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

Example 11 with ColumnRoutePair

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

the class DruidSelectParser method changeSql.

/**
 * 改写sql：需要加limit的加上
 */
@Override
public void changeSql(SchemaConfig schema, RouteResultset rrs, SQLStatement stmt, LayerCachePool cachePool) throws SQLNonTransientException {
    tryRoute(schema, rrs, cachePool);
    rrs.copyLimitToNodes();
    SQLSelectStatement selectStmt = (SQLSelectStatement) stmt;
    SQLSelectQuery sqlSelectQuery = selectStmt.getSelect().getQuery();
    if (sqlSelectQuery instanceof MySqlSelectQueryBlock) {
        MySqlSelectQueryBlock mysqlSelectQuery = (MySqlSelectQueryBlock) selectStmt.getSelect().getQuery();
        int limitStart = 0;
        int limitSize = schema.getDefaultMaxLimit();
        // clear group having
        SQLSelectGroupByClause groupByClause = mysqlSelectQuery.getGroupBy();
        // Modified by winbill, 20160614, do NOT include having clause when routing to multiple nodes
        if (groupByClause != null && groupByClause.getHaving() != null && isRoutMultiNode(schema, rrs)) {
            groupByClause.setHaving(null);
        }
        Map<String, Map<String, Set<ColumnRoutePair>>> allConditions = getAllConditions();
        boolean isNeedAddLimit = isNeedAddLimit(schema, rrs, mysqlSelectQuery, allConditions);
        if (isNeedAddLimit) {
            Limit limit = new Limit();
            limit.setRowCount(new SQLIntegerExpr(limitSize));
            mysqlSelectQuery.setLimit(limit);
            rrs.setLimitSize(limitSize);
            String sql = getSql(rrs, stmt, isNeedAddLimit);
            rrs.changeNodeSqlAfterAddLimit(schema, getCurentDbType(), sql, 0, limitSize, true);
        }
        Limit limit = mysqlSelectQuery.getLimit();
        if (limit != null && !isNeedAddLimit) {
            SQLIntegerExpr offset = (SQLIntegerExpr) limit.getOffset();
            SQLIntegerExpr count = (SQLIntegerExpr) limit.getRowCount();
            if (offset != null) {
                limitStart = offset.getNumber().intValue();
                rrs.setLimitStart(limitStart);
            }
            if (count != null) {
                limitSize = count.getNumber().intValue();
                rrs.setLimitSize(limitSize);
            }
            if (isNeedChangeLimit(rrs)) {
                Limit changedLimit = new Limit();
                changedLimit.setRowCount(new SQLIntegerExpr(limitStart + limitSize));
                if (offset != null) {
                    if (limitStart < 0) {
                        String msg = "You have an error in your SQL syntax; check the manual that " + "corresponds to your MySQL server version for the right syntax to use near '" + limitStart + "'";
                        throw new SQLNonTransientException(ErrorCode.ER_PARSE_ERROR + " - " + msg);
                    } else {
                        changedLimit.setOffset(new SQLIntegerExpr(0));
                    }
                }
                mysqlSelectQuery.setLimit(changedLimit);
                String sql = getSql(rrs, stmt, isNeedAddLimit);
                rrs.changeNodeSqlAfterAddLimit(schema, getCurentDbType(), sql, 0, limitStart + limitSize, true);
                // 设置改写后的sql
                ctx.setSql(sql);
            } else {
                rrs.changeNodeSqlAfterAddLimit(schema, getCurentDbType(), getCtx().getSql(), rrs.getLimitStart(), rrs.getLimitSize(), true);
            // ctx.setSql(nativeSql);
            }
        }
        if (rrs.isDistTable()) {
            SQLTableSource from = mysqlSelectQuery.getFrom();
            for (RouteResultsetNode node : rrs.getNodes()) {
                SQLIdentifierExpr sqlIdentifierExpr = new SQLIdentifierExpr();
                sqlIdentifierExpr.setParent(from);
                sqlIdentifierExpr.setName(node.getSubTableName());
                SQLExprTableSource from2 = new SQLExprTableSource(sqlIdentifierExpr);
                from2.setAlias(from.getAlias());
                mysqlSelectQuery.setFrom(from2);
                node.setStatement(stmt.toString());
            }
        }
        rrs.setCacheAble(isNeedCache(schema, rrs, mysqlSelectQuery, allConditions));
    }
}

Example 12 with ColumnRoutePair

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

the class RouteCalculateUnit method addShardingExpr.

public void addShardingExpr(String tableName, String columnName, Object value) {
    Map<String, Set<ColumnRoutePair>> tableColumnsMap = tablesAndConditions.get(tableName);
    if (value == null) {
        // where a=null
        return;
    }
    if (tableColumnsMap == null) {
        tableColumnsMap = new LinkedHashMap<String, Set<ColumnRoutePair>>();
        tablesAndConditions.put(tableName, tableColumnsMap);
    }
    String uperColName = columnName.toUpperCase();
    Set<ColumnRoutePair> columValues = tableColumnsMap.get(uperColName);
    if (columValues == null) {
        columValues = new LinkedHashSet<ColumnRoutePair>();
        tablesAndConditions.get(tableName).put(uperColName, columValues);
    }
    if (value instanceof Object[]) {
        for (Object item : (Object[]) value) {
            if (item == null) {
                continue;
            }
            columValues.add(new ColumnRoutePair(item.toString()));
        }
    } else if (value instanceof RangeValue) {
        columValues.add(new ColumnRoutePair((RangeValue) value));
    } else {
        columValues.add(new ColumnRoutePair(value.toString()));
    }
}

Example 13 with ColumnRoutePair

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

the class RouterUtil method ruleCalculate.

/**
 * @return dataNodeIndex -> [partitionKeysValueTuple+]
 */
public static Set<String> ruleCalculate(TableConfig tc, Set<ColumnRoutePair> colRoutePairSet, Map<String, Integer> dataNodeSlotMap) {
    Set<String> routeNodeSet = new LinkedHashSet<String>();
    String col = tc.getRule().getColumn();
    RuleConfig rule = tc.getRule();
    AbstractPartitionAlgorithm algorithm = rule.getRuleAlgorithm();
    for (ColumnRoutePair colPair : colRoutePairSet) {
        if (colPair.colValue != null) {
            Integer nodeIndx = algorithm.calculate(colPair.colValue);
            if (nodeIndx == null) {
                throw new IllegalArgumentException("can't find datanode for sharding column:" + col + " val:" + colPair.colValue);
            } else {
                String dataNode = tc.getDataNodes().get(nodeIndx);
                routeNodeSet.add(dataNode);
                if (algorithm instanceof SlotFunction) {
                    dataNodeSlotMap.put(dataNode, ((SlotFunction) algorithm).slotValue());
                }
                colPair.setNodeId(nodeIndx);
            }
        } else if (colPair.rangeValue != null) {
            Integer[] nodeRange = algorithm.calculateRange(String.valueOf(colPair.rangeValue.beginValue), String.valueOf(colPair.rangeValue.endValue));
            if (nodeRange != null) {
                /**
                 * 不能确认 colPair的 nodeid是否会有其它影响
                 */
                if (nodeRange.length == 0) {
                    routeNodeSet.addAll(tc.getDataNodes());
                } else {
                    ArrayList<String> dataNodes = tc.getDataNodes();
                    String dataNode = null;
                    for (Integer nodeId : nodeRange) {
                        dataNode = dataNodes.get(nodeId);
                        if (algorithm instanceof SlotFunction) {
                            dataNodeSlotMap.put(dataNode, ((SlotFunction) algorithm).slotValue());
                        }
                        routeNodeSet.add(dataNode);
                    }
                }
            }
        }
    }
    return routeNodeSet;
}

Example 14 with ColumnRoutePair

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

the class RouterUtil method tryRouteForTables.

/**
 * 多表路由
 */
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) {
            // add 如果表读取不到则先将表名从别名中读取转化后再读取
            String alias = ctx.getTableAliasMap().get(tableName);
            if (!StringUtil.isEmpty(alias)) {
                tableConfig = schema.getTables().get(alias.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) {
        String tableName = tables.get(0);
        TableConfig tableConfig = schema.getTables().get(tableName.toUpperCase());
        if (tableConfig.isDistTable()) {
            routeToDistTableNode(tableName, schema, rrs, ctx.getSql(), tablesAndConditions, cachePool, isSelect);
            return rrs;
        }
        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;
}

Example 15 with ColumnRoutePair

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

the class RouterUtil method routeToDistTableNode.

private static RouteResultset routeToDistTableNode(String tableName, SchemaConfig schema, RouteResultset rrs, String orgSql, Map<String, Map<String, Set<ColumnRoutePair>>> tablesAndConditions, LayerCachePool cachePool, boolean isSelect) throws SQLNonTransientException {
    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.isGlobalTable()) {
        String msg = "can't suport district table  " + tableName + " schema:" + schema.getName() + " for global table ";
        LOGGER.warn(msg);
        throw new SQLNonTransientException(msg);
    }
    String partionCol = tableConfig.getPartitionColumn();
    // String primaryKey = tableConfig.getPrimaryKey();
    boolean isLoadData = false;
    Set<String> tablesRouteSet = new HashSet<String>();
    List<String> dataNodes = tableConfig.getDataNodes();
    if (dataNodes.size() > 1) {
        String msg = "can't suport district table  " + tableName + " schema:" + schema.getName() + " for mutiple dataNode " + dataNodes;
        LOGGER.warn(msg);
        throw new SQLNonTransientException(msg);
    }
    String dataNode = dataNodes.get(0);
    // 主键查找缓存暂时不实现
    if (tablesAndConditions.isEmpty()) {
        List<String> subTables = tableConfig.getDistTables();
        tablesRouteSet.addAll(subTables);
    }
    for (Map.Entry<String, Map<String, Set<ColumnRoutePair>>> entry : tablesAndConditions.entrySet()) {
        boolean isFoundPartitionValue = partionCol != null && entry.getValue().get(partionCol) != null;
        Map<String, Set<ColumnRoutePair>> columnsMap = entry.getValue();
        Set<ColumnRoutePair> partitionValue = columnsMap.get(partionCol);
        if (partitionValue == null || partitionValue.size() == 0) {
            tablesRouteSet.addAll(tableConfig.getDistTables());
        } else {
            for (ColumnRoutePair pair : partitionValue) {
                AbstractPartitionAlgorithm algorithm = tableConfig.getRule().getRuleAlgorithm();
                if (pair.colValue != null) {
                    Integer tableIndex = algorithm.calculate(pair.colValue);
                    if (tableIndex == null) {
                        String msg = "can't find any valid datanode :" + tableConfig.getName() + " -> " + tableConfig.getPartitionColumn() + " -> " + pair.colValue;
                        LOGGER.warn(msg);
                        throw new SQLNonTransientException(msg);
                    }
                    String subTable = tableConfig.getDistTables().get(tableIndex);
                    if (subTable != null) {
                        tablesRouteSet.add(subTable);
                        if (algorithm instanceof SlotFunction) {
                            rrs.getDataNodeSlotMap().put(subTable, ((SlotFunction) algorithm).slotValue());
                        }
                    }
                }
                if (pair.rangeValue != null) {
                    Integer[] tableIndexs = algorithm.calculateRange(pair.rangeValue.beginValue.toString(), pair.rangeValue.endValue.toString());
                    for (Integer idx : tableIndexs) {
                        String subTable = tableConfig.getDistTables().get(idx);
                        if (subTable != null) {
                            tablesRouteSet.add(subTable);
                            if (algorithm instanceof SlotFunction) {
                                rrs.getDataNodeSlotMap().put(subTable, ((SlotFunction) algorithm).slotValue());
                            }
                        }
                    }
                }
            }
        }
    }
    Object[] subTables = tablesRouteSet.toArray();
    RouteResultsetNode[] nodes = new RouteResultsetNode[subTables.length];
    Map<String, Integer> dataNodeSlotMap = rrs.getDataNodeSlotMap();
    for (int i = 0; i < nodes.length; i++) {
        String table = String.valueOf(subTables[i]);
        String changeSql = orgSql;
        // rrs.getStatement()
        nodes[i] = new RouteResultsetNode(dataNode, rrs.getSqlType(), changeSql);
        nodes[i].setSubTableName(table);
        nodes[i].setSource(rrs);
        if (rrs.getDataNodeSlotMap().containsKey(dataNode)) {
            nodes[i].setSlot(rrs.getDataNodeSlotMap().get(dataNode));
        }
        if (rrs.getCanRunInReadDB() != null) {
            nodes[i].setCanRunInReadDB(rrs.getCanRunInReadDB());
        }
        if (dataNodeSlotMap.containsKey(table)) {
            nodes[i].setSlot(dataNodeSlotMap.get(table));
        }
        if (rrs.getRunOnSlave() != null) {
            nodes[0].setRunOnSlave(rrs.getRunOnSlave());
        }
    }
    rrs.setNodes(nodes);
    rrs.setSubTables(tablesRouteSet);
    rrs.setFinishedRoute(true);
    return rrs;
}