How stored procedures are fast in Mysql .
Where it is suitable to use stored procedures (insert,update,select)
How can we make stored procedure of a complex query returning 100000 rows and how can we get these records on php form.
any example of such stored procedure using select query returning multiple rows ?
well for example we will work with the following mysql procedure:
DELIMITER $$
DROP PROCEDURE IF EXISTS `ejemplos`.`queryEmployees` $$
CREATE DEFINER=`root`#`localhost` PROCEDURE `queryEmployees`(IN param VARCHAR(1))
BEGIN
IF param='1' THEN
SELECT * FROM empleados;
END IF;
END $$
DELIMITER ;
And we get the records in php as the following :
<?php
$mysqli = new mysqli('localhost', 'root', '1234', 'ejemplos');
$resultado_consulta = $mysqli->query("CALL queryEmployees('1')");
?>
<table>
<?php
while ($registro = $resultado_consulta->fetch_object())
{
?><tr><td><?php echo $registro->first_name;?> </td></tr><?php
}
?>
</table>
I hope this can help u...
Related
how i can get output value from stored procedure to php variable ..
example Stored procedure :
DROP PROCEDURE `test`; CREATE DEFINER=`mydbinstance`#`%` PROCEDURE `test`(OUT `max` INT(11)) NOT DETERMINISTIC MODIFIES SQL DATA SQL SECURITY DEFINER
BEGIN
SELECT MAX(slno)+1 INTO #max FROM table1;
SELECT #max;
END
php:
$stmt=mysqli_query($conn,"CALL test();");
You should be able to get the result(s) of a stored procedure the same way you would any other query:
$stmt = mysqli_query($conn,"CALL test();");
if ($row = mysqli_fetch_row($stmt)) {
$value = $row[0];
}
I'm trying to get a value from a stored procedure in php but I can't do it.
My stored procedure:
DROP PROCEDURE IF EXISTS sp_table;
DELIMITER $$
CREATE PROCEDURE sp_table()
BEGIN
SELECT COUNT(*) FROM table;
END$$
DELIMITER ;
My PHP code:
$recordSet_table = $conn->query("CALL sp_table()");
print_r($recordSet_table)."<br><br>";
Please try following code.
$sql = mysqli_query($connectionVariable,"CALL sp_table(#count)");
$result = mysqli_fetch_array($sql);
I have created the following stored procedure in mysql...
DELIMITER //
CREATE PROCEDURE GetMember(IN in_memberID int)
BEGIN
SELECT *
FROM Members
WHERE MemberID = in_memberID;
END//
$result = mysql_query("CALL GetMember(".$memberID.")") or die(mysql_error());
while ($row = mysql_fetch_array($result)) {
echo $row['Name'] . "</br>";
}
But when I call it from php it returns all records in the Members table, what am I doing wrong?
EDIT:
When I try to call the query within phpmyadmin I get this error
CALL GetMember(1);
#1312 - PROCEDURE myDb.GetMember can't return a result set in the given context
what version of PHP?
PHP 5.2.3 and PHP 5.2.4 have a bug with procedures:
https://bugs.php.net/bug.php?id=42548
use Database_Name;
DELIMETER $$
DROP PROCEDURE IF EXISTS Proc$$
CREATE PROCEDURE Proc()
BEGIN
DECLARE x INT;
SET x = 1;
WHILE x <= 110000 DO
INSERT INTO Table_Name (word, mean) VALUES ('a', 'a mean');
SET x = x + 1;
END WHILE;
END$$
DELIMITER ;
I've been trying to find an answer to this question, but haven't found any definitive "yes" or "no" in all my research.
I'm running a simple MySQL query like this:
UPDATE item SET `score`=`score`+1 WHERE `id`=1
Is there a way for that query to return the updated value, instead of the number of rows affected? Just as a reference, I'm doing this in PHP, so the actual code looks like:
$sql = "UPDATE item SET `score`=`score`+1 WHERE `id`=1";
$new_value = mysql_query($sql);
//Unfortunately this does not return the new value
I know I could do a second query and just SELECT the value, but I'm trying to cut down on queries as much as possible. Is there a way?
You can do it with a stored procedure that updates, and then selects the new value into an output parameter.
The following returns one column new_score with the new value.
DELIMITER $$ -- Change DELIMITER in order to use ; withn the procedure
CREATE PROCEDURE increment_score
(
IN id_in INT
)
BEGIN
UPDATE item SET score = score + 1 WHERE id = id_in;
SELECT score AS new_score FROM item WHERE id = id_in;
END
$$ -- Finish CREATE PROCEDURE statement
DELIMITER ; -- Reset DELIMITER to standard ;
In PHP:
$result = mysql_query("CALL increment_score($id)");
$row = mysql_fetch_array($result);
echo $row['new_score'];
No, there's nothing like postgresql's UPDATE ... RETURNING output_expression in MySQL (yet?).
If you don't want to run another Query SELECT then here is another way to do it. I have modified Mr. Berkowski code for reference:
DELIMITER $$
CREATE PROCEDURE increment_score
(
IN id_in INT
)
BEGIN
set #newScore := null;
UPDATE item SET score = IF((#newScore := score+1) <> NULL IS NULL, #newScore, NULL) WHERE id = id_in;
SELECT #newScore;
END
DELIMITER ;
No you cant. You could make a function or stored procedure that could do the insert and return the updated value but that would still require you to execute two queries from within the function or stored procedure.
You can create a trigger, and you will know everything about the modifications.
The table[file_request ] structure:
user_id[INT] file_id[CHAR(10)] all_files
This is the SQL code which work fine in MySQL clien: I am using heidisql
DROP PROCEDURE IF EXISTS check_user_files;
DELIMITER \\
CREATE PROCEDURE check_user_files(IN p_user_id INT,IN p_file_id CHAR(10),IN p_all_files VARCHAR(500))
BEGIN
IF EXISTS(SELECT 1 FROM file_request WHERE user_id = p_user_id AND movie_id = p_file_id) THEN
UPDATE file_request SET `requring_date`=NOW(),`all_files`= p_all_files WHERE `user_id`=p_user_id AND `movie_id`=p_file_id;
ELSE
INSERT INTO file_request (`user_id`,`requring_date`,`movie_id`,`all_files`)
VALUES (p_user_id,NOW(),p_file_id,p_all_files);
END IF;
END \\
DELIMITER ;
CALL check_user_files('23','T40431284','07 08 10 11 13 14');
DELIMITER ;
CALL check_user_files('23','F87951','01 02 03');
And I trying to create and execute the SQL query from PHP [didn't work] :
// create the call procedure statements
foreach($fileData as $key=>$value){
$callSP .= "DELIMITER ; \n
CALL check_user_files('$userID','$key','$value');\n";
}
$insert_file_request_query = "DROP PROCEDURE IF EXISTS check_user_files;
DELIMITER \\\\
CREATE PROCEDURE check_user_files(IN p_user_id INT,IN p_file_id CHAR(10),IN p_all_files VARCHAR(500))
BEGIN
IF EXISTS(SELECT 1 FROM file_request WHERE user_id = p_user_id AND movie_id = p_file_id) THEN
UPDATE file_request SET `requring_date`=NOW(),`all_files`= p_all_files WHERE `user_id`=p_user_id AND `movie_id`=p_file_id;
ELSE
INSERT INTO file_request (`user_id`,`requring_date`,`movie_id`,`all_files`)
VALUES (p_user_id,NOW(),p_file_id,p_all_files);
END IF;
END \\\\
$callSP";
mysqli_query($conn,$insert_file_request_query);
The SQL query which created from PHP didn't work as in the MySQL client!?
So, how can I fix it!?
[update1]
I found that the SQL query must in the special format [ the formate which work fine in the MySQL client] or shouldn't work,I tried to copy and paste the query which echo from the PHP, the query code become one line and couldn't execute in MySQL client,too.
[update2]
The code of create store procedure will work fine when I execute it alone from PHP.I mean,I split the whole process into three parts and execute them one by one.
part1: drop the procedure if it was exists; [using mysqli_query()]
part2: create the procedure;[using mysqli_query()]
part3：call the procedure;[using mysqli_multi_query()]
$insert_file_request_query = '';
foreach($fileData as $key=>$value){
$insert_file_request_query .= "CALL check_save_file_request('$userID','$key','$value');";
}
mysqli_multi_query($conn,$insert_file_request_query);
And my final solution was to create the Store Procedure in MySQL and call it from the PHP.It works fine now.
Thank you very much!!
You can't combine multiple statements in mysqli_query. Split out the definition of the stored procedure from the CALLs to it. If that still fails, we'll need the full and exact error message that you receive.