first commit

server/prisma/migrations/20260501133000_add_log_instance_id/migration.sql

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+ALTER TABLE "logs"
+ADD COLUMN "instance_id" INTEGER;
+
+ALTER TABLE "logs"
+ADD CONSTRAINT "logs_instance_id_fkey"
+FOREIGN KEY ("instance_id") REFERENCES "instances"("id")
+ON DELETE SET NULL ON UPDATE CASCADE;
+
+CREATE INDEX "logs_instance_id_idx" ON "logs"("instance_id");
+
+WITH id_matches AS (
+  SELECT
+    l."id" AS "log_id",
+    l."user_id",
+    (m."match")[1]::integer AS "instance_id"
+  FROM "logs" l
+  CROSS JOIN LATERAL regexp_matches(l."content", 'instance[[:space:]]*#([0-9]+)', 'gi') AS m("match")
+  WHERE l."instance_id" IS NULL
+
+  UNION ALL
+
+  SELECT
+    l."id" AS "log_id",
+    l."user_id",
+    (m."match")[1]::integer AS "instance_id"
+  FROM "logs" l
+  CROSS JOIN LATERAL regexp_matches(l."content", 'instance:[[:space:]]*[^()]*\(#([0-9]+)\)', 'gi') AS m("match")
+  WHERE l."instance_id" IS NULL
+
+  UNION ALL
+
+  SELECT
+    l."id" AS "log_id",
+    l."user_id",
+    (m."match")[1]::integer AS "instance_id"
+  FROM "logs" l
+  CROSS JOIN LATERAL regexp_matches(l."content", 'new instance ID:[[:space:]]*([0-9]+)', 'gi') AS m("match")
+  WHERE l."instance_id" IS NULL
+),
+id_candidates AS (
+  SELECT
+    im."log_id",
+    MIN(im."instance_id") AS "instance_id",
+    COUNT(DISTINCT im."instance_id") AS "match_count"
+  FROM id_matches im
+  JOIN "instances" i
+    ON i."id" = im."instance_id"
+   AND (im."user_id" IS NULL OR i."user_id" = im."user_id")
+  GROUP BY im."log_id"
+)
+UPDATE "logs" l
+SET "instance_id" = c."instance_id"
+FROM id_candidates c
+WHERE l."id" = c."log_id"
+  AND c."match_count" = 1;
+
+WITH rename_logs AS (
+  SELECT
+    l."id",
+    l."user_id",
+    l."created_at",
+    substring(l."content" from 'Renamed instance from "([^"]+)" to "[^"]+"') AS "old_name",
+    substring(l."content" from 'Renamed instance from "[^"]+" to "([^"]+)"') AS "new_name"
+  FROM "logs" l
+  WHERE l."action" = 'instance.rename'
+    AND l."instance_id" IS NULL
+),
+rename_candidates AS (
+  SELECT
+    r."id" AS "log_id",
+    i."id" AS "instance_id",
+    COUNT(*) OVER (PARTITION BY r."id") AS "match_count"
+  FROM rename_logs r
+  JOIN "instances" i
+    ON i."user_id" = r."user_id"
+   AND i."name" = r."new_name"
+   AND i."created_at" <= r."created_at"
+  WHERE r."old_name" IS NOT NULL
+    AND r."new_name" IS NOT NULL
+)
+UPDATE "logs" l
+SET "instance_id" = c."instance_id"
+FROM rename_candidates c
+WHERE l."id" = c."log_id"
+  AND c."match_count" = 1;
+
+WITH RECURSIVE rename_history AS (
+  SELECT
+    l."user_id",
+    l."instance_id",
+    i."created_at" AS "instance_created_at",
+    substring(l."content" from 'Renamed instance from "([^"]+)" to "[^"]+"') AS "old_name",
+    substring(l."content" from 'Renamed instance from "[^"]+" to "([^"]+)"') AS "new_name",
+    l."created_at",
+    1 AS "depth"
+  FROM "logs" l
+  JOIN "instances" i
+    ON i."id" = l."instance_id"
+  WHERE l."action" = 'instance.rename'
+    AND l."instance_id" IS NOT NULL
+
+  UNION ALL
+
+  SELECT
+    prev."user_id",
+    rh."instance_id",
+    rh."instance_created_at",
+    substring(prev."content" from 'Renamed instance from "([^"]+)" to "[^"]+"') AS "old_name",
+    substring(prev."content" from 'Renamed instance from "[^"]+" to "([^"]+)"') AS "new_name",
+    prev."created_at",
+    rh."depth" + 1 AS "depth"
+  FROM rename_history rh
+  JOIN "logs" prev
+    ON prev."action" = 'instance.rename'
+   AND prev."user_id" = rh."user_id"
+   AND prev."created_at" < rh."created_at"
+   AND substring(prev."content" from 'Renamed instance from "[^"]+" to "([^"]+)"') = rh."old_name"
+  WHERE rh."depth" < 20
+),
+old_name_candidates AS (
+  SELECT
+    l."id" AS "log_id",
+    r."instance_id",
+    COUNT(*) OVER (PARTITION BY l."id") AS "match_count"
+  FROM "logs" l
+  JOIN rename_history r
+    ON r."user_id" = l."user_id"
+   AND l."created_at" < r."created_at"
+   AND l."created_at" >= r."instance_created_at"
+   AND strpos(lower(l."content"), lower('instance "' || r."old_name" || '"')) > 0
+  WHERE l."instance_id" IS NULL
+    AND r."old_name" IS NOT NULL
+    AND r."new_name" IS NOT NULL
+)
+UPDATE "logs" l
+SET "instance_id" = c."instance_id"
+FROM old_name_candidates c
+WHERE l."id" = c."log_id"
+  AND c."match_count" = 1;
+
+WITH current_name_candidates AS (
+  SELECT
+    l."id" AS "log_id",
+    i."id" AS "instance_id",
+    COUNT(*) OVER (PARTITION BY l."id") AS "match_count"
+  FROM "logs" l
+  JOIN "instances" i
+    ON i."user_id" = l."user_id"
+   AND l."created_at" >= i."created_at"
+   AND strpos(lower(l."content"), lower('instance "' || i."name" || '"')) > 0
+  WHERE l."instance_id" IS NULL
+)
+UPDATE "logs" l
+SET "instance_id" = c."instance_id"
+FROM current_name_candidates c
+WHERE l."id" = c."log_id"
+  AND c."match_count" = 1;