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# frozen_string_literal: true
class AddPartitionsView < ActiveRecord::Migration[6.0]
DOWNTIME = false
def up
execute(<<~SQL)
CREATE OR REPLACE VIEW postgres_partitions AS
SELECT
pg_namespace.nspname::text || '.'::text || pg_class.relname::text AS identifier,
pg_class.oid AS oid,
pg_namespace.nspname AS schema,
pg_class.relname AS name,
parent_namespace.nspname::text || '.'::text || parent_class.relname::text AS parent_identifier,
pg_get_expr(pg_class.relpartbound, pg_inherits.inhrelid) AS condition
FROM pg_class
INNER JOIN pg_namespace
ON pg_namespace.oid = pg_class.relnamespace
INNER JOIN pg_inherits
ON pg_class.oid = pg_inherits.inhrelid
INNER JOIN pg_class parent_class
ON pg_inherits.inhparent = parent_class.oid
INNER JOIN pg_namespace parent_namespace
ON parent_class.relnamespace = parent_namespace.oid
WHERE pg_class.relispartition
AND pg_namespace.nspname IN (
current_schema(),
'gitlab_partitions_dynamic',
'gitlab_partitions_static'
)
SQL
end
def down
execute(<<~SQL)
DROP VIEW IF EXISTS postgres_partitions
SQL
end
end
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