diff options
Diffstat (limited to 'activerecord/test/cases/adapters/postgresql/optimizer_hints_test.rb')
-rw-r--r-- | activerecord/test/cases/adapters/postgresql/optimizer_hints_test.rb | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapters/postgresql/optimizer_hints_test.rb b/activerecord/test/cases/adapters/postgresql/optimizer_hints_test.rb new file mode 100644 index 0000000000..5e4bf232e1 --- /dev/null +++ b/activerecord/test/cases/adapters/postgresql/optimizer_hints_test.rb @@ -0,0 +1,44 @@ +# frozen_string_literal: true + +require "cases/helper" +require "models/post" + +if supports_optimizer_hints? + class PostgresqlOptimzerHintsTest < ActiveRecord::PostgreSQLTestCase + fixtures :posts + + def setup + enable_extension!("pg_hint_plan", ActiveRecord::Base.connection) + end + + def test_optimizer_hints + assert_sql(%r{\ASELECT /\*\+ SeqScan\(posts\) \*/}) do + posts = Post.optimizer_hints("SeqScan(posts)") + posts = posts.select(:id).where(author_id: [0, 1]) + assert_includes posts.explain, "Seq Scan on posts" + end + end + + def test_optimizer_hints_is_sanitized + assert_sql(%r{\ASELECT /\*\+ SeqScan\(posts\) \*/}) do + posts = Post.optimizer_hints("/*+ SeqScan(posts) */") + posts = posts.select(:id).where(author_id: [0, 1]) + assert_includes posts.explain, "Seq Scan on posts" + end + + assert_sql(%r{\ASELECT /\*\+ "posts"\.\*, \*/}) do + posts = Post.optimizer_hints("**// \"posts\".*, //**") + posts = posts.select(:id).where(author_id: [0, 1]) + assert_equal({ "id" => 1 }, posts.first.as_json) + end + end + + def test_optimizer_hints_with_unscope + assert_sql(%r{\ASELECT "posts"\."id"}) do + posts = Post.optimizer_hints("/*+ SeqScan(posts) */") + posts = posts.select(:id).where(author_id: [0, 1]) + posts.unscope(:optimizer_hints).load + end + end + end +end |