haseebeqx

module ActiveRecord
  class Relation
    def pluck_in_batches(*columns, batch_size: 1000, start: nil)
      relation = self
      relation = relation.where(table[primary_key].gteq(start)) if start
      batch_order = "#{table.name}.#{primary_key} ASC"
      relation = relation.reorder(batch_order)

      loop do
        batch = relation.limit(batch_size).pluck(*columns, primary_key)

haseebeqx

SELECT
  i.relname AS index_name,
  t.relname AS table_name,
  s.idx_scan AS times_used,
  pg_size_pretty(pg_relation_size(i.oid)) AS index_size         
FROM
  pg_stat_user_indexes s
JOIN
  pg_index ix
ON

haseebeqx

# from gitlab/spec/support/matchers/exceed_query_limit.rb
RSpec::Matchers.define :exceed_query_limit do |expected|
  supports_block_expectations

  match do |block|
    @subject_block = block
    actual_count > expected_count + threshold
  end

  failure_message_when_negated do |actual|