Question

我用4条语句创建了一个存储过程

DELIMITER $$

CREATE PROCEDURE returnFunction()
BEGIN
        SELECT
            * 
        FROM
            tb_1 as 1;

        SELECT
            *
        FROM
            tb_2 as 2;
            
        SELECT
            *
        FROM
            tb_3 as 3;
            
        SELECT
            *
        FROM
            tb_4 as 4;
END;

像这样称呼这个sp

$query = "CALL returnFunction()";
$p_sql = connection::conn()->prepare($query);
$p_sql->execute(); 
do {
     $rows = $p_sql->fetchAll(PDO::FETCH_NUM);
     if ($rows) 
     {
          print_r($rows);
     }
   } while ($p_sql->nextRowset());

这将所有语句的结果一起返回。

我需要将结果带到第一条语句并将其放入变量$ v1中第二条语句变量$ v2 第三个语句变量$ v3 第四个语句变量$ v4

我该怎么做？

Answer 1

您可以使用variable variables快速生成变量名：

$query = "CALL returnFunction()";
$p_sql = connection::conn()->prepare($query);
$p_sql->execute(); 
$i = 1;
do {
     $rows = $p_sql->fetchAll(PDO::FETCH_NUM);
     if ($rows) 
     {
          print_r($rows);
          ${"v$i"} = $rows;
     }
     $i++;
} while ($p_sql->nextRowset());

这会将每个非空结果集放在变量$v1，$v2等中。但是您应该考虑只使用数组：

$query = "CALL returnFunction()";
$p_sql = connection::conn()->prepare($query);
$p_sql->execute(); 
$v = array();
do {
     $rows = $p_sql->fetchAll(PDO::FETCH_NUM);
     if ($rows) 
     {
          print_r($rows);
          $v[] = $rows;
     }
} while ($p_sql->nextRowset());

请注意，如果您也要存储空结果集，请将分配移到if块之外。

Answer 2

您可以使用如下所示的并集并输出v1，v2，v3，v4，然后将它们分配给变量

SELECT MAX(v1) as v1,MAX(v2) as v2,MAX(v3) as v3,MAX(v4) as v4
FROM
(       
SELECT 1.x AS v1,NULL  AS v2,NULL AS v3, NULL AS v4 
FROM tb_1 AS 1
UNION ALL
SELECT NULL AS v2,2.x  AS v2,NULL AS v3, NULL AS v4
FROM tb_2 AS 2
UNION ALL    
SELECT NULL AS v2,NULL AS v2,3.x AS v3, NULL AS v4
FROM tb_3 AS 3
UNION ALL    
SELECT NULL AS v2,NULL AS v2,NULL AS v3, 4.x AS v4
FROM tb_4 AS 4
) A

使用PHP从存储过程中检索多个结果集

2 个答案: