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Don Burleson Blog 







Oracle versioning tips

Oracle Database Tips by Donald BurlesonFebruary 1,  2015


One nice feature of pre-relational databases (IDMS) was the ability to create versions of data dictionary entities.  You could create versions of table definitions, table columns, as well as code versions, all managed and controlled within the database.

The lack of version support has been sorely missed, and it looks like Oracle 11g may be posturing themselves to implement versioning in Oracle 12g:

See editionable object tips

The Oracle 11g documentation notes that versioning may be called "edition-based" redefinition:

"Edition-based redefinition is not available in Oracle Database 11g Release 1 (11.1).

You cannot create an edition, an editioning view, or a cross-edition trigger; nor can you use the ENABLE EDITIONS clause in the CREATE USER and ALTER USER commands. "

Alex Fatkulin (the Oracle internals guru and heir-apparent to Steve Adams) has noted some preliminary internals for this edition-based Oracle versioning, and notes that there is a new object_type called "_current_edition_obj":


At this time, it appears that critical objects for versioning (table columns, tables) are not supported and that versionable objects only include assembly, function, library, package, package body, procedure, synonym, trigger, type, type body and views.

The ability to do version control within the Oracle database will bring them into the technology of the 1980's, and finally allow Oracle DBA to manage and control versions of schema objects, just like we did with IDMS back in the 1980's.




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