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# frozen_string_literal: true
require 'spec_helper'
describe Gitlab::Database::PartitioningMigrationHelpers::TableManagementHelpers do
include PartitioningHelpers
include TriggerHelpers
let(:migration) do
ActiveRecord::Migration.new.extend(described_class)
end
let_it_be(:connection) { ActiveRecord::Base.connection }
let(:template_table) { :audit_events }
let(:partitioned_table) { '_test_migration_partitioned_table' }
let(:function_name) { '_test_migration_function_name' }
let(:trigger_name) { '_test_migration_trigger_name' }
let(:partition_column) { 'created_at' }
let(:min_date) { Date.new(2019, 12) }
let(:max_date) { Date.new(2020, 3) }
before do
allow(migration).to receive(:puts)
allow(migration).to receive(:transaction_open?).and_return(false)
allow(migration).to receive(:partitioned_table_name).and_return(partitioned_table)
allow(migration).to receive(:sync_function_name).and_return(function_name)
allow(migration).to receive(:sync_trigger_name).and_return(trigger_name)
allow(migration).to receive(:assert_table_is_whitelisted)
end
describe '#partition_table_by_date' do
let(:partition_column) { 'created_at' }
let(:old_primary_key) { 'id' }
let(:new_primary_key) { [old_primary_key, partition_column] }
context 'when the table is not whitelisted' do
let(:template_table) { :this_table_is_not_whitelisted }
it 'raises an error' do
expect(migration).to receive(:assert_table_is_whitelisted).with(template_table).and_call_original
expect do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
end.to raise_error(/#{template_table} is not whitelisted for use/)
end
end
context 'when run inside a transaction block' do
it 'raises an error' do
expect(migration).to receive(:transaction_open?).and_return(true)
expect do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
end.to raise_error(/can not be run inside a transaction/)
end
end
context 'when the the max_date is less than the min_date' do
let(:max_date) { Time.utc(2019, 6) }
it 'raises an error' do
expect do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
end.to raise_error(/max_date #{max_date} must be greater than min_date #{min_date}/)
end
end
context 'when the max_date is equal to the min_date' do
let(:max_date) { min_date }
it 'raises an error' do
expect do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
end.to raise_error(/max_date #{max_date} must be greater than min_date #{min_date}/)
end
end
context 'when the given table does not have a primary key' do
let(:template_table) { :_partitioning_migration_helper_test_table }
let(:partition_column) { :some_field }
it 'raises an error' do
migration.create_table template_table, id: false do |t|
t.integer :id
t.datetime partition_column
end
expect do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
end.to raise_error(/primary key not defined for #{template_table}/)
end
end
context 'when an invalid partition column is given' do
let(:partition_column) { :_this_is_not_real }
it 'raises an error' do
expect do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
end.to raise_error(/partition column #{partition_column} does not exist/)
end
end
describe 'constructing the partitioned table' do
it 'creates a table partitioned by the proper column' do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
expect(connection.table_exists?(partitioned_table)).to be(true)
expect(connection.primary_key(partitioned_table)).to eq(new_primary_key)
expect_table_partitioned_by(partitioned_table, [partition_column])
end
it 'changes the primary key datatype to bigint' do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
pk_column = connection.columns(partitioned_table).find { |c| c.name == old_primary_key }
expect(pk_column.sql_type).to eq('bigint')
end
context 'with a non-integer primary key datatype' do
before do
connection.create_table :another_example, id: false do |t|
t.string :identifier, primary_key: true
t.timestamp :created_at
end
end
let(:template_table) { :another_example }
let(:old_primary_key) { 'identifier' }
it 'does not change the primary key datatype' do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
original_pk_column = connection.columns(template_table).find { |c| c.name == old_primary_key }
pk_column = connection.columns(partitioned_table).find { |c| c.name == old_primary_key }
expect(pk_column).not_to be_nil
expect(pk_column).to eq(original_pk_column)
end
end
it 'removes the default from the primary key column' do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
pk_column = connection.columns(partitioned_table).find { |c| c.name == old_primary_key }
expect(pk_column.default_function).to be_nil
end
it 'creates the partitioned table with the same non-key columns' do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
copied_columns = filter_columns_by_name(connection.columns(partitioned_table), new_primary_key)
original_columns = filter_columns_by_name(connection.columns(template_table), new_primary_key)
expect(copied_columns).to match_array(original_columns)
end
it 'creates a partition spanning over each month in the range given' do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
expect_range_partition_of("#{partitioned_table}_000000", partitioned_table, 'MINVALUE', "'2019-12-01 00:00:00'")
expect_range_partition_of("#{partitioned_table}_201912", partitioned_table, "'2019-12-01 00:00:00'", "'2020-01-01 00:00:00'")
expect_range_partition_of("#{partitioned_table}_202001", partitioned_table, "'2020-01-01 00:00:00'", "'2020-02-01 00:00:00'")
expect_range_partition_of("#{partitioned_table}_202002", partitioned_table, "'2020-02-01 00:00:00'", "'2020-03-01 00:00:00'")
end
end
describe 'keeping data in sync with the partitioned table' do
let(:template_table) { :todos }
let(:model) { Class.new(ActiveRecord::Base) }
let(:timestamp) { Time.utc(2019, 12, 1, 12).round }
before do
model.primary_key = :id
model.table_name = partitioned_table
end
it 'creates a trigger function on the original table' do
expect_function_not_to_exist(function_name)
expect_trigger_not_to_exist(template_table, trigger_name)
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
expect_function_to_exist(function_name)
expect_valid_function_trigger(template_table, trigger_name, function_name, after: %w[delete insert update])
end
it 'syncs inserts to the partitioned tables' do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
expect(model.count).to eq(0)
first_todo = create(:todo, created_at: timestamp, updated_at: timestamp)
second_todo = create(:todo, created_at: timestamp, updated_at: timestamp)
expect(model.count).to eq(2)
expect(model.find(first_todo.id).attributes).to eq(first_todo.attributes)
expect(model.find(second_todo.id).attributes).to eq(second_todo.attributes)
end
it 'syncs updates to the partitioned tables' do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
first_todo = create(:todo, :pending, commit_id: nil, created_at: timestamp, updated_at: timestamp)
second_todo = create(:todo, created_at: timestamp, updated_at: timestamp)
expect(model.count).to eq(2)
first_copy = model.find(first_todo.id)
second_copy = model.find(second_todo.id)
expect(first_copy.attributes).to eq(first_todo.attributes)
expect(second_copy.attributes).to eq(second_todo.attributes)
first_todo.update(state_event: 'done', commit_id: 'abc123', updated_at: timestamp + 1.second)
expect(model.count).to eq(2)
expect(first_copy.reload.attributes).to eq(first_todo.attributes)
expect(second_copy.reload.attributes).to eq(second_todo.attributes)
end
it 'syncs deletes to the partitioned tables' do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
first_todo = create(:todo, created_at: timestamp, updated_at: timestamp)
second_todo = create(:todo, created_at: timestamp, updated_at: timestamp)
expect(model.count).to eq(2)
first_todo.destroy
expect(model.count).to eq(1)
expect(model.find_by_id(first_todo.id)).to be_nil
expect(model.find(second_todo.id).attributes).to eq(second_todo.attributes)
end
end
end
describe '#drop_partitioned_table_for' do
let(:expected_tables) do
%w[000000 201912 202001 202002].map { |suffix| "#{partitioned_table}_#{suffix}" }.unshift(partitioned_table)
end
context 'when the table is not whitelisted' do
let(:template_table) { :this_table_is_not_whitelisted }
it 'raises an error' do
expect(migration).to receive(:assert_table_is_whitelisted).with(template_table).and_call_original
expect do
migration.drop_partitioned_table_for template_table
end.to raise_error(/#{template_table} is not whitelisted for use/)
end
end
it 'drops the trigger syncing to the partitioned table' do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
expect_function_to_exist(function_name)
expect_valid_function_trigger(template_table, trigger_name, function_name, after: %w[delete insert update])
migration.drop_partitioned_table_for template_table
expect_function_not_to_exist(function_name)
expect_trigger_not_to_exist(template_table, trigger_name)
end
it 'drops the partitioned copy and all partitions' do
migration.partition_table_by_date template_table, partition_column, min_date: min_date, max_date: max_date
expected_tables.each do |table|
expect(connection.table_exists?(table)).to be(true)
end
migration.drop_partitioned_table_for template_table
expected_tables.each do |table|
expect(connection.table_exists?(table)).to be(false)
end
end
end
def filter_columns_by_name(columns, names)
columns.reject { |c| names.include?(c.name) }
end
end
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