WEIGHT_STRING() for one character uses 8 bytes in latin2_czech_cs,
but the data type for WEIGHT_STRING(varchar_1_column)
is VARBINARY(1). The expected data type is VARBINARY(8).
This script demonstrates the problem:
mysql> DROP TABLE IF EXISTS t1;
Query OK, 0 rows affected (0.00 sec)
mysql> CREATE TABLE t1 (a VARCHAR (1)) CHARACTER SET latin2 COLLATE latin2_czech_cs;
Query OK, 0 rows affected (0.05 sec)
mysql> INSERT INTO t1 VALUES (0xF3),(0xD3);
Query OK, 2 rows affected (0.00 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> DROP TABLE IF EXISTS t2;
Query OK, 0 rows affected (0.11 sec)
mysql> CREATE TABLE t2 AS SELECT weight_string(a) FROM t1;
Query OK, 2 rows affected, 2 warnings (0.36 sec)
Records: 2 Duplicates: 0 Warnings: 2
mysql> SHOW WARNINGS;
+ ---------+------+-------------------------------------------------------+
| Level | Code | Message |
+ ---------+------+-------------------------------------------------------+
| Warning | 1265 | Data truncated for column 'weight_string(a)' at row 1 |
| Warning | 1265 | Data truncated for column 'weight_string(a)' at row 2 |
+ ---------+------+-------------------------------------------------------+
2 rows in set (0.00 sec)
mysql> SHOW CREATE TABLE t2;
+ -------+-----------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+ -------+-----------------------------------------------------------------------------------------------------------+
| t2 | CREATE TABLE `t2` (
`weight_string(a)` varbinary(1) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
+ -------+-----------------------------------------------------------------------------------------------------------+
1 row in set (0.16 sec)
mysql> SELECT LENGTH(weight_string(a)) FROM t1;
+ --------------------------+
| LENGTH(weight_string(a)) |
+ --------------------------+
| 8 |
| 8 |
+ --------------------------+
2 rows in set (0.00 sec)
Alexander Barkov
made changes -
2013-11-01 14:07
Field
Original Value
New Value
Resolution
Fixed
[ 1
]
Status
Open
[ 1
]
Closed
[ 6
]
Sergei Golubchik
made changes -
2014-06-13 15:06
Workflow
defaullt
[ 29416
]
MariaDB v2
[ 43279
]
Sergei Golubchik
made changes -
2021-12-06 21:39
Workflow
MariaDB v3
[ 62365
]
MariaDB v4
[ 147159
]
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The problem is also repeatable in MySQL-5.6.14.