PostgreSQL-Abfragepläne verstehen (clt26) episode artwork

EPISODE · Mar 29, 2026 · 46 MIN

PostgreSQL-Abfragepläne verstehen (clt26)

from Chaos Computer Club - recent events feed · host Tim Lehner

PostgreSQL ist eine moderne relationale Datenbank unter Open-Source-Lizenz, die vielseitig und weit verbreitet ist. Bei deren Nutzung will – oder muss – man aus verschiedenen Gründen hin und wieder SQL-Abfragen optimieren. Dabei sollte jedoch erst einmal klar werden, wie das Datenbanksystem die jeweilige Abfrage ausführt, und wie es zu dieser Entscheidung gekommen ist. Das »Explain«-Kommando liefert dafür den Abfrageplan (Query Plan), der jedoch auch erst einmal verstanden werden will. Der Vortrag soll zeigen, wie PostgreSQL Query Plans gelesen und verstanden werden können. Dabei lernt man auch ein wenig davon, wie PostgreSQL unter der Haube Daten speichert und abruft. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://chemnitzer.linux-tage.de/2026/de/programm/beitrag/283

PostgreSQL ist eine moderne relationale Datenbank unter Open-Source-Lizenz, die vielseitig und weit verbreitet ist. Bei deren Nutzung will – oder muss – man aus verschiedenen Gründen hin und wieder SQL-Abfragen optimieren. Dabei sollte jedoch erst einmal klar werden, wie das Datenbanksystem die jeweilige Abfrage ausführt, und wie es zu dieser Entscheidung gekommen ist. Das »Explain«-Kommando liefert dafür den Abfrageplan (Query Plan), der jedoch auch erst einmal verstanden werden will. Der Vortrag soll zeigen, wie PostgreSQL Query Plans gelesen und verstanden werden können. Dabei lernt man auch ein wenig davon, wie PostgreSQL unter der Haube Daten speichert und abruft. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://chemnitzer.linux-tage.de/2026/de/programm/beitrag/283

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PostgreSQL-Abfragepläne verstehen (clt26)

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This episode was published on March 29, 2026.

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PostgreSQL ist eine moderne relationale Datenbank unter Open-Source-Lizenz, die vielseitig und weit verbreitet ist. Bei deren Nutzung will – oder muss – man aus verschiedenen Gründen hin und wieder SQL-Abfragen optimieren. Dabei sollte jedoch erst...

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