39 lines
1.2 KiB
Ruby
39 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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class MigrateSnippetNotesMentionsToDb < ActiveRecord::Migration[5.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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DELAY = 2.minutes.to_i
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BATCH_SIZE = 10_000
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MIGRATION = 'UserMentions::CreateResourceUserMention'
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INDEX_CONDITION = "note LIKE '%@%'::text AND notes.noteable_type = 'Snippet'"
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QUERY_CONDITIONS = "#{INDEX_CONDITION} AND snippet_user_mentions.snippet_id IS NULL"
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JOIN = 'INNER JOIN snippets ON snippets.id = notes.noteable_id LEFT JOIN snippet_user_mentions ON notes.id = snippet_user_mentions.note_id'
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disable_ddl_transaction!
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class Note < ActiveRecord::Base
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include EachBatch
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self.table_name = 'notes'
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end
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def up
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Note
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.joins(JOIN)
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.where(QUERY_CONDITIONS)
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.each_batch(of: BATCH_SIZE) do |batch, index|
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range = batch.pluck(Arel.sql('MIN(notes.id)'), Arel.sql('MAX(notes.id)')).first
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migrate_in(index * DELAY, MIGRATION, ['Snippet', JOIN, QUERY_CONDITIONS, true, *range])
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end
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end
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def down
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# no-op
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# temporary index is to be dropped in a different migration in an upcoming release:
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# https://gitlab.com/gitlab-org/gitlab/issues/196842
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end
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end
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