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Posted to dev@flink.apache.org by "Ingo Bürk (Jira)" <ji...@apache.org> on 2021/10/19 07:25:00 UTC

[jira] [Created] (FLINK-24586) SQL functions should return STRING instead of VARCHAR(2000)

Ingo Bürk created FLINK-24586:
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             Summary: SQL functions should return STRING instead of VARCHAR(2000)
                 Key: FLINK-24586
                 URL: https://issues.apache.org/jira/browse/FLINK-24586
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / API
            Reporter: Ingo Bürk


There are some SQL functions which currently return VARCHAR(2000). With more strict CAST behavior from FLINK-24413, this could become an issue.

The following functions return VARCHAR(2000) and should be changed to return STRING instead:
* JSON_VALUE
* JSON_QUERY
* JSON_OBJECT
* JSON_ARRAY

There are also some more functions which should be evaluated:
* CHR
* REVERSE
* SPLIT_INDEX
* PARSE_URL
* FROM_UNIXTIME
* DECODE



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