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Laurenz Albe

Senior Consultant & Support Engineer
Laurenz Albe is a senior consultant and support engineer at CYBERTEC. He has been working with and contributing to PostgreSQL since 2006, has written patches for core, and wrote oracle_fdw. He holds a Master's degree in Mathematics from the University of Vienna and a Master's in Computer Science from the Technical University of Vienna. In his spare time he enjoys reading to his children and pondering the roots of language.
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Articles by Laurenz Albe

Transaction ID wraparound: a walk on the wild side

by Laurenz Albe | 01.2023
  Most people are aware of transaction ID wraparound. The concept has been well explained in Hans' article, so I […]

A unique constraint where NULL conflicts with everything

by Laurenz Albe | 01.2023
  I have been faced with a request for an unusual unique constraint that puzzled me for a while. Since […]

Pagination and the problem of the total result count

by Laurenz Albe | 01.2023
  When processing a big result set in an interactive application, you want to paginate the result set, that is, […]

UNION ALL, data types and performance

by Laurenz Albe | 12.2022
  A while ago, I wrote about the performance impact of query parameter data types. Recently I encountered a similar […]

EXPLAIN that parameterized statement in PostgreSQL!

by Laurenz Albe | 11.2022
  For detailed query performance analysis, you need EXPLAIN (ANALYZE, BUFFERS) output for an SQL statement. With a parameterized statement, […]

Rewrite OR to UNION in PostgreSQL queries

by Laurenz Albe | 11.2022
  In my article that reviles OR, I showed how in certain cases, it is possible to rewrite OR in […]

Why are my PostgreSQL updates getting slower?

by Laurenz Albe | 10.2022
  Recently, a customer asked me why a bulk load into a PostgreSQL table kept slowing down as time went […]

How to corrupt your PostgreSQL database

by Laurenz Albe | 08.2022
Of course most people do not want to corrupt their databases. These people will profit from avoiding the techniques used […]

Better SQL functions in PostgreSQL v14

by Laurenz Albe | 07.2022
We all know and value SQL functions as a handy shortcut. PostgreSQL v14 has introduced a new, better way to […]

Transaction anomalies with SELECT FOR UPDATE

by Laurenz Albe | 06.2022
  I was recently confronted with a nice example of how adding FOR UPDATE to a query can introduce transaction […]
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