added check script for pk on all tables (required for logical replication)

sql/check_all_tables_has_pk.sql

@@ -0,0 +1,17 @@
+SELECT
+    n.nspname AS schema,
+    c.relname AS relname
+FROM pg_catalog.pg_class c
+LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
+WHERE
+    c.relkind = 'r'::"char"
+    AND n.nspname NOT LIKE 'pg_%' AND n.nspname<>'_slony' AND n.nspname<>'information_schema'
+    AND NOT EXISTS (
+        SELECT
+        FROM pg_catalog.pg_constraint
+        WHERE
+            pg_catalog.pg_constraint.contype='p'
+            AND pg_catalog.pg_constraint.conrelid=c.oid
+         )
+ORDER BY 1,2
+