1.3 KiB
1.3 KiB
title, language
| title | language |
|---|---|
| outer combinator | en |
outer combinator
description
Adding the _outer suffix after the function name of the table function changes the function behavior from non-outer to outer, and adds a row of Null data when the table function generates 0 rows of data.
example
mysql> select e1 from (select 1 k1) as t lateral view explode_numbers(0) tmp1 as e1;
Empty set
mysql> select e1 from (select 1 k1) as t lateral view explode_numbers_outer(0) tmp1 as e1;
+------+
| e1 |
+------+
| NULL |
+------+
keyword
outer