Tag: development

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PostgreSQL parallel query problems in JDBC and DBeaver

by Laurenz Albe | 01.2024
  I recently investigated a surprising behavior of the DBeaver database client in connection with PostgreSQL parallel query, which I'd […]

Broken foreign keys: how can that happen in PostgreSQL?

by Laurenz Albe | 12.2023
  One of the fundamental requirements for a relational database is that the transaction system always maintains consistency. That means […]

PostgreSQL hash index performance

by Laurenz Albe | 12.2023
  Among the many index types in PostgreSQL, the hash index is the most widely ignored. This came home to […]

Kubernetes: Running the CYBERTEC PostgreSQL operator

by Hans-Jürgen Schönig | 11.2023
Kubernetes is a powerful and popular container orchestration platform that offers numerous benefits for organisations and developers. Many companies out […]

Using multiple triggers on the same table in PostgreSQL

by Hans-Jürgen Schönig | 11.2023
“Developers, developers, developers, …” - let us not remind ourselves of this painful Microsoft presentation which was given by Mr […]

Exclusion constraints in PostgreSQL and a tricky problem

by Christoph Berg | 09.2023
Exclusion constraints are a feature that is not very well known, but can be used to implement highly sophisticated constraints. […]

Conditional foreign keys and polymorphism in SQL: 4 Methods

by Laurenz Albe | 08.2023
  This article is about the notoriously difficult problem of “conditional foreign keys”. In object-oriented programming languages, polymorphism is a […]

Indexing "LIKE" in PostgreSQL and Oracle

by Laurenz Albe | 08.2023
© Laurenz Albe 2023 Unless you use the binary collation, creating a b-tree index to support a LIKE condition in […]

Subqueries and performance in PostgreSQL

by Laurenz Albe | 07.2023
  SQL allows you to use subqueries almost anywhere where you could have a table or column name. All you […]

Unexpected downsides of UUID keys in PostgreSQL

by Ants Aasma | 06.2023
There are various compelling reasons to use universally unique identifiers (UUID) as primary keys. Two examples are: To be able […]
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