(mysql.info) show-index

 
 13.5.4.13 `SHOW INDEX' Syntax
 .............................
 
      SHOW INDEX FROM TBL_NAME [FROM DB_NAME]
 
 `SHOW INDEX' returns table index information.  The format resembles
 that of the `SQLStatistics' call in ODBC.
 
 `SHOW INDEX' returns the following fields:
 
    * `Table'
 
      The name of the table.
 
    * `Non_unique'
 
      0 if the index cannot contain duplicates, 1 if it can.
 
    * `Key_name'
 
      The name of the index.
 
    * `Seq_in_index'
 
      The column sequence number in the index, starting with 1.
 
    * `Column_name'
 
      The column name.
 
    * `Collation'
 
      How the column is sorted in the index. In MySQL, this can have
      values ‘`A'’ (Ascending) or `NULL' (Not sorted).
 
    * `Cardinality'
 
      An estimate of the number of unique values in the index.  This is
      updated by running `ANALYZE TABLE' or `myisamchk -a'.
      `Cardinality' is counted based on statistics stored as integers,
      so the value is not necessarily exact even for small tables. The
      higher the cardinality, the greater the chance that MySQL uses the
      index when doing joins.
 
    * `Sub_part'
 
      The number of indexed characters if the column is only partly
      indexed, `NULL' if the entire column is indexed.
 
    * `Packed'
 
      Indicates how the key is packed. `NULL' if it is not.
 
    * `Null'
 
      Contains `YES' if the column may contain `NULL'. If not, the
      column contains `NO' as of MySQL 5.0.3, and `''' before that.
 
    * `Index_type'
 
      The index method used (`BTREE', `FULLTEXT', `HASH', `RTREE').
 
    * `Comment'
 
      Various remarks.
 
 You can use DB_NAME.TBL_NAME as an alternative to the `TBL_NAME FROM
 DB_NAME' syntax. These two statements are equivalent:
 
      SHOW INDEX FROM mytable FROM mydb;
      SHOW INDEX FROM mydb.mytable;
 
 `SHOW KEYS' is a synonym for `SHOW INDEX'. You can also list a table's
 indexes with the `mysqlshow -k DB_NAME TBL_NAME' command.
Info Catalog
(mysql.info) show-grants
(mysql.info) show
(mysql.info) show-innodb-status
automatically generated byinfo2html