The first release of Pyrseas was aimed at addressing the essential version control issues described in my first posts. The second release, somewhat accidentally, has focused on being able to recreate the PostgreSQL autodoc regression database. In addition, Pyrseas will be released on the PostgreSQL Extension Network (PGXN).
Pyrseas already supports the basic schema, table, column, primary key, foreign key and index CREATE and ALTER operations provided by PostgreSQL (and every relational DBMS worthy of that designation). Here is a summary of PostgreSQL features that will be supported in the upcoming release:
- COMMENTs on schemas, tables, columns and functions.
- FOREIGN KEY ON UPDATE and ON DELETE actions.
- ALTER TABLE RENAME COLUMN and enhanced support for other ALTER object RENAME statements.
- INHERITed tables, and by extension, partitioned tables.
- PROCEDURAL LANGUAGEs
Support for some of these features is still elementary. However, the Pyrseas utilities are now able to recreate the autodoc database and revert back to an empty database, i.e., they also know how to drop each object in the correct order.
The Pyrseas unit tests have also been enhanced so they can be run against different PostgreSQL installations. For example, using the PYRSEAS_TEST_PORT environment variable I was able to run the tests against the 9.1 Beta 1 release, as well as 9.0 and 8.4.
Looking forward, the subsequent release will tackle being able to recreate the Pagila sample database, thus adding support for TYPEs, DOMAINs, AGGREGATEs, TRIGGERs and RULEs, and improving support for existing features.