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https://issues.apache.org/jira/browse/CALCITE-5772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17735608#comment-17735608
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jackylau commented on CALCITE-5772:
-----------------------------------
hi [~julianhyde] do you have time to help review?
> Add MAP_CONCAT, MAP_FROM_ENTRIES for Spark dialect
> ---------------------------------------------------
>
> Key: CALCITE-5772
> URL: https://issues.apache.org/jira/browse/CALCITE-5772
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.35.0
> Reporter: jackylau
> Assignee: jackylau
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.35.0
>
>
> h3.
> [map_concat|https://spark.apache.org/docs/latest/api/sql/index.html#map_concat]
> map_concat(map, ...) - Returns the union of all the given maps
> *Examples:*
>
> {code:java}
> > SELECT map_concat(map(1, 'a', 2, 'b'), map(3, 'c'));
> {1:"a",2:"b",3:"c"} {code}
>
>
> h3.
> [map_from_entries|https://spark.apache.org/docs/latest/api/sql/index.html#map_from_entries]
> map_from_entries(arrayOfEntries) - Returns a map created from the given array
> of entries.
> *Examples:*
>
> {code:java}
> > SELECT map_from_entries(array(struct(1, 'a'), struct(2, 'b')));
> {1:"a",2:"b"} {code}
>
>
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