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MDEV-33988 DELETE single table to support table aliases

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Gain MySQL compatibility by allowing table aliases in a single
table statement.

This now supports the syntax of:

DELETE [delete_opts] FROM tbl_name [[AS] tbl_alias] [PARTITION (partition_name [, partition_name] ...)] ....

The delete.test is from MySQL commit 1a72b69778a9791be44525501960b08856833b8d
/ Change-Id: Iac3a2b5ed993f65b7f91acdfd60013c2344db5c0.

Co-Author: Gleb Shchepa <gleb.shchepa@oracle.com> (for delete.test)

Reviewed by Igor Babaev (igor@mariadb.com)
This commit is contained in:
Daniel Black
2024-05-01 12:51:53 +10:00
parent 0cd20e3aaf
commit 75d354a23a
8 changed files with 241 additions and 12 deletions
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31
mysql-test/main/delete.result
View File

@ -259,13 +259,13 @@ a INT
);
INSERT INTO db2.t1 (a) SELECT * FROM t2;
DELETE FROM t1 alias USING t1, t2 alias WHERE t1.a = alias.a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'alias USING t1, t2 alias WHERE t1.a = alias.a' at line 1
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'USING t1, t2 alias WHERE t1.a = alias.a' at line 1
DELETE FROM alias USING t1, t2 alias WHERE t1.a = alias.a;
DELETE FROM t1, alias USING t1, t2 alias WHERE t1.a = alias.a;
DELETE FROM t1, t2 USING t1, t2 alias WHERE t1.a = alias.a;
ERROR 42S02: Unknown table 't2' in MULTI DELETE
DELETE FROM db1.t1 alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a' at line 1
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a' at line 1
DELETE FROM alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
DELETE FROM db2.alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
ERROR 42S02: Unknown table 'alias' in MULTI DELETE
@ -273,7 +273,7 @@ DELETE FROM t1 USING t1 WHERE a = 1;
SELECT * FROM t1;
a
DELETE FROM t1 alias USING t1 alias WHERE a = 2;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'alias USING t1 alias WHERE a = 2' at line 1
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'USING t1 alias WHERE a = 2' at line 1
SELECT * FROM t1;
a
DROP TABLE t1, t2;
@ -611,3 +611,28 @@ c1 c2 c3
2 2 5
drop table t1;
End of 11.1 tests
#
# MDEV-33988 DELETE to support table aliases
#
CREATE TABLE t1 (c1 INT);
INSERT INTO t1 VALUES (1), (2);
SELECT * FROM t1;
c1
1
2
DELETE FROM t1 AS a1 WHERE a1.c1 = 2;
SELECT * FROM t1;
c1
1
CREATE TABLE t2 (c2 INT);
INSERT INTO t2 VALUES (1), (2);
SELECT * FROM t2;
c2
1
2
DELETE FROM t2 a2 WHERE NOT EXISTS (SELECT * FROM t1 WHERE t1.c1 = a2.c2);
SELECT * FROM t2;
c2
1
DROP TABLE t1, t2;
End of 11.6 tests