基本信息
源码名称:php实现MYSQL数据结构差异比对,并生成可执行sql脚本
源码大小:2.37KB
文件格式:.php
开发语言:PHP
更新时间:2024-05-26
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源码介绍
<?php
// 假设这是你的数据库类
class Database {
private $connection;
public function __construct($host, $user, $password, $database) {
$this->connection = new mysqli($host, $user, $password, $database);
if ($this->connection->connect_error) {
die("连接失败: " . $this->connection->connect_error);
}
}
public function getSchemaDiff($table1, $table2) {
$query = "SHOW CREATE TABLE `{$table1}`";
$result = $this->connection->query($query);
$row1 = $result->fetch_assoc();
$query = "SHOW CREATE TABLE `{$table2}`";
$result = $this->connection->query($query);
$row2 = $result->fetch_assoc();
// 这里使用第三方库进行比对
// 例如 https://github.com/bradlarsen/SimpleDiff
// 需要先通过composer安装这个库
require 'vendor/autoload.php';
use Diff\Differ;
use Diff\Diff;
$differ = new Differ();
$diff = $differ->diff($row1['Create Table'], $row2['Create Table']);
// 输出差异并格式化为SQL语句
$diffSql = "";
foreach ($diff as $change) {
$action = $change->getTag();
$value = $change->getValue();
switch ($action) {
case Diff::INSERT:
// 在原表结构中插入这部分
$diffSql .= "ALTER TABLE `{$table1}` " . substr($value, 0, -1) . ";";
break;
case Diff::DELETE:
// 在目标表结构中删除这部分
$diffSql .= "ALTER TABLE `{$table2}` " . substr($value, 0, -1) . ";";
break;
case Diff::EQUAL:
// 结构相同,不做操作
break;
case Diff::CHANGE:
// 在原表和目标表结构都进行修改
$diffSql .= "ALTER TABLE `{$table1}` " . substr($change->getOldValue(), 0, -1) . ";";
$diffSql .= "ALTER TABLE `{$table2}` " . substr($change->getNewValue(), 0, -1) . ";";
break;
}
}
return $diffSql;
}
}
// 使用示例
$db = new Database('localhost', 'username', 'password', 'database');
$table1 = 'table_name_1';
$table2 = 'table_name_2';
$sqlDiff = $db->getSchemaDiff($table1, $table2);
echo $sqlDiff;
<?php
// 假设这是你的数据库类
class Database {
private $connection;
public function __construct($host, $user, $password, $database) {
$this->connection = new mysqli($host, $user, $password, $database);
if ($this->connection->connect_error) {
die("连接失败: " . $this->connection->connect_error);
}
}
public function getSchemaDiff($table1, $table2) {
$query = "SHOW CREATE TABLE `{$table1}`";
$result = $this->connection->query($query);
$row1 = $result->fetch_assoc();
$query = "SHOW CREATE TABLE `{$table2}`";
$result = $this->connection->query($query);
$row2 = $result->fetch_assoc();
// 这里使用第三方库进行比对
// 例如 https://github.com/bradlarsen/SimpleDiff
// 需要先通过composer安装这个库
require 'vendor/autoload.php';
use Diff\Differ;
use Diff\Diff;
$differ = new Differ();
$diff = $differ->diff($row1['Create Table'], $row2['Create Table']);
// 输出差异并格式化为SQL语句
$diffSql = "";
foreach ($diff as $change) {
$action = $change->getTag();
$value = $change->getValue();
switch ($action) {
case Diff::INSERT:
// 在原表结构中插入这部分
$diffSql .= "ALTER TABLE `{$table1}` " . substr($value, 0, -1) . ";";
break;
case Diff::DELETE:
// 在目标表结构中删除这部分
$diffSql .= "ALTER TABLE `{$table2}` " . substr($value, 0, -1) . ";";
break;
case Diff::EQUAL:
// 结构相同,不做操作
break;
case Diff::CHANGE:
// 在原表和目标表结构都进行修改
$diffSql .= "ALTER TABLE `{$table1}` " . substr($change->getOldValue(), 0, -1) . ";";
$diffSql .= "ALTER TABLE `{$table2}` " . substr($change->getNewValue(), 0, -1) . ";";
break;
}
}
return $diffSql;
}
}
// 使用示例
$db = new Database('localhost', 'username', 'password', 'database');
$table1 = 'table_name_1';
$table2 = 'table_name_2';
$sqlDiff = $db->getSchemaDiff($table1, $table2);
echo $sqlDiff;