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PostgreSQL Complete Course / Transactions & Locking

Advisory locks

Learn Advisory locks in PostgreSQL through the exact construct, a dedicated example, a boundary case, and a mastery check.

12 min read • Intermediate

Advisory locks is an atomic PostgreSQL lesson inside Transactions & Locking. The example uses the specific syntax, command, API, instruction, or language rule named by this lesson.

Study the construct itself, then change one relevant input and predict the result before running it. That keeps this lesson focused on Advisory locks rather than on generic PostgreSQL syntax.

Topic-specific example

postgresql-06-05.sql
sql Try It Live 
SELECT pg_advisory_lock(4242); SELECT pg_advisory_unlock(4242);
Edge case / engineering note

Test Advisory locks with an empty result, NULL/missing value, duplicate key, or concurrent operation where relevant; database behavior should be verified at the boundary shown by this example.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

Advisory locks Mastery Check →
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Deadlock example