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https://issues.apache.org/jira/browse/CALCITE-2791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16753276#comment-16753276
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Hongze Zhang commented on CALCITE-2791:
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{quote}do you think this JSON_TYPE function can be implemented against mysql
{quote}
Personally I think MySQL's JSON functions can be useful, I can make some review
comments if you want.
> Add the JSON_TYPE function
> --------------------------
>
> Key: CALCITE-2791
> URL: https://issues.apache.org/jira/browse/CALCITE-2791
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: xuqianjin
> Assignee: Julian Hyde
> Priority: Major
> Labels: https://github.com/apache/calcite/pull/1013
>
> The data in json can be =, <, <=, >, >=, <>,! =, and <=>. But the data types
> in json can be diverse, so when you compare different types, you have a
> priority, and the high priority is greater than the low priority (you can
> view the types with the JSON_TYPE() function). The priorities are as follows:
> BOOLEAN
> ARRAY
> OBJECT
> STRING
> INTEGER
> LONG
> DOUBLE
> NULL
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