wenhuitang edited a comment on issue #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#issuecomment-603174424 > hi @wenhuitang In addition, you need to add function docs. The description of CONCAT(string [, string ]*) has already existed in Line 2325 of the document reference.md
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