fix: Throw error if rows in limit is missing for expand, same as in l…

…imit() (#858)

OData requests like `$expand=xxx($skip=5)` currently fail, because rows
is missing which causes a TypeError on HANA. We already have a missing
rows check for limit(), so i added the same here.

hana/lib/HANAService.js

@@ -333,6 +333,7 @@ class HANAService extends SQLService {
       }
 
       let { limit, one, orderBy, expand, columns = ['*'], localized, count, parent } = q.SELECT
+
 
       // When one of these is defined wrap the query in a sub query
       if (expand || (parent && (limit || one || orderBy))) {
@@ -421,6 +422,11 @@ class HANAService extends SQLService {
         }
 
         if (parent && (limit || one)) {
+          if (limit && limit.rows == null) {
+            // same error as in limit(), but for limits in expand
+            throw new Error('Rows parameter is missing in SELECT.limit(rows, offset)')
+          }
+
           // Apply row number limits
           q.where(
             one