[英]Cursor can't execute through a prepare statement in mysql stored procedure?
[英]mysql stored procedure execute prepare statement not working
我需要在存儲過程中使用准備好的語句,但是我不明白為什么它不起作用。 我有mysql5.7.9,我從PHP-> PDO調用它
CREATE PROCEDURE my_sp(
OUT out_result VARCHAR(32)
)
BEGIN
/*This work OK*/
SELECT pow(2,2) INTO out_result;
/*NOT work Variable prefixed with @ */
SELECT pow(2,2) INTO @out_result;
/*NOT work (with or without @ before out_result variable)*/
PREPARE stmt FROM 'SELECT pow(2,2) INTO out_result';
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
END;
您沒有將@out_result當作變量
嘗試將其添加到BEGIN下方
SET @out_result = out_result;
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