Query/drivers/firebird_sql.php

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2012-03-15 09:25:18 -04:00
<?php
/**
* Query
*
* Free Query Builder / Database Abstraction Layer
*
* @author Timothy J. Warren
* @copyright Copyright (c) 2012
* @link https://github.com/aviat4ion/Query
* @license http://philsturgeon.co.uk/code/dbad-license
*/
// --------------------------------------------------------------------------
/**
* Firebird Specific SQL
*/
class Firebird_SQL extends DB_SQL {
/**
* Convienience public function to generate sql for creating a db table
*
* @param string $name
* @param array $fields
* @param array $constraints=array()
* @param array $indexes=array()
*
* @return string
*/
public function create_table($name, $fields, array $constraints=array(), array $indexes=array())
{
$column_array = array();
// Reorganize into an array indexed with column information
// Eg $column_array[$colname] = array(
// 'type' => ...,
// 'constraint' => ...,
// 'index' => ...,
// )
foreach($fields as $colname => $type)
{
if(is_numeric($colname))
{
$colname = $type;
}
$column_array[$colname] = array();
$column_array[$colname]['type'] = ($type !== $colname) ? $type : '';
}
if( ! empty($constraints))
{
foreach($constraints as $col => $const)
{
$column_array[$col]['constraint'] = $const;
}
}
// Join column definitons together
$columns = array();
foreach($column_array as $n => $props)
{
$str = '"'.$n.'" ';
$str .= (isset($props['type'])) ? "{$props['type']} " : "";
$str .= (isset($props['constraint'])) ? "{$props['constraint']} " : "";
$columns[] = $str;
}
// Generate the sql for the creation of the table
$sql = 'CREATE TABLE "'.$name.'" (';
$sql .= implode(',', $columns);
$sql .= ')';
return $sql;
}
// --------------------------------------------------------------------------
/**
* Drop the selected table
*
* @param string $name
* @return string
*/
public function delete_table($name)
{
return 'DROP TABLE "'.$name.'"';
}
// --------------------------------------------------------------------------
/**
* Limit clause
*
* @param string $sql
* @param int $limit
* @param int $offset
* @return string
*/
public function limit($sql, $limit, $offset=FALSE)
{
// Keep the current sql string safe for a moment
$orig_sql = $sql;
$sql = 'FIRST '. (int) $limit;
if ($offset > 0)
{
$sql .= ' SKIP '. (int) $offset;
}
$sql = preg_replace("`SELECT`i", "SELECT {$sql}", $orig_sql);
return $sql;
}
// --------------------------------------------------------------------------
/**
* Random ordering keyword
*
* @return string
*/
public function random()
{
return FALSE;
}
}
//End of firebird_sql.php