https://dev.mysql.com/index-hints.html
For example, the following two queries are equivalent: SELECT * FROM t1 USE INDEX (i1) IGNORE INDEX (i2) USE INDEX (i2); SELECT * FROM t1 USE INDEX (i1); For FULLTEXT searches, index hints work as follows: For natural language mode searches, index ... Index hints give the optimizer information about how to choose indexes during query ...
https://dev.mysql.com/descending-indexes.html
Explicitly specified ASC and DESC designators for HASH, FULLTEXT, and SPATIAL indexes results in an error. MySQL supports descending indexes: DESC in an index definition is no longer ignored but causes storage of key values in descending order.
https://dev.mysql.com/myisam-ftdump.html
Example: Suppose that the test database contains a table named mytexttable that has the following definition: CREATE TABLE mytexttable ( id INT NOT NULL, txt TEXT NOT NULL, PRIMARY KEY (id), FULLTEXT (txt) ) ENGINE=MyISAM; The index on id is index 0 ...It reads the MyISAM index file directly, so it must be run on the server host where the table is ...
https://dev.mysql.com/myisamchk-general-options.html
ft_min_word_len and ft_max_word_len indicate the minimum and maximum word length for FULLTEXT indexes on MyISAM tables. If you use myisamchk to perform an operation that modifies table indexes (such as repair or analyze), the FULLTEXT indexes are ...
https://dev.mysql.com/explain-output.html
In the following examples, MySQL can use a ref join to process ref_table: SELECT * FROM ref_table WHERE key_column=expr; SELECT * FROM ref_table,other_table WHERE ref_table.key_column=other_table.column; SELECT * FROM ref_table,other_table WHERE ...
https://dev.mysql.com/myisamchk.html
The myisamchk utility gets information about your database tables or checks, repairs, or optimizes them. myisamchk works with MyISAM tables (tables that have .MYD and .MYI files for storing data and indexes). You can also use the CHECK TABLE and ...
https://dev.mysql.com/optimize-table.html
After doing substantial insert, update, or delete operations on columns that are part of a FULLTEXT index in an InnoDB table. OPTIMIZE TABLE using online DDL is not supported for InnoDB tables that contain FULLTEXT indexes. OPTIMIZE TABLE ...
https://dev.mysql.com/mysql-cluster-limitations-syntax.html
The NDB storage engine does not support FULLTEXT indexes, which are possible for MyISAM and InnoDB tables only. Some SQL statements relating to certain MySQL features produce errors when used with NDB tables, as described in the following list: ...
https://dev.mysql.com/replication-rbr-safe-unsafe.html
For this reason, all statements relying on the fulltext plugin are treated as unsafe in MySQL. The “safeness” of a statement in MySQL replication refers to whether the statement and its effects can be replicated correctly using statement-based ...
https://dev.mysql.com/mysql-indexes.html
Most MySQL indexes (PRIMARY KEY, UNIQUE, INDEX, and FULLTEXT) are stored in B-trees. Exceptions: Indexes on spatial data types use R-trees; MEMORY tables also support hash indexes; InnoDB uses inverted lists for FULLTEXT indexes. Indexes are used ...
