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https://issues.apache.org/jira/browse/CALCITE-2985?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Forward Xu reassigned CALCITE-2985:
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Assignee: Forward Xu
> Add the JSON_STORAGE_SIZE function
> ----------------------------------
>
> Key: CALCITE-2985
> URL: https://issues.apache.org/jira/browse/CALCITE-2985
> Project: Calcite
> Issue Type: New Feature
> Reporter: Forward Xu
> Assignee: Forward Xu
> Priority: Major
>
> JSON_STORAGE_SIZE(json_val)
> This function returns the number of bytes used to store the binary
> representation of a JSON document. When the argument is a JSON column, this
> is the space used to store the JSON document. json_val must be a valid JSON
> document or a string which can be parsed as one. In the case where it is
> string, the function returns the amount of storage space in the JSON binary
> representation that is created by parsing the string as JSON and converting
> it to binary. It returns NULL if the argument is NULL.
> An error results when json_val is not NULL, and is not—or cannot be
> successfully parsed as—a JSON document.
> To illustrate this function's behavior when used with a JSON column as its
> argument, we create a table named jtable containing a JSON column jcol,
> insert a JSON value into the table, then obtain the storage space used by
> this column with JSON_STORAGE_SIZE(), as shown here:
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