TP5兼容达梦国产数据库

1.首先数据库安装，部署时需配置大小写不敏感
2.安装PHP达梦扩展，一定要是对应版本（兼容操作系统）的扩展，否则会出现各种报错。参考官方文档：https://eco.dameng.com/document/dm/zh-cn/app-dev/php_php_new.html，注意拷贝扩展时根据安装的php版本，拷贝对应的线程安全或非安全版本扩展。
3.进入框架兼容改造部分，Config/database.php配置：
'type' => 'dm',
'quote' => '"', //库名（模式名）引用符号" 或 ` 等
4.添加对应驱动文件：thinkphp/library/think/db/connector/Dm.php 和 thinkphp/library/think/db/builder/Dm.php，具体代码看项目

thinkphp/library/think/db/connector/Dm.php：

<?php
// +----------------------------------------------------------------------
// | Modified for Dameng Database
// +----------------------------------------------------------------------namespace think\db\connector;use PDO;
use think\Container;
use think\db\Connection;
use think\db\Query;/*** 达梦数据库驱动*/
class Dm extends Connection
{protected $builder = '\\think\\db\\builder\\Dm'; // 使用达梦的 SQL 构造器/*** 初始化* @access protected* @return void*/protected function initialize(){// 可以在这里扩展达梦数据库特有的功能}/*** 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 = 'dm:host=' . $config['hostname'] . ';port=' . $config['hostport'] . ';schema="' . $config['database'] . '"';if (!empty($config['charset'])) {$dsn .= ';charset=' . $config['charset'];}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(' ', $tableName);if (strpos($tableName, '.')) {list($schema, $tableName) = explode('.', $tableName);}// 达梦数据库获取表结构$sql    = "SELECT COLUMN_NAME, DATA_TYPE,DATA_DEFAULT, DATA_LENGTH, NULLABLEFROM DBA_TAB_COLUMNSWHERE TABLE_NAME = '{$tableName}'";$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['column_name']] = ['name'    => $val['column_name'],'type'    => $val['data_type'],'notnull' => 'N' == $val['nullable'],'default' => $val['data_default'],'primary' => $val['column_name'] == 'id', //表主键基本都是id，为方便获取信息省略查询'autoinc' => $val['column_name'] == 'id', //表自增字段基本都是id，为方便获取信息省略查询];}}/** 查询主键及自增示例* -- 获取主键字段SELECTc.COLUMN_NAME AS pkFROMDBA_CONSTRAINTS conJOINDBA_CONS_COLUMNS c ON con.CONSTRAINT_NAME = c.CONSTRAINT_NAMEWHEREcon.TABLE_NAME = 'ss_logs_select'AND con.OWNER = 'self-service'AND con.CONSTRAINT_TYPE = 'P';-- 检查字段是否为自增字段select b.table_name,a.name COL_NAME from  SYS.SYSCOLUMNS a,all_tables b,sys.sysobjects c where a.INFO2 & 0x01 = 0x01and a.id=c.id and c.name= b.table_name AND b.table_name='ss_logs'* */return $this->fieldCase($info);}/*** 取得数据库的表信息* @access public* @param  string $dbName* @return array*/public function getTables($dbName = ''){// 达梦数据库使用 SHOW TABLES 语句获取表信息$sql    = !empty($dbName) ? "SELECT TABLE_NAME FROM DBA_TABLES WHERE OWNER = '" . $dbName . "'" : 'SELECT TABLE_NAME FROM DBA_TABLES';$pdo    = $this->query($sql, [], false, true);$result = $pdo->fetchAll(PDO::FETCH_ASSOC);$info   = [];foreach ($result as $key => $val) {$info[$key] = current($val);}return $info;}/*** 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, $fetch = ''){if (is_array($tableName)) {$tableName = key($tableName) ?: current($tableName);}if (strpos($tableName, ',')) {// 多表不获取字段信息return false;} else {$tableName = $this->parseSqlTable($tableName);}// 修正子查询作为表名的问题if (strpos($tableName, ')')) {return [];}list($tableName) = explode(' ', $tableName);if (false === strpos($tableName, '.')) {$schema = $this->getConfig('database') . '.' . $tableName;} else {$schema = $tableName;}if (!isset(self::$info[$schema])) {// 读取缓存$cacheFile = Container::get('app')->getRuntimePath() . 'schema' . DIRECTORY_SEPARATOR . $schema . '.php';if (!$this->config['debug'] && is_file($cacheFile)) {$info = include $cacheFile;} else {$info = $this->getFields($tableName);}$fields = array_keys($info);$bind   = $type   = [];foreach ($info as $key => $val) {// 记录字段类型$type[$key] = $val['type'];$bind[$key] = $this->getFieldBindType($val['type']);if (!empty($val['primary'])) {$pk[] = $key;}}if (isset($pk)) {// 设置主键$pk = count($pk) > 1 ? $pk : $pk[0];} else {$pk = null;}self::$info[$schema] = ['fields' => $fields, 'type' => $type, 'bind' => $bind, 'pk' => $pk];}//针对性处理字段名是desc这个关键词的情况if($fetch == "bind" && isset(self::$info[$schema][$fetch]['desc'])){self::$info[$schema][$fetch]['"desc"'] = self::$info[$schema][$fetch]['desc'];unset(self::$info[$schema][$fetch]['desc']);}return $fetch ? self::$info[$schema][$fetch] : self::$info[$schema];}/*** 查找单条记录* @access public* @param  Query  $query        查询对象* @return array|null|\PDOStatement|string* @throws DbException* @throws ModelNotFoundException* @throws DataNotFoundException*/public function find(Query $query){// 分析查询表达式$options = $query->getOptions();$pk      = $query->getPk($options);$data = $options['data'];$query->setOption('limit', 1);if (empty($options['fetch_sql']) && !empty($options['cache'])) {// 判断查询缓存$cache = $options['cache'];if (is_string($cache['key'])) {$key = $cache['key'];} else {$key = $this->getCacheKey($query, $data);}$result = Container::get('cache')->get($key);if (false !== $result) {return $result;}}if (is_string($pk) && !is_array($data)) {if (isset($key) && strpos($key, '|')) {list($a, $val) = explode('|', $key);$item[$pk]     = $val;} else {$item[$pk] = $data;}$data = $item;}$query->setOption('data', $data);// 生成查询SQL$sql = $this->builder->select($query);$query->removeOption('limit');$bind = $query->getBind();if (!empty($options['fetch_sql'])) {// 获取实际执行的SQL语句return $this->getRealSql($sql, $bind);}// 事件回调$result = $query->trigger('before_find');if (!$result) {// 执行查询$resultSet = $this->query($sql, $bind, $options['master'], $options['fetch_pdo']);if ($resultSet instanceof \PDOStatement) {// 返回PDOStatement对象return $resultSet;}$result = isset($resultSet[0]) ? $resultSet[0] : null;}if (isset($cache) && $result) {// 缓存数据$this->cacheData($key, $result, $cache);}return $result;}/*** SQL性能分析* @access protected* @param  string $sql* @return array*/protected function getExplain($sql){// 达梦数据库可能不支持 EXPLAIN，需要根据实际情况调整return [];}protected function supportSavepoint(){return true;}/*** 启动 XA 事务* @access public* @param  string $xid XA 事务 ID* @return void*/public function startTransXa($xid){$this->initConnect(true);if (!$this->linkID) {return false;}// 达梦数据库使用 DBMS_XA 包启动 XA 事务$this->linkID->exec("CALL DBMS_XA.START('{$xid}')");}/*** 预编译 XA 事务* @access public* @param  string $xid XA 事务 ID* @return void*/public function prepareXa($xid){$this->initConnect(true);// 达梦数据库使用 DBMS_XA 包结束并准备 XA 事务$this->linkID->exec("CALL DBMS_XA.END('{$xid}')");$this->linkID->exec("CALL DBMS_XA.PREPARE('{$xid}')");}/*** 提交 XA 事务* @access public* @param  string $xid XA 事务 ID* @return void*/public function commitXa($xid){$this->initConnect(true);// 达梦数据库使用 DBMS_XA 包提交 XA 事务$this->linkID->exec("CALL DBMS_XA.COMMIT('{$xid}')");}/*** 回滚 XA 事务* @access public* @param  string $xid XA 事务 ID* @return void*/public function rollbackXa($xid){$this->initConnect(true);// 达梦数据库使用 DBMS_XA 包回滚 XA 事务$this->linkID->exec("CALL DBMS_XA.ROLLBACK('{$xid}')");}
}

thinkphp/library/think/db/builder/Dm.php：

<?php
// +----------------------------------------------------------------------
// | Adapted for Dameng Database
// +----------------------------------------------------------------------namespace think\db\builder;use think\db\Builder;
use think\db\Expression;
use think\db\Query;
use think\Exception;/*** 达梦数据库驱动*/
class Dm extends Builder
{// 查询表达式解析protected $parser = ['parseCompare'     => ['=', '<>', '>', '>=', '<', '<='],'parseLike'        => ['LIKE', 'NOT LIKE'],'parseBetween'     => ['NOT BETWEEN', 'BETWEEN'],'parseIn'          => ['NOT IN', 'IN'],'parseExp'         => ['EXP'],'parseRegexp'      => ['REGEXP', 'NOT REGEXP'],'parseNull'        => ['NOT NULL', 'NULL'],'parseBetweenTime' => ['BETWEEN TIME', 'NOT BETWEEN TIME'],'parseTime'        => ['< TIME', '> TIME', '<= TIME', '>= TIME'],'parseExists'      => ['NOT EXISTS', 'EXISTS'],'parseColumn'      => ['COLUMN'],];protected $insertAllSql = '%INSERT% INTO %TABLE% (%FIELD%) VALUES %DATA% %COMMENT%';protected $updateSql    = 'UPDATE %TABLE% %JOIN% SET %SET% %WHERE% %ORDER%%LIMIT% %LOCK%%COMMENT%';/*** 生成insertall SQL* @access public* @param  Query     $query   查询对象* @param  array     $dataSet 数据集* @param  bool      $replace 是否replace* @return string*/public function insertAll(Query $query, $dataSet, $replace = false){$options = $query->getOptions();// 获取合法的字段if ('*' == $options['field']) {$allowFields = $this->connection->getTableFields($options['table']);} else {$allowFields = $options['field'];}// 获取绑定信息$bind = $this->connection->getFieldsBind($options['table']);foreach ($dataSet as $k => $data) {$data = $this->parseData($query, $data, $allowFields, $bind);$values[] = '( ' . implode(',', array_values($data)) . ' )';if (!isset($insertFields)) {$insertFields = array_keys($data);}}$fields = [];foreach ($insertFields as $field) {$fields[] = $this->parseKey($query, $field);}return str_replace(['%INSERT%', '%TABLE%', '%FIELD%', '%DATA%', '%COMMENT%'],[$replace ? 'REPLACE' : 'INSERT',$this->parseTable($query, $options['table']),implode(' , ', $fields),implode(' , ', $values),$this->parseComment($query, $options['comment']),],$this->insertAllSql);}/*** 正则查询* @access protected* @param  Query        $query        查询对象* @param  string       $key* @param  string       $exp* @param  mixed        $value* @param  string       $field* @return string*/protected function parseRegexp(Query $query, $key, $exp, $value, $field){if ($value instanceof Expression) {$value = $value->getValue();}// REGEXP约等于达梦数据库parseRegexp()，若行不通也可以使用 LIKE 或其他方式替代return "parseRegexp({$key}, {$value})";}/*** 字段和表名处理* @access public* @param  Query     $query 查询对象* @param  mixed     $key   字段名* @param  bool      $strict   严格检测* @return string*/public function parseKey(Query $query, $key, $strict = false){if (is_numeric($key)) {return $key;} elseif ($key instanceof Expression) {return $key->getValue();}$key = trim($key);// 达梦数据库不支持 JSON 字段的 `->>` 或 `->` 语法if (strpos($key, '->') || strpos($key, '->>')) {throw new Exception('JSON field syntax is not supported in Dameng Database.');}if (strpos($key, '.') && !preg_match('/[,\'\"\(\)`\s]/', $key)) {list($table, $key) = explode('.', $key, 2);$alias = $query->getOptions('alias');if ('__TABLE__' == $table) {$table = $query->getOptions('table');$table = is_array($table) ? array_shift($table) : $table;}if (isset($alias[$table])) {$table = $alias[$table];}}/*if ($strict && !preg_match('/^[\w\.\*]+$/', $key)) { //desc这种关键词形式需加""的字段会导致匹配失败throw new Exception('not support data:' . $key);}*//*if ('*' != $key && !preg_match('/[,\'\"\*\(\)`.\s]/', $key)) {$key = '"' . $key . '"'; // 达梦数据库使用双引号}*/if (isset($table)) {$key = $table . '.' . $key;}return $key;}/*** 生成查询SQL* @access public* @param  Query  $query  查询对象* @return string*/public function select(Query $query){$options = $query->getOptions();return str_replace(['%TABLE%', '%DISTINCT%', '%FIELD%', '%JOIN%', '%WHERE%', '%GROUP%', '%HAVING%', '%ORDER%', '%LIMIT%', '%UNION%', '%LOCK%', '%COMMENT%', '%FORCE%'],[$this->parseTable($query, $options['table']),$this->parseDistinct($query, $options['distinct']),$this->parseField($query, $options['field']),$this->parseJoin($query, $options['join']),$this->parseWhere($query, $options['where']),$this->parseGroup($query, $options['group']),$this->parseHaving($query, $options['having']),$this->parseOrder($query, $options['order']),$this->parseLimit($query, $options['limit']),$this->parseUnion($query, $options['union']),$this->parseLock($query, $options['lock']),$this->parseComment($query, $options['comment']),$this->parseForce($query, $options['force']),],$this->selectSql);}/*** table分析* @access protected* @param  Query     $query         查询对象* @param  mixed     $tables        表名* @return string*/protected function parseTable(Query $query, $tables){$item    = [];$options = $query->getOptions();foreach ((array) $tables as $key => $table) {if (!is_numeric($key)) {$key    = $this->connection->parseSqlTable($key);$item[] = $this->parseKey($query, $key) . ' ' . $this->parseKey($query, $table);} else {$table = $this->connection->parseSqlTable($table);if (isset($options['alias'][$table])) {$item[] = $this->parseKey($query, $table) . ' ' . $this->parseKey($query, $options['alias'][$table]);} else {$item[] = $this->parseKey($query, $table);}}}return implode(',', $item);}/*** 随机排序* @access protected* @param  Query     $query        查询对象* @return string*/protected function parseRand(Query $query){// 达梦数据库不支持 MySQL 的 rand() 函数，可以使用其他方式替代return 'DBMS_RANDOM.VALUE';}
}

5.Application/common.php添加方法：

//判断是否使用的达梦数据库
function isDMBase()
{return config('database.type') == 'dm';
}

6.相关group 分组sql语句与南大通用类似，group by的字段必须和查询字段相对应，不能出现字段分组模棱两可的情况。

7.Sql条件中存在逻辑或使用||的，更换成OR。

8.sql语句中使用了date_format()的地方全部更换成公共方法getSqlDateFormat()

格式符参考”DM8 SQL.pdf”文件里格式符：


/*** 根据提供的参数返回计算日期时间的sql语句* 为兼容达梦等数据库语法差异* 支持达梦group by* @param $intval 日期时间偏差,必须严格按照格式传输例如： -1 day* @param $time 日期时间* @param $format 日期时间格式* @return string*/
function getSqlDateFormat($intval, $format = '', $time = '')
{if($time == ''){$time = 'NOW()';}elseif(substr($time, 0, 5) == 'left('){ //兼容sql语句left(date_field_name, len),如left(create_time,10)$time = $time;}else{$time = "'{$time}'"; //具体日期字符串}$format = $format ?: '%Y-%m-%d';if(isDMBase()){//达梦语法$time = $time == 'NOW()' ? 'SYSDATE' : $time;$intvalArr = explode(' ', $intval);if(count($intvalArr) != 2){ //必须严格按照格式传输例如： -1 dayreturn '';}$offset = $intvalArr[0]; //偏移量$unit = strtolower($intvalArr[1]); //取最后一个单位（day,hour,month等）$unitFormat = '';switch ($unit){case 'day':$unitFormat = 'DD';break;case 'month':$unitFormat = 'MM';break;case 'hour':$unitFormat = 'HH';break;case 'week':$unitFormat = 'WW';break;case 'year':$unitFormat = 'YYYY';break;}$format = str_replace(['%Y', '%m', '%d', '%H', '%u', '%i', '%s'], ['YYYY', 'MM', 'DD', 'HH24', 'WW', 'MI', 'SS'], $format);$sql = "TO_CHAR(DATEADD({$unitFormat}, {$offset}, {$time}), '{$format}')";}elseif(isKBASEDataBase()){//人大金仓语法if(substr($time, 0, 5) == 'left('){$leftParams = explode(',', substr($time, 5, -1));$time = 'to_timestamp(substring(' . $leftParams[0] . ' FROM 1 FOR ' . $leftParams[1] . '))';}else{$time = $time == 'NOW()' ? 'CURRENT_DATE' : 'TIMESTAMP ' . $time;}$intvalArr = explode(' ', $intval);if(count($intvalArr) != 2){ //必须严格按照格式传输例如： -1 dayreturn '';}$offset = intval($intvalArr[0]); //偏移量$sign = $offset < 0 ? '-' : '+'; //符号位$offset = abs($offset);$unit = strtolower($intvalArr[1]); //取最后一个单位（day,hour,month等）$intvalstr = $offset == 0 ? '' : " {$sign} INTERVAL '{$offset} {$unit}'";$format = str_replace(['%Y', '%m', '%d', '%H', '%u', '%i', '%s'], ['YYYY', 'MM', 'DD', 'HH24', 'IW', 'MI', 'SS'], $format);$sql = "TO_CHAR({$time}{$intvalstr},'{$format}')";}else{$sql = "DATE_FORMAT(DATE_ADD({$time}, INTERVAL {$intval}), '{$format}')";}return $sql;
}/*** 根据提供的参数返回计算日期时间的sql语句* 为兼容达梦等数据库语法差异* 注：达梦不支持group by DATE_FORMAT()* @param $intval 日期时间偏差,必须严格按照格式传输例如： -1 day* @param $time 日期时间* @param $format 日期时间格式* @return string*/
/*function getSqlDateFormat($intval, $format = '', $time = '')
{if($time == ''){$time = 'NOW()';}elseif(substr($time, 0, 5) == 'left('){ //兼容sql语句left(date_field_name, len),如left(create_time,10)$time = $time;}else{$time = "'{$time}'"; //具体日期字符串}$format = $format ?: '%Y-%m-%d';if(isDMBase()){//达梦语法$intvalArr = explode(' ', $intval);if(count($intvalArr) != 2){ //必须严格按照格式传输例如： -1 dayreturn '';}$offset = $intvalArr[0]; //偏移量$unit = strtolower($intvalArr[1]); //取最后一个单位（day,hour,month等）if($unit == 'week'){$offset = intval($offset) * 7;$unit = 'day';}$sql = "DATE_FORMAT(DATE_ADD({$time}, INTERVAL '{$offset}' {$unit}), '{$format}')";}else{$sql = "DATE_FORMAT(DATE_ADD({$time}, INTERVAL {$intval}), '{$format}')";}return $sql;
}*/