adding support for error codes

MysqliDb.php

@@ -106,6 +106,13 @@ class MysqliDb
      */
     protected $_stmtError;
 
+    /**
+     * Variable which holds last statement error number
+     *
+     * @var int
+     */
+    protected $_stmtErrno;
+
     /**
      * Database credentials
      * @var string
@@ -393,6 +400,7 @@ class MysqliDb
         $stmt->execute();
         $this->count = $stmt->affected_rows;
         $this->_stmtError = $stmt->error;
+        $this->_stmtErrno = $stmt->errno;
         $this->_lastQuery = $this->replacePlaceHolders($this->_query, $params);
         $res = $this->_dynamicBindResults($stmt);
         $this->reset();
@@ -464,6 +472,7 @@ class MysqliDb
         $stmt = $this->_buildQuery($numRows);
         $stmt->execute();
         $this->_stmtError = $stmt->error;
+        $this->_stmtErrno = $stmt->errno;
         $res = $this->_dynamicBindResults($stmt);
         $this->reset();
 
@@ -555,6 +564,7 @@ class MysqliDb
 
         $stmt->execute();
         $this->_stmtError = $stmt->error;
+        $this->_stmtErrno = $stmt->errno;
         $res = $this->_dynamicBindResults($stmt);
         $this->reset();
 
@@ -676,6 +686,7 @@ class MysqliDb
         $status = $stmt->execute();
         $this->reset();
         $this->_stmtError = $stmt->error;
+        $this->_stmtErrno = $stmt->errno;
         $this->count = $stmt->affected_rows;
 
         return $status;
@@ -707,6 +718,7 @@ class MysqliDb
         $stmt = $this->_buildQuery($numRows);
         $stmt->execute();
         $this->_stmtError = $stmt->error;
+        $this->_stmtErrno = $stmt->errno;
         $this->reset();
 
         return ($stmt->affected_rows > 0);
@@ -1037,6 +1049,7 @@ class MysqliDb
         $stmt = $this->_buildQuery(null, $insertData);
         $status = $stmt->execute();
         $this->_stmtError = $stmt->error;
+        $this->_stmtErrno = $stmt->errno;
         $haveOnDuplicate = !empty ($this->_updateColumns);
         $this->reset();
         $this->count = $stmt->affected_rows;
@@ -1583,6 +1596,15 @@ class MysqliDb
         return trim($this->_stmtError . " " . $this->mysqli()->error);
     }
 
+    /**
+     * Method returns mysql error number
+     *
+     * @return int
+     */
+    public function getLastErrno () {
+        return $this->_stmtErrno;
+    }
+
     /**
      * Mostly internal method to get query and its params out of subquery object
      * after get() and getAll()