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array_to_bitmap

Description​

Converts an array into BITMAP values. This function is supported from v2.3.

Syntax​

BITMAP array_to_bitmap(array)

Parameters​

array: Elements in an array can be of the BIGINT, INT, TINYINT, or SMALLINT type.

Return value​

Returns a value of the BITMAP type.

Usage notes​

  • If the data type of elements in the input array is invalid, such as STRING or DECIMAL, an error is returned.

  • If an empty array is entered, an empty BITMAP value is returned.

  • If NULL is entered, NULL is returned.

Examples​

Example 1: Convert an array into BITMAP values. This function must be nested in bitmap_to_array because BITMAP values cannot be displayed.

MySQL > select bitmap_to_array(array_to_bitmap([1,2,3]));
+-------------------------------------------+
| bitmap_to_array(array_to_bitmap([1,2,3])) |
+-------------------------------------------+
| [1,2,3]                                   |
+-------------------------------------------+

Example 2: Enter an empty array and an empty array is returned.

MySQL > select bitmap_to_array(array_to_bitmap([]));
+--------------------------------------+
| bitmap_to_array(array_to_bitmap([])) |
+--------------------------------------+
| []                                   |
+--------------------------------------+

Example 3: Enter NULL and NULL is returned.

MySQL > select array_to_bitmap(NULL);
+-----------------------+
| array_to_bitmap(NULL) |
+-----------------------+
| NULL                  |
+-----------------------+