Add abstract class for sql classes to have base limit method

classes/abstract_sql.php

@@ -0,0 +1,45 @@
+<?php
+/**
+ * Query
+ *
+ * Free Query Builder / Database Abstraction Layer
+ *
+ * @author		Timothy J. Warren
+ * @copyright	Copyright (c) 2012 - 2014
+ * @link 		https://github.com/aviat4ion/Query
+ * @license		http://philsturgeon.co.uk/code/dbad-license
+ * @package		Query
+ */
+
+// --------------------------------------------------------------------------
+
+/**
+ * parent for database manipulation subclasses
+ *
+ * @package Query
+ * @subpackage Query
+ */
+abstract class Abstract_SQL implements iSQL {
+
+	/**
+	 * Limit clause
+	 *
+	 * @param string $sql
+	 * @param int $limit
+	 * @param int $offset
+	 * @return string
+	 */
+	public function limit($sql, $limit, $offset=FALSE)
+	{
+		$sql .= "\nLIMIT {$limit}";
+
+		if (is_numeric($offset))
+		{
+			$sql .= " OFFSET {$offset}";
+		}
+
+		return $sql;
+	}
+
+}
+// End of abstract_sql.php

classes/isql.php

@@ -19,7 +19,7 @@
  * @package Query
  * @subpackage Query
  */
-interface iDB_SQL {
+interface iSQL {
 
 	/**
 	 * Get database specific sql for limit clause
@@ -121,4 +121,4 @@ interface iDB_SQL {
 	public function column_list($table);
 
 }
-// End of db_sql.php
+// End of isql.php

drivers/firebird/firebird_sql.php

@@ -19,7 +19,7 @@
  * @package Query
  * @subpackage Drivers
  */
-class Firebird_SQL implements iDB_SQL {
+class Firebird_SQL extends Abstract_SQL {
 
 	/**
 	 * Limit clause

drivers/mysql/mysql_sql.php

@@ -19,7 +19,7 @@
  * @package Query
  * @subpackage Drivers
  */
-class MySQL_SQL implements iDB_SQL {
+class MySQL_SQL extends Abstract_SQL {
 
 	/**
 	 * Limit clause

drivers/pgsql/pgsql_sql.php

@@ -18,29 +18,7 @@
  * @package Query
  * @subpackage Drivers
  */
-class PgSQL_SQL implements iDB_SQL {
+class PgSQL_SQL extends Abstract_SQL {
-
-	/**
-	 * Limit clause
-	 *
-	 * @param string $sql
-	 * @param int $limit
-	 * @param int $offset
-	 * @return string
-	 */
-	public function limit($sql, $limit, $offset=FALSE)
-	{
-		$sql .= " LIMIT {$limit}";
-
-		if(is_numeric($offset))
-		{
-			$sql .= " OFFSET {$offset}";
-		}
-
-		return $sql;
-	}
-	
-	// --------------------------------------------------------------------------
 
 	/**
 	 * Get the query plan for the sql query

drivers/sqlite/sqlite_sql.php

@@ -19,29 +19,7 @@
  * @package Query
  * @subpackage Drivers
  */
-class SQLite_SQL implements iDB_SQL {
+class SQLite_SQL extends Abstract_SQL {
-
-	/**
-	 * Limit clause
-	 *
-	 * @param string $sql
-	 * @param int $limit
-	 * @param int $offset
-	 * @return string
-	 */
-	public function limit($sql, $limit, $offset=FALSE)
-	{
-		$sql .= "\nLIMIT {$limit}";
-
-		if (is_numeric($offset))
-		{
-			$sql .= " OFFSET {$offset}";
-		}
-
-		return $sql;
-	}
-
-	// --------------------------------------------------------------------------
 
 	/**
 	 * Get the query plan for the sql query