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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2021/06/07 01:46:30 UTC

[GitHub] [iotdb] SteveYurongSu commented on issue #3362: Implement regex matching operator

SteveYurongSu commented on issue #3362:
URL: https://github.com/apache/iotdb/issues/3362#issuecomment-855520425


   @liujiajun Nice to see you here again! ❤️
   
   Several points need to be considered:
   1. What are the grammers in other db systems? Which grammer is better? Why?
   2. We have already implemented a user-defined function called `STRING_CONTAINS` (see https://iotdb.apache.org/UserGuide/Master/IoTDB-SQL-Language/DML-Data-Manipulation-Language.html#string-processing-functions). Can those udf operators be reused in `where` clauses?


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