heroku-pg-extras/commands/seq_scans.js

'use strict'

const co = require('co')
const cli = require('heroku-cli-util')
const pg = require('heroku-pg')

function * run (context, heroku) {
  let db = yield pg.fetcher(heroku).database(context.app, context.args.database)

  let query = `
SELECT relname AS name,
       seq_scan as count
FROM
  pg_stat_user_tables
ORDER BY seq_scan DESC;
`

  let output = yield pg.psql.exec(db, query)
  process.stdout.write(output)
}

const cmd = {
  topic: 'pg',
  description: 'show the count of sequential scans by table descending by order',
  needsApp: true,
  needsAuth: true,
  args: [{name: 'database', optional: true}],
  run: cli.command(co.wrap(run))
}

module.exports = [
  Object.assign({command: 'seq-scans'}, cmd),
  Object.assign({command: 'seq_scans', hidden: true}, cmd)
]