Beispiel #1
0
 /**
  * 根据 ER分片规则获取路由集合
  *
  * @param stmt 执行的语句
  * @param rrs 数据路由集合
  * @param tc 表实体
  * @param joinKeyVal 连接属性
  * @return RouteResultset(数据路由集合)
  * @throws SQLNonTransientException
  * @author mycat
  */
 public static RouteResultset routeByERParentKey(
     String stmt, RouteResultset rrs, TableConfig tc, String joinKeyVal)
     throws SQLNonTransientException {
   // only has one parent level and ER parent key is parent
   // table's partition key
   if (tc.isSecondLevel()
       && tc.getParentTC().getPartitionColumn().equals(tc.getParentKey())) { // using
     // parent
     // rule to
     // find
     // datanode
     Set<ColumnRoutePair> parentColVal = new HashSet<ColumnRoutePair>(1);
     ColumnRoutePair pair = new ColumnRoutePair(joinKeyVal);
     parentColVal.add(pair);
     Set<String> dataNodeSet = ruleCalculate(tc.getParentTC(), parentColVal);
     if (dataNodeSet.isEmpty() || dataNodeSet.size() > 1) {
       throw new SQLNonTransientException(
           "parent key can't find  valid datanode ,expect 1 but found: " + dataNodeSet.size());
     }
     String dn = dataNodeSet.iterator().next();
     if (LOGGER.isDebugEnabled()) {
       LOGGER.debug(
           "found partion node (using parent partion rule directly) for child table to insert  "
               + dn
               + " sql :"
               + stmt);
     }
     return RouterUtil.routeToSingleNode(rrs, dn, stmt);
   }
   return null;
 }
Beispiel #2
0
  /**
   * 单表路由
   *
   * @param schema
   * @param ctx
   * @param tableName
   * @param rrs
   * @param isSelect
   * @return
   * @throws SQLNonTransientException
   */
  public static RouteResultset tryRouteForOneTable(
      SchemaConfig schema,
      DruidShardingParseInfo ctx,
      RouteCalculateUnit routeUnit,
      String tableName,
      RouteResultset rrs,
      boolean isSelect,
      LayerCachePool cachePool)
      throws SQLNonTransientException {
    if (isNoSharding(schema, tableName)) {
      return routeToSingleNode(rrs, schema.getDataNode(), ctx.getSql());
    }

    TableConfig tc = schema.getTables().get(tableName);
    if (tc == null) {
      String msg = "can't find table define in schema " + tableName + " schema:" + schema.getName();
      LOGGER.warn(msg);
      throw new SQLNonTransientException(msg);
    }
    if (tc.isGlobalTable()) { // 全局表
      if (isSelect) {
        // global select ,not cache route result
        rrs.setCacheAble(false);
        return routeToSingleNode(rrs, tc.getRandomDataNode(), ctx.getSql());
      } else { // insert into 全局表的记录
        return routeToMultiNode(false, rrs, tc.getDataNodes(), ctx.getSql(), true);
      }
    } else { // 单表或者分库表
      if (!checkRuleRequired(schema, ctx, routeUnit, tc)) {
        throw new IllegalArgumentException(
            "route rule for table " + tc.getName() + " is required: " + ctx.getSql());
      }
      if (tc.getPartitionColumn() == null && !tc.isSecondLevel()) { // 单表且不是childTable
        //				return RouterUtil.routeToSingleNode(rrs, tc.getDataNodes().get(0),ctx.getSql());
        return routeToMultiNode(rrs.isCacheAble(), rrs, tc.getDataNodes(), ctx.getSql());
      } else {
        // 每个表对应的路由映射
        Map<String, Set<String>> tablesRouteMap = new HashMap<String, Set<String>>();
        if (routeUnit.getTablesAndConditions() != null
            && routeUnit.getTablesAndConditions().size() > 0) {
          RouterUtil.findRouteWithcConditionsForTables(
              schema,
              rrs,
              routeUnit.getTablesAndConditions(),
              tablesRouteMap,
              ctx.getSql(),
              cachePool,
              isSelect);
          if (rrs.isFinishedRoute()) {
            return rrs;
          }
        }

        if (tablesRouteMap.get(tableName) == null) {
          return routeToMultiNode(rrs.isCacheAble(), rrs, tc.getDataNodes(), ctx.getSql());
        } else {
          //					boolean isCache = rrs.isCacheAble();
          //					if(tablesRouteMap.get(tableName).size() > 1) {
          //
          //					}
          return routeToMultiNode(
              rrs.isCacheAble(), rrs, tablesRouteMap.get(tableName), ctx.getSql());
        }
      }
    }
  }
Beispiel #3
0
  /** @return dataNodeIndex -&gt; [partitionKeysValueTuple+] */
  public static Set<String> ruleByJoinValueCalculate(
      RouteResultset rrs, TableConfig tc, Set<ColumnRoutePair> colRoutePairSet)
      throws SQLNonTransientException {

    String joinValue = "";

    if (colRoutePairSet.size() > 1) {
      LOGGER.warn("joinKey can't have multi Value");
    } else {
      Iterator it = colRoutePairSet.iterator();
      ColumnRoutePair joinCol = (ColumnRoutePair) it.next();
      joinValue = joinCol.colValue;
    }

    Set<String> retNodeSet = new LinkedHashSet<String>();

    Set<String> nodeSet = new LinkedHashSet<String>();
    if (tc.isSecondLevel()
        && tc.getParentTC().getPartitionColumn().equals(tc.getParentKey())) { // using
      // parent
      // rule to
      // find
      // datanode

      nodeSet = ruleCalculate(tc.getParentTC(), colRoutePairSet);
      if (nodeSet.isEmpty()) {
        throw new SQLNonTransientException(
            "parent key can't find  valid datanode ,expect 1 but found: " + nodeSet.size());
      }
      if (LOGGER.isDebugEnabled()) {
        LOGGER.debug(
            "found partion node (using parent partion rule directly) for child table to insert  "
                + nodeSet
                + " sql :"
                + rrs.getStatement());
      }
      retNodeSet.addAll(nodeSet);

      //			for(ColumnRoutePair pair : colRoutePairSet) {
      //				nodeSet = ruleCalculate(tc.getParentTC(),colRoutePairSet);
      //				if (nodeSet.isEmpty() || nodeSet.size() > 1) {//an exception would be thrown, if sql was
      // executed on more than on sharding
      //					throw new SQLNonTransientException(
      //							"parent key can't find  valid datanode ,expect 1 but found: "
      //									+ nodeSet.size());
      //				}
      //				String dn = nodeSet.iterator().next();
      //				if (LOGGER.isDebugEnabled()) {
      //					LOGGER.debug("found partion node (using parent partion rule directly) for child table
      // to insert  "
      //							+ dn + " sql :" + rrs.getStatement());
      //				}
      //				retNodeSet.addAll(nodeSet);
      //			}
      return retNodeSet;
    } else {
      retNodeSet.addAll(tc.getParentTC().getDataNodes());
    }

    return retNodeSet;
  }