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+-- 117_obj2_mapping_backfill_fast.sql
+-- Issue #307 OBJ-2 (continued from 116 hotfix).
+--
+-- Migration 116 был trimmed до GIST index only из-за heavy CTE timeout.
+-- Эта migration делает фактический INSERT через **pre-materialized temp tables**
+-- (avoid full CROSS JOIN LATERAL scan). Composite score = name 0.6 + dev 0.25 + district 0.15.
+-- Threshold composite >= 0.75. ON CONFLICT DO NOTHING (idempotent).
+--
+-- Estimated runtime после оптимизации: <30s (vs old 89M-cost timeout).
+-- Coverage цель: +50-80 mappings → объединённый total ~200.
+
+BEGIN;
+
+-- Pre-materialize unmapped DOM.РФ ЕКБ objects (~1056 rows)
+CREATE TEMP TABLE _u_domrf ON COMMIT DROP AS
+SELECT o.obj_id, o.comm_name, o.dev_name, o.district_name,
+       regexp_replace(lower(coalesce(o.dev_name, '')), '[^а-яa-z0-9]', '', 'g') AS dev_norm
+  FROM domrf_kn_objects o
+ WHERE o.is_ekb = true
+   AND o.comm_name IS NOT NULL
+   AND NOT EXISTS (
+       SELECT 1 FROM objective_complex_mapping m WHERE m.domrf_obj_id = o.obj_id
+   );
+
+-- Pre-materialize distinct unmapped Objective projects (~178 rows)
+CREATE TEMP TABLE _u_obj ON COMMIT DROP AS
+SELECT DISTINCT
+       l.project_name,
+       l.developer,
+       l.district,
+       regexp_replace(lower(coalesce(l.developer, '')), '[^а-яa-z0-9]', '', 'g') AS dev_norm
+  FROM objective_lots l
+ WHERE l.project_name IS NOT NULL
+   AND l.project_name NOT IN (
+       SELECT objective_complex_name FROM objective_complex_mapping
+   );
+
+-- Top-3 candidates per DOM.РФ obj_id using GIST trgm index (from migration 116)
+CREATE TEMP TABLE _pairs ON COMMIT DROP AS
+SELECT
+    d.obj_id,
+    o.project_name,
+    o.developer,
+    o.district,
+    similarity(d.comm_name, o.project_name)                  AS name_sim,
+    (d.dev_norm = o.dev_norm AND d.dev_norm <> '')::int      AS dev_match,
+    (
+        coalesce(d.district_name, '') ILIKE '%' || coalesce(o.district, '') || '%'
+     OR coalesce(o.district, '')      ILIKE '%' || coalesce(d.district_name, '') || '%'
+    )::int                                                    AS district_match
+  FROM _u_domrf d
+  CROSS JOIN LATERAL (
+      SELECT u.project_name, u.developer, u.district, u.dev_norm
+        FROM _u_obj u
+       WHERE similarity(d.comm_name, u.project_name) > 0.3
+       ORDER BY similarity(d.comm_name, u.project_name) DESC
+       LIMIT 3
+  ) o;
+
+-- Rank per obj_id by composite score, pick top
+WITH ranked AS (
+    SELECT
+        obj_id, project_name,
+        (name_sim * 0.6 + dev_match * 0.25 + district_match * 0.15) AS composite,
+        ROW_NUMBER() OVER (
+            PARTITION BY obj_id
+            ORDER BY (name_sim * 0.6 + dev_match * 0.25 + district_match * 0.15) DESC,
+                     name_sim DESC
+        ) AS rn
+      FROM _pairs
+)
+INSERT INTO objective_complex_mapping
+    (objective_complex_name, domrf_obj_id, objective_group,
+     match_method, match_score, is_reviewed, note)
+SELECT
+    r.project_name,
+    r.obj_id,
+    'Екатеринбург',
+    'multi_feature_v1',
+    r.composite,
+    false,
+    'OBJ-2 multi-feature 117_fast 2026-05-17 (name 0.6 + dev 0.25 + district 0.15)'
+  FROM ranked r
+ WHERE r.rn = 1
+   AND r.composite >= 0.75
+ON CONFLICT (objective_complex_name, objective_group) DO NOTHING;
+
+COMMIT;
+
+-- REFRESH MV outside tx (CONCURRENTLY requires non-tx)
+REFRESH MATERIALIZED VIEW CONCURRENTLY mv_layout_velocity;