Tag Archives: function

Understanding Volatility in PL/pgSQL Functions: A Real-World Lesson

Posted on November 10, 2024 by Deepak Mahto

The PL/pgSQL language in PostgreSQL allows developers to create complex database functions with prescribed volatility categories: IMMUTABLE, STABLE, and VOLATILE. Selecting the right volatility is crucial for maintaining performance and data consistency, especially during migrations from other databases. Careful consideration prevents unexpected results and enhances application reliability. Continue reading →

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Migration of Function with Out Params to Postgres from Oracle.

Posted on April 15, 2020 by Deepak Mahto

Function play a pivotal roles for building business logic in Postgres, till Postgres 11 all the business logic need to compiled into Function only, though with Procedure in Postgres has it own use-case. Today’s we will cover scenario of a … Continue reading →

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Migrate Function in the WITH clause in Oracle to PostgreSQL.

Posted on November 24, 2019 by Deepak Mahto

With Oracle to PostgreSQL migration to tends to learn so many interesting facts about both RDBMS database. With Oracle we have enhancement related to SQL-PLSQL and as part of these blog series will like to publish how to achieve same … Continue reading →

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Streamline Your PostgreSQL Migration from Oracle with Automated Procedural Code Conversion Sanity Testing.

Posted on October 3, 2019 by Deepak Mahto

One of the key difference, we need to consider while migrating Oracle to PostgreSQL is compilation of Procedural code.Its behavior with regards to Exceptions during compile time varies between both the databases. PostgreSQL has its own behavior while creating Function … Continue reading →

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Date Generator in SQL Server using Recursive With Clause.

Posted on April 5, 2017 by Deepak Mahto

During one of performance analysis, identified lofty insert statements populating static tables with Date information. As part of one of functionality, we were generating dates and applying necessary function on it within date range specified. As part of performance improvement, … Continue reading →

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