Add table size script for postgres

Author: laurentS

postgres/scripts/show_table_sizes.sql

@@ -0,0 +1,17 @@
+-- Show a list of biggest tables and indices
+-- ordered by decreasing size.
+-- Runs instantly.
+SELECT
+  schema_name,
+  relname,
+  pg_size_pretty(table_size) AS size,
+  table_size
+FROM (
+       SELECT
+         pg_catalog.pg_namespace.nspname           AS schema_name,
+         relname,
+         pg_relation_size(pg_catalog.pg_class.oid) AS table_size
+       FROM pg_catalog.pg_class
+         JOIN pg_catalog.pg_namespace ON relnamespace = pg_catalog.pg_namespace.oid
+     ) t
+WHERE schema_name = 'public' AND table_size > 0 ORDER BY table_size DESC;