Question

SQL

CREATE PROCEDURE `my_sp`(
  IN in_var VARCHAR(32),
  OUT out_var VARCHAR(255)
)
BEGIN

  /*This work OK*/  
  SELECT my_column INTO out_var FROM my_table WHERE my_column = in_var LIMIT 1;

  /*This not work*/
  SELECT * INTO out_var FROM my_table WHERE my_column = in_var LIMIT 1;

END;

PHP

$dbh = new PDO( $connection_params );
$sql = "CALL my_sp( :in_var , @outvar )";
$stmt = $dbh->prepare( $sql );
$stmt->execute( array( ':in_var' => $_POST['in_var'] ) );

$sql = "SELECT @outvar";
$query = $dbh->query( $sql );
$result = $query->fetchAll( PDO::FETCH_ASSOC );

当我尝试'SELECT * ...'然后在php var_dump（$ stmt）中返回false;

我从MySQL开始，我不知道你是否不能在存储过程中进行这种类型的查询（SELECT *），或者它是别的什么？

Answer 1

删除CREATE PROCEDURE `my_sp`( IN in_var VARCHAR(32) ) BEGIN SELECT * FROM my_table WHERE my_column = in_var LIMIT 1; END;声明，您将能够获取所有列：

{{1}}

或者您可以为每列声明一个变量。

mysql存储过程SELECT * into out参数不起作用

1 个答案: