https://kb.askmonty.org/en/index-condition-pushdown/ The link to batched key access is missing Also, I've not found any documentation relating to BKA in the KB - I think this needs to be fixed cheers, -colin -- Colin Charles, http://bytebot.net/blog/ | twitter: @bytebot | skype: colincharles MariaDB: Community developed. Feature enhanced. Backward compatible. Download it at: http://www.mariadb.org/ Open MariaDB/MySQL documentation at the Knowledgebase: http://kb.askmonty.org/