28.4.15 INFORMATION_SCHEMA INNODB_FT_CONFIG 表
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 17.15.4, “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 aFULLTEXT
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 anOPTIMIZE TABLE
run stops. -
synced_doc_id
: The nextDOC_ID
to be issued. -
stopword_table_name
: Thedatabase/table
name for a user-defined stopword table. TheVALUE
column is empty if there is no user-defined stopword table. -
use_stopword
: Indicates whether a stopword table is used, which is defined when theFULLTEXT
index is created.
-
-
VALUE
The value associated with the corresponding
KEY
column, reflecting some limit or current value for an aspect of aFULLTEXT
index for anInnoDB
table.
mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_CONFIG;
+---------------------------+-------------------+
| KEY | VALUE |
+---------------------------+-------------------+
| optimize_checkpoint_limit | 180 |
| synced_doc_id | 0 |
| stopword_table_name | test/my_stopwords |
| use_stopword | 1 |
+---------------------------+-------------------+
-
This table is intended only for internal configuration. It is not intended for statistical information purposes.
-
You must have the
PROCESS
privilege to query this table. -
Use the
INFORMATION_SCHEMA
COLUMNS
table or theSHOW 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 17.6.2.4, “InnoDB Full-Text Indexes”, and Section 14.9, “Full-Text Search Functions”.