into `RexImpTable`. In runtime, Calcite can automatically find the concat function. You can have a try. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services