fix: 完成商务迁移复核与接口优化并清理历史资料

internal/data/business/report_build.go

@@ -41,14 +41,12 @@ func (r *reportBuildRepo) Rebuild(ctx context.Context, kind business.ReportBuild
 			reportTable, keyTable = "tab_sw_report_server_day", "tab_sw_report_server_day_key"
 			rawTable = "tab_user_play_info"
 		}
-		for _, table := range []string{reportTable, keyTable, rawTable, "tab_user", "tab_spend", "tab_game"} {
-			available, err := businessTableAvailable(tx, table)
-			if err != nil {
-				return err
-			}
-			if !available {
-				return business.ErrReportBuildUnavailable
-			}
+		available, err := businessTablesAvailable(tx, reportTable, keyTable, rawTable, "tab_user", "tab_spend", "tab_game")
+		if err != nil {
+			return err
+		}
+		if !available {
+			return business.ErrReportBuildUnavailable
 		}
 		statDate := day.Format("2006-01-02")
 		lock := reportBuildLockPO{Kind: string(kind), StatDate: statDate}
@@ -133,7 +131,11 @@ func loadReportInput(db *gorm.DB, kind business.ReportBuildKind, day time.Time)
 			cast = "CAST(register_time AS UNSIGNED)"
 		}
 		var registers, actives []reportEventPO
-		if err := db.Table("tab_user").Select("id AS user_id,source_db,promote_id,fgame_id AS game_id").Where("puid=0").Where(cast+" BETWEEN ? AND ?", begin, end).Scan(&registers).Error; err != nil {
+		registerQuery, err := reportRegistrationQuery(db)
+		if err != nil {
+			return nil, err
+		}
+		if err := registerQuery.Select("id AS user_id,source_db,promote_id,fgame_id AS game_id").Where("puid=0").Where(cast+" BETWEEN ? AND ?", begin, end).Scan(&registers).Error; err != nil {
 			return nil, business.ErrStorage
 		}
 		if err := db.Table("tab_user_day_login").Select("user_id,source_db,promote_id,game_id").Where("login_time BETWEEN ? AND ?", begin, end).Scan(&actives).Error; err != nil {
@@ -204,3 +206,37 @@ func loadReportInput(db *gorm.DB, kind business.ReportBuildKind, day time.Time)
 	}
 	return input, nil
 }
+
+func reportRegistrationQuery(db *gorm.DB) (*gorm.DB, error) {
+	q := db.Table("tab_user")
+	if db.Dialector.Name() != "mysql" || !db.Migrator().HasIndex("tab_user", "idx_sw_user_registration") {
+		return q, nil
+	}
+	// 跨平台任务也必须提供组合索引的首列，避免又回到数百万主账号扫描。
+	// 平台值取同一事务中的实际数据，不写死平台名单，也保留历史 NULL。
+	var rows []struct {
+		SourceDB *string `gorm:"column:source_db"`
+	}
+	if err := db.Table("tab_user").Distinct("source_db").Scan(&rows).Error; err != nil {
+		return nil, business.ErrStorage
+	}
+	sources := []string{}
+	hasNull := false
+	for _, row := range rows {
+		if row.SourceDB == nil {
+			hasNull = true
+		} else {
+			sources = append(sources, *row.SourceDB)
+		}
+	}
+	if len(sources) == 0 {
+		if hasNull {
+			return q.Where("source_db IS NULL"), nil
+		}
+		return q.Where("1=0"), nil
+	}
+	if hasNull {
+		return q.Where("(source_db IN ? OR source_db IS NULL)", sources), nil
+	}
+	return q.Where("source_db IN ?", sources), nil
+}