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25.39.14 The INFORMATION_SCHEMA INNODB_FT_CONFIG Table

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The INNODB_FT_CONFIG table provides metadata about the FULLTEXT index and associated processing for 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 15.14.4, “InnoDB INFORMATION_SCHEMA FULLTEXT Index Tables”.

The INNODB_FT_CONFIG table has these columns:

  • KEY

    The name designating an item of metadata for an InnoDB table containing a FULLTEXT index.

    The values for this column might change, depending on the needs for performance tuning and debugging for InnoDB full-text processing. The key names and their meanings include:

    • optimize_checkpoint_limit: The number of seconds after which an OPTIMIZE TABLE run stops.

    • synced_doc_id: The next DOC_ID to be issued.

    • stopword_table_name: The database/table name for a user-defined stopword table. The VALUE column is empty if there is no user-defined stopword table.

    • use_stopword: Indicates whether a stopword table is used, which is defined when the FULLTEXT index is created.

  • VALUE

    The value associated with the corresponding KEY column, reflecting some limit or current value for an aspect of a FULLTEXT index for an InnoDB table.

Example

  1. mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_CONFIG;
  2. +---------------------------+-------------------+
  3. | KEY                       | VALUE             |
  4. +---------------------------+-------------------+
  5. | optimize_checkpoint_limit | 180               |
  6. | synced_doc_id             | 0                 |
  7. | stopword_table_name       | test/my_stopwords |
  8. | use_stopword              | 1                 |
  9. +---------------------------+-------------------+

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Document created the 26/06/2006, last modified the 26/10/2018
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