The INFORMATION_SCHEMA INNODB_FT_INDEX_TABLE Table

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

This table is only accessible to users with the SUPER privilege. Before you query this table, set 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.

Table 18.18. INNODB_FT_INDEX_TABLE Columns

Column name	Description
WORD	A word extracted from the text of the columns that are part of a FULLTEXT.
FIRST_DOC_ID	The first document ID that this word appears in in the FULLTEXT index.
LAST_DOC_ID	The last document ID that this word appears in in the FULLTEXT index.
DOC_COUNT	The number of rows this word appears in 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 does not contain a 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 initially appears empty, until you set the value of the configuration variable innodb_ft_aux_table.
  
  
• You must have the PROCESS privilege to query this table.
  
  
• For more information, see , "Full-Text Search Functions".
  
  

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