the old key compare function uses extra context: the bdb_return_if_eq and insert_or_update.  this will not work in tokudb as keys are compared after the insert has already completed.  

the bdb_return_if_eq will be replaced with some new cursor operations.  the insert_or_update feature applies to varchar keys (and is not compiled into the 5.1.22 code).



git-svn-id: file:///svn/mysql/tokudb-engine/src@2400 c7de825b-a66e-492c-adef-691d508d4ae1