How do I use expression with bulk insert using npm mysql? - mysql

Question

This question answers 99% of what I am looking for...
How do I do a bulk insert in mySQL using node.js
var sql = "INSERT INTO Test (name, email, n) VALUES ?";
var values = [
['demian', 'demian#gmail.com', 1],
['john', 'john#gmail.com', 2],
['mark', 'mark#gmail.com', 3],
['pete', 'pete#gmail.com', 4]
];
conn.query(sql, [values], function(err) {
if (err) throw err;
conn.end();
});
If I want to pass an expression, such as NOW(), how would I do that? If I pass it in the array, it would count as a string. Since VALUES is a ? that gets populated by the array, I can't easily inject an expression. Any ideas?

Answer 1

Basically it seems impossible, so you should make a query string you want.
I would try this as follows.
var sql = "INSERT INTO Test (name, email, n, modified_on) VALUES ?";
var values = [
['demian', 'demian#gmail.com', 1, '::NOW()'],
['john', 'john#gmail.com', 2, '::UNIX_TIMESTAMP()'],
['mark', 'mark#gmail.com', 3, '::DATE()'],
['pete', 'pete#gmail.com', 4, '::NOW()']
];
var formattedQuery = connection.format(sql, [values]).replace(/'::(.*?)'/g, '$1');
connection.query(formattedQuery, function(err) {
});
fomattedQuery is as follows.
INSERT INTO Test (name, email, n, modified_on) VALUES ('demian', 'demian#gmail.com', 1, NOW()), ('john', 'john#gmail.com', 2, UNIX_TIMESTAMP()), ('mark', 'mark#gmail.com', 3, DATE()), ('pete', 'pete#gmail.com', 4, NOW())
I hope this helps.