无法在节点js中使用util.format（）在mysql准备的语句中解析整数

Question

I am using util module in node.js for formatting strings. But I found a catch when I wanna run an SQL Query like -

select * from something LIMIT 5 OFFSET 0;

So what I am trying to do is, I've created a queryString then format that queryString and finally execute the query through server application. Here is the code in nodejs :

queryString = "select * from something LIMIT '%d' OFFSET '%d'";
query = util.format(queryString, 5, 0);
res = db.executeQuery(query);

I have also tried %i and %s, with quotes and without quotes but nothing worked for me. Here is the log :

Error: ER_PARSE_ERROR: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%i OFFSET %i' at line 1

I am sure I am missing something here. Thanks in advance

Answer 1

Assuming you are using mysql module

There are other ways:

var limit = 5;
var offset = 0;
var qs = `select * from something LIMIT ${limit} OFFSET ${offset}`;

or

connection.query('select * from something LIMIT ? OFFSET ?', [limit, offset], function (error, results, fields) {
  ...
});

or

var sql = mysql.format('select * from something LIMIT ? OFFSET ?', [limit, offset]);

See docs