24.32.10 The INFORMATION_SCHEMA INNODB_FT_DELETED Table
INNODB_FT_DELETED table stores rows that are deleted from the
FULLTEXT index for an
InnoDB table. To avoid expensive index reorganization during DML operations for an
FULLTEXT index, the information about newly deleted words is stored separately, filtered out of search results when you do a text search, and removed from the main search index only when you issue an
OPTIMIZE TABLE statement for the
InnoDB table. For more information, see Optimizing InnoDB Full-Text Indexes.
This table is empty initially. Before querying it, set the value of the
innodb_ft_aux_table system variable to the name (including the database name) of the table that contains the
FULLTEXT index; for example
For related usage information and examples, see Section 14.16.4, “InnoDB INFORMATION_SCHEMA FULLTEXT Index Tables”.
INNODB_FT_DELETED table has these columns:
The document ID of the newly deleted row. This value might reflect the value of an ID column that you defined for the underlying table, or it can be a sequence value generated by
InnoDBwhen the table contains no suitable column. This value is used when you do text searches, to skip rows in the
INNODB_FT_INDEX_TABLEtable before data for deleted rows is physically removed from the
FULLTEXTindex by an
OPTIMIZE TABLEstatement. For more information, see Optimizing InnoDB Full-Text Indexes.
mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_DELETED; +--------+ | DOC_ID | +--------+ | 6 | | 7 | | 8 | +--------+
You must have the
PROCESSprivilege to query this table.