Fixing issue discovered by test case.

packages/server/src/integrations/postgres.ts

@@ -99,6 +99,7 @@ module PostgresModule {
   async function internalQuery(client: any, query: SqlQuery) {
     // need to handle a specific issue with json data types in postgres,
     // new lines inside the JSON data will break it
+    if (query && query.sql) {
       const matches = query.sql.match(JSON_REGEX)
       if (matches && matches.length > 0) {
         for (let match of matches) {
@@ -106,6 +107,7 @@ module PostgresModule {
           query.sql = query.sql.replace(match, escaped)
         }
       }
+    }
     try {
       return await client.query(query.sql, query.bindings || [])
     } catch (err) {