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class CleanupStagesPositionMigration < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
TMP_INDEX_NAME = 'tmp_id_stage_position_partial_null_index'.freeze
disable_ddl_transaction!
class Stages < ActiveRecord::Base
include EachBatch
self.table_name = 'ci_stages'
end
def up
disable_statement_timeout do
Gitlab::BackgroundMigration.steal('MigrateStageIndex')
unless index_exists_by_name?(:ci_stages, TMP_INDEX_NAME)
add_concurrent_index(:ci_stages, :id, where: 'position IS NULL', name: TMP_INDEX_NAME)
end
migratable = <<~SQL
position IS NULL AND EXISTS (
SELECT 1 FROM ci_builds WHERE stage_id = ci_stages.id AND stage_idx IS NOT NULL
)
SQL
Stages.where(migratable).each_batch(of: 1000) do |batch|
batch.pluck(:id).each do |stage|
Gitlab::BackgroundMigration::MigrateStageIndex.new.perform(stage, stage)
end
end
remove_concurrent_index_by_name(:ci_stages, TMP_INDEX_NAME)
end
end
def down
if index_exists_by_name?(:ci_stages, TMP_INDEX_NAME)
disable_statement_timeout do
remove_concurrent_index_by_name(:ci_stages, TMP_INDEX_NAME)
end
end
end
end
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