181 lines
3.2 KiB
PHP
181 lines
3.2 KiB
PHP
<?php
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/**
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* Query
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*
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* Free Query Builder / Database Abstraction Layer
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*
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* @author Timothy J. Warren
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* @copyright Copyright (c) 2012
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* @link https://github.com/aviat4ion/Query
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* @license http://philsturgeon.co.uk/code/dbad-license
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* @package Query
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*/
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// --------------------------------------------------------------------------
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/**
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* Abstract parent for database manipulation subclasses
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*
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* @package Query
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* @subpackage Query
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*/
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abstract class DB_SQL {
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// --------------------------------------------------------------------------
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// ! Methods to override
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// --------------------------------------------------------------------------
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/**
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* Get the max keyword sql
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*
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* @return string
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*/
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public function max()
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{
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return ' MAX';
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}
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// --------------------------------------------------------------------------
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/**
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* Get the min keyword sql
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*
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* @return string
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*/
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public function min()
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{
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return ' MIN';
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}
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// --------------------------------------------------------------------------
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/**
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* Get the 'distinct' keyword
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*
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* @return string
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*/
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public function distinct()
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{
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return ' DISTINCT ';
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}
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// --------------------------------------------------------------------------
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/**
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* Get the 'average' keyword
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*
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* @return string
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*/
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public function avg()
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{
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return ' AVG';
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}
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// --------------------------------------------------------------------------
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/**
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* Get the 'sum' keyword
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*
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* @return string
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*/
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public function sum()
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{
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return ' SUM';
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}
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// --------------------------------------------------------------------------
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// ! Abstract Methods
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// --------------------------------------------------------------------------
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/**
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* Get database specific sql for limit clause
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*
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* @abstract
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* @param string $sql
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* @param int $limit
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* @param int $offset
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* @return string
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*/
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abstract public function limit($sql, $limit, $offset=FALSE);
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/**
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* Get the sql for random ordering
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*
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* @abstract
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* @return string
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*/
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abstract public function random();
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/**
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* Returns sql to list other databases
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*
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* @return string
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*/
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abstract public function db_list();
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/**
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* Returns sql to list tables
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*
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* @return string
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*/
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abstract public function table_list();
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/**
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* Returns sql to list system tables
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*
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* @return string
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*/
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abstract public function system_table_list();
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/**
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* Returns sql to list views
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*
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* @return string
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*/
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abstract public function view_list();
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/**
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* Returns sql to list triggers
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*
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* @return string
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*/
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abstract public function trigger_list();
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/**
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* Return sql to list functions
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*
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* @return FALSE
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*/
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abstract public function function_list();
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/**
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* Return sql to list stored procedures
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*
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* @return string
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*/
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abstract public function procedure_list();
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/**
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* Return sql to list sequences
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*
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* @return string
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*/
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abstract public function sequence_list();
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/**
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* Return sql to list database field types
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*
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* @return mixed
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*/
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abstract public function type_list();
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/**
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* Get information about the columns in the
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* specified table
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*
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* @param string
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* @return string
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*/
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abstract public function column_list($table);
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}
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// End of db_sql.php
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