714 lines
22 KiB
PHP
714 lines
22 KiB
PHP
<?php
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/**
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* ZenTaoPHP的dbh类。
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* The dbh class file of ZenTaoPHP framework.
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*
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* The author disclaims copyright to this source code. In place of
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* a legal notice, here is a blessing:
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*
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* May you do good and not evil.
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* May you find forgiveness for yourself and forgive others.
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* May you share freely, never taking more than you give.
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*/
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/**
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* DBH类。
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* DBH, database handler.
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*
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* @package lib
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*/
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class dbh
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{
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/**
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* Flag for database.
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*
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* @var string MASTER|SLAVE|BI
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* @access private
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*/
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private $flag;
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/**
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* PDO.
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*
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* @var object
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* @access private
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*/
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private $pdo;
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/**
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* Database config.
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*
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* @var object
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* @access private
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*/
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private $config;
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/**
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* Constructor
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*
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* @param object $config
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* @param bool $setSchema
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* @param string $flag
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* @access public
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* @return void
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*/
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public function __construct($config, $setSchema = true, $flag = 'MASTER')
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{
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$dsn = "{$config->driver}:host={$config->host};port={$config->port}";
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if($setSchema) $dsn .= ";dbname={$config->name}";
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$pdo = new PDO($dsn, $config->user, $config->password);
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$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);
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$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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if($config->driver == 'mysql')
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{
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$pdo->exec("SET NAMES {$config->encoding}");
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if(isset($this->config->strictMode) and $this->config->strictMode == false) $pdo->exec("SET @@sql_mode= ''");
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}
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else if($setSchema)
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{
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$pdo->exec("SET SCHEMA {$config->name}");
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}
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$this->pdo = $pdo;
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$this->config = $config;
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$this->flag = $flag;
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}
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/**
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* Execute sql.
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*
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* @param string $sql
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* @access public
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* @return PDOStatement|false
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*/
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public function exec($sql)
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{
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$sql = $this->formatSQL($sql);
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if(!$sql) return true;
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if(class_exists('dao')) dao::$querys[] = "[$this->flag] " . dao::processKeywords($sql);
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return $this->pdo->exec($sql);
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}
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/**
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* Query sql.
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*
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* @param string $sql
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* @access public
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* @return PDOStatement|false
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*/
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public function query($sql)
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{
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$sql = $this->formatSQL($sql);
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if(class_exists('dao')) dao::$querys[] = "[$this->flag] " . dao::processKeywords($sql);
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$result = $this->pdo->query($sql);
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return $result;
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}
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/**
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* Query raw sql.
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*
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* @param string $sql
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* @access public
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* @return PDOStatement|false
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*/
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public function rawQuery($sql)
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{
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if(class_exists('dao')) dao::$querys[] = "[$this->flag] " . dao::processKeywords($sql);
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$result = $this->pdo->query($sql);
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return $result;
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}
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/**
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* Set attribute.
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*
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* @param int $attribute
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* @param mixed $value
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* @access public
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* @return bool
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*/
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public function setAttribute($attribute, $value)
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{
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return $this->pdo->setAttribute($attribute, $value);
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}
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/**
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* Check db exits or not.
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*
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* @access public
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* @return bool
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*/
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public function dbExists()
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{
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switch($this->config->driver)
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{
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case 'mysql':
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$sql = "SHOW DATABASES like '{$this->config->name}'";
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break;
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case 'dm':
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$sql = "SELECT * FROM ALL_OBJECTS WHERE object_type='SCH' AND owner='{$this->config->name}'";
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break;
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default:
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$sql = '';
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}
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return $this->rawQuery($sql)->fetch();
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}
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/**
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* Check table exits or not.
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*
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* @param string $tableName
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* @access public
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* @return void
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*/
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public function tableExits($tableName)
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{
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$tableName = str_replace('`', "'", $tableName);
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$tableName = str_replace("'", "", $tableName);
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$sql = "SHOW TABLES FROM {$this->config->name} like '{$tableName}'";
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switch($this->config->driver)
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{
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case 'mysql':
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$sql = "SHOW TABLES FROM {$this->config->name} like '{$tableName}'";
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break;
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case 'dm':
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$sql = "SELECT * FROM all_tables WHERE owner='{$this->config->name}' AND table_name='{$tableName}'";
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break;
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default:
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$sql = '';
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}
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return $this->rawQuery($sql)->fetch();
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}
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/**
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* Create database.
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*
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* @param string $version
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* @access public
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* @return PDOStatement|false
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*/
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public function createDB($version)
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{
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switch($this->config->driver)
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{
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case 'mysql':
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$sql = "CREATE DATABASE `{$this->config->name}`";
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if($version > 4.1) $sql .= " DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci";
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return $this->rawQuery($sql);
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case 'dm':
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/*
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$tableSpace = strtoupper($this->config->name);
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$res = $this->rawQuery("SELECT * FROM dba_data_files WHERE TABLESPACE_NAME = '$tableSpace'")->fetchAll();
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if(empty($res))
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{
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$createTableSpace = "CREATE TABLESPACE $tableSpace DATAFILE '{$this->config->name}.DBF' size 150 AUTOEXTEND ON";
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$createUser = "CREATE USER {$this->config->name} IDENTIFIED by {$this->config->password} DEFAULT TABLESPACE {$this->config->name} DEFAULT INDEX TABLESPACE {$this->config->name}";
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$this->rawQuery($createTableSpace);
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$this->rawQuery($createUser);
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}
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*/
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$createSchema = "CREATE SCHEMA {$this->config->name} AUTHORIZATION {$this->config->user}";
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return $this->rawQuery($createSchema);
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default:
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return false;
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}
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}
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/**
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* Use database or schema.
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*
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* @param string $dbName
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* @access public
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* @return PDOStatement|false
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*/
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public function useDB($dbName)
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{
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switch($this->config->driver)
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{
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case 'mysql':
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return $this->exec("USE {$this->config->name}");
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case 'dm':
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return $this->exec("SET SCHEMA {$this->config->name}");
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default:
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return false;
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}
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}
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/**
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* Format sql.
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*
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* @param string $sql
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* @access public
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* @return string
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*/
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public function formatSQL($sql)
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{
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switch($this->config->driver)
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{
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case 'dm':
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return $this->formatDmSQL($sql);
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default:
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return $sql;
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}
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}
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/**
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* Format dm sql.
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*
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* @param string $sql
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* @access public
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* @return string
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*/
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public function formatDmSQL($sql)
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{
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$sql = trim($sql);
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$sql = $this->formatFunction($sql);
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if(defined('IN_UPGRADE'))
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{
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$sql = $this->processDmChangeColumn($sql);
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$sql = $this->processDmTableIndex($sql);
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}
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$actionPos = strpos($sql, ' ');
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$action = strtoupper(substr($sql, 0, $actionPos));
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$setPos = 0;
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switch($action)
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{
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case 'SELECT':
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return $this->formatField($sql);
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case 'REPLACE':
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$result = $this->processReplace($sql);
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if($result != $sql) return $result;
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$sql = str_replace('REPLACE', 'INSERT', $sql);
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$action = 'INSERT';
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case 'INSERT':
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case 'UPDATE':
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$setPos = stripos($sql, ' VALUES');
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$sql = str_replace('0000-00-00', '1970-01-01', $sql);
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$sql = str_replace('00:00:00', '00:00:01', $sql);
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if(strpos($sql, "\\'") !== FALSE) $sql = str_replace("\\'", "''''", $sql);
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if(strpos($sql, '\"') !== FALSE) $sql = str_replace('\"', '"', $sql);
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if(strpos($sql, '\\\\') !== FALSE) $sql = str_replace('\\\\', '\\', $sql);
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break;
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case 'CREATE':
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if(stripos($sql, 'CREATE VIEW') === 0) $sql = str_replace('CREATE VIEW', 'CREATE OR REPLACE VIEW', $sql);
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if(stripos($sql, 'CREATE FUNCTION') === 0) return '';
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if(stripos($sql, 'CREATE OR REPLACE VIEW ') === 0)
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{
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// Modify if function.
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$fieldsBegin = stripos($sql, 'select');
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$fieldsEnd = stripos($sql, 'from');
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$fields = substr($sql, $fieldsBegin+6, $fieldsEnd-$fieldsBegin-6);
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$fieldList = preg_split("/,(?![^(]+\))/", $fields);
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foreach($fieldList as $key => $field)
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{
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$aliasPos = stripos($field, ' AS ');
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$subField = substr($field, 0, $aliasPos);
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if(stripos($field, 'SUM(') === 0) $subField = substr($subField, 4, -1);
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$fieldParts = preg_split("/\+(?![^(]+\))/", $subField);
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foreach($fieldParts as $pkey => $fieldPart)
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{
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$originField = trim($fieldPart);
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if(stripos($originField, 'if(') === false) continue;
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$fieldParts[$pkey] = $this->formatDmIfFunction($originField);
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}
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$fieldList[$key] = str_replace($subField, implode(' + ', $fieldParts), $field);
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}
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$fields = implode(',', $fieldList);
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return substr($sql, 0, $fieldsBegin+6) . $fields . substr($sql, $fieldsEnd);
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}
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elseif(stripos($sql, 'CREATE UNIQUE INDEX') === 0 || stripos($sql, 'CREATE INDEX') === 0)
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{
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preg_match('/ON\s+[^.`\s]+\.`([^\s`]+)`/', $sql, $matches);
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$tableName = str_replace($this->config->prefix, '', $matches);
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$sql = preg_replace('/INDEX\ +\`/', 'INDEX `' . strtolower($tableName[1]) . '_', $sql);
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}
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case 'ALTER':
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$sql = $this->formatField($sql);
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$sql = $this->formatAttr($sql);
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return $sql;
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case 'SET':
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if(stripos($sql, 'SET SCHEMA') === 0) return $sql;
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case 'USE':
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return '';
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case 'DESC';
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$tableName = str_replace('DESC ', '', $sql);
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return "select COLUMN_NAME as Field from all_tab_columns where Table_Name='$tableName'";
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case 'DROP':
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return $this->formatField($sql);
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}
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if($setPos <= 0) return $sql;
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$fields = substr($sql, 0, $setPos);
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$fields = $this->formatField($fields);
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$sql = $fields . substr($sql, $setPos);
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/* DMDB must set IDENTITY_INSERT 'on' to insert id field. */
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if($action == 'INSERT' and stripos($fields, '"id"') !== FALSE)
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{
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$tableBegin = strpos($sql, '"' . $this->config->prefix);
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$tableEnd = strpos($sql, '"', $tableBegin + 1);
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$tableName = '' . $this->config->name . '."' . substr($sql, $tableBegin + 1, $tableEnd - $tableBegin - 1) . '"';
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return "SET IDENTITY_INSERT $tableName ON;" . $sql;
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}
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return $sql;
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}
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/**
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* Format field.
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*
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* @param string $sql
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* @access public
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* @return string
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*/
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public function formatField($sql)
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{
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switch($this->config->driver)
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{
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case 'dm':
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$sql = str_replace('`', '"', $sql);
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return $sql;
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default:
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return $sql;
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}
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}
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/**
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* Format dm table index.
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*
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* @param string $sql
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* @access public
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* @return string
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*/
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public function processDmTableIndex($sql)
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{
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if(strpos($sql, 'DROP INDEX') === FALSE) return $sql;
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return preg_replace('/DROP INDEX `(\w+)` ON `zt_(\w+)`/', 'DROP INDEX IF EXISTS `$2_$1`', $sql);
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}
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/**
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* Format dm change column.
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*
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* @param string $sql
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* @access public
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* @return string
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*/
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public function processDmChangeColumn($sql)
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{
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if(strpos($sql, 'CHANGE COLUMN') === FALSE) return $sql;
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return preg_replace('/ALTER TABLE `([^`]+)` CHANGE COLUMN `([^`]+)` `([^`]+)` (\w+)/', 'ALTER TABLE `$1` RENAME COLUMN `$2` TO `$3`;', $sql);
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}
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/**
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* Format function.
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*
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* @param string $sql
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* @access public
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* @return string
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*/
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public function formatFunction($sql)
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{
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switch($this->config->driver)
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{
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case 'dm':
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/* DATE convert to TO_CHAR. */
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$sql = preg_replace("/\bDATE\(([^)]*)\)/", "TO_CHAR($1, 'yyyy-mm-dd')", $sql, -1);
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return $sql;
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default:
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return $sql;
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}
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}
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/**
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* Format if function of dmdb.
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*
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* @param string $field
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* @access private
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* @return string
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*/
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public function formatDmIfFunction($field)
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{
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preg_match('/if\(.+\)+/i', $field, $matches);
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$if = $matches[0];
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if(substr_count($if, '(') == 1)
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{
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$pos = strpos($if, ')');
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$if = substr($if, 0, $pos+1);
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}
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/* fix sum(if(..., 1, 0)) , count(if(..., 1, 0)) */
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if(substr($if, strlen($if)-2) == '))' and (stripos($field, 'sum(') == 0 or stripos($field, 'count(') == 0)) $if = substr($if, 0, strlen($if)-1);
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$parts = explode(',', substr($if, 3, strlen($if)-4)); // remove 'if(' and ')'
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$case = 'CASE WHEN ' . implode(',', array_slice($parts, 0, count($parts)-2)) . ' THEN ' . $parts[count($parts)-2] . ' ELSE ' . $parts[count($parts)-1] . ' END';
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$field = str_ireplace($if, $case, $field);
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return $field;
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}
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/**
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* Format attribute of field.
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*
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* @param string $sql
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* @access public
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* @return string
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*/
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public function formatAttr($sql)
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{
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switch($this->config->driver)
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{
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case 'dm':
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$pos = stripos($sql, ' ENGINE');
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if($pos > 0) $sql = substr($sql, 0, $pos);
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$sql = preg_replace('/\(\ *\d+\ *\)/', '', $sql);
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$replace = array(
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" AUTO_INCREMENT" => ' IDENTITY(1, 1)',
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" int " => ' integer ',
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" mediumint " => ' integer ',
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" smallint " => ' integer ',
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" tinyint " => ' integer ',
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" varchar " => ' varchar(255) ',
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" char " => ' varchar(255) ',
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" mediumtext " => ' text ',
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" mediumtext," => ' text,',
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" longtext " => ' text ',
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"COLLATE 'utf8_general_ci'" => ' ',
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" unsigned " => ' ',
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" zerofill " => ' ',
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"0000-00-00" => '1970-01-01',
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);
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$sql = preg_replace('/ enum[\_0-9a-z\,\'\"\( ]+\)+/i', ' varchar(255) ', $sql);
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$sql = str_ireplace(array_keys($replace), array_values($replace), $sql);
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$sql = preg_replace('/\,\s+key[\_\"0-9a-z ]+\(+[\,\_\"0-9a-z ]+\)+/i', '', $sql);
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$sql = preg_replace('/\,\s*(unique|fulltext)*\s+key[\_\"0-9a-z ]+\(+[\,\_\"0-9a-z ]+\)+/i', '', $sql);
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$sql = preg_replace('/ float\s*\(+[\,\_\"0-9a-z ]+\)+/i', ' float', $sql);
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/* Convert "date" datetime to "date" datetime(0) to fix bug 25725, dm database datetime default 6 */
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preg_match_all('/"[0-9a-zA-Z]+" datetime/', $sql, $datetimeMatch);
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if(!empty($datetimeMatch))
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{
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foreach($datetimeMatch[0] as $match) $sql = str_replace($match, $match . '(0)', $sql);
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}
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if(strpos($sql, "ALTER TABLE") === 0)
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{
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$sql = $this->convertAlterTableSql($sql);
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if(stripos($sql, "ADD") !== false)
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{
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// 使用正则表达式匹配并去除 "AFTER" 关键字及其后面的内容
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$pattern = "/\s+AFTER\s+.+$/i";
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$sql = preg_replace($pattern, "", $sql);
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}
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}
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}
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return $sql;
|
|
}
|
|
|
|
/**
|
|
* Process replace into sql.
|
|
*
|
|
* @param mixed $sql
|
|
* @access public
|
|
* @return void
|
|
*/
|
|
public function processReplace($sql)
|
|
{
|
|
// 解析REPLACE INTO语句，提取出表名、字段和值
|
|
$matches = [];
|
|
preg_match('/^REPLACE\s+INTO\s+`?([\w_]+)`?\s*\((.*)\)\s+VALUES\s*\(([^()]+)\)\s*$/i', $sql, $matches);
|
|
if(empty($matches)) return $sql;
|
|
$table_name = $matches[1];
|
|
$columns = array_map('trim', explode(',', $matches[2]));
|
|
$values = array_map('trim', explode(', ', $matches[3]));
|
|
if($table_name == '' or $columns == '' or $values == '') return $sql;
|
|
|
|
// 构造SELECT语句，查询数据是否存在
|
|
$where = [];
|
|
foreach ($columns as $index => $column) {
|
|
$value = trim($values[$index], "'");
|
|
$column = trim($column, '`');
|
|
$values[$index] = $value;
|
|
$columns[$index] = $column;
|
|
$where[] = "`$column` = '$value'";
|
|
}
|
|
|
|
$select_sql = "SELECT * FROM `$table_name` WHERE " . implode(' AND ', $where);
|
|
|
|
$result = $this->query($select_sql);
|
|
$result = $result->fetchAll();
|
|
$sql = in_array('id', $columns) ? "SET IDENTITY_INSERT `$table_name` ON;" : '';
|
|
|
|
if($result)
|
|
{
|
|
// 数据已存在，构造UPDATE语句并执行
|
|
$set = [];
|
|
$where = [];
|
|
foreach ($columns as $index => $column) {
|
|
$value = $values[$index];
|
|
$set[] = "`$column` = '$value'";
|
|
$where[] = "`$column` = '$value'";
|
|
}
|
|
|
|
$sql .= "UPDATE `$table_name` SET " . implode(', ', $set) . " WHERE " . implode(' AND ', $where);
|
|
}
|
|
else
|
|
{
|
|
// 数据不存在，构造INSERT INTO语句并执行
|
|
$selectColumn = array();
|
|
$selectValue = array();
|
|
foreach ($columns as $index => $column) {
|
|
$selectColumn[] .= "`$column`";
|
|
$selectValue[] .= "'{$values[$index]}'";
|
|
}
|
|
$sql .= "INSERT INTO `$table_name` (" . implode(', ', $selectColumn) . ") VALUES (" . implode(', ', $selectValue) . ")";
|
|
}
|
|
|
|
return $sql;
|
|
}
|
|
|
|
/**
|
|
* Convert alter table sql.
|
|
*
|
|
* @param mixed $sql
|
|
* @access public
|
|
* @return void
|
|
*/
|
|
public function convertAlterTableSql($sql)
|
|
{
|
|
/* If table has datas and sql no default values defined, add default ''/0. */
|
|
if(strpos($sql, "NOT NULL") !== false && strpos($sql, "DEFAULT") === false)
|
|
{
|
|
$default = '';
|
|
if(strpos($sql, "integer") !== false) $default = 0;
|
|
$sql = str_replace("NOT NULL", "NOT NULL DEFAULT '" . $default ."'", $sql);
|
|
}
|
|
|
|
$pattern = '/ALTER TABLE "(.*?)" CHANGE "(.*?)" "(.*?)" (.*?)(?:;|$)/';
|
|
preg_match($pattern, $sql, $matches);
|
|
if(count($matches) != 5) return $sql;
|
|
|
|
$tableName = $matches[1];
|
|
$oldColumnName = $matches[2];
|
|
$newColumnName = $matches[3];
|
|
$params = str_replace("'", "''", $matches[4]);
|
|
|
|
$sql = 'begin ';
|
|
if($oldColumnName != $newColumnName) $sql .= "execute immediate 'ALTER TABLE $tableName ALTER " . '"' . $oldColumnName . '" RENAME TO "' . $newColumnName . '"' . "';";
|
|
$sql .= "execute immediate 'ALTER TABLE $tableName MODIFY " . '"' . $newColumnName . '" ' . $params . "';";
|
|
$sql .= 'end;';
|
|
|
|
return $sql;
|
|
}
|
|
|
|
/**
|
|
* Quote.
|
|
*
|
|
* @param string $string
|
|
* @param int $parameter_type
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function quote($string, $parameter_type = PDO::PARAM_STR)
|
|
{
|
|
return $this->pdo->quote($string, $parameter_type);
|
|
}
|
|
|
|
/**
|
|
* Get last insert id.
|
|
*
|
|
* @param string $name
|
|
* @access public
|
|
* @return string|false
|
|
*/
|
|
public function lastInsertId($name = null)
|
|
{
|
|
return $this->pdo->lastInsertId($name);
|
|
}
|
|
|
|
/**
|
|
* Begin transaction.
|
|
*
|
|
* @access public
|
|
* @return bool
|
|
*/
|
|
public function beginTransaction()
|
|
{
|
|
return $this->pdo->beginTransaction();
|
|
}
|
|
|
|
/**
|
|
* Check in transaction or not.
|
|
*
|
|
* @access public
|
|
* @return bool
|
|
*/
|
|
public function inTransaction()
|
|
{
|
|
return $this->pdo->inTransaction();
|
|
}
|
|
|
|
/**
|
|
* Roll back if transaction failed.
|
|
*
|
|
* @access public
|
|
* @return bool
|
|
*/
|
|
public function rollBack()
|
|
{
|
|
return $this->pdo->rollBack();
|
|
}
|
|
|
|
/**
|
|
* Commit transaction.
|
|
*
|
|
* @access public
|
|
* @return bool
|
|
*/
|
|
public function commit()
|
|
{
|
|
return $this->pdo->commit();
|
|
}
|
|
|
|
/**
|
|
* Prepares a statement for execution and returns a statement object.
|
|
*
|
|
* @access public
|
|
* @return bool
|
|
*/
|
|
public function prepare($query, $options = array())
|
|
{
|
|
return $this->pdo->prepare($query, $options);
|
|
}
|
|
}
|