bitmap_subset_limit

bitmap_subset_limit

Description

Syntax:

BITMAP BITMAP_SUBSET_LIMIT(BITMAP src, BIGINT range_start, BIGINT cardinality_limit)

This function generates the sub-bitmap of src. The sub-bitmap starts from range_start and its size is no larger than cardinality_limit. range_start: starting point (included) of the range; cardinality_limit: the upper limit of cardinality of the sub-bitmap.

Example

mysql> select bitmap_to_string(bitmap_subset_limit(bitmap_from_string('1,2,3,4,5'), 0, 3)) value;
+-----------+
| value     |
+-----------+
| 1,2,3 |
+-----------+

mysql> select bitmap_to_string(bitmap_subset_limit(bitmap_from_string('1,2,3,4,5'), 4, 3)) value;
+-------+
| value |
+-------+
| 4,5     |
+-------+

Keywords

BITMAP_SUBSET_LIMIT,BITMAP_SUBSET,BITMAP