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https://issues.apache.org/jira/browse/FLINK-31665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17731607#comment-17731607
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Mara Steiu commented on FLINK-31665:
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I personally think that ARRAY_CONCAT is most intuitive option and the fact that
other vendors like BQ use it also helps.
> Add ARRAY_CONCAT supported in SQL & Table API
> ---------------------------------------------
>
> Key: FLINK-31665
> URL: https://issues.apache.org/jira/browse/FLINK-31665
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Planner
> Affects Versions: 1.18.0
> Reporter: jackylau
> Assignee: Hanyu Zheng
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.18.0
>
>
> This is an implementation of ARRAY_CONCEPT
> The array_concat() function concatenates at least one array, creating an
> array that contains all the elements in the first array followed by all the
> elements in the second array ... followed by all the elements in the n array.
> h3. Brief change log
> ARRAY_CONCAT for Table API and SQL
> Syntax:
> {code:java}
> ARRAY_CONCAT(arr1, tail...){code}
> Arguments:
> array: at least one ARRAY to be handled.
> Returns:
> The function returns NULL if any input argument is NULL.
> Examples:
> {code:java}
> Flink SQL> SELECT array_concat(array[1, 2, 3, null, 3], array[3], array[5]);
> [1, 2, 3, null, 3, 3]{code}
> see also:
> Google Cloud BigQuery:
> [https://cloud.google.com/bigquery/docs/reference/standard-sql/array_functions#array_concat]
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