•You must have the PROCESS  privilege to query this table. 

•Use the INFORMATION_SCHEMA COLUMNS  table or the SHOW COLUMNS  statement to view additional information about the columns of this table, including data types and default values. 

•For more information about InnoDB FULLTEXT  search, see Section 15.6.2.4, “InnoDB Full-Text Indexes” , and Section 12.10, “Full-Text Search Functions” . 

## 26.4.19 The INFORMATION_SCHEMA INNODB_FT_INDEX_TABLE Table 

The INNODB_FT_INDEX_TABLE  table provides information about the inverted index used to process text searches against the FULLTEXT  index of an InnoDB  table. 

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, test/articles ). 

For related usage information and examples, see Section 15.15.4, “InnoDB INFORMATION_SCHEMA FULLTEXT Index Tables” . 

The INNODB_FT_INDEX_TABLE  table has these columns: 

• WORD 

A word extracted from the text of the columns that are part of a FULLTEXT . 

• FIRST_DOC_ID 

The first document ID in which this word appears in the FULLTEXT  index. 

• LAST_DOC_ID 

The last document ID in which this word appears in the FULLTEXT  index. 

• DOC_COUNT 

The number of rows in which this word appears in the FULLTEXT  index. The same word can occur several times within the cache table, once for each combination of DOC_ID  and POSITION  values. 

• DOC_ID 

The document ID of the row containing the word. 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 contains no suitable column. 

• POSITION 

The position of this particular instance of the word within the relevant document identified by the DOC_ID value. 

## Notes 

•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, test/articles ). The following example demonstrates how to use the innodb_ft_aux_table  system variable to show information about a FULLTEXT  index for a specified table. Before information for newly inserted rows appears in INNODB_FT_INDEX_TABLE , the FULLTEXT index cache must be flushed to disk. This is accomplished by running an OPTIMIZE TABLE  operation 

