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Posted to issues@spark.apache.org by "Ted Yu (Jira)" <ji...@apache.org> on 2020/12/26 04:01:00 UTC

[jira] [Created] (SPARK-33915) Allow json expression to be pushable column

Ted Yu created SPARK-33915:
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             Summary: Allow json expression to be pushable column
                 Key: SPARK-33915
                 URL: https://issues.apache.org/jira/browse/SPARK-33915
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 3.0.1
            Reporter: Ted Yu


Currently PushableColumnBase provides no support for json / jsonb expression.

Example of json expression:
get_json_object(phone, '$.code') = '1200'

If non-string literal is part of the expression, the presence of cast() would complicate the situation.

Implication is that implementation of SupportsPushDownFilters doesn't have a chance to perform pushdown even if third party DB engine supports json expression pushdown.

This issue is for discussion and implementation of Spark core changes which would allow json expression to be recognized as pushable column.



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