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MySQL 5.6 Reference Manual  /  ...  /  The INFORMATION_SCHEMA INNODB_FT_DELETED Table

21.29.24 The INFORMATION_SCHEMA INNODB_FT_DELETED Table

The INNODB_FT_DELETED table records rows that are deleted from the FULLTEXT index for an InnoDB table. To avoid expensive index reorganization during DML operations for an InnoDB 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 the OPTIMIZE TABLE statement for the InnoDB table. See Optimizing InnoDB Full-Text Indexes for more information.

This table initially appears empty, until you set the value of the configuration variable innodb_ft_aux_table to the name (including the database name) of the table that contains the FULLTEXT index, for example test/articles.

For related usage information and examples, see Section 14.13.4, “InnoDB INFORMATION_SCHEMA FULLTEXT Index Tables”.

Table 21.26 INNODB_FT_DELETED Columns

Column nameDescription
DOC_IDThe 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 InnoDB when the table does not contain a suitable column. This value is used to skip rows in the innodb_ft_index_table table, when you do text searches before data for deleted rows is physically removed from the FULLTEXT index by an OPTIMIZE TABLE statement. See Optimizing InnoDB Full-Text Indexes for more information.

Example:

mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_DELETED;
+--------+
| DOC_ID |
+--------+
|      6 |
|      7 |
|      8 |
+--------+

Notes:


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