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class AddForeignKeyToCiVariables < ActiveRecord::Migration[4.2]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
def up
execute <<~SQL
DELETE FROM ci_variables
WHERE NOT EXISTS (
SELECT true
FROM projects
WHERE projects.id = ci_variables.project_id
)
SQL
add_concurrent_foreign_key(:ci_variables, :projects, column: :project_id)
end
def down
remove_foreign_key(:ci_variables, column: :project_id)
end
end
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