在使用Symfony運行sql之前檢查表存在的問題sfPropelMigrationsLightPlugin

Question

我想在遷移的up（）方法中運行create SQL語句之前檢查是否存在表。

我可以運行類似：

$count = $this->executeSQL("SELECT count(*) FROM information_schema.TABLES where TABLE_NAME = 'table_name';"); 

if($count == 0) 
{ 
    $this->executeSQL("Create SQL ..."); 
} 

的問題是，這將返回以下錯誤：

SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. Consider using PDOStatement::fetchAll(). Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute.

任何想法如何解決這個問題？

Answer 1

我啞......

IF NOT EXISTS

$this->executeSQL("CREATE TABLE `foo` IF NOT EXISTS");