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doris/docs/en/sql-reference/sql-functions/bitmap-functions/bitmap_and_count.md
zhangstar333 1ff3d708ca [Function] add functions of bitmap_and/or_count (#6912) 
issue #6875
add bitmap_and_count/ bitmap_or_count
2021-11-01 14:00:07 +08:00

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title, language
title language
bitmap_and_count en

bitmap_and_count

description

Syntax

BigIntVal bitmap_and_count(BITMAP lhs, BITMAP rhs)

Calculate the intersection of two input bitmaps and return the number of intersections.

example

MySQL> select bitmap_and_count(bitmap_from_string('1,2,3'),bitmap_empty());
+---------------------------------------------------------------+
| bitmap_and_count(bitmap_from_string('1,2,3'), bitmap_empty()) |
+---------------------------------------------------------------+
|                                                             0 |
+---------------------------------------------------------------+


MySQL> select bitmap_and_count(bitmap_from_string('1,2,3'),bitmap_from_string('1,2,3'));
+----------------------------------------------------------------------------+
| bitmap_and_count(bitmap_from_string('1,2,3'), bitmap_from_string('1,2,3')) |
+----------------------------------------------------------------------------+
|                                                                          3 |
+----------------------------------------------------------------------------+

MySQL> select bitmap_and_count(bitmap_from_string('1,2,3'),bitmap_from_string('3,4,5'));
+----------------------------------------------------------------------------+
| bitmap_and_count(bitmap_from_string('1,2,3'), bitmap_from_string('3,4,5')) |
+----------------------------------------------------------------------------+
|                                                                          1 |
+----------------------------------------------------------------------------+

keyword

BITMAP_AND_COUNT,BITMAP