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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