Add safety checks before dropping payments table and policies

Author: ralyodio

supabase/migrations/20250427195500_drop_payments_table.sql

@@ -1,14 +1,49 @@
--- Drop foreign key constraints first
-ALTER TABLE IF EXISTS payments
-  DROP CONSTRAINT IF EXISTS payments_subscription_id_fkey;
+-- Check if the payments table exists before trying to drop it
+DO $$
+BEGIN
+    -- Check if the table exists
+    IF EXISTS (
+        SELECT FROM pg_tables
+        WHERE schemaname = 'public'
+        AND tablename = 'payments'
+    ) THEN
+        -- Drop foreign key constraints first
+        ALTER TABLE IF EXISTS payments
+        DROP CONSTRAINT IF EXISTS payments_subscription_id_fkey;
 
--- Drop the payments table
-DROP TABLE IF EXISTS payments;
+        -- Drop the payments table
+        DROP TABLE IF EXISTS payments;
+    END IF;
 
--- Drop any related policies
-DROP POLICY IF EXISTS payments_select_policy ON payments;
-DROP POLICY IF EXISTS payments_insert_policy ON payments;
-DROP POLICY IF EXISTS payments_all_policy ON payments;
+    -- Check if policies exist before dropping them
+    IF EXISTS (
+        SELECT FROM pg_policies
+        WHERE schemaname = 'public'
+        AND tablename = 'payments'
+        AND policyname = 'payments_select_policy'
+    ) THEN
+        DROP POLICY IF EXISTS payments_select_policy ON payments;
+    END IF;
+
+    IF EXISTS (
+        SELECT FROM pg_policies
+        WHERE schemaname = 'public'
+        AND tablename = 'payments'
+        AND policyname = 'payments_insert_policy'
+    ) THEN
+        DROP POLICY IF EXISTS payments_insert_policy ON payments;
+    END IF;
+
+    IF EXISTS (
+        SELECT FROM pg_policies
+        WHERE schemaname = 'public'
+        AND tablename = 'payments'
+        AND policyname = 'payments_all_policy'
+    ) THEN
+        DROP POLICY IF EXISTS payments_all_policy ON payments;
+    END IF;
+END
+$$;
 
 -- Comment explaining the migration
 COMMENT ON SCHEMA public IS 'Removed payments table as CryptAPI integration has been deprecated';