meazza commented on issue #5480: SQL: not in operator can cause NullPointerException URL: https://github.com/apache/incubator-druid/issues/5480#issuecomment-412438737 ``` { "error": "Unknown exception", "errorMessage": "Cannot build plan for query: SELECT COUNT(*) AS TheCount FROM data_source where dt='2018-01-01' AND biz_line NOT IN (select biz_line from data_source where dt='2018-01-01')", "errorClass": "io.druid.java.util.common.ISE", "host": null } ``` it seems return 500 ISE now, is there a plan to support this feature: not in sub-query expression. If it's necessary, I'd like to contribute to this feature. @gianm
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