59 lines
2.2 KiB
Ruby
59 lines
2.2 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Database
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module Partitioning
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class DetachedPartitionDropper
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def perform
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return unless Feature.enabled?(:drop_detached_partitions, default_enabled: :yaml)
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Gitlab::AppLogger.info(message: "Checking for previously detached partitions to drop")
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Postgresql::DetachedPartition.ready_to_drop.find_each do |detached_partition|
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connection.transaction do
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# Another process may have already dropped the table and deleted this entry
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next unless (detached_partition = Postgresql::DetachedPartition.lock.find_by(id: detached_partition.id))
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drop_detached_partition(detached_partition.table_name)
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detached_partition.destroy!
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end
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rescue StandardError => e
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Gitlab::AppLogger.error(message: "Failed to drop previously detached partition",
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partition_name: detached_partition.table_name,
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exception_class: e.class,
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exception_message: e.message)
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end
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end
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private
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def drop_detached_partition(partition_name)
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partition_identifier = qualify_partition_name(partition_name)
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if partition_detached?(partition_identifier)
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connection.drop_table(partition_identifier, if_exists: true)
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Gitlab::AppLogger.info(message: "Dropped previously detached partition", partition_name: partition_name)
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else
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Gitlab::AppLogger.error(message: "Attempt to drop attached database partition", partition_name: partition_name)
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end
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end
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def qualify_partition_name(table_name)
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"#{Gitlab::Database::DYNAMIC_PARTITIONS_SCHEMA}.#{table_name}"
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end
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def partition_detached?(partition_identifier)
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# PostgresPartition checks the pg_inherits view, so our partition will only show here if it's still attached
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# and thus should not be dropped
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!Gitlab::Database::PostgresPartition.for_identifier(partition_identifier).exists?
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end
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def connection
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Postgresql::DetachedPartition.connection
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end
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end
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end
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end
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end
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