PostgreSQL – How to List Tables Used by A View

ByAdmin

To list the tables used by a view in PostgreSQL, you can query the system catalog to inspect the view’s underlying SQL query. PostgreSQL stores view definitions in the pg_views system catalog table. Here’s how you can retrieve the tables used by a specific view:

SELECT table_name 
 FROM information_schema.tables 
 WHERE table_schema = 'public' 
  AND table_name IN ( SELECT regexp_replace(regexp_replace(view_definition, E'^.*\\bFROM\\s+', ''), '\\s.*$', '', 'g') AS table_name 
 FROM pg_views 
 WHERE viewname = 'your_view_name' );

Replace 'public' with the schema where your view is located. Replace 'your_view_name' with the name of the view you want to examine.

This query retrieves the names of tables used by the specified view by parsing the view definition and extracting table names from the FROM clause of the SQL query that defines the view. It then checks if those tables exist in the specified schema.

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