How we can do Full Text Search in InnoDB?
InnoDB doesn't natively support full-text search. You can use Sphinx to accomplish something similar to this though, I believe.
Innodb doesnt support full text searching, if you really need full text searching then what you can do is have a duplicate mysiam table of the original innodb table and have your full text search done on the duplicate table
In mysql 5.6 Innodb full text search FTS facility provided.
Fulltext seach is MyISAM only.
You don't. InnoDB does not support fulltext indexes.
Full-text indexes can be used only
with MyISAM tables, and can be created
only for CHAR, VARCHAR, or TEXT
columns.
From here.
Just an update to this thread, MySql 5.6 now supports FULLTEXT indexes in innoDb :
http://dev.mysql.com/doc/refman/5.6/en/innodb-table-and-index.html#innodb-fulltext-index
The answer for this question is outdated, InnoDB supported fulltext search already in MySQL 5.6, check here for more information
Related
what are the main technical reasons to use innodb type of tables most of the time, rather than myiasm.
I searched for it, but not satisfied / confused.
some are saying it depends on the requirement.
can anyone explain how it depends on the requirement and where it differs in performance?
There's a whole wikipedia page just for this discussion :-)
http://en.wikipedia.org/wiki/Comparison_of_MySQL_database_engines
InnoDB is a right choice if you are using MySQL v5.6 as InnoDB supports full text search (FTS)
You can refer my existing answer from here https://dba.stackexchange.com/questions/1/what-are-the-main-differences-between-innodb-and-myisam/46663#46663
SELECT firstname, lastname,comments
FROMusers
WHERE MATCH(firstname,lastname,comments)
AGAINST('$searchterm')
I tried the above one as query for search engine ,but mysql says FULL-TEXT INDEXING is supported only on MYISAM ,Engine i am using is innoDB,Please tell me the best way of coloumn INDEX searching ON InnoDB Engine.
Based on my knowledge, MySQL FTS has been available for InnoDB since version 5.6 (http://dev.mysql.com/tech-resources/articles/whats-new-in-mysql-5.6.html)
You should take a look at MySQL Fulltex search document here http://dev.mysql.com/doc/refman/5.5/en/fulltext-search.html
Basically, I think you should understand what is 'index' and how MySQL do indexing. This article is very useful for helping understand the mechanism behind MySQL fulltext search http://dev.mysql.com/doc/internals/en/full-text-search.html
There are several important concepts in full-text search:
Boolean mode
Natural language mode
I also recommend you read about stopwords list in MySQL FTS.
System variable likes ft_min_word_len is also important.
After understanding these things, I think you will know how to apply MySQL fulltext search properly.
I realize that MySQL 5.6 is still in beta, but does anyone have experience using the new InnoDB FTS engine? How does it compare to something like Sphinx?
Thanks
Jason
Never used Sphinx, but tried MySQL 5.6 FTS on an Innodb table with about 170k rows. Made an FTS index on the name column (contains all names of a person). To find a word in any position of the string MATCH(name) AGAINST("+word*") IN BOOLEAN MODE does work a lot faster (2-3 times in my case) than using name LIKE "word%" OR name LIKE "% word". However when making joins do check EXPLAIN to see if the FTS index is actually used. It seems MySQL optimizer is not that good at guessing when the FTS index should be used.
The FULLTEXT feature that formerly required downloading a special build from labs.mysql.com is now part of the mainline MySQL build in 5.6.5 and up (still in beta). The documentation for the FULLTEXT functions now includes the InnoDB-specific details: MySQL Full-Text Search Functions
Remember, that Sphinx search is developed for full text searching in mysql it's just a feature...
Here you have compare of sphinx and mysql FTS:
http://www.percona.com/files//presentations/opensql2008_sphinx.pdf
Here is performance test of InnoDB FTS compared to MyISAM:
http://blogs.innodb.com/wp/2011/07/innodb-fts-performance/
InnoDB its bit faster especially in indexing, but it's still far away from sphinx performance...
I've done some searching into fulltext searches for MySQL InnoDB and found a few on stack overflow, but they either don't provide an exact solution or they are a bit dated and I think it's time to rediscuss.
All of my tables are InnoDB and I'd prefer not to lock the entire database with MyISAM. What are my options in regards to fulltext searching? Are there any simple solutions? I'd like to do the equivalant of MATCH (content) AGAINST ("my search query" IN BOOLEAN MODE)
There is no equivalant of MATCH AGAINST in Innodb. Fulltext searching is one of pros of using MyIsam. So you should use standalone seaching server like Sphinx or Solr
InnoDB full-text search (FTS) is finally available in MySQL 5.6.4 release.
These indexes are physically represented as entire InnoDB tables, which are acted upon by SQL keywords such as the FULLTEXT clause of the CREATE INDEX statement, the MATCH() ... AGAINST syntax in a SELECT statement, and the OPTIMIZE TABLE statement.
From FULLTEXT Indexes
I’m trying to create a FULLTEXT index on an attribute of a table. Mysql returns
ERROR 1214: The used table type doesn’t support FULLTEXT indexes.
Any idea what I’m doing wrong?
You’re using the wrong type of table. Mysql supports a few different types of tables, but the most commonly used are MyISAM and InnoDB. MyISAM (in MySQL 5.6+also InnoDB tables) are the types of tables that Mysql supports for Full-text indexes.
To check your table’s type issue the following sql query:
SHOW TABLE STATUS
Looking at the result returned by the query, find your table and corresponding value in the Engine column. If this value is anything except MyISAM or InnoDB then Mysql will throw an error if your trying to add FULLTEXT indexes.
To correct this, you can use the sql query below to change the engine type:
ALTER TABLE <table name> ENGINE = [MYISAM | INNODB]
Additional information (thought it might be useful):
Mysql using different engine storage types to optimize for the needed functionality of specific tables. Example MyISAM is the default type for operating systems (besides windows), preforms SELECTs and INSERTs quickly; but does not handle transactions. InnoDB is the default for windows, can be used for transactions. But InnoDB does require more disk space on the server.
Up until MySQL 5.6, MyISAM was the only storage engine with support for full-text search (FTS) but it is true that InnoDB FTS in MySQL 5.6 is syntactically identical to MyISAM FTS. Please read below for more details.
InnoDB Full-text Search in MySQL 5.6
On MySQL <= 5.5, the mysql manual says that FULLTEXT indexes can only be created on tables with the mylsam engine.
Are you using InnoDB? The only table type that supports FULLTEXT is MyISAM.
apart from MyISAM table PARTITIONING also not support full-text index.