MaxGekk commented on issue #26438: [SPARK-29408][SQL] Support sign before `interval` in interval literals URL: https://github.com/apache/spark/pull/26438#issuecomment-552171915 While comparing to PostgreSQL, I have found it doesn't support '+' before interval: ```sql maxim=# select +interval '-1 month 1 day -1 second'; ERROR: operator does not exist: + interval LINE 1: select +interval '-1 month 1 day -1 second'; ^ HINT: No operator matches the given name and argument type. You might need to add an explicit type cast. ``` @dongjoon-hyun Shall I support only `-`? or `+` is ok too?
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