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106 lines
3.2 KiB
106 lines
3.2 KiB
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace Think\Db\Driver;
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use Think\Db\Driver;
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/**
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* Pgsql数据库驱动
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*/
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class Pgsql extends Driver
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{
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/**
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* 解析pdo连接的dsn信息
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* @access public
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* @param array $config 连接信息
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* @return string
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*/
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protected function parseDsn($config)
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{
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$dsn = 'pgsql:dbname=' . $config['database'] . ';host=' . $config['hostname'];
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if (!empty($config['hostport'])) {
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$dsn .= ';port=' . $config['hostport'];
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}
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return $dsn;
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}
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/**
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* 取得数据表的字段信息
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* @access public
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* @return array
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*/
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public function getFields($tableName)
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{
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list($tableName) = explode(' ', $tableName);
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$result = $this->query('select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg(\'' . $tableName . '\');');
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$info = array();
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if ($result) {
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foreach ($result as $key => $val) {
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$info[$val['field']] = array(
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'name' => $val['field'],
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'type' => $val['type'],
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'notnull' => (bool) ('' === $val['null']), // not null is empty, null is yes
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'default' => $val['default'],
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'primary' => (strtolower($val['key']) == 'pri'),
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'autoinc' => (strtolower($val['extra']) == 'auto_increment'),
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);
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}
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}
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return $info;
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}
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/**
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* 取得数据库的表信息
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* @access public
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* @return array
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*/
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public function getTables($dbName = '')
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{
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$result = $this->query("select tablename as Tables_in_test from pg_tables where schemaname ='public'");
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$info = array();
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foreach ($result as $key => $val) {
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$info[$key] = current($val);
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}
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return $info;
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}
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/**
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* limit分析
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* @access protected
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* @param mixed $lmit
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* @return string
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*/
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public function parseLimit($limit)
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{
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$limitStr = '';
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if (!empty($limit)) {
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$limit = explode(',', $limit);
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if (count($limit) > 1) {
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$limitStr .= ' LIMIT ' . $limit[1] . ' OFFSET ' . $limit[0] . ' ';
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} else {
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$limitStr .= ' LIMIT ' . $limit[0] . ' ';
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}
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}
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return $limitStr;
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}
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/**
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* 随机排序
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* @access protected
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* @return string
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*/
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protected function parseRand()
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{
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return 'RANDOM()';
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}
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}
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