diff --git a/system/database/drivers/oci8/oci8_utility.php b/system/database/drivers/oci8/oci8_utility.php
index 011e971..dc259ac 100644
--- a/system/database/drivers/oci8/oci8_utility.php
+++ b/system/database/drivers/oci8/oci8_utility.php
@@ -64,6 +64,21 @@
 		return FALSE;
 	}
 
+    // --------------------------------------------------------------------
+
+    /**
+     * Show table query
+     *
+     * Generates a platform-specific query string so that the table names can be fetched
+     *
+     * @access  private
+     * @return  string
+     */
+    function _list_tables()
+    {
+        return "select TABLE_NAME FROM ALL_TABLES";
+    }
+
 	// --------------------------------------------------------------------
 
 	/**
@@ -79,67 +94,6 @@
 
 	// --------------------------------------------------------------------
 
-    /**
-     * Version number query string
-     *
-     * @access  public
-     * @return  string
-     */
-    function _version()
-    {
-        return ociserverversion($this->conn_id);
-    }
-
-    // --------------------------------------------------------------------
-
-    /**
-     * Show table query
-     *
-     * Generates a platform-specific query string so that the table names can be fetched
-     *
-     * @access  public
-     * @return  string
-     */
-    function _show_tables()
-    {
-        return "select TABLE_NAME FROM ALL_TABLES";
-    }
-
-    // --------------------------------------------------------------------
-
-    /**
-     * Show columnn query
-     *
-     * Generates a platform-specific query string so that the column names can be fetched
-     *
-     * @access  public
-     * @param   string  the table name
-     * @return  string
-     */
-    function _show_columns($table = '')
-    {
-        return "SELECT COLUMN_NAME FROM all_tab_columns WHERE table_name = '$table'";
-    }
-
-    // --------------------------------------------------------------------
-
-    /**
-     * Field data query
-     *
-     * Generates a platform-specific query so that the column data can be retrieved
-     *
-     * @access  public
-     * @param   string  the table name
-     * @return  object
-     */
-    function _field_data($table)
-    {
-		return "SELECT * FROM ".$this->db->_escape_table($table)." where rownum = 1";
-    }
-
-
-	// --------------------------------------------------------------------
-
 	/**
 	 * Optimize table query
 	 *