Abstract: Methods, systems and program storage devices for managing schema changes made by a user to an object in a database. The method including: (a) intercepting a database command entered by said user; (b) if said database command is a schema change command referencing said object in said database and a registry criterion is met, then inserting said database command or a command derived therefrom into a registered storage, otherwise releasing said database command to said database for execution thereby; (c) releasing said database command or a command derived therefrom from said registered storage to said database for execution thereby when a release criterion is met thus giving rise to a released command; and (d) inserting said released command or a command derived therefrom into a history storage.

Abstract: A database system includes: a first database having back-end functionality for data storage and database query execution, a database front-end and an interception unit. The database front-end is configured for processing user queries directed to a back-end of a second database, and lacks the capabilities for directly accessing the first database. The interception unit is networked with the first database over a data network, and is configured for monitoring user queries under processing by the front-end to identify queries pertaining to data stored in the first database, and redirecting the identified queries to the first database for execution. Thereby the functionality of the database front-end is provided for data stored in the first database.

Abstract: Methods, systems and program storage devices for managing schema changes made by a user to an object in a database. The method including: (a) intercepting a database command entered by said user; (b) if said database command is a schema change command referencing said object in said database and a registry criterion is met, then inserting said database command or a command derived therefrom into a registered storage, otherwise releasing said database command to said database for execution thereby; (c) releasing said database command or a command derived therefrom from said registered storage to said database for execution thereby when a release criterion is met thus giving rise to a released command; and (d) inserting said released command or a command derived therefrom into a history storage.