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https://issues.apache.org/jira/browse/CALCITE-2975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16841347#comment-16841347
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Hongze Zhang commented on CALCITE-2975:
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Changed the title to "Implement JSON_REMOVE function". We can use the word
"implement" in future issues/PRs.
> Implement JSON_REMOVE function
> ------------------------------
>
> Key: CALCITE-2975
> URL: https://issues.apache.org/jira/browse/CALCITE-2975
> Project: Calcite
> Issue Type: Sub-task
> Reporter: Forward Xu
> Assignee: Forward Xu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> JSON_REMOVE(json_doc, path[, path] ...)
> Removes data from a JSON document and returns the result. Returns NULL if any
> argument is NULL. An error occurs if the json_doc argument is not a valid
> JSON document or any path argument is not a valid path expression or is $ or
> contains a * or ** wildcard.
> The path arguments are evaluated left to right. The document produced by
> evaluating one path becomes the new value against which the next path is
> evaluated.
> It is not an error if the element to be removed does not exist in the
> document; in that case, the path does not affect the document.
> JSON_REMOVE SQL:
> {code:java}
> SELECT JSON_REMOVE(v, '$[1]') AS c1
> FROM (VALUES ('["a", ["b", "c"], "d"]')) AS t(v);
> {code}
> RESULT:
> ||c1||
> |["a", "d"]|
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