diff options
Diffstat (limited to 'spec/lib/gitlab/database/partitioning/replace_table_spec.rb')
-rw-r--r-- | spec/lib/gitlab/database/partitioning/replace_table_spec.rb | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/spec/lib/gitlab/database/partitioning/replace_table_spec.rb b/spec/lib/gitlab/database/partitioning/replace_table_spec.rb new file mode 100644 index 00000000000..8800ff845ae --- /dev/null +++ b/spec/lib/gitlab/database/partitioning/replace_table_spec.rb @@ -0,0 +1,71 @@ +# frozen_string_literal: true + +require 'spec_helper' + +RSpec.describe Gitlab::Database::Partitioning::ReplaceTable, '#perform' do + include TableSchemaHelpers + + subject(:replace_table) { described_class.new(original_table, replacement_table, archived_table, 'id').perform } + + let(:original_table) { '_test_original_table' } + let(:replacement_table) { '_test_replacement_table' } + let(:archived_table) { '_test_archived_table' } + + let(:original_sequence) { "#{original_table}_id_seq" } + + let(:original_primary_key) { "#{original_table}_pkey" } + let(:replacement_primary_key) { "#{replacement_table}_pkey" } + let(:archived_primary_key) { "#{archived_table}_pkey" } + + before do + connection.execute(<<~SQL) + CREATE TABLE #{original_table} ( + id serial NOT NULL PRIMARY KEY, + original_column text NOT NULL, + created_at timestamptz NOT NULL); + + CREATE TABLE #{replacement_table} ( + id int NOT NULL, + replacement_column text NOT NULL, + created_at timestamptz NOT NULL, + PRIMARY KEY (id, created_at)) + PARTITION BY RANGE (created_at); + + CREATE TABLE #{replacement_table}_202001 PARTITION OF #{replacement_table} + FOR VALUES FROM ('2020-01-01') TO ('2020-02-01'); + SQL + end + + it 'replaces the current table, archiving the old' do + expect_table_to_be_replaced { replace_table } + end + + it 'transfers the primary key sequence to the replacement table' do + expect(sequence_owned_by(original_table, 'id')).to eq(original_sequence) + expect(default_expression_for(original_table, 'id')).to eq("nextval('#{original_sequence}'::regclass)") + + expect(sequence_owned_by(replacement_table, 'id')).to be_nil + expect(default_expression_for(replacement_table, 'id')).to be_nil + + expect_table_to_be_replaced { replace_table } + + expect(sequence_owned_by(original_table, 'id')).to eq(original_sequence) + expect(default_expression_for(original_table, 'id')).to eq("nextval('#{original_sequence}'::regclass)") + expect(sequence_owned_by(archived_table, 'id')).to be_nil + expect(default_expression_for(archived_table, 'id')).to be_nil + end + + it 'renames the primary key constraints to match the new table names' do + expect(primary_key_constraint_name(original_table)).to eq(original_primary_key) + expect(primary_key_constraint_name(replacement_table)).to eq(replacement_primary_key) + + expect_table_to_be_replaced { replace_table } + + expect(primary_key_constraint_name(original_table)).to eq(original_primary_key) + expect(primary_key_constraint_name(archived_table)).to eq(archived_primary_key) + end + + def expect_table_to_be_replaced(&block) + super(original_table: original_table, replacement_table: replacement_table, archived_table: archived_table, &block) + end +end |