orthogonal_bitmap_expr_calculate_count

description

Syntax

BITMAP ORTHOGONAL_BITMAP_EXPR_CALCULATE_COUNT(bitmap_column, column_to_filter, input_string) Calculate the bitmap intersection, union and difference set of expressions to calculate the count function. The first parameter is the Bitmap column, the second parameter is the dimension column used for filtering, that is, the calculated key column, and the third parameter is the calculation expression string, meaning that the bitmap intersection, union and difference set expression is calculated according to the key column The calculators supported by the expression:&represents intersection calculation, | represents union calculation, - represents difference calculation, ^ represents XOR calculation, and \ represents escape characters

example

select orthogonal_bitmap_expr_calculate_count(user_id, tag, '(833736|999777)&(1308083|231207)&(1000|20000-30000)') from user_tag_bitmap where tag in (833736,999777,130808,231207,1000,20000,30000);
Note: 1000, 20000, 30000 plastic tags represent different labels of users

select orthogonal_bitmap_expr_calculate_count(user_id, tag, '(A:a/b|B:2\\-4)&(C:1-D:12)&E:23') from user_str_tag_bitmap where tag in ('A:a/b', 'B:2-4', 'C:1', 'D:12', 'E:23');
Note: 'A:a/b', 'B:2-4', etc. are string types tag, representing different labels of users, where 'B:2-4' needs to be escaped as'B:2\\-4'

keywords

ORTHOGONAL_BITMAP_EXPR_CALCULATE_COUNT,BITMAP