47 lines
1.7 KiB
Ruby
47 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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# rubocop:disable Metrics/AbcSize
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# rubocop:disable Style/Documentation
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module Gitlab
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module BackgroundMigration
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class DeleteDiffFiles
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def perform(merge_request_diff_id)
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merge_request_diff = MergeRequestDiff.find_by(id: merge_request_diff_id)
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return unless merge_request_diff
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return unless should_delete_diff_files?(merge_request_diff)
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MergeRequestDiff.transaction do
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merge_request_diff.update_column(:state, 'without_files')
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# explain (analyze, buffers) when deleting 453 diff files:
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#
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# Delete on merge_request_diff_files (cost=0.57..8487.35 rows=4846 width=6) (actual time=43.265..43.265 rows=0 loops=1)
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# Buffers: shared hit=2043 read=259 dirtied=254
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# -> Index Scan using index_merge_request_diff_files_on_mr_diff_id_and_order on merge_request_diff_files (cost=0.57..8487.35 rows=4846 width=6) (actu
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# al time=0.466..26.317 rows=453 loops=1)
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# Index Cond: (merge_request_diff_id = 463448)
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# Buffers: shared hit=17 read=84
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# Planning time: 0.107 ms
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# Execution time: 43.287 ms
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#
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MergeRequestDiffFile.where(merge_request_diff_id: merge_request_diff.id).delete_all
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end
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end
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private
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def should_delete_diff_files?(merge_request_diff)
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return false if merge_request_diff.state == 'without_files'
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merge_request = merge_request_diff.merge_request
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return false unless merge_request.state == 'merged'
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return false if merge_request_diff.id == merge_request.latest_merge_request_diff_id
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true
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end
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end
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end
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end
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