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How to list PostgreSQL table constraints

13 May,2022 by Rambler

Question: How can I list the Constraints on a PostgreSQL table ? 

Answer: This script will list PostgreSQL constraints . It achieves the results  via the pg_catalog.pg_constraint   - which checks primary key, unique, foreign key, and exclusion constraints on tables.




SELECT con.* FROM pg_catalog.pg_constraint con

INNER JOIN pg_catalog.pg_class rel ON rel.oid = con.conrelid

INNER JOIN pg_catalog.pg_namespace nsp ON nsp.oid = connamespace

WHERE nsp.nspname = 'my_schema_name'

AND rel.relname = 'my_table_name';



PostgreSQL cheatsheet

Author: Rambler (


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