using the presto-client-node docs aren't clear for me

Asked Jun 29 '22 at 13:00

Active Jun 29 '22 at 13:00

Viewed 15 times

I am trying to use the following package to connect to a presto db in Node.

This is what I have so far.

const presto = require('presto-client')

const client = new presto.Client({
  host: 'xxx-presto-da.xxx.com',
  port: 1234,
  catalog: 'gridhive',
  schema: 'rpt',
  source: 'nodejs-client',
  basic_auth: {user: 'xxx', password: 'xxx'},
})

const getPrestoData = () => {
  client.execute({
    query: `
      select some query
    `,
    data: function (error, data, columns, stats) {
      console.log('data:', data)
      return data
    },
    success: function (error, stats) {},
  })
}

console.log(getPrestoData())

But this is what's returned

13:56:15 in sellersjson-analysis/src/lib via ⬢ v18.3.0 
> node presto.js
undefined

I am not sure what is being undefined. I just want to know the best way to implement this. Am I doing it correctly?

asked Jun 29 '22 at 13:00

mrpbennett

1,527
15
40

`getPrestoData` does not `return` anything. You `return` something from the `data` callback only, but `execute` will ignore that – Bergi Jun 29 '22 at 13:30
so how do i do that? how do i return the data callback? – mrpbennett Jun 29 '22 at 13:37
See the duplicate: you don't. Either accept a callback or build a promise for it. – Bergi Jun 29 '22 at 13:40

using the presto-client-node docs aren't clear for me

0 Answers0