error 1071 sqlstate 42000 er_too_long_key
exceeded the limit of the maximum error 1071 (42000) specified key was too long; max key length is 1000 bytes key length. A key can not be longer than 1000 bytes error 1709 (hy000): index column size too large. the maximum column size is 767 bytes. (767 bytes for InnoDB). Please note that this limit is set in bytes, not in characters. So if you use a multi-byte
Innodb_large_prefixcharacter set, you can get this error even if the sum of column lengths is less than 1000 because column length is defined in characters. Below is an example of this: CREATE TABLE table1( str1 VARCHAR(255), str2 VARCHAR(255), str3 VARCHAR(255)) DEFAULT CHARACTER SET utf8; ALTER TABLE table1 ADD INDEX (str1, str2, str3); ERROR 1071 (42000): Specified key was too long; max key length is 1000 bytes
CI MySQL Sandbox MariaDB data chef Adtech Twitter GitHub RSS Using Innodb_large_prefix to Avoid ERROR 1071 If you've ever tried to add an index that includes a long varchar
Mysql Innodb Increase Max Key Lengthcolumn to an InnoDB table in MySQL, you may have seen mysql max key length this error: 1 ERROR 1071 (42000): Specified key was too long; max key length is 767 django.db.utils.operationalerror: (1071, 'specified key was too long; max key length is 767 bytes') bytes The character limit depends on the character set you use. For example if you use latin1 then the largest column you can index is varchar(767), but if http://www.mysqlab.net/knowledge/kb/detail/topic/error%20messages/id/6595 you use utf8 then the limit is varchar(255). There is also a separate 3072 byte limit per index. The 767 byte limit is per column, so you can include multiple columns (each 767 bytes or smaller) up to 3072 total bytes per index, but no column longer than 767 bytes. (MyISAM is a little different. It has http://mechanics.flite.com/blog/2014/07/29/using-innodb-large-prefix-to-avoid-error-1071/ a 1000 byte index length limit, but no separate column length limit within that). One workaround for these limits is to only index a prefix of the longer columns, but what if you want to index more than 767 bytes of a column in InnoDB? In that case you should consider using innodb_large_prefix, which was introduced in MySQL 5.5.14 and allows you to include columns up to 3072 bytes long in InnoDB indexes. It does not affect the index limit, which is still 3072 bytes as quoted in the manual: The InnoDB internal maximum key length is 3500 bytes, but MySQL itself restricts this to 3072 bytes. This limit applies to the length of the combined index key in a multi-column index. Read on for details and examples about innodb_large_prefix. Here are a few pre-requisites for using innodb_large_prefix: At the database level you have to use innodb_file_format=BARRACUDA At the table level you have to use ROW_FORMAT=DYNAMIC or ROW_FORMAT=COMPRESSED The default file format is still Antelope for backwards compatibility,
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Message: Table '%s' already exists Error: 1051 SQLSTATE: 42S02 (ER_BAD_TABLE_ERROR) Message: Unknown table '%s' Error: 1052 SQLSTATE: 23000 (ER_NON_UNIQ_ERROR) Message: Column '%s' in %s is ambiguous Error: 1053 SQLSTATE: 08S01 (ER_SERVER_SHUTDOWN) Message: Server shutdown in progress Error: 1054 SQLSTATE: 42S22 (ER_BAD_FIELD_ERROR) Message: Unknown column '%s' in '%s' Error: 1055 SQLSTATE: 42000 (ER_WRONG_FIELD_WITH_GROUP) Message: '%s' isn't in GROUP BY Error: 1056 SQLSTATE: 42000 (ER_WRONG_GROUP_FIELD) Message: Can't group on '%s' Error: 1057 SQLSTATE: 42000 (ER_WRONG_SUM_SELECT) Message: Statement has sum functions and columns in same statement Error: 1058 SQLSTATE: 21S01 (ER_WRONG_VALUE_COUNT) Message: Column count doesn't match value count Error: 1059 SQLSTATE: 42000 (ER_TOO_LONG_IDENT) Message: Identifier name '%s' is too long Error: 1060 SQLSTATE: 42S21 (ER_DUP_FIELDNAME) Message: Duplicate column name '%s' Error: 1061 SQLSTATE: 42000 (ER_DUP_KEYNAME) Message: Duplicate key name '%s' Error: 1062 SQLSTATE: 23000 (ER_DUP_ENTRY) Message: Duplicate entry '%s' for key %d Error: 1063 SQLSTATE: 42000 (ER_WRONG_FIELD_SPEC) Message: Incorrect column specifier for column '%s' Error: 1064 SQLSTATE: 42000 (ER_PARSE_ERROR) Message: %s near '%s' at line %d Error: 1065 SQLSTATE: 42000 (ER_EMPTY_QUERY) Message: Query was empty Error: 1066 SQLSTATE: 42000 (ER_NONUNIQ_TABLE) Message: Not unique table/alias: '%s' Error: 1067 SQLSTATE: 42000 (ER_INVALID_DEFAULT) Message: Invalid default value for '%s' Error: 1068 SQLSTATE: 42000 (ER_MULTIPLE_PRI_KEY) Message: Multiple primary key defined Error: 1069 SQLSTATE: 42000 (ER_TOO_MANY_KEYS) Message: Too many keys specified; max %d keys allowed Error: 1070 SQLSTATE: 42000 (ER_TOO_MANY_KEY_PARTS) Message: Too many key parts specified; max %d parts allowed Error: 1071 SQLSTATE: 42000 (ER_TOO_LONG_KEY) Message: Specified key was too long; max key length is %d bytes Error: 1072 SQLSTATE: 42000 (ER_KEY_COLUMN_DOES_NOT_EXITS) Message: Key column '%s'