fix 跨月的时候 数据可能卡住的问题

consumers/consumerSinoGnssMySQL.go

@@ -90,16 +90,33 @@ func (the *consumerSinoGnssMySQL) onData() {
 		log.Printf("读取 缓存异常,err=%v", err.Error())
 		return
 	}
+	// 先切换月表，避免旧表查空或查询失败后一直无法切表。
+	newTableName := tableNameNow()
+	if recordInfo.TableName != newTableName {
+		log.Printf("跨月切表: %s => %s, id重置为0", recordInfo.TableName, newTableName)
+		recordInfo.TableName = newTableName
+		recordInfo.Id = 0
+		cacheStr, _ := json.Marshal(recordInfo)
+		if err := utils.SaveCache2File(string(cacheStr), "cache.inout"); err != nil {
+			log.Printf("保存跨月游标失败: %v", err)
+			return
+		}
+	}
 	sql := fmt.Sprintf(`select d.id,d.station_name,p.group_name,d.time,d.x,d.y,d.h from %s as d 
 LEFT JOIN datasolution as p
 ON d.station_name=p.sn
 where p.group_name is not null
-and d.id > %d and d.id <= %d
-ORDER BY p.group_name;`, recordInfo.TableName, recordInfo.Id, recordInfo.Id+200)
+and d.id > %d
+ORDER BY d.id
+LIMIT 200;`, recordInfo.TableName, recordInfo.Id)
 	var GnssDatas []SinoGnssMySQL.GnssData
 	err = the.InDB.Query(&GnssDatas, sql)
-	if err != nil || len(GnssDatas) == 0 {
-		log.Printf("当前批次无数据,跳过")
+	if err != nil {
+		log.Printf("查询GNSS数据失败, table=%s, id=%d, err=%v", recordInfo.TableName, recordInfo.Id, err)
+		return
+	}
+	if len(GnssDatas) == 0 {
+		log.Printf("当前批次无数据, table=%s, id=%d", recordInfo.TableName, recordInfo.Id)
 		return
 	}
 	maxId := MaxId(GnssDatas)
@@ -111,12 +128,6 @@ ORDER BY p.group_name;`, recordInfo.TableName, recordInfo.Id, recordInfo.Id+200)
 		the.ch <- needPush
 	}
 	fileName := "cache.inout"
-	//发现新月新纪录
-	newTableName := tableNameNow()
-	if recordInfo.TableName != newTableName {
-		recordInfo.TableName = newTableName
-		recordInfo.Id = 0
-	}
 	cacheStr, _ := json.Marshal(recordInfo)
 	err = utils.SaveCache2File(string(cacheStr), fileName)
 	if err != nil {