44 lines
1.9 KiB
PL/PgSQL
44 lines
1.9 KiB
PL/PgSQL
-- 105_add_sales_started_flag.sql
|
||
--
|
||
-- Context: SF FixList #18 (Wave 3)
|
||
-- Purpose: Expose is_sales_started flag on domrf_kn_objects so SiteFinder can
|
||
-- distinguish "Строящиеся с открытыми продажами" from pre-sale buildings
|
||
-- (those where domrf_kn_flats has no rows for that obj_id yet).
|
||
--
|
||
-- Design decision: VIEW instead of GENERATED ALWAYS AS column.
|
||
-- - PostgreSQL GENERATED columns do not support subqueries (only immutable expressions).
|
||
-- - A VIEW is idempotent (CREATE OR REPLACE), needs no backfill, and stays fresh.
|
||
-- - Consumers query v_domrf_objects_with_sales in place of domrf_kn_objects where
|
||
-- the flag is needed; the base table remains unchanged for scrapers / ON CONFLICT.
|
||
--
|
||
-- Audit (2026-05-17, region_cd=66, site_status='Строящиеся'):
|
||
-- total_buildings: 1322
|
||
-- with_flats (is_sales_started=TRUE): 1247 (94.3%)
|
||
-- without_flats (pre-sale / no flats): 75 ( 5.7%)
|
||
--
|
||
-- Dependencies: domrf_kn_objects, domrf_kn_flats
|
||
-- Deploy order: standalone, no existing deps to drop first
|
||
-- Idempotent: yes (CREATE OR REPLACE VIEW)
|
||
|
||
BEGIN;
|
||
|
||
CREATE OR REPLACE VIEW v_domrf_objects_with_sales AS
|
||
SELECT
|
||
o.*,
|
||
EXISTS (
|
||
SELECT 1
|
||
FROM domrf_kn_flats f
|
||
WHERE f.obj_id = o.obj_id
|
||
) AS is_sales_started
|
||
FROM domrf_kn_objects o;
|
||
|
||
COMMENT ON VIEW v_domrf_objects_with_sales IS
|
||
'domrf_kn_objects + is_sales_started (bool). '
|
||
'TRUE когда в domrf_kn_flats есть хотя бы одна запись для данного obj_id. '
|
||
'Позволяет отличать строящиеся дома с открытыми продажами от pre-sale объектов.';
|
||
|
||
COMMENT ON COLUMN v_domrf_objects_with_sales.is_sales_started IS
|
||
'Derived: TRUE если EXISTS (SELECT 1 FROM domrf_kn_flats WHERE obj_id = o.obj_id). '
|
||
'Pre-sale = FALSE (квартиры ещё не выложены на domrf.ru).';
|
||
|
||
COMMIT;
|