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Mysql Error 1071 Specified Key Was Too Long

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Specified Key Was Too Long Max Key Length Is 1000 Bytes Mysql

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Mysql Innodb Increase Max Key Length

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Index Column Size Too Large. The Maximum Column Size Is 767 Bytes.

is 767 bytes up vote 194 down vote favorite 43 When I executed the following command: ALTER TABLE `mytable` ADD UNIQUE ( `column1` , `column2` ); I got this error message: #1071 - Specified key was too long; max key length is 767 bytes Information about column1 and column2: column1 varchar(20) utf8_general_ci column2 varchar(500) utf8_general_ci I think varchar(20) only requires 21 bytes while varchar(500) only requires 501 bytes. mysql max key length So the total bytes are 522, less than 767. So why did I get the error message? #1071 - Specified key was too long; max key length is 767 bytes mysql byte varchar mysql-error-1071 share|improve this question edited May 23 '11 at 21:32 OMG Ponies 199k37360417 asked Nov 29 '09 at 3:18 Steven 5,2993480112 Because its not 520 bytes, but rather, 2080 bytes, which far exceeds 767 bytes, you could do column1 varchar(20) and column2 varchar(170). if you want a character/byte equiv, use latin1 –Rahly Dec 18 '15 at 0:21 add a comment| 17 Answers 17 active oldest votes up vote 137 down vote accepted 767 bytes is the stated prefix limitation for InnoDB tables - its 1,000 bytes long for MyISAM tables. According to the response to this issue, you can get the key to apply by specifying a subset of the column rather than the entire amount. IE: ALTER TABLE `mytable` ADD UNIQUE ( column1(15), column2(200) ); Tweak as you need to get the key to apply, but I wonder if it would be worth it to review your data model regarding this entity to see if there's improvements that would allow you to implement the intended busine

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 column error 1709 (hy000): index column size too large. the maximum column size is 767 bytes. to an InnoDB table in MySQL, you may have seen this error: innodb_large_prefix 1 ERROR 1071 (42000): Specified key was too long; max key length is 767 bytes The django.db.utils.operationalerror: (1071, 'specified key was too long; max key length is 767 bytes') 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 you use utf8 http://stackoverflow.com/questions/1814532/1071-specified-key-was-too-long-max-key-length-is-767-bytes 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 a 1000 byte index http://mechanics.flite.com/blog/2014/07/29/using-innodb-large-prefix-to-avoid-error-1071/ 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, and the default row format is COMPACT. You

log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn http://dba.stackexchange.com/questions/49913/specified-key-was-too-long-max-key-length-is-1000-bytes-in-mysql-5-6 more about hiring developers or posting ads with us Database Administrators Questions Tags Users Badges http://dba.stackexchange.com/questions/11393/mysql-error-1071-specified-key-was-too-long-max-key-length-is-1000-bytes-whil Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the max key top Specified key was too long; max key length is 1000 bytes in mysql 5.6 up vote 2 down vote favorite 1 one of the application server is internally creating the database on my mysql but when ever the following create table command gets executed CREATE TABLE ofRoster ( rosterID BIGINT NOT NULL, username VARCHAR(64) NOT NULL, jid VARCHAR(1024) NOT NULL, sub TINYINT NOT NULL, ask TINYINT NOT NULL, recv TINYINT NOT NULL, nick VARCHAR(255), PRIMARY KEY max key length (rosterID), INDEX ofRoster_unameid_idx (username), INDEX ofRoster_jid_idx (jid) ) i am getting following error ERROR 1071 (42000): Specified key was too long; max key length is 1000 bytes i have set my default engine to MyISAM because i was getting following error in InnoDB specified key was too long max key length is 767 bytes my current engines are as follows +--------------------+---------+----------------------------------------------------------------+--------------+------+------------+ | Engine | Support | Comment | Transactions | XA | Savepoints | +--------------------+---------+----------------------------------------------------------------+--------------+------+------------+ | FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL | | MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO | | MyISAM | DEFAULT | MyISAM storage engine | NO | NO | NO | | BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO | | CSV | YES | CSV storage engine | NO | NO | NO | | MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO | | ARCHIVE | YES | Archive storage engine | NO | NO | NO | | InnoDB | YES | Supports transactions, row-level locking, and foreign keys | YES | YES | YES | | PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO | +--------------------+---------+----------------------------------------------------------------+--------------+------+------------+ now

log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Database Administrators Questions Tags Users Badges Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top MySql - ERROR 1071 Specified key was too long; max key length is 1000 bytes while restoring dump up vote 4 down vote favorite while trying to restore a MySql Dump, i get the following error: ERROR 1071 (42000) at line 25: Specified key was too long; max key length is 1000 bytes any ideas? mysql mysqldump share|improve this question edited Jan 23 '12 at 16:41 RolandoMySQLDBA 108k15139276 asked Jan 23 '12 at 15:54 Ran 58351223 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote accepted You may to have adjust some VARCHAR length in some table based on the Character Set you are using. That exact error message is actually posted as a bug report from Nov 2004, when in fact, it is not really a bug. That should direct you on how to adjust key lengths, especially your PRIMARY KEYs. If you know which table is causing the Error 1071, you have to do the following: Step 01) mysqldump only database schema mysqldump --routines --triggers --all-databases --no-data > MySQLSchema.sql Step 02) mysqldump only data mysqldump --all-databases --no-create-info > MySQLData.sql Step 03) Using vi or some other editor, edit the table's PRIMARY KEY to manually limit the PRIMARY KEY in such a way that the key does not exceed 1000 characters. Step 04) Load the schema mysql -A < MySQLSchema.sql Step 05) Load the data mysql -A < MySQLData.sql You may have to resort to this if you cannot otherwise figure

 

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error sqlstate er too long key p exceeded the limit of the maximum error specified key was too long max key length is bytes key length A key can not be longer than bytes error hy index column size too large the maximum column size is bytes bytes for InnoDB Please note that this limit is set in bytes not in characters So if you use a multi-byte Innodb large prefix character set you can get this error even if the sum of column lengths is less than because column length is defined in characters Below is an example of

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mysql error 1071 key too long

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Mysql Error p CI MySQL Sandbox MariaDB data chef Adtech Twitter GitHub RSS Using Innodb large prefix to Avoid ERROR If you've ever tried to add an index that includes a long varchar column to an InnoDB table in MySQL you may have seen this error Specified Key Was Too Long Max Key Length Is Bytes Mysql span class 'line' ERROR Specified key was too long max key length is specified key was too long max key length is bytes mysql bytes span The character limit depends on the character set you use For example if you use latin then

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