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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace think\db\connector;
use PDO;
use think\db\Connection;
/**
* Pgsql数据库驱动
*/
class Pgsql extends Connection
{
protected $builder = '\\think\\db\\builder\\Pgsql';
/**
* 解析pdo连接的dsn信息
* @access protected
* @param array $config 连接信息
* @return string
*/
protected function parseDsn($config)
{
$dsn = 'pgsql:dbname=' . $config['database'] . ';host=' . $config['hostname'];
if (!empty($config['hostport'])) {
$dsn .= ';port=' . $config['hostport'];
}
return $dsn;
}
/**
* 取得数据表的字段信息
* @access public
* @param string $tableName
* @return array
*/
public function getFields($tableName)
{
list($tableName) = explode(' ', $tableName);
$sql = '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 . '\');';
$pdo = $this->query($sql, [], false, true);
$result = $pdo->fetchAll(PDO::FETCH_ASSOC);
$info = [];
if ($result) {
foreach ($result as $key => $val) {
$val = array_change_key_case($val);
$info[$val['field']] = [
'name' => $val['field'],
'type' => $val['type'],
'notnull' => (bool) ('' !== $val['null']),
'default' => $val['default'],
'primary' => !empty($val['key']),
'autoinc' => (0 === strpos($val['extra'], 'nextval(')),
];
}
}
return $this->fieldCase($info);
}
/**
* 取得数据库的表信息
* @access public
* @param string $dbName
* @return array
*/
public function getTables($dbName = '')
{
$sql = "select tablename as Tables_in_test from pg_tables where schemaname ='public'";
$pdo = $this->query($sql, [], false, true);
$result = $pdo->fetchAll(PDO::FETCH_ASSOC);
$info = [];
foreach ($result as $key => $val) {
$info[$key] = current($val);
}
return $info;
}
/**
* SQL性能分析
* @access protected
* @param string $sql
* @return array
*/
protected function getExplain($sql)
{
return [];
}
protected function supportSavepoint()
{
return true;
}
}