InnoDB memcached Plugin Internals Table 15.29 config_options Columns Table 15.30 containers Columns 3385 Column Description name The name given to the container. If an  InnoDB table is not requested by name using  @@  notation, the  daemon_memcached  plugin uses the  InnoDB table with a  containers.name  value of  default . If there is no such entry, the first entry in the containers  table, ordered alphabetically by  name (ascending), determines the default  InnoDB  table. db_schema The name of the database where the  InnoDB  table resides. This is a required value. Column Description Name Name of the  memcached -related configuration option. The following configuration options are supported by the  config_options  table: • separator : Used to separate values of a long string into separate values when there are multiple  value_columns  defined. By default, the  separator  is a  |  character. For example, if you define  col1, col2  as value columns, and you define  |  as the separator, you can issue the following  memcached  command to insert values into  col1  and  col2 , respectively: set keyx 10 0 19 valuecolx|valuecoly valuecol1x  is stored in  col1  and  valuecoly is stored in  col2 . • table_map_delimiter : The character separating the schema name and the table name when you use the  @@  notation in a key name to access a key in a specific table. For example, @@t1.some_key  and  @@t2.some_key  have the same key value, but are stored in different tables. Value The value assigned to the  memcached -related configuration option. containers Table The  containers  table is the most important of the three configuration tables. Each  InnoDB  table that is used to store  memcached  values must have an entry in the  containers  table. The entry provides a mapping between  InnoDB  table columns and container table columns, which is required for  memcached  to work with  InnoDB  tables. The  containers  table contains a default entry for the  test.demo_test  table, which is created by the innodb_memcached_config.sql  configuration script. To use the  daemon_memcached  plugin with your own  InnoDB  table, you must create an entry in the  containers  table.