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Posted to dev@flink.apache.org by "jackylau (Jira)" <ji...@apache.org> on 2023/02/16 04:08:00 UTC

[jira] [Created] (FLINK-31098) Add ARRAY_SIZE supported in SQL & Table API

jackylau created FLINK-31098:
--------------------------------

             Summary: Add ARRAY_SIZE supported in SQL & Table API
                 Key: FLINK-31098
                 URL: https://issues.apache.org/jira/browse/FLINK-31098
             Project: Flink
          Issue Type: New Feature
          Components: Table SQL / Planner
    Affects Versions: 1.18.0
            Reporter: jackylau
             Fix For: 1.18.0


Returns the size of an array.

Syntax:
array_size(array)

Arguments:
array: An ARRAY to be handled.

Returns:

An ARRAY. If value is NULL, the result is NULL. 
Examples:
{code:sql}
SELECT array_size(ARRAY[1, 2, 3, 2, 1]);
-- 5
SELECT array_size(ARRAY[1, NULL, 1]);
-- 3
{code}
See also
spark [https://spark.apache.org/docs/latest/api/sql/index.html#array_size]

snowflake https://docs.snowflake.com/en/sql-reference/functions/array_size
h4.



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