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<?php |
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// +---------------------------------------------------------------------- |
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// | ThinkPHP [ WE CAN DO IT JUST THINK ] |
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// +---------------------------------------------------------------------- |
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// | Copyright (c) 2006~2019 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 <[email protected]> |
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// +---------------------------------------------------------------------- |
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declare (strict_types = 1); |
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namespace think\db\connector; |
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use PDO; |
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use think\db\Connection; |
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/** |
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* mysql��ݿ���� |
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*/ |
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class Mysql extends Connection |
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{ |
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/** |
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* ���pdo���ӵ�dsn��Ϣ |
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* @access protected |
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* @param array $config ������Ϣ |
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* @return string |
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*/ |
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protected function parseDsn(array $config): string |
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{ |
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if (!empty($config['socket'])) { |
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$dsn = 'mysql:unix_socket=' . $config['socket']; |
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} elseif (!empty($config['hostport'])) { |
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$dsn = 'mysql:host=' . $config['hostname'] . ';port=' . $config['hostport']; |
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} else { |
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$dsn = 'mysql:host=' . $config['hostname']; |
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} |
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$dsn .= ';dbname=' . $config['database']; |
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if (!empty($config['charset'])) { |
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$dsn .= ';charset=' . $config['charset']; |
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} |
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return $dsn; |
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} |
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/** |
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* ȡ����ݱ���ֶ���Ϣ |
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* @access public |
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* @param string $tableName |
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* @return array |
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*/ |
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public function getFields(string $tableName): array |
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{ |
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list($tableName) = explode(' ', $tableName); |
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if (false === strpos($tableName, '`')) { |
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if (strpos($tableName, '.')) { |
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$tableName = str_replace('.', '`.`', $tableName); |
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} |
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$tableName = '`' . $tableName . '`'; |
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} |
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$sql = 'SHOW COLUMNS FROM ' . $tableName; |
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$pdo = $this->getPDOStatement($sql); |
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$result = $pdo->fetchAll(PDO::FETCH_ASSOC); |
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$info = []; |
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if (!empty($result)) { |
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foreach ($result as $key => $val) { |
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$val = array_change_key_case($val); |
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$info[$val['field']] = [ |
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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 $this->fieldCase($info); |
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} |
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/** |
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* ȡ����ݿ�ı���Ϣ |
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* @access public |
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* @param string $dbName |
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* @return array |
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*/ |
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public function getTables(string $dbName = ''): array |
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{ |
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$sql = !empty($dbName) ? 'SHOW TABLES FROM ' . $dbName : 'SHOW TABLES '; |
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$pdo = $this->getPDOStatement($sql); |
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$result = $pdo->fetchAll(PDO::FETCH_ASSOC); |
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$info = []; |
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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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* SQL���ܷ�� |
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* @access protected |
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* @param string $sql |
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* @return array |
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*/ |
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protected function getExplain(string $sql): array |
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{ |
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$pdo = $this->linkID->query("EXPLAIN " . $sql); |
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$result = $pdo->fetch(PDO::FETCH_ASSOC); |
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$result = array_change_key_case($result); |
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if (isset($result['extra'])) { |
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if (strpos($result['extra'], 'filesort') || strpos($result['extra'], 'temporary')) { |
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$this->log('SQL:' . $this->queryStr . '[' . $result['extra'] . ']', 'warn'); |
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} |
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} |
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return $result; |
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} |
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protected function supportSavepoint(): bool |
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{ |
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return true; |
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} |
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} |
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