fix: fix discovering relations

Signed-off-by: Thomas Miliopoulos <github@thiscode.com>

Author: thiscode

lib/datasource.js

@@ -1764,7 +1764,7 @@ DataSource.prototype.discoverSchemas = function(tableName, options, cb) {
     if (followingRelations) {
       // Handle foreign keys
       const fks = {};
-      const foreignKeys = results[2] || [];
+      const foreignKeys = results[3] || [];
       foreignKeys.forEach(function(fk) {
         const fkInfo = {
           keySeq: fk.keySeq,