- Modify import scripts to handle edge cases with empty arrays and null conditions

- Improve parameter handling in incremental update queries for purchase orders and products

inventory-server/scripts/import/orders.js

@@ -222,10 +222,10 @@ async function importOrders(prodConnection, localConnection, incrementalUpdate =
 
     // Pre-check all products at once instead of per batch
     const allOrderPids = [...new Set(orderItems.map(item => item.pid))];
-    const [existingProducts] = await localConnection.query(
+    const [existingProducts] = allOrderPids.length > 0 ? await localConnection.query(
       "SELECT pid FROM products WHERE pid IN (?)",
       [allOrderPids]
-    );
+    ) : [[]];
     const existingPids = new Set(existingProducts.map(p => p.pid));
 
     // Process in larger batches
@@ -312,8 +312,15 @@ async function importOrders(prodConnection, localConnection, incrementalUpdate =
     // Import missing products if any
     if (missingProducts.size > 0) {
       try {
+        // Setup temporary tables again since they were dropped
+        await setupTemporaryTables(localConnection);
+        await materializeCalculations(prodConnection, localConnection);
+        
         await importMissingProducts(prodConnection, localConnection, Array.from(missingProducts));
         
+        // Clean up temporary tables after missing products import
+        await cleanupTemporaryTables(localConnection);
+        
         // Retry skipped orders after importing products
         if (skippedOrders.size > 0) {
           outputProgress({
@@ -322,7 +329,8 @@ async function importOrders(prodConnection, localConnection, incrementalUpdate =
             message: `Retrying import of ${skippedOrders.size} orders with previously missing products`
           });
 
-          const [skippedProdOrders] = await prodConnection.query(`
+          const skippedOrdersArray = Array.from(skippedOrders);
+          const [skippedProdOrders] = skippedOrdersArray.length > 0 ? await prodConnection.query(`
             SELECT
               o.order_id,
               CASE 
@@ -353,7 +361,7 @@ async function importOrders(prodConnection, localConnection, incrementalUpdate =
             FROM order_items oi
             JOIN _order o ON oi.order_id = o.order_id
             WHERE o.order_id IN (?)
-          `, [Array.from(skippedOrders)]);
+          `, [skippedOrdersArray]) : [[]];
 
           // Prepare values for insertion
           const skippedOrderValues = skippedProdOrders.flatMap(order => {
@@ -420,7 +428,7 @@ async function importOrders(prodConnection, localConnection, incrementalUpdate =
       }
     }
 
-    // Update sync status - do this even if missing products import fails
+    // Only update sync status if we get here (no errors thrown)
     await localConnection.query(`
       INSERT INTO sync_status (table_name, last_sync_timestamp)
       VALUES ('orders', NOW())