73 lines
2.2 KiB
Ruby
73 lines
2.2 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'spec_helper'
|
|
|
|
RSpec.describe Gitlab::SQL::RecursiveCTE do
|
|
let(:cte) { described_class.new(:cte_name) }
|
|
|
|
describe '#to_arel' do
|
|
it 'generates an Arel relation for the CTE body' do
|
|
rel1 = User.where(id: 1)
|
|
rel2 = User.where(id: 2)
|
|
|
|
cte << rel1
|
|
cte << rel2
|
|
|
|
sql = cte.to_arel.to_sql
|
|
name = ApplicationRecord.connection.quote_table_name(:cte_name)
|
|
|
|
sql1, sql2 = ApplicationRecord.connection.unprepared_statement do
|
|
[rel1.except(:order).to_sql, rel2.except(:order).to_sql]
|
|
end
|
|
|
|
expect(sql).to eq("#{name} AS ((#{sql1})\nUNION\n(#{sql2}))")
|
|
end
|
|
end
|
|
|
|
describe '#alias_to' do
|
|
it 'returns an alias for the CTE' do
|
|
table = Arel::Table.new(:kittens)
|
|
|
|
source_name = ApplicationRecord.connection.quote_table_name(:cte_name)
|
|
alias_name = ApplicationRecord.connection.quote_table_name(:kittens)
|
|
|
|
expect(cte.alias_to(table).to_sql).to eq("#{source_name} AS #{alias_name}")
|
|
end
|
|
|
|
it 'replaces dots with an underscore' do
|
|
table = Arel::Table.new('gitlab.kittens')
|
|
|
|
source_name = ApplicationRecord.connection.quote_table_name(:cte_name)
|
|
alias_name = ApplicationRecord.connection.quote_table_name(:gitlab_kittens)
|
|
|
|
expect(cte.alias_to(table).to_sql).to eq("#{source_name} AS #{alias_name}")
|
|
end
|
|
end
|
|
|
|
describe '#apply_to' do
|
|
it 'applies a CTE to an ActiveRecord::Relation' do
|
|
user = create(:user)
|
|
cte = described_class.new(:cte_name)
|
|
|
|
cte << User.where(id: user.id)
|
|
|
|
relation = cte.apply_to(User.all)
|
|
|
|
expect(relation.to_sql).to match(/WITH RECURSIVE.+cte_name/)
|
|
expect(relation.to_a).to eq(User.where(id: user.id).to_a)
|
|
end
|
|
end
|
|
|
|
it_behaves_like 'CTE with MATERIALIZED keyword examples' do
|
|
# MATERIALIZED keyword is not needed for recursive queries
|
|
let(:expected_query_block_with_materialized) { 'WITH RECURSIVE "some_cte" AS (' }
|
|
let(:expected_query_block_without_materialized) { 'WITH RECURSIVE "some_cte" AS (' }
|
|
|
|
let(:query) do
|
|
recursive_cte = described_class.new(:some_cte)
|
|
recursive_cte << User.active
|
|
|
|
User.with.recursive(recursive_cte.to_arel).to_sql
|
|
end
|
|
end
|
|
end
|