countequal
countequal
countequal
description
Syntax
BIGINT countequal(ARRAY<T> arr, T value)
Returns a number of the value in the given array.
num - how many the value number in array;
0 - if value does not present in the array;
NULL - when array is NULL.
notice
Only supported in vectorized engine
example
mysql> select *, countEqual(c_array,5) from array_test;
+------+-----------------+--------------------------+
| id | c_array | countequal(`c_array`, 5) |
+------+-----------------+--------------------------+
| 1 | [1, 2, 3, 4, 5] | 1 |
| 2 | [6, 7, 8] | 0 |
| 3 | [] | 0 |
| 4 | NULL | NULL |
+------+-----------------+--------------------------+
mysql> select *,countEqual(c_array, 1),countEqual(c_array, 5),countEqual(c_array, NULL) from array_test;
+------+-----------------------+--------------------------+--------------------------+-----------------------------+
| id | c_array | countequal(`c_array`, 1) | countequal(`c_array`, 5) | countequal(`c_array`, NULL) |
+------+-----------------------+--------------------------+--------------------------+-----------------------------+
| 1 | [1, 2, 3, 4, 5] | 1 | 1 | 0 |
| 2 | [6, 7, 8] | 0 | 0 | 0 |
| 3 | [] | 0 | 0 | 0 |
| 4 | NULL | NULL | NULL | NULL |
| 5 | [66, 77] | 0 | 0 | 0 |
| 5 | [66, 77] | 0 | 0 | 0 |
| 6 | NULL | NULL | NULL | NULL |
| 7 | [NULL, NULL, NULL] | 0 | 0 | 3 |
| 8 | [1, 2, 3, 4, 5, 5, 5] | 1 | 3 | 0 |
+------+-----------------------+--------------------------+--------------------------+-----------------------------+
keywords
ARRAY,COUNTEQUAL,
