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MDEV-23245 MDEV-22898 Still getting assertion failure in file data0type.cc line 67

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Doesn't allow instant alter of a field which is a prefix part of some key

is_part_of_a_key_prefix(): I hope the name of the function is clear

ha_innobase::can_convert_string()
ha_innobase::can_convert_varstring()
ha_innobase::can_convert_blob(): it can't when field is_part_of_a_key_prefix()
This commit is contained in:
Eugene Kosov
2020-07-28 09:37:45 +03:00
parent 5b3b53ce36
commit 423de1e574
3 changed files with 148 additions and 36 deletions
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40
mysql-test/suite/innodb/r/instant_alter_charset.result
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@@ -1992,3 +1992,43 @@ KEY a_key (b, a(1))
INSERT INTO t1 VALUES ();
ALTER TABLE t1 MODIFY a text DEFAULT NULL;
DROP TABLE t1;
#
# MDEV-23245 Still getting assertion failure in file data0type.cc line 67
#
CREATE TABLE Foo
(
Bar char(2) CHARACTER SET utf8,
KEY Bar (Bar(1))
) ENGINE = InnoDB;
ALTER TABLE Foo MODIFY Bar char(2) CHARACTER SET utf8mb4;
INSERT INTO Foo VALUES ('a');
DROP TABLE Foo;
CREATE TABLE Foo
(
Bar varchar(2) CHARACTER SET utf8,
KEY Bar (Bar(1))
) ENGINE = InnoDB;
ALTER TABLE Foo MODIFY Bar varchar(2) CHARACTER SET utf8mb4;
INSERT INTO Foo VALUES ('a');
DROP TABLE Foo;
CREATE TABLE Foo
(
Bar text CHARACTER SET utf8,
KEY Bar (Bar(1))
) ENGINE = InnoDB;
ALTER TABLE Foo MODIFY Bar text CHARACTER SET utf8mb4;
INSERT INTO Foo VALUES ('a');
DROP TABLE Foo;
CREATE TABLE t1 (a VARCHAR(2) CHARACTER SET utf8mb3 COLLATE utf8mb3_unicode_ci,
PRIMARY KEY (a(1)))
ENGINE=InnoDB;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` varchar(2) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL,
PRIMARY KEY (`a`(1))
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t1 MODIFY a VARCHAR(2)
CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
INSERT INTO t1 VALUES ('a');
DROP TABLE t1;