bitmap_and

description

Syntax

BITMAP BITMAP_AND(BITMAP lhs, BITMAP rhs, ...)

Compute intersection of two or more input bitmaps, return the new bitmap.

example

1. mysql> select bitmap_count(bitmap_and(to_bitmap(1), to_bitmap(2))) cnt;
2. +------+
3. | cnt  |
4. +------+
5. |    0 |
6. +------+

8. mysql> select bitmap_count(bitmap_and(to_bitmap(1), to_bitmap(1))) cnt;
9. +------+
10. | cnt  |
11. +------+
12. |    1 |
13. +------+

15. MySQL> select bitmap_to_string(bitmap_and(to_bitmap(1), to_bitmap(1)));
16. +----------------------------------------------------------+
17. | bitmap_to_string(bitmap_and(to_bitmap(1), to_bitmap(1))) |
18. +----------------------------------------------------------+
19. | 1                                                        |
20. +----------------------------------------------------------+

22. MySQL> select bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5')));
23. +-----------------------------------------------------------------------------------------------------------------------+
24. | bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5'))) |
25. +-----------------------------------------------------------------------------------------------------------------------+
26. | 1,2                                                                                                                   |
27. +-----------------------------------------------------------------------------------------------------------------------+

29. MySQL> select bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5'),bitmap_empty()));
30. +---------------------------------------------------------------------------------------------------------------------------------------+
31. | bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5'), bitmap_empty())) |
32. +---------------------------------------------------------------------------------------------------------------------------------------+
33. |                                                                                                                                       |
34. +---------------------------------------------------------------------------------------------------------------------------------------+

36. MySQL> select bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5'),NULL));
37. +-----------------------------------------------------------------------------------------------------------------------------+
38. | bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5'), NULL)) |
39. +-----------------------------------------------------------------------------------------------------------------------------+
40. | NULL                                                                                                                        |
41. +-----------------------------------------------------------------------------------------------------------------------------+

keyword

1. BITMAP_AND,BITMAP