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Posted to issues@calcite.apache.org by "ZheHu (Jira)" <ji...@apache.org> on 2023/05/04 09:35:00 UTC

[jira] [Created] (CALCITE-5685) Support MySQL CONVERT function that works on data types

ZheHu created CALCITE-5685:
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             Summary: Support MySQL CONVERT function that works on data types
                 Key: CALCITE-5685
                 URL: https://issues.apache.org/jira/browse/CALCITE-5685
             Project: Calcite
          Issue Type: Improvement
          Components: core
    Affects Versions: 1.34.0
            Reporter: ZheHu
            Assignee: ZheHu


CONVERT function in MySQL has two usage：
 # convert(s USING transcodingName): as described in [CALCITE-5664|https://issues.apache.org/jira/projects/CALCITE/issues/CALCITE-5664]
 # convert(value, type): equivalent to CAST function that converts value to specific type.

Here are some examples:
 * convert(150, CHAR)
 * convert(now(), DATE)
 * convert('9.5', DECIMAL(10, 2))

Noted: for CONVERT or CAST function in MySQL, they only support converting to some specific date types(binary、char、date、time、datetime、decimal、signed、unsigned).

 



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