示例#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;
 }
示例#2
0
  /**
   * 修复DDL路由
   *
   * @return RouteResultset
   * @author aStoneGod
   */
  public static RouteResultset routeToDDLNode(
      RouteResultset rrs, int sqlType, String stmt, SchemaConfig schema)
      throws SQLSyntaxErrorException {
    // 检查表是否在配置文件中
    stmt = getFixedSql(stmt);
    String tablename = "";
    final String upStmt = stmt.toUpperCase();
    if (upStmt.startsWith("CREATE")) {
      tablename = RouterUtil.getTableName(stmt, RouterUtil.getCreateTablePos(upStmt, 0));
    } else if (upStmt.startsWith("DROP")) {
      tablename = RouterUtil.getTableName(stmt, RouterUtil.getDropTablePos(upStmt, 0));
    } else if (upStmt.startsWith("ALTER")) {
      tablename = RouterUtil.getTableName(stmt, RouterUtil.getAlterTablePos(upStmt, 0));
    } else if (upStmt.startsWith("TRUNCATE")) {
      tablename = RouterUtil.getTableName(stmt, RouterUtil.getTruncateTablePos(upStmt, 0));
    }
    tablename = tablename.toUpperCase();

    if (schema.getTables().containsKey(tablename)) {
      if (ServerParse.DDL == sqlType) {
        List<String> dataNodes = new ArrayList<>();
        Map<String, TableConfig> tables = schema.getTables();
        TableConfig tc;
        if (tables != null && (tc = tables.get(tablename)) != null) {
          dataNodes = tc.getDataNodes();
        }
        Iterator<String> iterator1 = dataNodes.iterator();
        int nodeSize = dataNodes.size();
        RouteResultsetNode[] nodes = new RouteResultsetNode[nodeSize];

        for (int i = 0; i < nodeSize; i++) {
          String name = iterator1.next();
          nodes[i] = new RouteResultsetNode(name, sqlType, stmt);
        }
        rrs.setNodes(nodes);
      }
      return rrs;
    } else if (schema.getDataNode() != null) { // 默认节点ddl
      RouteResultsetNode[] nodes = new RouteResultsetNode[1];
      nodes[0] = new RouteResultsetNode(schema.getDataNode(), sqlType, stmt);
      rrs.setNodes(nodes);
      return rrs;
    }
    // 不在,返回null
    LOGGER.error("table not in schema----" + tablename);
    throw new SQLSyntaxErrorException("op table not in schema----" + tablename);
  }
示例#3
0
  public static boolean processERChildTable(
      final SchemaConfig schema, final String origSQL, final ServerConnection sc)
      throws SQLNonTransientException {
    String tableName = StringUtil.getTableName(origSQL).toUpperCase();
    final TableConfig tc = schema.getTables().get(tableName);

    if (null != tc && tc.isChildTable()) {
      final RouteResultset rrs = new RouteResultset(origSQL, ServerParse.INSERT);
      String joinKey = tc.getJoinKey();
      MySqlInsertStatement insertStmt =
          (MySqlInsertStatement) (new MySqlStatementParser(origSQL)).parseInsert();
      int joinKeyIndex = getJoinKeyIndex(insertStmt.getColumns(), joinKey);

      if (joinKeyIndex == -1) {
        String inf = "joinKey not provided :" + tc.getJoinKey() + "," + insertStmt;
        LOGGER.warn(inf);
        throw new SQLNonTransientException(inf);
      }
      if (isMultiInsert(insertStmt)) {
        String msg = "ChildTable multi insert not provided";
        LOGGER.warn(msg);
        throw new SQLNonTransientException(msg);
      }

      String joinKeyVal = insertStmt.getValues().getValues().get(joinKeyIndex).toString();

      String sql = insertStmt.toString();

      // try to route by ER parent partion key
      RouteResultset theRrs = RouterUtil.routeByERParentKey(sql, rrs, tc, joinKeyVal);

      if (theRrs != null) {
        rrs.setFinishedRoute(true);
        sc.getSession2().execute(rrs, ServerParse.INSERT);
        return true;
      }

      // route by sql query root parent's datanode
      final String findRootTBSql = tc.getLocateRTableKeySql().toLowerCase() + joinKeyVal;
      if (LOGGER.isDebugEnabled()) {
        LOGGER.debug("find root parent's node sql " + findRootTBSql);
      }

      ListenableFuture<String> listenableFuture =
          MycatServer.getInstance()
              .getListeningExecutorService()
              .submit(
                  new Callable<String>() {
                    @Override
                    public String call() throws Exception {
                      FetchStoreNodeOfChildTableHandler fetchHandler =
                          new FetchStoreNodeOfChildTableHandler();
                      return fetchHandler.execute(
                          schema.getName(), findRootTBSql, tc.getRootParent().getDataNodes());
                    }
                  });

      Futures.addCallback(
          listenableFuture,
          new FutureCallback<String>() {
            @Override
            public void onSuccess(String result) {
              if (Strings.isNullOrEmpty(result)) {
                StringBuilder s = new StringBuilder();
                LOGGER.warn(
                    s.append(sc.getSession2()).append(origSQL).toString()
                        + " err:"
                        + "can't find (root) parent sharding node for sql:"
                        + origSQL);
                sc.writeErrMessage(
                    ErrorCode.ER_PARSE_ERROR,
                    "can't find (root) parent sharding node for sql:" + origSQL);
                return;
              }

              if (LOGGER.isDebugEnabled()) {
                LOGGER.debug(
                    "found partion node for child table to insert " + result + " sql :" + origSQL);
              }

              RouteResultset executeRrs = RouterUtil.routeToSingleNode(rrs, result, origSQL);
              sc.getSession2().execute(executeRrs, ServerParse.INSERT);
            }

            @Override
            public void onFailure(Throwable t) {
              StringBuilder s = new StringBuilder();
              LOGGER.warn(
                  s.append(sc.getSession2()).append(origSQL).toString() + " err:" + t.getMessage());
              sc.writeErrMessage(ErrorCode.ER_PARSE_ERROR, t.getMessage() + " " + s.toString());
            }
          },
          MycatServer.getInstance().getListeningExecutorService());
      return true;
    }
    return false;
  }
示例#4
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());
        }
      }
    }
  }
示例#5
0
  /**
   * 多表路由
   *
   * @param schema
   * @param ctx
   * @param tables
   * @param rrs
   * @param isSelect
   * @return
   * @throws SQLNonTransientException
   */
  public static RouteResultset tryRouteForTables(
      SchemaConfig schema,
      DruidShardingParseInfo ctx,
      RouteCalculateUnit routeUnit,
      RouteResultset rrs,
      boolean isSelect,
      LayerCachePool cachePool)
      throws SQLNonTransientException {
    List<String> tables = ctx.getTables();
    if (schema.isNoSharding() || (tables.size() >= 1 && isNoSharding(schema, tables.get(0)))) {
      return routeToSingleNode(rrs, schema.getDataNode(), ctx.getSql());
    }

    // 只有一个表的
    if (tables.size() == 1) {
      return RouterUtil.tryRouteForOneTable(
          schema, ctx, routeUnit, tables.get(0), rrs, isSelect, cachePool);
    }

    Set<String> retNodesSet = new HashSet<String>();
    // 每个表对应的路由映射
    Map<String, Set<String>> tablesRouteMap = new HashMap<String, Set<String>>();

    // 分库解析信息不为空
    Map<String, Map<String, Set<ColumnRoutePair>>> tablesAndConditions =
        routeUnit.getTablesAndConditions();
    if (tablesAndConditions != null && tablesAndConditions.size() > 0) {
      // 为分库表找路由
      RouterUtil.findRouteWithcConditionsForTables(
          schema, rrs, tablesAndConditions, tablesRouteMap, ctx.getSql(), cachePool, isSelect);
      if (rrs.isFinishedRoute()) {
        return rrs;
      }
    }

    // 为全局表和单库表找路由
    for (String tableName : tables) {
      TableConfig tableConfig = schema.getTables().get(tableName.toUpperCase());
      if (tableConfig == null) {
        String msg =
            "can't find table define in schema " + tableName + " schema:" + schema.getName();
        LOGGER.warn(msg);
        throw new SQLNonTransientException(msg);
      }
      if (tableConfig.isGlobalTable()) { // 全局表
        if (tablesRouteMap.get(tableName) == null) {
          tablesRouteMap.put(tableName, new HashSet<String>());
        }
        tablesRouteMap.get(tableName).addAll(tableConfig.getDataNodes());
      } else if (tablesRouteMap.get(tableName) == null) { // 余下的表都是单库表
        tablesRouteMap.put(tableName, new HashSet<String>());
        tablesRouteMap.get(tableName).addAll(tableConfig.getDataNodes());
      }
    }

    boolean isFirstAdd = true;
    for (Map.Entry<String, Set<String>> entry : tablesRouteMap.entrySet()) {
      if (entry.getValue() == null || entry.getValue().size() == 0) {
        throw new SQLNonTransientException("parent key can't find any valid datanode ");
      } else {
        if (isFirstAdd) {
          retNodesSet.addAll(entry.getValue());
          isFirstAdd = false;
        } else {
          retNodesSet.retainAll(entry.getValue());
          if (retNodesSet.size() == 0) { // 两个表的路由无交集
            String errMsg =
                "invalid route in sql, multi tables found but datanode has no intersection "
                    + " sql:"
                    + ctx.getSql();
            LOGGER.warn(errMsg);
            throw new SQLNonTransientException(errMsg);
          }
        }
      }
    }

    if (retNodesSet != null && retNodesSet.size() > 0) {
      if (retNodesSet.size() > 1 && isAllGlobalTable(ctx, schema)) {
        // mulit routes ,not cache route result
        if (isSelect) {
          rrs.setCacheAble(false);
          routeToSingleNode(rrs, retNodesSet.iterator().next(), ctx.getSql());
        } else { // delete 删除全局表的记录
          routeToMultiNode(isSelect, rrs, retNodesSet, ctx.getSql(), true);
        }

      } else {
        routeToMultiNode(isSelect, rrs, retNodesSet, ctx.getSql());
      }
    }
    return rrs;
  }