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# frozen_string_literal: true
class UpdateStartDateForIterationsCadences < Gitlab::Database::Migration[2.0]
include ::Gitlab::Database::DynamicModelHelpers
restrict_gitlab_migration gitlab_schema: :gitlab_main
disable_ddl_transaction!
def up
each_batch_range('iterations_cadences', connection: connection) do |min, max|
execute(<<~SQL)
UPDATE iterations_cadences
SET start_date=ic.first_upcoming_iteration_start_date
FROM (
SELECT ic.id, sprints2.first_upcoming_iteration_start_date
FROM iterations_cadences as ic,
LATERAL (
-- For each cadence, query for the due date of its current iteration
SELECT due_date as current_iteration_due_date FROM sprints
WHERE iterations_cadence_id=ic.id AND start_date <= current_date AND due_date >= current_date
LIMIT 1
) as sprints1,
LATERAL (
-- For each cadence, query for the start date of the first upcoming iteration (i.e, it starts after the current iteration)
SELECT start_date as first_upcoming_iteration_start_date FROM sprints
WHERE iterations_cadence_id=ic.id AND start_date > sprints1.current_iteration_due_date
ORDER BY start_date ASC LIMIT 1
) as sprints2
WHERE ic.automatic=true AND ic.id BETWEEN #{min} AND #{max}
) as ic
WHERE iterations_cadences.id=ic.id;
SQL
end
end
def down
each_batch_range('iterations_cadences', connection: connection) do |min, max|
execute(<<~SQL)
UPDATE iterations_cadences
SET start_date=ic.first_iteration_start_date
FROM (
SELECT ic.id, sprints.start_date as first_iteration_start_date
FROM iterations_cadences as ic,
LATERAL (
SELECT start_date FROM sprints WHERE iterations_cadence_id=ic.id ORDER BY start_date ASC LIMIT 1
) as sprints
WHERE ic.automatic=true AND ic.id BETWEEN #{min} AND #{max}
) as ic
WHERE iterations_cadences.id=ic.id;
SQL
end
end
end
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