[英]MySQL Syntax Error when using JSON array as value
My Table:我的表:
Expected values预期值
The following SQL works as expected.以下 SQL 按预期工作。 Great!
伟大的!
-- Insert a new row into the purchased products table
INSERT INTO dc_purchased_products (
user_id, -- INT
purchased_products -- JSON
)
-- 1) The user ID (primary key)
-- 2) Formatted json array with the first purchased product ID
VALUES ( 12345, '["36"]' )
-- If the user id already exists, append the existing array with the product ID
ON DUPLICATE KEY UPDATE
-- JSON_ARRAY_INSERT(existing purchases array, index, product_id)
purchased_products = JSON_ARRAY_INSERT(purchased_products, '$[0]', "36")
However, my PDO satements in my application arent so good.但是,我的应用程序中的 PDO 语句并不是那么好。
$item = [
'statement' => "INSERT INTO purchased_products
(customer_id, purchased_products)
VALUES(:customer_id, [:purchased_products])
ON DUPLICATE KEY
UPDATE purchased_products = JSON_ARRAY_INSERT(purchased_products, '$[0]',:purchased_products)",
'data' => [
['customer_id' => 12345, 'purchased_products' => '"36"'],
['customer_id' => 12345, 'purchased_products' => '"37"']
]
]
My Connection我的连接
$this->connection = new PDO("mysql:host=$servername;dbname=$database", $u, $p, [
PDO::MYSQL_ATTR_SSL_KEY => $ck,
PDO::MYSQL_ATTR_SSL_CERT => $cc,
PDO::MYSQL_ATTR_SSL_CA => $sc,
PDO::MYSQL_ATTR_SSL_VERIFY_SERVER_CERT => false,
]);
$this->connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$statement = $this->connection->prepare($item['statement']);
foreach ($item['data'] as $rowData) {
foreach ($rowData as $key => $param) {
$statement->bindValue(':' . $key, $param);
}
try {
$success = $statement->execute();
}
catch (PDOException $e) {
pre($e->getMessage());
}
}
Error message错误信息
SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax;
SQLSTATE[42000]:语法错误或访问冲突:1064 您的 SQL 语法有错误; check the manual that corresponds to your MySQL server version for the right syntax to use near '['3784835']) ON DUPLICATE KEY UPDATE purchased_products = JSON_ARRAY_INSERT(purc' at line 1
检查与您的 MySQL 服务器版本相对应的手册,了解在 '['3784835']) 附近使用的正确语法 ON DUPLICATE KEY UPDATE purchase_products = JSON_ARRAY_INSERT(purc' 在第 1 行
This should fix the problem:这应该可以解决问题:
$item = [
'statement' => "INSERT INTO purchased_products
(customer_id, purchased_products)
VALUES(:customer_id, :purchased_products)
ON DUPLICATE KEY
UPDATE purchased_products = JSON_ARRAY_INSERT(purchased_products, '$[0]',:purchased_products_json)",
'data' => [
['customer_id' => 12345, 'purchased_products' => '["36"]', 'purchased_products_json' => '36'],
['customer_id' => 12345, 'purchased_products' => '["37"]', 'purchased_products_json' => '37'],
]
];
Removed [
and ]
in VALUES(:customer_id, [:purchased_products])
[
]
VALUES(:customer_id, [:purchased_products])
中的 [ 和 ]
Now it looks like this:现在看起来像这样:
VALUES(:customer_id, :purchased_products)
This change will avoid the error during the execute()
.此更改将避免
execute()
期间的错误。
New param in JSON_ARRAY_INSERT: purchased_products_json JSON_ARRAY_INSERT 中的新参数:购买的_products_json
Now it looks like this:现在看起来像这样:
JSON_ARRAY_INSERT(purchased_products, '$[0]',:purchased_products_json)
To avoid the error now we need two params with small diferences.为了避免错误,现在我们需要两个差异很小的参数。 One for the INSERT (
purchased_products
) and other for the UPDATE ( purchased_produtcs_json
) because they have different formats despite same values.一个用于插入(
purchased_products
的产品)和另一个用于更新( purchased_produtcs_json
的产品json),因为尽管值相同,但它们具有不同的格式。
In data
array, changed 'purchased_products' => '"36"'
在
data
数组中,更改了'purchased_products' => '"36"'
Now it looks like this:现在看起来像这样:
'purchased_products' => '["36"]'
because we will use it during INSERT stament, and we need to set it as new JSON array value with correct format and because we already removed the [
and ]
in the previous INSERT statement.因为我们将在 INSERT 语句中使用它,我们需要将其设置为新的 JSON 数组值,格式正确,因为我们已经删除了前面 INSERT 语句中的
[
和]
。
In data
array, added new param: 'purchased_products_json'
在
data
数组中,添加了新参数: 'purchased_products_json'
In order to UPDATE the field, the value format should be different, so we need this new param.为了更新字段,值格式应该不同,所以我们需要这个新参数。 It looks like this:
它看起来像这样:
'purchased_products_json' => '36'
avoiding the use of [
and ]
.避免使用
[
和]
。 You can see some information about JSON_ARRAY_INSERT in mariadb documentation您可以在mariadb 文档中看到有关 JSON_ARRAY_INSERT 的一些信息
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