PGConf.Russia 2023

One of the main problems when migrating from Oracle to PostgreSQL is PL/SQL packages.

The PostgreSQL DBMS lacks such functionality - this leads to the need to rewrite (up to its redesign!) the Oracle PL/SQL code to PL/pgSQL.

With the new version of its flagship Postgres Pro 15 Enterpise distribution, Postgres Pro has added support for package functionality: the PL/pgSQL syntax has been extended and new mechanisms have been added to the stored procedure runtime environment. The report will focus on supporting the functionality of packages in Postgres Pro 15 Enterpise: - grouping types of variable procedures and functions into a package; - support for the package initialization section; - support for global package variables available throughout the "life" of the session.

This presentation will also discuss the features of migration of packages from Oracle to Postgres Pro Enterprise DBMS.

ORM libraries are widely used in backend development – let's take this for granted. ORM libraries are improving, developers are learning from their own and others' mistakes, and many have learned to write code for ORM that generates quite optimal queries for typical operations. Yet, limited functionality of existing tools is another problem related to ORM. This is especially true for Postgres, which has a lot of operators and constructs (both in the core and in extensions) that go beyond the SQL standard.

With LinqToDb ORM library you can write extensions that implement any SQL operator or construct very easy, literally using just one line. Full-text search, KNN, CTE (including recursive ones), working with arrays and jsonb, array_agg and jsonb_object_agg, table functions and LATERAL JOIN - all this can be easily used in ORM, which I will demonstrate during this talk!

How to thoughtfully recover corrupt data...