34 lines
940 B
Ruby
34 lines
940 B
Ruby
# See http://doc.gitlab.com/ce/development/migration_style_guide.html
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# for more information on how to write migrations for GitLab.
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class AddCompositeIndexOnMergeRequestsMergeCommitSha < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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# Set this constant to true if this migration requires downtime.
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DOWNTIME = false
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# The default index name is too long for PostgreSQL and would thus be
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# truncated.
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INDEX_NAME = 'index_merge_requests_on_tp_id_and_merge_commit_sha_and_id'
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COLUMNS = [:target_project_id, :merge_commit_sha, :id]
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disable_ddl_transaction!
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def up
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return if index_is_present?
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add_concurrent_index(:merge_requests, COLUMNS, name: INDEX_NAME)
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end
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def down
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return unless index_is_present?
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remove_concurrent_index(:merge_requests, COLUMNS, name: INDEX_NAME)
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end
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def index_is_present?
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index_exists?(:merge_requests, COLUMNS, name: INDEX_NAME)
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end
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end
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