42 lines
1.2 KiB
Ruby
42 lines
1.2 KiB
Ruby
class AddIndexConstraintsToInternalIdTable < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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disable_ddl_transaction!
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def up
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add_concurrent_index :internal_ids, [:usage, :namespace_id], unique: true, where: 'namespace_id IS NOT NULL'
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replace_index(:internal_ids, [:usage, :project_id], name: 'index_internal_ids_on_usage_and_project_id') do
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add_concurrent_index :internal_ids, [:usage, :project_id], unique: true, where: 'project_id IS NOT NULL'
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end
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add_concurrent_foreign_key :internal_ids, :namespaces, column: :namespace_id, on_delete: :cascade
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end
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def down
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remove_concurrent_index :internal_ids, [:usage, :namespace_id]
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replace_index(:internal_ids, [:usage, :project_id], name: 'index_internal_ids_on_usage_and_project_id') do
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add_concurrent_index :internal_ids, [:usage, :project_id], unique: true
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end
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remove_foreign_key :internal_ids, column: :namespace_id
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end
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private
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def replace_index(table, columns, name:)
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temporary_name = "#{name}_old"
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if index_exists?(table, columns, name: name)
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rename_index table, name, temporary_name
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end
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yield
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remove_concurrent_index_by_name table, temporary_name
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end
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end
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