diff --git a/src/WPDO.php b/src/WPDO.php
index 2f23c86..3266749 100644
--- a/src/WPDO.php
+++ b/src/WPDO.php
@@ -108,11 +108,18 @@ class WPDO {
         
     }
     
-    public function select_to_array($fields, $where_sql, $values) {
+    public function select_to_array($fields=[], $where_sql='', $values=[]) {
+        
+        if(count($fields)==0) {
+            
+            $fields=$this->table->fields;
+            
+        }
+        
         
         if($this->select($fields, $where_sql, $values)) {
         
-            return $this->sth->fetchAll();
+            return $this->sth->fetchAll(\PDO::FETCH_ASSOC);
             
         }
         else {
@@ -123,7 +130,13 @@ class WPDO {
         
     }
 
-    public function select_a_row($fields, $where_sql, $values) {
+    public function select_a_row($fields, $where_sql='', $values=[]) {
+        
+        if(count($fields)==0) {
+            
+            $fields=$this->table->fields;
+            
+        }
         
         if($this->select($fields, $where_sql.' limit 1', $values)) {
         
@@ -134,6 +147,8 @@ class WPDO {
                 return $rows[0];
                 
             }
+            
+            return false;
         
         }
         else {
@@ -175,7 +190,7 @@ class WPDO {
         
         if(count($fields)!=count($values)) {
             
-            throw new Exception('No valid values for insert in '.$this->table->name);
+            throw new \Exception('No valid values for insert in '.$this->table->name);
             
         }
         
@@ -195,7 +210,7 @@ class WPDO {
         
         if(count($fields)!=count($values_update)) {
             
-            throw new Exception('No valid values for insert in '.$this->table->name);
+            throw new \Exception('No valid values for insert in '.$this->table->name);
             
         }