[jira] [Closed] (FLINK-27891) Add ARRAY_APPEND and ARRAY_PREPEND supported in SQL & Table API

["Sergey Nuyanzin (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-27891?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Nuyanzin closed FLINK-27891.
-----------------------------------

> Add ARRAY_APPEND and ARRAY_PREPEND supported in SQL & Table API
> ---------------------------------------------------------------
>
>                 Key: FLINK-27891
>                 URL: https://issues.apache.org/jira/browse/FLINK-27891
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / API
>            Reporter: Sergey Nuyanzin
>            Assignee: Sergey Nuyanzin
>            Priority: Major
>              Labels: pull-request-available, stale-assigned
>             Fix For: 1.20.0
>
>
> {{ARRAY_APPEND}} - adds element to the end of the array and returns the resulting array
> {{ARRAY_PREPEND}} - adds element to the beginning of the array and returns the resulting array
> Syntax:
> {code:sql}
> ARRAY_APPEND( <array> , <new_element> );
> ARRAY_PREPEND( <new_element> , <array> );
> {code}
> Arguments:
> array: An ARRAY to to add a new element.
> new_element: A new element.
> Returns:
> An array. If array is NULL, the result is NULL.
> Examples:
> {code:sql}
> SELECT array_append(array[1, 2, 3], 4);
> -- array[1, 2, 3, 4]
> select array_append(cast(null as int array), 2);
> -- null
> SELECT array_prepend(4, array[1, 2, 3]);
> -- array[4, 1, 2, 3]
> SELECT array_prepend(null, array[1, 2, 3]);
> -- array[null, 1, 2, 3]
> {code}
> See more:
> {{ARRAY_APPEND}}
> Snowflake [https://docs.snowflake.com/en/sql-reference/functions/array_append.html]
> PostgreSQL [https://www.postgresql.org/docs/14/functions-array.html#ARRAY-FUNCTIONS-TABLE]
> {{ARRAY_PREPEND}}
> Snowflake [https://docs.snowflake.com/en/sql-reference/functions/array_prepend.html]
> PostgreSQL [https://www.postgresql.org/docs/14/functions-array.html#ARRAY-FUNCTIONS-TABLE]



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