[Help] How to use the IN operator with prepared statements?

Hello 👋

I’m having a doubt on the best way to use the following query via the prepared statements:

SELECT *
  FROM table
WHERE ID IN (id1, id2, ...) 

What I’m trying is:

const ids = ['01GG7E75ZBMSQQ6FPG5456ZHRP', '01GG7EY1XRJKF0KTA4GVZMST6A', '01GG7XHTVC5003RAVBENMC96CP']
const result = await this.db.query({
      name: 'get-by-ids',
      text: `SELECT * FROM table WHERE ID IN ($1)`,
      values: [ids],
})

But doesn’t return anything or an error. Any thoughts?

[rafaell-lycan]

Solved by changing IN to = ANY as proposed on the Wiki.

const ids = ['01GG7E75ZBMSQQ6FPG5456ZHRP', '01GG7EY1XRJKF0KTA4GVZMST6A', '01GG7XHTVC5003RAVBENMC96CP']
const result = await this.db.query({
      name: 'get-by-ids',
      text: `SELECT * FROM table WHERE ID = ANY ($1)`,
      values: [ids],
})

Side Note: Would be nice to have this kind of information on the website on a FAQ page as well.

cc @brianc

[sehrope]

For the NOT IN case you need to use: id != ALL($1) (“id is not equal to all of these values”)

SQL with id != ANY($1) would not work as if there’s more than one value in $1, then id will definitely not be equal to one of those values.

For example if $1 = [1,2,3, 4], then regardless of the value of “id”, it will always be != to at least one of those values as even if it matches one value, it definitely does not match the rest.

So in summary:

• If it’s =, then use ANY(...)
• If it’s !=, then use ALL(...)