title: Generic Information Schema for multiple database
body: <p>I need to get the db table informations like columns detail, pk/uk/check/fk constraints etc. for popular databases (Oracle, MySql, MSSql , DB2 etc). I know each database provide some way or other to retreive the schema information. Does somebody know the generic way to collect the schema information from different databases (Some sort of API which reads different database information schema and create a generic information schema). </p>