bot-backend
76baf8011d
#647-2 (P0, инфра — клиентскую цену НЕ меняет). Делает mv_quarter_price_index (#760) читаемым estimator'ом за O(1) + периодический refresh. - tradein 085_quarter_price_index_fdw.sql: FOREIGN TABLE quarter_price_index над main public.mv_quarter_price_index через существующий server gendesign_remote (паттерн 060_postgres_fdw_extension.sql, per-table). Колонки 1:1 с MV (varchar(30)/float8/bigint/text/timestamptz). DROP IF EXISTS идемпот. - main 99b_grant_quarter_price_index_fdw.sql: GRANT SELECT на MV роли tradein_fdw_reader (иначе foreign table падает; зеркало 122_grant_rosreestr). - main refresh: Celery beat (pg_cron нет). quarter_price_index_refresh.py — chained REFRESH mv_quarter_price_per_m2 → mv_quarter_price_index CONCURRENTLY; task refresh_quarter_price_index.py; beat-entry 'refresh-quarter-price-index' cron '0 2 5 * *' (05:00 MSK 5-го, после ekb-districts-medians). Lookup-индекс: MV уже несёт UNIQUE mv_quarter_price_index_uq (O(1) remote); foreign table не нуждается в локальном. Валидация (postgres-gendesign): MV 1972 строки, 0 NULL, UNIQUE indisunique=true, REFRESH CONCURRENTLY валиден. Разблокирует #647-3 (estimator integration, за гейтом #763).
58 lines
2.7 KiB
PL/PgSQL
58 lines
2.7 KiB
PL/PgSQL
-- 085_quarter_price_index_fdw.sql
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-- Issue #762 — Foreign table over MAIN DB's mv_quarter_price_index MV.
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--
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-- Context:
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-- #760 (PR #792) created public.mv_quarter_price_index in the MAIN gendesign DB.
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-- The estimator (#647-3) needs O(1) lookup by quarter_cad_number without a
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-- cross-service HTTP round-trip. FDW foreign table lets tradein read the MV
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-- directly via the already-established gendesign_remote server.
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--
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-- Reused infra:
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-- SERVER gendesign_remote — created by 060_postgres_fdw_extension.sql.
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-- Pattern: per-table FOREIGN TABLE (not IMPORT FOREIGN SCHEMA) — matches repo convention.
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-- USER MAPPING is managed at backend startup from env (see 060_postgres_fdw_extension.sql).
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--
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-- Column mapping (verified against live MV via pg_attribute, 2026-05-30):
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-- quarter_cad_number character varying(30) → varchar(30) / text (FDW accepts text for varchar)
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-- price_index double precision → double precision
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-- n_deals bigint → bigint
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-- basis text → text
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-- computed_at timestamp with time zone → timestamptz
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--
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-- Index note:
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-- The remote MV has UNIQUE index mv_quarter_price_index_uq on quarter_cad_number.
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-- FDW pushes equality predicates (WHERE quarter_cad_number = $1) down to MAIN,
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-- so remote index gives O(1) lookup. No local index on the foreign table is needed
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-- or possible (postgres_fdw does not support local indexes on foreign tables).
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--
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-- Idempotency:
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-- DROP FOREIGN TABLE IF EXISTS → CREATE is safe to re-apply.
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-- BEGIN/COMMIT per sql.md conventions.
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--
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-- Apply order:
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-- After 060_postgres_fdw_extension.sql (server must exist).
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-- After 99a_quarter_price_index.sql is applied in MAIN (MV must exist remotely).
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-- Before estimator code referencing this table is deployed (#647-3).
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BEGIN;
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DROP FOREIGN TABLE IF EXISTS quarter_price_index;
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CREATE FOREIGN TABLE quarter_price_index (
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quarter_cad_number varchar(30) NOT NULL,
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price_index double precision NOT NULL,
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n_deals bigint NOT NULL,
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basis text NOT NULL,
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computed_at timestamp with time zone NOT NULL
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)
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SERVER gendesign_remote
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OPTIONS (schema_name 'public', table_name 'mv_quarter_price_index');
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COMMENT ON FOREIGN TABLE quarter_price_index IS
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'FDW read-only view of gendesign.public.mv_quarter_price_index. '
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'Per-cadastral-quarter price index normalised to EKB city median (=1.0). '
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'Lookup by quarter_cad_number is O(1) via remote UNIQUE index on MAIN. '
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'Refresh cadence: MAIN refreshes MV via Celery beat (see quarter_price_index_refresh task). '
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'Issue: #762. Source MV: #760.';
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COMMIT;
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