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MCOL-4719 iterate into subquery looking for windowfunctions

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When an outer query filter accesses an subquery column that contains an aggregate or a window function, certain optimizations can't be performed. We had been looking at the surface of the returned column. We now iterate into any functions or operations looking for aggregates and window functions.
This commit is contained in:
David Hall
2021-07-22 13:56:21 -05:00
parent 4cdef40a55
commit a202bda485
4 changed files with 55 additions and 10 deletions
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17
mysql-test/columnstore/bugfixes/mcol_4719.result Normal file
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DROP DATABASE IF EXISTS mcol_4719;
CREATE DATABASE mcol_4719;
USE mcol_4719;
CREATE TABLE test_table (category CHAR(1), count INTEGER(1))ENGINE=COLUMNSTORE;
INSERT INTO test_table (category, count) VALUES ('A', 1);
INSERT INTO test_table (category, count) VALUES ('A', 2);
INSERT INTO test_table (category, count) VALUES ('B', 3);
INSERT INTO test_table (category, count) VALUES ('B', 4);
select * FROM (SELECT count / SUM(count) OVER (PARTITION BY category) AS ratio FROM test_table) a where ratio > .5;
ratio
0.6667
0.5714
select * FROM (SELECT round(0+SUM(count) OVER (PARTITION BY category),3) AS x FROM test_table ) a where x>3;
x
7.000
7.000
DROP DATABASE mcol_4719;

17
mysql-test/columnstore/bugfixes/mcol_4719.test Normal file
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--source ../include/have_columnstore.inc
--disable_warnings
DROP DATABASE IF EXISTS mcol_4719;
--enable_warnings
CREATE DATABASE mcol_4719;
USE mcol_4719;
CREATE TABLE test_table (category CHAR(1), count INTEGER(1))ENGINE=COLUMNSTORE;
INSERT INTO test_table (category, count) VALUES ('A', 1);
INSERT INTO test_table (category, count) VALUES ('A', 2);
INSERT INTO test_table (category, count) VALUES ('B', 3);
INSERT INTO test_table (category, count) VALUES ('B', 4);
# a subselect with an arithmetic operator on a window function
select * FROM (SELECT count / SUM(count) OVER (PARTITION BY category) AS ratio FROM test_table) a where ratio > .5;
# a subselect with a function containing an arithmetic operator on a window function
select * FROM (SELECT round(0+SUM(count) OVER (PARTITION BY category),3) AS x FROM test_table ) a where x>3;
DROP DATABASE mcol_4719;