How can I change this stored procedure mysql code into pure mysql code





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I want to change this stored procedure code to pure mysql code and I did this but it complains DECLARE productQuantity INT and says the variable is not set or exist



I have tried changing the code to my own understanding by deleting the stored procedure code (function) from the pure code



-- Create shopping_cart_add_product stored procedure

CREATE PROCEDURE shopping_cart_add_product(IN inCartId CHAR(32),

IN inProductId INT, IN inAttributes VARCHAR(1000))

BEGIN

    DECLARE productQuantity INT;

    -- Obtain current shopping cart quantity for the product

    SELECT quantity

    FROM shopping_cart

    WHERE cart_id = inCartId

    AND product_id = inProductId

    AND attributes = inAttributes

    INTO productQuantity;



    IF productQuantity IS NULL THEN

        INSERT INTO shopping_cart(cart_id, product_id, attributes,

        quantity, added_on)

        VALUES (inCartId, inProductId, inAttributes, 1, NOW());

    ELSE

        UPDATE shopping_cart

        SET quantity = quantity + 1, buy_now = true

        WHERE cart_id = inCartId

        AND product_id = inProductId

        AND attributes = inAttributes;

    END IF;

END$$


and this is the code I change it to



public function addProductToCart($cart_id, $product_id, $attributes){

        $addProduct = 'DECLARE productQuantity INT ';

        $addProduct .= 'SELECT  * FROM `shopping_cart` WHERE cart_id = 

' . $cart_id . ' AND product_id = ' . $product_id;

    $addProduct .= ' AND attributes = ' . $attributes . ' INTO 

productQuantity ';

        $addProduct .= 'IF productQuantity IS NULL THEN INSERT INTO 

`shopping_cart`(';

    $addProduct .= 'cart_id, product_id, attributes, quantity, added_on) VALUES (';

    $addProduct .= $cart_id . ', ' . $product_id . ', ' . $attributes . ', 1 , 1 , NOW()';

    $addProduct .= ' ELSE UPDATE `shopping_cart` SET quantity = quantity + 1, buy_now = true WHERE cart_id = ' . $cart_id;

    $addProduct .= ' AND product_id = ' . $product_id . ' AND attributes = ' . $attributes;



    $parameters = ['cart_id' => $cart_id, 'product_id' => $product_id, 'attributes' => $attributes];



    $query = $this->query($addProduct, $parameters);

    return $query;

}



private function query($sql, $parameters = ) {

    $query = $this->pdo->prepare($sql);

    $query->execute($parameters);

    return $query;

}


This code is written in PHP7



I expect it to insert or update the affected rows in the database table






php mysql sql







share|improve this question




















  • 2





    You completely miss the point of preparing a statement and binding the variables. You should start with the manual: php.net/manual/en/pdo.prepare.php. And you are running multiple sql statements in 1 query, which probably will not work, even when you separate the statements correctly with an ;.

    – jeroen
    Jan 3 at 8:24




















0















I want to change this stored procedure code to pure mysql code and I did this but it complains DECLARE productQuantity INT and says the variable is not set or exist



I have tried changing the code to my own understanding by deleting the stored procedure code (function) from the pure code



-- Create shopping_cart_add_product stored procedure

CREATE PROCEDURE shopping_cart_add_product(IN inCartId CHAR(32),

IN inProductId INT, IN inAttributes VARCHAR(1000))

BEGIN

    DECLARE productQuantity INT;

    -- Obtain current shopping cart quantity for the product

    SELECT quantity

    FROM shopping_cart

    WHERE cart_id = inCartId

    AND product_id = inProductId

    AND attributes = inAttributes

    INTO productQuantity;



    IF productQuantity IS NULL THEN

        INSERT INTO shopping_cart(cart_id, product_id, attributes,

        quantity, added_on)

        VALUES (inCartId, inProductId, inAttributes, 1, NOW());

    ELSE

        UPDATE shopping_cart

        SET quantity = quantity + 1, buy_now = true

        WHERE cart_id = inCartId

        AND product_id = inProductId

        AND attributes = inAttributes;

    END IF;

END$$


and this is the code I change it to



public function addProductToCart($cart_id, $product_id, $attributes){

        $addProduct = 'DECLARE productQuantity INT ';

        $addProduct .= 'SELECT  * FROM `shopping_cart` WHERE cart_id = 

' . $cart_id . ' AND product_id = ' . $product_id;

    $addProduct .= ' AND attributes = ' . $attributes . ' INTO 

productQuantity ';

        $addProduct .= 'IF productQuantity IS NULL THEN INSERT INTO 

`shopping_cart`(';

    $addProduct .= 'cart_id, product_id, attributes, quantity, added_on) VALUES (';

    $addProduct .= $cart_id . ', ' . $product_id . ', ' . $attributes . ', 1 , 1 , NOW()';

    $addProduct .= ' ELSE UPDATE `shopping_cart` SET quantity = quantity + 1, buy_now = true WHERE cart_id = ' . $cart_id;

    $addProduct .= ' AND product_id = ' . $product_id . ' AND attributes = ' . $attributes;



    $parameters = ['cart_id' => $cart_id, 'product_id' => $product_id, 'attributes' => $attributes];



    $query = $this->query($addProduct, $parameters);

    return $query;

}



private function query($sql, $parameters = ) {

    $query = $this->pdo->prepare($sql);

    $query->execute($parameters);

    return $query;

}


This code is written in PHP7



I expect it to insert or update the affected rows in the database table






php mysql sql







share|improve this question




















  • 2





    You completely miss the point of preparing a statement and binding the variables. You should start with the manual: php.net/manual/en/pdo.prepare.php. And you are running multiple sql statements in 1 query, which probably will not work, even when you separate the statements correctly with an ;.

    – jeroen
    Jan 3 at 8:24
















0












0








0








I want to change this stored procedure code to pure mysql code and I did this but it complains DECLARE productQuantity INT and says the variable is not set or exist



I have tried changing the code to my own understanding by deleting the stored procedure code (function) from the pure code



-- Create shopping_cart_add_product stored procedure

CREATE PROCEDURE shopping_cart_add_product(IN inCartId CHAR(32),

IN inProductId INT, IN inAttributes VARCHAR(1000))

BEGIN

    DECLARE productQuantity INT;

    -- Obtain current shopping cart quantity for the product

    SELECT quantity

    FROM shopping_cart

    WHERE cart_id = inCartId

    AND product_id = inProductId

    AND attributes = inAttributes

    INTO productQuantity;



    IF productQuantity IS NULL THEN

        INSERT INTO shopping_cart(cart_id, product_id, attributes,

        quantity, added_on)

        VALUES (inCartId, inProductId, inAttributes, 1, NOW());

    ELSE

        UPDATE shopping_cart

        SET quantity = quantity + 1, buy_now = true

        WHERE cart_id = inCartId

        AND product_id = inProductId

        AND attributes = inAttributes;

    END IF;

END$$


and this is the code I change it to



public function addProductToCart($cart_id, $product_id, $attributes){

        $addProduct = 'DECLARE productQuantity INT ';

        $addProduct .= 'SELECT  * FROM `shopping_cart` WHERE cart_id = 

' . $cart_id . ' AND product_id = ' . $product_id;

    $addProduct .= ' AND attributes = ' . $attributes . ' INTO 

productQuantity ';

        $addProduct .= 'IF productQuantity IS NULL THEN INSERT INTO 

`shopping_cart`(';

    $addProduct .= 'cart_id, product_id, attributes, quantity, added_on) VALUES (';

    $addProduct .= $cart_id . ', ' . $product_id . ', ' . $attributes . ', 1 , 1 , NOW()';

    $addProduct .= ' ELSE UPDATE `shopping_cart` SET quantity = quantity + 1, buy_now = true WHERE cart_id = ' . $cart_id;

    $addProduct .= ' AND product_id = ' . $product_id . ' AND attributes = ' . $attributes;



    $parameters = ['cart_id' => $cart_id, 'product_id' => $product_id, 'attributes' => $attributes];



    $query = $this->query($addProduct, $parameters);

    return $query;

}



private function query($sql, $parameters = ) {

    $query = $this->pdo->prepare($sql);

    $query->execute($parameters);

    return $query;

}


This code is written in PHP7



I expect it to insert or update the affected rows in the database table






php mysql sql







share|improve this question
















I want to change this stored procedure code to pure mysql code and I did this but it complains DECLARE productQuantity INT and says the variable is not set or exist



I have tried changing the code to my own understanding by deleting the stored procedure code (function) from the pure code



-- Create shopping_cart_add_product stored procedure

CREATE PROCEDURE shopping_cart_add_product(IN inCartId CHAR(32),

IN inProductId INT, IN inAttributes VARCHAR(1000))

BEGIN

    DECLARE productQuantity INT;

    -- Obtain current shopping cart quantity for the product

    SELECT quantity

    FROM shopping_cart

    WHERE cart_id = inCartId

    AND product_id = inProductId

    AND attributes = inAttributes

    INTO productQuantity;



    IF productQuantity IS NULL THEN

        INSERT INTO shopping_cart(cart_id, product_id, attributes,

        quantity, added_on)

        VALUES (inCartId, inProductId, inAttributes, 1, NOW());

    ELSE

        UPDATE shopping_cart

        SET quantity = quantity + 1, buy_now = true

        WHERE cart_id = inCartId

        AND product_id = inProductId

        AND attributes = inAttributes;

    END IF;

END$$


and this is the code I change it to



public function addProductToCart($cart_id, $product_id, $attributes){

        $addProduct = 'DECLARE productQuantity INT ';

        $addProduct .= 'SELECT  * FROM `shopping_cart` WHERE cart_id = 

' . $cart_id . ' AND product_id = ' . $product_id;

    $addProduct .= ' AND attributes = ' . $attributes . ' INTO 

productQuantity ';

        $addProduct .= 'IF productQuantity IS NULL THEN INSERT INTO 

`shopping_cart`(';

    $addProduct .= 'cart_id, product_id, attributes, quantity, added_on) VALUES (';

    $addProduct .= $cart_id . ', ' . $product_id . ', ' . $attributes . ', 1 , 1 , NOW()';

    $addProduct .= ' ELSE UPDATE `shopping_cart` SET quantity = quantity + 1, buy_now = true WHERE cart_id = ' . $cart_id;

    $addProduct .= ' AND product_id = ' . $product_id . ' AND attributes = ' . $attributes;



    $parameters = ['cart_id' => $cart_id, 'product_id' => $product_id, 'attributes' => $attributes];



    $query = $this->query($addProduct, $parameters);

    return $query;

}



private function query($sql, $parameters = ) {

    $query = $this->pdo->prepare($sql);

    $query->execute($parameters);

    return $query;

}


This code is written in PHP7



I expect it to insert or update the affected rows in the database table






php mysql sql




php mysql sql






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Jan 3 at 8:19









Nick

38.9k132443




38.9k132443










asked Jan 3 at 8:16









Gbenga OgunbuleGbenga Ogunbule

446




446








  • 2





    You completely miss the point of preparing a statement and binding the variables. You should start with the manual: php.net/manual/en/pdo.prepare.php. And you are running multiple sql statements in 1 query, which probably will not work, even when you separate the statements correctly with an ;.

    – jeroen
    Jan 3 at 8:24
















  • 2





    You completely miss the point of preparing a statement and binding the variables. You should start with the manual: php.net/manual/en/pdo.prepare.php. And you are running multiple sql statements in 1 query, which probably will not work, even when you separate the statements correctly with an ;.

    – jeroen
    Jan 3 at 8:24










2




2





You completely miss the point of preparing a statement and binding the variables. You should start with the manual: php.net/manual/en/pdo.prepare.php. And you are running multiple sql statements in 1 query, which probably will not work, even when you separate the statements correctly with an ;.

– jeroen
Jan 3 at 8:24







You completely miss the point of preparing a statement and binding the variables. You should start with the manual: php.net/manual/en/pdo.prepare.php. And you are running multiple sql statements in 1 query, which probably will not work, even when you separate the statements correctly with an ;.

– jeroen
Jan 3 at 8:24














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