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# frozen_string_literal: true
class PrepareBuildsMetadataAsyncIdx < Gitlab::Database::Migration[2.1]
include Gitlab::Database::PartitioningMigrationHelpers
disable_ddl_transaction!
INDEX_NAME = 'p_ci_builds_metadata_on_runner_machine_id_idx'
def up
# Break up the logic from add_concurrent_partitioned_index so that the partition indices can be created async
# A follow-up migration will complete the index creation by creating the index on the metadata table, and
# creating the concurrent foreign key
each_partition(:p_ci_builds_metadata) do |partition, partition_index_name|
prepare_async_index(partition.identifier, :runner_machine_id,
name: partition_index_name, where: 'runner_machine_id IS NOT NULL')
end
end
def down
each_partition(:p_ci_builds_metadata) do |partition, partition_index_name|
unprepare_async_index_by_name(partition.identifier, partition_index_name)
end
end
private
def each_partition(table_name)
partitioned_table = find_partitioned_table(table_name)
partitioned_table.postgres_partitions.order(:name).each do |partition|
partition_index_name = generated_index_name(partition.identifier, INDEX_NAME)
yield partition, partition_index_name
end
end
end
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