fix: use DELETE instead of TRUNCATE for migration

Use DELETE instead of TRUNCATE to avoid requiring table ownership.
Wrap in DO block for better error handling and logging.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

prisma/migrations/20260122_fix_product_constructeurs_orientation/migration.sql

@@ -2,28 +2,48 @@
 -- Issue: Table was created with A=product, B=constructeur
 -- But Prisma expects alphabetical order: A=constructeur, B=product
 
--- Step 1: Save existing data to temp table
-CREATE TEMP TABLE _ProductConstructeurs_backup AS
-SELECT "A" as old_A, "B" as old_B FROM "_ProductConstructeurs";
+-- This migration swaps the A and B columns to fix the orientation
 
--- Step 2: Drop foreign key constraints
-ALTER TABLE "_ProductConstructeurs" DROP CONSTRAINT IF EXISTS "_ProductConstructeurs_A_fkey";
-ALTER TABLE "_ProductConstructeurs" DROP CONSTRAINT IF EXISTS "_ProductConstructeurs_B_fkey";
+DO $$
+DECLARE
+    backup_count INTEGER;
+BEGIN
+    -- Step 1: Create temp table with swapped data
+    CREATE TEMP TABLE IF NOT EXISTS _ProductConstructeurs_backup AS
+    SELECT "B" as new_A, "A" as new_B FROM "_ProductConstructeurs";
 
--- Step 3: Clear the table
-TRUNCATE TABLE "_ProductConstructeurs";
+    GET DIAGNOSTICS backup_count = ROW_COUNT;
+    RAISE NOTICE 'Backed up % rows', backup_count;
 
--- Step 4: Reinsert data with swapped columns (A and B inverted)
-INSERT INTO "_ProductConstructeurs" ("A", "B")
-SELECT old_B, old_A FROM _ProductConstructeurs_backup;
+    -- Step 2: Drop foreign key constraints
+    ALTER TABLE "_ProductConstructeurs" DROP CONSTRAINT IF EXISTS "_ProductConstructeurs_A_fkey";
+    ALTER TABLE "_ProductConstructeurs" DROP CONSTRAINT IF EXISTS "_ProductConstructeurs_B_fkey";
 
--- Step 5: Recreate foreign key constraints with correct orientation
-ALTER TABLE "_ProductConstructeurs"
-  ADD CONSTRAINT "_ProductConstructeurs_A_fkey"
-  FOREIGN KEY ("A") REFERENCES "constructeurs"("id")
-  ON DELETE CASCADE ON UPDATE CASCADE;
+    RAISE NOTICE 'Dropped foreign key constraints';
 
-ALTER TABLE "_ProductConstructeurs"
-  ADD CONSTRAINT "_ProductConstructeurs_B_fkey"
-  FOREIGN KEY ("B") REFERENCES "products"("id")
-  ON DELETE CASCADE ON UPDATE CASCADE;
+    -- Step 3: Clear the table
+    DELETE FROM "_ProductConstructeurs";
+
+    RAISE NOTICE 'Cleared table';
+
+    -- Step 4: Reinsert data with swapped columns
+    INSERT INTO "_ProductConstructeurs" ("A", "B")
+    SELECT new_A, new_B FROM _ProductConstructeurs_backup;
+
+    GET DIAGNOSTICS backup_count = ROW_COUNT;
+    RAISE NOTICE 'Reinserted % rows with swapped columns', backup_count;
+
+    -- Step 5: Recreate foreign key constraints with correct orientation
+    ALTER TABLE "_ProductConstructeurs"
+      ADD CONSTRAINT "_ProductConstructeurs_A_fkey"
+      FOREIGN KEY ("A") REFERENCES "constructeurs"("id")
+      ON DELETE CASCADE ON UPDATE CASCADE;
+
+    ALTER TABLE "_ProductConstructeurs"
+      ADD CONSTRAINT "_ProductConstructeurs_B_fkey"
+      FOREIGN KEY ("B") REFERENCES "products"("id")
+      ON DELETE CASCADE ON UPDATE CASCADE;
+
+    RAISE NOTICE 'Recreated foreign key constraints';
+    RAISE NOTICE 'Migration completed successfully';
+END $$;