Professional services of migrating Oracle packages and stored procedures to PostgreSQL.
At the end of 2016 Ispirer Systems carried out migration services for one of the Russian system integrators. The Company is one of the leaders that provides integrated technology and services solutions for financial industry. Among its clients are large banks, insurance companies, treasuries, other financial organizations.
The Company was performing migration of Oracle database to PostgreSQL for one of its clients. To deliver the results within the tight deadline set by the Client the Company decided to partially delegate project implementation to an experienced partner.
As Ispirer Systems has great experience in successful migration projects implementation it has been involved in the project as a subcontractor.
Ispirer team concentrated on migration of more than 120 Oracle stored procedures with around 30 000 lines of code and several packages containing around 10 000 lines of code.
The migration stage of the Professional Services lasted for 4 weeks.
The optimal way of the migration services execution is by using Ispirer Migration and Modernization Toolkit (Ispirer MnMTK). As Ispirer MnMTK is a flexible tool, it can be quickly adjusted considering every source code peculiarities. Thorough source code analysis revealed the existence of some specific features in it. Ispirer team used different approaches for their conversion from Oracle to PostgreSQL.
1) The automatic conversion of the following statements was extended:
- User defined types;
- Oracle collections;
- Global Package variables;
- Hierarchical queries;
- Pipelined functions.
2) The migration of some objects was executed manually:
- PRAGMA AUTONOMOUS TRANSACTION;
- DBMS_LOCK_ALLOCATED system table emulation.
3) The specific solution for emulation of work of DBMS_LOCK package through DBLINK extension was created.
The converted results were delivered in due time and successfully imported to the SQL objects of the target database PostgreSQL. The 6-week acceptance stage passed in a regular mode.
Results & Advantages
With the help of Ispirer Systems the Company could perform the entire migration on time. Ispirer had another chance to prove experience and competence of its experts.