133 lines
2.8 KiB
PHP
133 lines
2.8 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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*/
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// --------------------------------------------------------------------------
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/**
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* MySQL specifc SQL
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*/
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class MySQL_SQL extends DB_SQL{
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/**
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* Convienience public function for creating a new MySQL table
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*
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* @param [type] $name [description]
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* @param [type] $columns [description]
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* @param array $constraints=array() [description]
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* @param array $indexes=array() [description]
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*
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* @return [type]
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*/
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public function create_table($name, $columns, array $constraints=array(), array $indexes=array())
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{
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$column_array = array();
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// Reorganize into an array indexed with column information
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// Eg $column_array[$colname] = array(
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// 'type' => ...,
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// 'constraint' => ...,
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// 'index' => ...,
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// )
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foreach($columns as $colname => $type)
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{
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if(is_numeric($colname))
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{
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$colname = $type;
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}
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$column_array[$colname] = array();
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$column_array[$colname]['type'] = ($type !== $colname) ? $type : '';
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}
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if( ! empty($constraints))
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{
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foreach($constraints as $col => $const)
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{
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$column_array[$col]['constraint'] = "{$const} ({$col})";
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}
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}
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// Join column definitons together
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$columns = array();
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foreach($column_array as $n => $props)
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{
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$n = trim($n, '`');
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$str = "`{$n}` ";
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$str .= (isset($props['type'])) ? "{$props['type']} " : "";
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$columns[] = $str;
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}
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// Add constraints
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foreach($column_array as $n => $props)
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{
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if (isset($props['constraint']))
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{
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$columns[] = $props['constraint'];
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}
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}
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// Generate the sql for the creation of the table
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$sql = "CREATE TABLE IF NOT EXISTS `{$name}` (";
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$sql .= implode(", ", $columns);
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$sql .= ")";
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return $sql;
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}
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// --------------------------------------------------------------------------
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/**
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* Convience public function for droping a MySQL table
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*
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* @param string $name
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* @return string
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*/
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public function delete_table($name)
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{
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return "DROP TABLE `{$name}`";
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}
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// --------------------------------------------------------------------------
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/**
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* Limit clause
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*
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* @param string $sql
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* @param int $limit
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* @param int $offset
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* @return string
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*/
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public function limit($sql, $limit, $offset=FALSE)
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{
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if ( ! is_numeric($offset))
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{
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return $sql." LIMIT {$limit}";
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}
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return $sql." LIMIT {$offset}, {$limit}";
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}
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// --------------------------------------------------------------------------
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/**
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* Random ordering keyword
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*
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* @return string
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*/
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public function random()
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{
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return ' RAND()';
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}
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}
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//End of mysql_sql.php
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