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MDEV-25080 Implement ColumnStore-side changes for pushdown of SELECT_LEX_UNITs.

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This commit is contained in:
Gagan Goel
2022-08-31 16:46:15 -04:00
parent 8671f55784
commit 45a779f743
11 changed files with 551 additions and 126 deletions
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26
mysql-test/columnstore/basic/r/union.result
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@ -5,6 +5,9 @@ USE mcs_union;
#
# MCOL-4700 Wrong result of a UNION for INT and INT UNSIGNED
#
# Move the UNIONs from the subqueries to outer selects and add
# ORDER BY clause after MCOL-5222 is fixed
#
CREATE TABLE t1 (a INT, b INT UNSIGNED);
INSERT INTO t1 VALUES (-1, 1), (-1, 1), (-2, 2);
SELECT * FROM (SELECT * FROM t1 UNION SELECT * FROM t1) tu ORDER BY b;
@ -862,4 +865,27 @@ a
16777213
9223372036854775807
DROP TABLE t1,t2;
#
# Union of tables containing different string data types
#
# Uncomment the actual SELECTs and add ORDER BY clause
# after MCOL-5222 is fixed
#
CREATE TABLE t1 (a CHAR(6));
INSERT INTO t1 VALUES ('t13abc'), ('t13xx'), ('common');
CREATE TABLE t2 (a VARCHAR(8));
INSERT INTO t2 VALUES ('t14abcde'), ('t14xyzzz'), ('common');
EXPLAIN SELECT * FROM t1 UNION SELECT * FROM t2;
id select_type table type possible_keys key key_len ref rows Extra
NULL PUSHED UNION NULL NULL NULL NULL NULL NULL NULL NULL
EXPLAIN SELECT * FROM t2 UNION ALL SELECT * FROM t1;
id select_type table type possible_keys key key_len ref rows Extra
NULL PUSHED UNION NULL NULL NULL NULL NULL NULL NULL NULL
EXPLAIN SELECT * FROM t1 UNION SELECT * FROM t2 UNION SELECT '123456789000';
id select_type table type possible_keys key key_len ref rows Extra
NULL PUSHED UNION NULL NULL NULL NULL NULL NULL NULL NULL
EXPLAIN SELECT * FROM t1 UNION SELECT '123456789000' UNION SELECT * FROM t2;
id select_type table type possible_keys key key_len ref rows Extra
NULL PUSHED UNION NULL NULL NULL NULL NULL NULL NULL NULL
DROP TABLE t1,t2;
DROP DATABASE mcs_union;