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# frozen_string_literal: true
class PrepareAuditEventsGroupIndex < Gitlab::Database::Migration[2.1]
include Gitlab::Database::PartitioningMigrationHelpers
TABLE_NAME = :audit_events
COLUMN_NAMES = [:entity_id, :entity_type, :created_at, :id]
INDEX_NAME = 'index_audit_events_on_entity_id_and_entity_type_and_created_at'
disable_ddl_transaction!
def up
# Since audit_events is a partitioned table, we need to prepare the index
# for each partition individually. We can't use the `prepare_async_index`
# method directly because it will try to prepare the index for the whole
# table, which will fail.
# In a future migration after this one, we will create the index on the
# parent table itself.
# TODO: Issue for future migration https://gitlab.com/gitlab-org/gitlab/-/issues/411129
each_partition(TABLE_NAME) do |partition, partition_index_name|
prepare_async_index(
partition.identifier,
COLUMN_NAMES,
name: partition_index_name
)
end
end
def down
each_partition(TABLE_NAME) 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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