Examples with ColumnRoutePair io.mycat.sqlengine.mpp.ColumnRoutePair used on opensource projects

Example 16 with ColumnRoutePair

use of io.mycat.sqlengine.mpp.ColumnRoutePair in project Mycat-Server by MyCATApache.

the class RouterUtil method findRouteWithcConditionsForTables.

/**
 * 处理分库表路由
 */
public static void findRouteWithcConditionsForTables(SchemaConfig schema, RouteResultset rrs, Map<String, Map<String, Set<ColumnRoutePair>>> tablesAndConditions, Map<String, Set<String>> tablesRouteMap, String sql, LayerCachePool cachePool, boolean isSelect) throws SQLNonTransientException {
    // 为分库表找路由
    for (Map.Entry<String, Map<String, Set<ColumnRoutePair>>> entry : tablesAndConditions.entrySet()) {
        String tableName = entry.getKey().toUpperCase();
        TableConfig tableConfig = schema.getTables().get(tableName);
        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.getDistTables() != null && tableConfig.getDistTables().size() > 0) {
            routeToDistTableNode(tableName, schema, rrs, sql, tablesAndConditions, cachePool, isSelect);
        }
        // 全局表或者不分库的表略过（全局表后面再计算）
        if (tableConfig.isGlobalTable() || schema.getTables().get(tableName).getDataNodes().size() == 1) {
            continue;
        } else {
            // 非全局表：分库表、childTable、其他
            Map<String, Set<ColumnRoutePair>> columnsMap = entry.getValue();
            String joinKey = tableConfig.getJoinKey();
            String partionCol = tableConfig.getPartitionColumn();
            String primaryKey = tableConfig.getPrimaryKey();
            boolean isFoundPartitionValue = partionCol != null && entry.getValue().get(partionCol) != null;
            boolean isLoadData = false;
            if (LOGGER.isDebugEnabled() && sql.startsWith(LoadData.loadDataHint) || rrs.isLoadData()) {
                // 由于load data一次会计算很多路由数据，如果输出此日志会极大降低load data的性能
                isLoadData = true;
            }
            if (entry.getValue().get(primaryKey) != null && entry.getValue().size() == 1 && !isLoadData) {
                // 主键查找
                // try by primary key if found in cache
                Set<ColumnRoutePair> primaryKeyPairs = entry.getValue().get(primaryKey);
                if (primaryKeyPairs != null) {
                    if (LOGGER.isDebugEnabled()) {
                        LOGGER.debug("try to find cache by primary key ");
                    }
                    String tableKey = schema.getName() + '_' + tableName;
                    boolean allFound = true;
                    for (ColumnRoutePair pair : primaryKeyPairs) {
                        // 可能id in(1,2,3)多主键
                        String cacheKey = pair.colValue;
                        String dataNode = (String) cachePool.get(tableKey, cacheKey);
                        if (dataNode == null) {
                            allFound = false;
                            continue;
                        } else {
                            if (tablesRouteMap.get(tableName) == null) {
                                tablesRouteMap.put(tableName, new HashSet<String>());
                            }
                            tablesRouteMap.get(tableName).add(dataNode);
                            continue;
                        }
                    }
                    if (!allFound) {
                        // need cache primary key ->datanode relation
                        if (isSelect && tableConfig.getPrimaryKey() != null) {
                            rrs.setPrimaryKey(tableKey + '.' + tableConfig.getPrimaryKey());
                        }
                    } else {
                        // 主键缓存中找到了就执行循环的下一轮
                        continue;
                    }
                }
            }
            if (isFoundPartitionValue) {
                // 分库表
                Set<ColumnRoutePair> partitionValue = columnsMap.get(partionCol);
                if (partitionValue == null || partitionValue.size() == 0) {
                    if (tablesRouteMap.get(tableName) == null) {
                        tablesRouteMap.put(tableName, new HashSet<String>());
                    }
                    tablesRouteMap.get(tableName).addAll(tableConfig.getDataNodes());
                } else {
                    for (ColumnRoutePair pair : partitionValue) {
                        AbstractPartitionAlgorithm algorithm = tableConfig.getRule().getRuleAlgorithm();
                        if (pair.colValue != null) {
                            Integer nodeIndex = algorithm.calculate(pair.colValue);
                            if (nodeIndex == null) {
                                String msg = "can't find any valid datanode :" + tableConfig.getName() + " -> " + tableConfig.getPartitionColumn() + " -> " + pair.colValue;
                                LOGGER.warn(msg);
                                throw new SQLNonTransientException(msg);
                            }
                            ArrayList<String> dataNodes = tableConfig.getDataNodes();
                            String node;
                            if (nodeIndex >= 0 && nodeIndex < dataNodes.size()) {
                                node = dataNodes.get(nodeIndex);
                            } else {
                                node = null;
                                String msg = "Can't find a valid data node for specified node index :" + tableConfig.getName() + " -> " + tableConfig.getPartitionColumn() + " -> " + pair.colValue + " -> " + "Index : " + nodeIndex;
                                LOGGER.warn(msg);
                                throw new SQLNonTransientException(msg);
                            }
                            if (node != null) {
                                if (tablesRouteMap.get(tableName) == null) {
                                    tablesRouteMap.put(tableName, new HashSet<String>());
                                }
                                if (algorithm instanceof SlotFunction) {
                                    rrs.getDataNodeSlotMap().put(node, ((SlotFunction) algorithm).slotValue());
                                }
                                tablesRouteMap.get(tableName).add(node);
                            }
                        }
                        if (pair.rangeValue != null) {
                            Integer[] nodeIndexs = algorithm.calculateRange(pair.rangeValue.beginValue.toString(), pair.rangeValue.endValue.toString());
                            ArrayList<String> dataNodes = tableConfig.getDataNodes();
                            String node;
                            for (Integer idx : nodeIndexs) {
                                if (idx >= 0 && idx < dataNodes.size()) {
                                    node = dataNodes.get(idx);
                                } else {
                                    String msg = "Can't find valid data node(s) for some of specified node indexes :" + tableConfig.getName() + " -> " + tableConfig.getPartitionColumn();
                                    LOGGER.warn(msg);
                                    throw new SQLNonTransientException(msg);
                                }
                                if (node != null) {
                                    if (tablesRouteMap.get(tableName) == null) {
                                        tablesRouteMap.put(tableName, new HashSet<String>());
                                    }
                                    if (algorithm instanceof SlotFunction) {
                                        rrs.getDataNodeSlotMap().put(node, ((SlotFunction) algorithm).slotValue());
                                    }
                                    tablesRouteMap.get(tableName).add(node);
                                }
                            }
                        }
                    }
                }
            } else if (joinKey != null && columnsMap.get(joinKey) != null && columnsMap.get(joinKey).size() != 0) {
                // childTable  (如果是select 语句的父子表join)之前要找到root table,将childTable移除,只留下root table
                Set<ColumnRoutePair> joinKeyValue = columnsMap.get(joinKey);
                Set<String> dataNodeSet = ruleByJoinValueCalculate(rrs, tableConfig, joinKeyValue);
                if (dataNodeSet.isEmpty()) {
                    throw new SQLNonTransientException("parent key can't find any valid datanode ");
                }
                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("found partion nodes (using parent partion rule directly) for child table to update  " + Arrays.toString(dataNodeSet.toArray()) + " sql :" + sql);
                }
                if (dataNodeSet.size() > 1) {
                    routeToMultiNode(rrs.isCacheAble(), rrs, dataNodeSet, sql);
                    rrs.setFinishedRoute(true);
                    return;
                } else {
                    rrs.setCacheAble(true);
                    routeToSingleNode(rrs, dataNodeSet.iterator().next(), sql);
                    return;
                }
            } else {
                // 没找到拆分字段，该表的所有节点都路由
                if (tablesRouteMap.get(tableName) == null) {
                    tablesRouteMap.put(tableName, new HashSet<String>());
                }
                boolean isSlotFunction = tableConfig.getRule() != null && tableConfig.getRule().getRuleAlgorithm() instanceof SlotFunction;
                if (isSlotFunction) {
                    for (String dn : tableConfig.getDataNodes()) {
                        rrs.getDataNodeSlotMap().put(dn, -1);
                    }
                }
                tablesRouteMap.get(tableName).addAll(tableConfig.getDataNodes());
            }
        }
    }
}