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# frozen_string_literal: true
class RebuildIndexForCadenceIterationsAutomation < ActiveRecord::Migration[6.0]
include Gitlab::Database::MigrationHelpers
INDEX_NAME = 'cadence_create_iterations_automation'
disable_ddl_transaction!
def up
return if index_exists_and_is_valid?
remove_concurrent_index_by_name :iterations_cadences, INDEX_NAME
disable_statement_timeout do
execute(
<<-SQL
CREATE INDEX CONCURRENTLY #{INDEX_NAME} ON iterations_cadences
USING BTREE(automatic, duration_in_weeks, (DATE ((COALESCE("iterations_cadences"."last_run_date", DATE('01-01-1970')) + "iterations_cadences"."duration_in_weeks" * INTERVAL '1 week'))))
WHERE duration_in_weeks IS NOT NULL
SQL
)
end
end
def down
remove_concurrent_index_by_name :iterations_cadences, INDEX_NAME
end
def index_exists_and_is_valid?
execute(
<<-SQL
SELECT identifier
FROM postgres_indexes
WHERE identifier LIKE '%#{INDEX_NAME}' AND valid_index=TRUE
SQL
).any?
end
end
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