335 lines
10 KiB
PHP
335 lines
10 KiB
PHP
#!/usr/bin/env php
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<?php
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include '../lib/dbh/dbh.class.php';
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$config = new stdclass();
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$config->db = new stdclass();
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$config->default = new stdclass();
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function getWebRoot() {}
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include '../config/my.php';
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if(!file_exists('dmconfig.php'))
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{
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print("Please create the config file named 'dmconfig.php' in this directory. Config example:");
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print <<<EOT
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<?php
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\$dmConfig = new stdclass();
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\$dmConfig->driver = 'dm';
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\$dmConfig->host = '10.0.7.242';
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\$dmConfig->port = '5236';
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\$dmConfig->name = 'lybiz85';
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\$dmConfig->user = 'SYSDBA';
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\$dmConfig->encoding = 'UTF8';
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\$dmConfig->prefix = 'zt_';
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\$dmConfig->password = 'SYSDBA001';
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EOT;
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exit;
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}
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echo "开始迁移MySQL数据到达梦数据库\n\n";
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include 'dmconfig.php';
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function formatSQL($sql)
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{
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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] = 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, $fieldsEnd);
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}
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function formatDmIfFunction($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 $field;
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}
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$mysql = new dbh($config->db);
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$stmt = $mysql->query('SHOW TABLES');
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$data = $stmt->fetchAll(PDO::FETCH_ASSOC);
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$tables = array();
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$views = array();
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$indexes = array(); //普通索引
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$tablePrimary = array(); //表的主键
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foreach($data as $table)
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{
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$table = current($table);
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/* Table. */
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if(strpos($table, 'zt_') === 0)
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{
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$stmt = $mysql->prepare('DESC ' . $table);
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$stmt->execute();
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$fields = $stmt->fetchAll(PDO::FETCH_ASSOC);
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/* Table. */
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$tables[$table] = array();
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foreach($fields as $field)
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{
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$type = strtolower(explode('(', $field['Type'])[0]);
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$type = trim(str_replace('unsigned', '', $type));
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switch($type)
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{
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case 'int':
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case 'mediumint':
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case 'smallint':
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case 'tinyint':
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$type = 'integer';
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break;
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case 'enum':
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case 'varchar':
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case 'char':
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$type = 'varchar(255)';
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break;
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case 'mediumtext':
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case 'longtext':
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$type = 'text';
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break;
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}
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$tables[$table][$field['Field']] = array(
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'type' => $type,
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'name' => $field['Field'],
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'null' => $field['Null'] == 'YES',
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'default' => $field['Default'],
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//'isPrimary' => $field['Key'] == 'PRI', // 不需要从DESC读取索引
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'autoIncrement' => $field['Extra'] == 'auto_increment',
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);
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}
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/* Index. */
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$stmt = $mysql->prepare('SHOW INDEX FROM ' . $table);
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$stmt->execute();
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$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
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if($result)
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{
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foreach($result as $item)
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{
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$keyName = $item['Key_name'];
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/* 主键索引在创建表的时候一起创建。 */
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if($keyName == 'PRIMARY')
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{
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if(!isset($tablePrimary[$table])) $tablePrimary[$table] = array();
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$tablePrimary[$table][(int)$item['Seq_in_index']-1] = $item['Column_name'];
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continue;
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}
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/* 其他索引单独创建。 */
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if(!isset($indexes[$table . $keyName])) $indexes[$table . $keyName] = array('table' => $table, 'name' => $keyName, 'type' => $item['Index_type'], 'isUnique' => !$item['Non_unique'], 'cols' => array());
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/* 达梦的全文索引只支持一个字段。 */
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if($item['Index_type'] == 'FULLTEXT' && $item['Column_name'] != 'title') continue;
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$indexes[$table . $keyName]['cols'][(int)$item['Seq_in_index']-1] = $item['Column_name'];
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}
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}
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}
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/* View. */
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elseif(strpos($table, 'ztv_') === 0)
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{
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$stmt = $mysql->prepare('SHOW CREATE VIEW ' . $table);
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$stmt->execute();
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$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
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$pos = stripos($result[0]['Create View'], ' as ');
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$sql = substr($result[0]['Create View'], $pos + 4);
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$sql = str_replace('`', '"', $sql);
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$views[$table] = array(
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'sql' => formatSQL($sql),
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);
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}
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}
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echo "初始化表空间和用户\n";
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$dm = new dbh($dmConfig, false);
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/* Delete. */
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$tableSpace = strtoupper($dmConfig->name);
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$res = $dm->query("SELECT * FROM dba_users WHERE username = '{$dmConfig->name}'")->fetchAll();
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if(!empty($res))
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{
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$dropUser = "DROP USER \"{$dmConfig->name}\" CASCADE";
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$dm->rawQuery($dropUser);
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}
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$tableSpace = strtoupper($dmConfig->name);
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$res = $dm->query("SELECT * FROM dba_data_files WHERE TABLESPACE_NAME = '$tableSpace'")->fetchAll();
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if(!empty($res))
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{
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$dropTableSpace = "DROP TABLESPACE \"$tableSpace\"";
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$dm->rawQuery($dropTableSpace);
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}
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/* Create. */
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$createTableSpace = "CREATE TABLESPACE \"$tableSpace\" DATAFILE '{$dmConfig->name}.DBF' size 150 AUTOEXTEND ON";
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$createUser = "CREATE USER \"{$dmConfig->name}\" IDENTIFIED by {$dmConfig->password} DEFAULT TABLESPACE \"{$dmConfig->name}\" DEFAULT INDEX TABLESPACE \"{$dmConfig->name}\"";
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$dm->query($createTableSpace);
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$dm->query($createUser);
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$createSchema = "CREATE SCHEMA \"{$dmConfig->name}\" AUTHORIZATION \"{$dmConfig->name}\"";
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$dm->query($createSchema);
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echo "生成达梦数据表结构\n";
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$dm = new dbh($dmConfig);
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$identityTables = array(); //标记有自增字段的表，插入数据的时候会判断
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/* 插入表结构。 */
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foreach($tables as $table => $fields)
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{
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$sql = "CREATE TABLE IF NOT EXISTS \"$table\" (\n";
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foreach(array_values($fields) as $key => $field)
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{
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$sql .= '"' . $field['name'] . '" ' . $field['type'] . ($field['null'] ? ' NULL ' : ' NOT NULL ');
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if($field['default'] !== NULL && $field['default'] != 'CURRENT_TIMESTAMP') $sql .= " DEFAULT '{$field['default']}' ";
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if($field['autoIncrement'])
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{
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$sql .= " IDENTITY(1, 1) ";
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$identityTables[$table] = $table;
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}
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$sql .= $key == count(array_values($fields))-1 && !isset($tablePrimary[$table]) ? "\n" : ",\n";
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}
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if(isset($tablePrimary[$table]))
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{
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$primary = array();
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ksort($tablePrimary[$table]);
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foreach($tablePrimary[$table] as $col) $primary[] = '"' . $col . '"';
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$sql .= "NOT CLUSTER PRIMARY KEY (" . implode(',', $primary) . ")"; // 只有NOT CLUSTER可以删除
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}
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$sql .= "\n)\n";
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$dm->rawQuery($sql);
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}
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echo "生成达梦表索引\n";
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foreach($indexes as $index)
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{
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$name = strtolower($index['table']) . '_' . $index['name'];
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foreach($index['cols'] as $col)
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{
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$fields = array();
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ksort($index['cols']);
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foreach($index['cols'] as $col)
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{
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$fields[] = '"' . $col . '"';
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}
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}
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$sql = 'CREATE ';
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if($index['isUnique']) // 唯一索引
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{
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$sql .= ' UNIQUE ';
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}
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elseif($index['type'] == 'FULLTEXT') // 全文索引
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{
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$sql .= ' CONTEXT ';
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}
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$sql .= ' INDEX "' . $name . '" ON `' . $index['table'] . '` (' . implode(',', $fields) . ')';
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$dm->rawQuery($sql);
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}
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echo "生成达梦视图\n";
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/* 插入视图结构。 */
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foreach($views as $view => $info)
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{
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$sql = str_replace('convert(', '(', $info['sql']);
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$sql = str_replace('using utf8mb3', '', $sql);
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$sql = str_replace('using utf8_general_ci', '', $sql);
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$dm->rawQuery("CREATE OR REPLACE VIEW \"$view\" AS " . $sql);
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}
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echo "开始插入数据，请耐心等待...";
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foreach($tables as $table => $fields)
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{
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$dm->rawQuery("DELETE FROM `$table`");
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$rows = $mysql->query("SELECT * FROM `$table`")->fetchAll(PDO::FETCH_ASSOC);
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if(empty($rows)) continue;
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$fs = array();
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foreach($fields as $field) $fs[] = '"' . $field['name'] . '"';
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$fs = implode(',', $fs);
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$template = "INSERT INTO \"$table\"($fs) VALUES";
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$step = 500;
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$begin = 0;
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$data = array();
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for($key = $begin; $key < count($rows); $key++)
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{
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$row = $rows[$key];
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$values = array();
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foreach($fields as $field)
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{
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$value = str_replace("'", "''''", $row[$field['name']]);
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$value = "'{$value}'";
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if($value == "'0000-00-00 00:00:00'" || $value == "'0000-00-00'")
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{
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$null = $tables[$table][$field['name']]['null'];
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$value = $null ? 'NULL': '1970-01-01';
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}
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$values[] = $value;
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}
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$values = '(' . implode(',', $values) . ')';
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$data[] = $values;
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}
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$sql = $template . implode(',', $data) . ';';
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if(isset($identityTables[$table])) $sql = "SET IDENTITY_INSERT $table ON;" . $sql;
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$dm->rawQuery($sql);
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}
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echo "\n迁移成功，修改my.php测试一下吧\n\n";
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