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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


by Laurenz Albe | 04.2023
  A while ago, I wrote about how difficult it is to get an execution plan for a parameterized query. […]

Row locks in PostgreSQL

by Laurenz Albe | 04.2023
  The PostgreSQL documentation has some information about row locks. But typically, you cannot see them in pg_locks, and not […]

Breaking your PostgreSQL database with bad CHECK constraints

by Laurenz Albe | 03.2023
  I am on a spree! After writing about breaking your database and transaction ID wraparound, here I am writing […]

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 […]
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