/
PDOConnection.php
1846 lines (1586 loc) · 50.7 KB
/
PDOConnection.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2019 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);
namespace think\db;
use Closure;
use PDO;
use PDOStatement;
use think\db\exception\BindParamException;
use think\db\exception\DbEventException;
use think\db\exception\DbException;
use think\db\exception\PDOException;
use think\Model;
/**
* 数据库连接基础类
* @property PDO[] $links
* @property PDO $linkID
* @property PDO $linkRead
* @property PDO $linkWrite
*/
abstract class PDOConnection extends Connection
{
const PARAM_FLOAT = 21;
/**
* 数据库连接参数配置
* @var array
*/
protected $config = [
// 数据库类型
'type' => '',
// 服务器地址
'hostname' => '',
// 数据库名
'database' => '',
// 用户名
'username' => '',
// 密码
'password' => '',
// 端口
'hostport' => '',
// 连接dsn
'dsn' => '',
// 数据库连接参数
'params' => [],
// 数据库编码默认采用utf8
'charset' => 'utf8',
// 数据库表前缀
'prefix' => '',
// 数据库部署方式:0 集中式(单一服务器),1 分布式(主从服务器)
'deploy' => 0,
// 数据库读写是否分离 主从式有效
'rw_separate' => false,
// 读写分离后 主服务器数量
'master_num' => 1,
// 指定从服务器序号
'slave_no' => '',
// 模型写入后自动读取主服务器
'read_master' => false,
// 是否严格检查字段是否存在
'fields_strict' => true,
// 开启字段缓存
'fields_cache' => false,
// 监听SQL
'trigger_sql' => true,
// Builder类
'builder' => '',
// Query类
'query' => '',
// 是否需要断线重连
'break_reconnect' => false,
// 断线标识字符串
'break_match_str' => [],
];
/**
* PDO操作实例
* @var PDOStatement
*/
protected $PDOStatement;
/**
* 当前SQL指令
* @var string
*/
protected $queryStr = '';
/**
* 事务指令数
* @var int
*/
protected $transTimes = 0;
/**
* 重连次数
* @var int
*/
protected $reConnectTimes = 0;
/**
* 查询结果类型
* @var int
*/
protected $fetchType = PDO::FETCH_ASSOC;
/**
* 字段属性大小写
* @var int
*/
protected $attrCase = PDO::CASE_LOWER;
/**
* 数据表信息
* @var array
*/
protected $info = [];
/**
* 查询开始时间
* @var float
*/
protected $queryStartTime;
/**
* PDO连接参数
* @var array
*/
protected $params = [
PDO::ATTR_CASE => PDO::CASE_NATURAL,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_ORACLE_NULLS => PDO::NULL_NATURAL,
PDO::ATTR_STRINGIFY_FETCHES => false,
PDO::ATTR_EMULATE_PREPARES => false,
];
/**
* 参数绑定类型映射
* @var array
*/
protected $bindType = [
'string' => PDO::PARAM_STR,
'str' => PDO::PARAM_STR,
'integer' => PDO::PARAM_INT,
'int' => PDO::PARAM_INT,
'boolean' => PDO::PARAM_BOOL,
'bool' => PDO::PARAM_BOOL,
'float' => self::PARAM_FLOAT,
'datetime' => PDO::PARAM_STR,
'timestamp' => PDO::PARAM_STR,
];
/**
* 服务器断线标识字符
* @var array
*/
protected $breakMatchStr = [
'server has gone away',
'no connection to the server',
'Lost connection',
'is dead or not enabled',
'Error while sending',
'decryption failed or bad record mac',
'server closed the connection unexpectedly',
'SSL connection has been closed unexpectedly',
'Error writing data to the connection',
'Resource deadlock avoided',
'failed with errno',
'child connection forced to terminate due to client_idle_limit',
'query_wait_timeout',
'reset by peer',
'Physical connection is not usable',
'TCP Provider: Error code 0x68',
'ORA-03114',
'Packets out of order. Expected',
'Adaptive Server connection failed',
'Communication link failure',
'connection is no longer usable',
'Login timeout expired',
'SQLSTATE[HY000] [2002] Connection refused',
'running with the --read-only option so it cannot execute this statement',
'The connection is broken and recovery is not possible. The connection is marked by the client driver as unrecoverable. No attempt was made to restore the connection.',
'SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Try again',
'SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known',
'SQLSTATE[HY000]: General error: 7 SSL SYSCALL error: EOF detected',
'SQLSTATE[HY000] [2002] Connection timed out',
'SSL: Connection timed out',
'SQLSTATE[HY000]: General error: 1105 The last transaction was aborted due to Seamless Scaling. Please retry.',
];
/**
* 绑定参数
* @var array
*/
protected $bind = [];
/**
* 获取当前连接器类对应的Query类
* @access public
* @return string
*/
public function getQueryClass(): string
{
return $this->getConfig('query') ?: Query::class;
}
/**
* 获取当前连接器类对应的Builder类
* @access public
* @return string
*/
public function getBuilderClass(): string
{
return $this->getConfig('builder') ?: '\\think\\db\\builder\\' . ucfirst($this->getConfig('type'));
}
/**
* 解析pdo连接的dsn信息
* @access protected
* @param array $config 连接信息
* @return string
*/
abstract protected function parseDsn(array $config): string;
/**
* 取得数据表的字段信息
* @access public
* @param string $tableName 数据表名称
* @return array
*/
abstract public function getFields(string $tableName): array;
/**
* 取得数据库的表信息
* @access public
* @param string $dbName 数据库名称
* @return array
*/
abstract public function getTables(string $dbName = ''): array;
/**
* 对返数据表字段信息进行大小写转换出来
* @access public
* @param array $info 字段信息
* @return array
*/
public function fieldCase(array $info): array
{
// 字段大小写转换
switch ($this->attrCase) {
case PDO::CASE_LOWER:
$info = array_change_key_case($info);
break;
case PDO::CASE_UPPER:
$info = array_change_key_case($info, CASE_UPPER);
break;
case PDO::CASE_NATURAL:
default:
// 不做转换
}
return $info;
}
/**
* 获取字段类型
* @access protected
* @param string $type 字段类型
* @return string
*/
protected function getFieldType(string $type): string
{
if (0 === stripos($type, 'set') || 0 === stripos($type, 'enum')) {
$result = 'string';
} elseif (preg_match('/(double|float|decimal|real|numeric)/is', $type)) {
$result = 'float';
} elseif (preg_match('/(int|serial|bit)/is', $type)) {
$result = 'int';
} elseif (preg_match('/bool/is', $type)) {
$result = 'bool';
} elseif (0 === stripos($type, 'timestamp')) {
$result = 'timestamp';
} elseif (0 === stripos($type, 'datetime')) {
$result = 'datetime';
} elseif (0 === stripos($type, 'date')) {
$result = 'date';
} else {
$result = 'string';
}
return $result;
}
/**
* 获取字段绑定类型
* @access public
* @param string $type 字段类型
* @return integer
*/
public function getFieldBindType(string $type): int
{
if (in_array($type, ['integer', 'string', 'float', 'boolean', 'bool', 'int', 'str'])) {
$bind = $this->bindType[$type];
} elseif (0 === strpos($type, 'set') || 0 === strpos($type, 'enum')) {
$bind = PDO::PARAM_STR;
} elseif (preg_match('/(double|float|decimal|real|numeric)/is', $type)) {
$bind = self::PARAM_FLOAT;
} elseif (preg_match('/(int|serial|bit)/is', $type)) {
$bind = PDO::PARAM_INT;
} elseif (preg_match('/bool/is', $type)) {
$bind = PDO::PARAM_BOOL;
} else {
$bind = PDO::PARAM_STR;
}
return $bind;
}
/**
* 获取数据表信息缓存key
* @access protected
* @param string $schema 数据表名称
* @return string
*/
protected function getSchemaCacheKey(string $schema): string
{
return $this->getConfig('hostname') . ':' . $this->getConfig('hostport') . '@' . $schema;
}
/**
* @param string $tableName 数据表名称
* @param bool $force 强制从数据库获取
* @return array
*/
public function getSchemaInfo(string $tableName, $force = false)
{
if (!strpos($tableName, '.')) {
$schema = $this->getConfig('database') . '.' . $tableName;
} else {
$schema = $tableName;
}
if (!isset($this->info[$schema]) || $force) {
// 读取字段缓存
$cacheKey = $this->getSchemaCacheKey($schema);
$cacheField = $this->config['fields_cache'] && !empty($this->cache);
if ($cacheField && !$force) {
$info = $this->cache->get($cacheKey);
}
if (empty($info)) {
$info = $this->getTableFieldsInfo($tableName);
if ($cacheField) {
$this->cache->set($cacheKey, $info);
}
}
$pk = $info['_pk'] ?? null;
$autoinc = $info['_autoinc'] ?? null;
unset($info['_pk'], $info['_autoinc']);
$bind = [];
foreach ($info as $name => $val) {
$bind[$name] = $this->getFieldBindType($val);
}
$this->info[$schema] = [
'fields' => array_keys($info),
'type' => $info,
'bind' => $bind,
'pk' => $pk,
'autoinc' => $autoinc,
];
}
return $this->info[$schema];
}
/**
* 获取数据表信息
* @access public
* @param mixed $tableName 数据表名 留空自动获取
* @param string $fetch 获取信息类型 包括 fields type bind pk
* @return mixed
*/
public function getTableInfo($tableName, string $fetch = '')
{
if (is_array($tableName)) {
$tableName = key($tableName) ?: current($tableName);
}
if (strpos($tableName, ',') || strpos($tableName, ')')) {
// 多表不获取字段信息
return [];
}
[$tableName] = explode(' ', $tableName);
$info = $this->getSchemaInfo($tableName);
return $fetch ? $info[$fetch] : $info;
}
/**
* 获取数据表的字段信息
* @access public
* @param string $tableName 数据表名
* @return array
*/
public function getTableFieldsInfo(string $tableName): array
{
$fields = $this->getFields($tableName);
$info = [];
foreach ($fields as $key => $val) {
// 记录字段类型
$info[$key] = $this->getFieldType($val['type']);
if (!empty($val['primary'])) {
$pk[] = $key;
}
if (!empty($val['autoinc'])) {
$autoinc = $key;
}
}
if (isset($pk)) {
// 设置主键
$pk = count($pk) > 1 ? $pk : $pk[0];
$info['_pk'] = $pk;
}
if (isset($autoinc)) {
$info['_autoinc'] = $autoinc;
}
return $info;
}
/**
* 获取数据表的主键
* @access public
* @param mixed $tableName 数据表名
* @return string|array
*/
public function getPk($tableName)
{
return $this->getTableInfo($tableName, 'pk');
}
/**
* 获取数据表的自增主键
* @access public
* @param mixed $tableName 数据表名
* @return string
*/
public function getAutoInc($tableName)
{
return $this->getTableInfo($tableName, 'autoinc');
}
/**
* 获取数据表字段信息
* @access public
* @param mixed $tableName 数据表名
* @return array
*/
public function getTableFields($tableName): array
{
return $this->getTableInfo($tableName, 'fields');
}
/**
* 获取数据表字段类型
* @access public
* @param mixed $tableName 数据表名
* @param string $field 字段名
* @return array|string
*/
public function getFieldsType($tableName, string $field = null)
{
$result = $this->getTableInfo($tableName, 'type');
if ($field && isset($result[$field])) {
return $result[$field];
}
return $result;
}
/**
* 获取数据表绑定信息
* @access public
* @param mixed $tableName 数据表名
* @return array
*/
public function getFieldsBind($tableName): array
{
return $this->getTableInfo($tableName, 'bind');
}
/**
* 连接数据库方法
* @access public
* @param array $config 连接参数
* @param integer $linkNum 连接序号
* @param array|bool $autoConnection 是否自动连接主数据库(用于分布式)
* @return PDO
* @throws PDOException
*/
public function connect(array $config = [], $linkNum = 0, $autoConnection = false): PDO
{
if (isset($this->links[$linkNum])) {
return $this->links[$linkNum];
}
if (empty($config)) {
$config = $this->config;
} else {
$config = array_merge($this->config, $config);
}
// 连接参数
if (isset($config['params']) && is_array($config['params'])) {
$params = $config['params'] + $this->params;
} else {
$params = $this->params;
}
// 记录当前字段属性大小写设置
$this->attrCase = $params[PDO::ATTR_CASE];
if (!empty($config['break_match_str'])) {
$this->breakMatchStr = array_merge($this->breakMatchStr, (array) $config['break_match_str']);
}
try {
if (empty($config['dsn'])) {
$config['dsn'] = $this->parseDsn($config);
}
$startTime = microtime(true);
$this->links[$linkNum] = $this->createPdo($config['dsn'], $config['username'], $config['password'], $params);
// SQL监控
if (!empty($config['trigger_sql'])) {
$this->trigger('CONNECT:[ UseTime:' . number_format(microtime(true) - $startTime, 6) . 's ] ' . $config['dsn']);
}
return $this->links[$linkNum];
} catch (\PDOException $e) {
if ($autoConnection) {
$this->db->log($e->getMessage(), 'error');
return $this->connect($autoConnection, $linkNum);
} else {
throw $e;
}
}
}
/**
* 视图查询
* @access public
* @param array $args
* @return BaseQuery
*/
public function view(...$args)
{
return $this->newQuery()->view(...$args);
}
/**
* 创建PDO实例
* @param $dsn
* @param $username
* @param $password
* @param $params
* @return PDO
*/
protected function createPdo($dsn, $username, $password, $params)
{
return new PDO($dsn, $username, $password, $params);
}
/**
* 释放查询结果
* @access public
*/
public function free(): void
{
$this->PDOStatement = null;
}
/**
* 获取PDO对象
* @access public
* @return PDO|false
*/
public function getPdo()
{
if (!$this->linkID) {
return false;
}
return $this->linkID;
}
/**
* 执行查询 使用生成器返回数据
* @access public
* @param BaseQuery $query 查询对象
* @param string $sql sql指令
* @param array $bind 参数绑定
* @param Model|null $model 模型对象实例
* @param null $condition 查询条件
* @return \Generator
* @throws DbException
*/
public function getCursor(BaseQuery $query, string $sql, array $bind = [], $model = null, $condition = null)
{
$this->queryPDOStatement($query, $sql, $bind);
// 返回结果集
while ($result = $this->PDOStatement->fetch($this->fetchType)) {
if ($model) {
yield $model->newInstance($result, $condition);
} else {
yield $result;
}
}
}
/**
* 执行查询 返回数据集
* @access public
* @param string $sql sql指令
* @param array $bind 参数绑定
* @param bool $master 主库读取
* @return array
* @throws DbException
*/
public function query(string $sql, array $bind = [], bool $master = false): array
{
return $this->pdoQuery($this->newQuery(), $sql, $bind, $master);
}
/**
* 执行语句
* @access public
* @param string $sql sql指令
* @param array $bind 参数绑定
* @return int
* @throws DbException
*/
public function execute(string $sql, array $bind = []): int
{
return $this->pdoExecute($this->newQuery(), $sql, $bind, true);
}
/**
* 执行查询 返回数据集
* @access protected
* @param BaseQuery $query 查询对象
* @param mixed $sql sql指令
* @param array $bind 参数绑定
* @param bool $master 主库读取
* @return array
* @throws DbException
*/
protected function pdoQuery(BaseQuery $query, $sql, array $bind = [], bool $master = null): array
{
// 分析查询表达式
$query->parseOptions();
if ($query->getOptions('cache')) {
// 检查查询缓存
$cacheItem = $this->parseCache($query, $query->getOptions('cache'));
$key = $cacheItem->getKey();
$data = $this->cache->get($key);
if (null !== $data) {
return $data;
}
}
if ($sql instanceof Closure) {
$sql = $sql($query);
$bind = $query->getBind();
}
if (!isset($master)) {
$master = $query->getOptions('master') ? true : false;
}
$procedure = $query->getOptions('procedure') ? true : in_array(strtolower(substr(trim($sql), 0, 4)), ['call', 'exec']);
$this->getPDOStatement($sql, $bind, $master, $procedure);
$resultSet = $this->getResult($procedure);
if (isset($cacheItem) && $resultSet) {
// 缓存数据集
$cacheItem->set($resultSet);
$this->cacheData($cacheItem);
}
return $resultSet;
}
/**
* 执行查询但只返回PDOStatement对象
* @access public
* @param BaseQuery $query 查询对象
* @return \PDOStatement
* @throws DbException
*/
public function pdo(BaseQuery $query): PDOStatement
{
$bind = $query->getBind();
// 生成查询SQL
$sql = $this->builder->select($query);
return $this->queryPDOStatement($query, $sql, $bind);
}
/**
* 执行查询但只返回PDOStatement对象
* @access public
* @param string $sql sql指令
* @param array $bind 参数绑定
* @param bool $master 是否在主服务器读操作
* @param bool $procedure 是否为存储过程调用
* @return PDOStatement
* @throws DbException
*/
public function getPDOStatement(string $sql, array $bind = [], bool $master = false, bool $procedure = false): PDOStatement
{
try {
$this->initConnect($this->readMaster ?: $master);
// 记录SQL语句
$this->queryStr = $sql;
$this->bind = $bind;
$this->db->updateQueryTimes();
$this->queryStartTime = microtime(true);
// 预处理
$this->PDOStatement = $this->linkID->prepare($sql);
// 参数绑定
if ($procedure) {
$this->bindParam($bind);
} else {
$this->bindValue($bind);
}
// 执行查询
$this->PDOStatement->execute();
// SQL监控
if (!empty($this->config['trigger_sql'])) {
$this->trigger('', $master);
}
$this->reConnectTimes = 0;
return $this->PDOStatement;
} catch (\Throwable | \Exception $e) {
if ($this->transTimes > 0) {
// 事务活动中时不应该进行重试,应直接中断执行,防止造成污染。
if ($this->isBreak($e)) {
// 尝试对事务计数进行重置
$this->transTimes = 0;
}
} else {
if ($this->reConnectTimes < 4 && $this->isBreak($e)) {
++$this->reConnectTimes;
return $this->close()->getPDOStatement($sql, $bind, $master, $procedure);
}
}
if ($e instanceof \PDOException) {
throw new PDOException($e, $this->config, $this->getLastsql());
} else {
throw $e;
}
}
}
/**
* 执行语句
* @access protected
* @param BaseQuery $query 查询对象
* @param string $sql sql指令
* @param array $bind 参数绑定
* @param bool $origin 是否原生查询
* @return int
* @throws DbException
*/
protected function pdoExecute(BaseQuery $query, string $sql, array $bind = [], bool $origin = false): int
{
if ($origin) {
$query->parseOptions();
}
$this->queryPDOStatement($query->master(true), $sql, $bind);
if (!$origin && !empty($this->config['deploy']) && !empty($this->config['read_master'])) {
$this->readMaster = true;
}
$this->numRows = $this->PDOStatement->rowCount();
if ($query->getOptions('cache')) {
// 清理缓存数据
$cacheItem = $this->parseCache($query, $query->getOptions('cache'));
$key = $cacheItem->getKey();
$tag = $cacheItem->getTag();
if (isset($key) && $this->cache->has($key)) {
$this->cache->delete($key);
} elseif (!empty($tag) && method_exists($this->cache, 'tag')) {
$this->cache->tag($tag)->clear();
}
}
return $this->numRows;
}
/**
* @param BaseQuery $query
* @param string $sql
* @param array $bind
* @return PDOStatement
* @throws DbException
*/
protected function queryPDOStatement(BaseQuery $query, string $sql, array $bind = []): PDOStatement
{
$options = $query->getOptions();
$master = !empty($options['master']) ? true : false;
$procedure = !empty($options['procedure']) ? true : in_array(strtolower(substr(trim($sql), 0, 4)), ['call', 'exec']);
return $this->getPDOStatement($sql, $bind, $master, $procedure);
}
/**
* 查找单条记录
* @access public
* @param BaseQuery $query 查询对象
* @return array
* @throws DbException
*/
public function find(BaseQuery $query): array
{
// 事件回调
try {
$this->db->trigger('before_find', $query);
} catch (DbEventException $e) {
return [];
}
// 执行查询
$resultSet = $this->pdoQuery($query, function ($query) {
return $this->builder->select($query, true);
});
return $resultSet[0] ?? [];
}
/**
* 使用游标查询记录
* @access public
* @param BaseQuery $query 查询对象
* @return \Generator
*/
public function cursor(BaseQuery $query)
{
// 分析查询表达式
$options = $query->parseOptions();
// 生成查询SQL
$sql = $this->builder->select($query);
$condition = $options['where']['AND'] ?? null;
// 执行查询操作
return $this->getCursor($query, $sql, $query->getBind(), $query->getModel(), $condition);
}
/**
* 查找记录
* @access public
* @param BaseQuery $query 查询对象
* @return array
* @throws DbException
*/
public function select(BaseQuery $query): array
{
try {
$this->db->trigger('before_select', $query);
} catch (DbEventException $e) {
return [];
}
// 执行查询操作
return $this->pdoQuery($query, function ($query) {
return $this->builder->select($query);
});
}
/**
* 插入记录
* @access public
* @param BaseQuery $query 查询对象
* @param boolean $getLastInsID 返回自增主键
* @return mixed
*/
public function insert(BaseQuery $query, bool $getLastInsID = false)
{
// 分析查询表达式
$options = $query->parseOptions();
// 生成SQL语句
$sql = $this->builder->insert($query);
// 执行操作
$result = '' == $sql ? 0 : $this->pdoExecute($query, $sql, $query->getBind());
if ($result) {
$sequence = $options['sequence'] ?? null;
$lastInsId = $this->getLastInsID($query, $sequence);
$data = $options['data'];
if ($lastInsId) {
$pk = $query->getAutoInc();
if ($pk) {
$data[$pk] = $lastInsId;
}
}
$query->setOption('data', $data);
$this->db->trigger('after_insert', $query);
if ($getLastInsID && $lastInsId) {
return $lastInsId;
}
}
return $result;
}
/**
* 批量插入记录
* @access public
* @param BaseQuery $query 查询对象
* @param mixed $dataSet 数据集
* @param integer $limit 每次写入数据限制
* @return integer
* @throws \Exception
* @throws \Throwable
*/
public function insertAll(BaseQuery $query, array $dataSet = [], int $limit = 0): int
{
if (!is_array(reset($dataSet))) {
return 0;
}
$options = $query->parseOptions();
$replace = !empty($options['replace']);
if (0 === $limit && count($dataSet) >= 5000) {
$limit = 1000;
}
if ($limit) {
// 分批写入 自动启动事务支持
$this->startTrans();
try {
$array = array_chunk($dataSet, $limit, true);
$count = 0;
foreach ($array as $item) {
$sql = $this->builder->insertAll($query, $item, $replace);
$count += $this->pdoExecute($query, $sql, $query->getBind());