ARRAY_MATCH_ALL

Description

Returns true if all elements in the array match the given condition, false otherwise. If the array contains NULL elements and all non-NULL elements match the condition, returns NULL.

Syntax

array_match_all(lambda, <arr> [, <arr> ...])

Parameters

• lambda: A lambda expression that defines the condition to check for each element
• <arr>: One or more arrays to check. The lambda function will be applied to each element of these arrays

Return value

Returns a nullable boolean value:

• true if all elements in the array match the condition
• false if any element in the array does not match the condition
• NULL if the array contains NULL elements and all non-NULL elements match the condition

Examples

-- Check if all numbers in array are greater than 5
mysql> SELECT array_match_all(x -> x > 5, [1, 2, 3, 4, 7]);
+----------------------------------------------+
| array_match_all(x -> x > 5, [1, 2, 3, 4, 7]) |
+----------------------------------------------+
|                                            0 |
+----------------------------------------------+

-- Check if all numbers in array are greater than corresponding numbers in another array
mysql> SELECT array_match_all((x, i) -> x > i, [1, 2, 3, 4, 5], [1, 2, 3, 4, 7]);
+--------------------------------------------------------------------+
| array_match_all((x, i) -> x > i, [1, 2, 3, 4, 5], [1, 2, 3, 4, 7]) |
+--------------------------------------------------------------------+
|                                                                  0 |
+--------------------------------------------------------------------+

Notes

1. The function handles NULL values in the following way:

   • If there are NULL elements and all non-NULL elements match the condition, returns NULL
   • If any non-NULL element does not match the condition, returns false regardless of NULL elements

2. This function is useful for:

   • Validating all elements in an array meet certain criteria
   • Combining with other array functions for complex array operations