BITMAP_AND_NOT,BITMAP_ANDNOT

Description

Perform a NOT operation on two BITMAPs and return the result. The first input parameter is called base BITMAP and the second is called exclude BITMAP.

Alias

• BITMAP_ANDNOT

Syntax

BITMAP_AND_NOT(<bitmap1>, <bitmap2>)

Parameters

Parameter	Description
<bitmap1>	Base BITMAP to be negated
<bitmap2>	Exclusion BITMAP to be negated

Return Value

Returns a BITMAP.

• If the parameter has a NULL value, returns NULL

Examples

select bitmap_count(bitmap_and_not(bitmap_from_string('1,2,3'),bitmap_from_string('3,4,5'))) cnt;

+------+
| cnt  |
+------+
|    2 |
+------+

select bitmap_to_string(bitmap_and_not(bitmap_from_string('1,2,3'),bitmap_from_string('3,4,5'))) as cnt;

+------+
| cnt  |
+------+
| 1,2  |
+------+

select bitmap_to_string(bitmap_and_not(bitmap_from_string('1,2,3'),bitmap_empty())) cnt;

+-------+
| cnt   |
+-------+
| 1,2,3 |
+-------+

select bitmap_to_string(bitmap_and_not(bitmap_from_string('1,2,3'),NULL)) as res;

+------+
| res  |
+------+
| NULL |
+------+