Examples with MycatRelDatasourceSourceInfo io.mycat.calcite.MycatRelDatasourceSourceInfo used on opensource projects

Example 1 with MycatRelDatasourceSourceInfo

use of io.mycat.calcite.MycatRelDatasourceSourceInfo in project Mycat2 by MyCATApache.

the class ColocatedPlanner method checkColocatedPushDown.

public static Optional<PartitionGroup> checkColocatedPushDown(MycatDataContext context, Plan plan, DrdsSqlWithParams drdsSqlWithParams) {
    CodeExecuterContext codeExecuterContext = plan.getCodeExecuterContext();
    AsyncMycatDataContextImpl.SqlMycatDataContextImpl sqlMycatDataContext = new AsyncMycatDataContextImpl.SqlMycatDataContextImpl(context, codeExecuterContext, drdsSqlWithParams);
    Map<String, MycatRelDatasourceSourceInfo> relContext = codeExecuterContext.getRelContext();
    List<List<PartitionGroup>> lists = new ArrayList<>();
    for (MycatRelDatasourceSourceInfo mycatRelDatasourceSourceInfo : relContext.values()) {
        if (mycatRelDatasourceSourceInfo.getRelNode() instanceof MycatView) {
            MycatView mycatView = (MycatView) mycatRelDatasourceSourceInfo.getRelNode();
            if (mycatView.getDistribution().type() == Distribution.Type.SHARDING) {
                for (ShardingTable shardingTable : mycatView.getDistribution().getShardingTables()) {
                    if (shardingTable instanceof ShardingIndexTable) {
                        return Optional.empty();
                    }
                }
            }
            lists.add(sqlMycatDataContext.getPartition(mycatView.getDigest()).orElse(Collections.emptyList()));
        } else {
            return Optional.empty();
        }
    }
    // Colocated Push Down
    PartitionGroup result = null;
    for (List<PartitionGroup> list : lists) {
        if (list.size() == 1) {
            PartitionGroup each = list.get(0);
            if (result == null) {
                result = new PartitionGroup(each.getTargetName(), new HashMap<>(each.getMap()));
            } else if (result.getTargetName().equals(each.getTargetName())) {
                Map<String, Partition> eachMap = each.getMap();
                Map<String, Partition> resMap = result.getMap();
                for (Map.Entry<String, Partition> entry : eachMap.entrySet()) {
                    if (resMap.containsKey(entry.getKey())) {
                        // 已经存在的分区不一致,所以不匹配
                        Partition existed = resMap.get(entry.getKey());
                        if (!existed.getUniqueName().equals(entry.getValue().getUniqueName())) {
                            return Optional.empty();
                        }
                    } else {
                        resMap.put(entry.getKey(), entry.getValue());
                    }
                }
            } else {
                return Optional.empty();
            }
        } else {
            return Optional.empty();
        }
    }
    return Optional.ofNullable(result);
}

Example 2 with MycatRelDatasourceSourceInfo

use of io.mycat.calcite.MycatRelDatasourceSourceInfo in project Mycat2 by MyCATApache.

the class MycatViewPlan method execute.

@Override
public Observable<VectorSchemaRoot> execute(RootContext rootContext) {
    RootAllocator rootAllocator = new RootAllocator();
    NewMycatDataContext context = (NewMycatDataContext) rootContext.getContext();
    DrdsSqlWithParams drdsSql = context.getDrdsSql();
    MycatView view = (MycatView) mycatView;
    CopyMycatRowMetaData rowMetaData = new CopyMycatRowMetaData(new CalciteRowMetaData(view.getRowType().getFieldList()));
    MycatRelDatasourceSourceInfo mycatRelDatasourceSourceInfo = new MycatRelDatasourceSourceInfo(rowMetaData, view.getSQLTemplate(DrdsSql.isForUpdate(drdsSql.getParameterizedStatement())), view);
    SqlNode sqlTemplate = mycatRelDatasourceSourceInfo.getSqlTemplate();
    List<PartitionGroup> partitionGroups = AsyncMycatDataContextImpl.getSqlMap(Collections.emptyMap(), view, drdsSql, drdsSql.getHintDataNodeFilter());
    ImmutableMultimap<String, SqlString> stringSqlStringImmutableMultimap = view.apply(-1, sqlTemplate, partitionGroups, drdsSql.getParams());
    List<Observable<VectorSchemaRoot>> observableList = new ArrayList<>();
    for (Map.Entry<String, SqlString> entry : stringSqlStringImmutableMultimap.entries()) {
        String key = entry.getKey();
        SqlString sqlString = entry.getValue();
        observableList.add(Observable.create(emitter -> {
            Future<NewMycatConnection> connectionFuture = context.getConnection(context.getContext().resolveDatasourceTargetName(key));
            Future<Observable<VectorSchemaRoot>> observableFuture = connectionFuture.map(connection -> {
                Observable<VectorSchemaRoot> observable = connection.prepareQuery(sqlString.getSql(), MycatPreparedStatementUtil.extractParams(drdsSql.getParams(), sqlString.getDynamicParameters()), MycatRelDataType.getMycatRelType(MycatViewPlan.this.schema()), rootAllocator);
                return observable.doOnComplete(() -> context.recycleConnection(context.getContext().resolveDatasourceTargetName(key), Future.succeededFuture(connection)));
            });
            observableFuture.onFailure(event -> emitter.tryOnError(event));
            observableFuture.onSuccess(event -> {
                event = event.doOnComplete(() -> emitter.onComplete());
                event = event.doOnError(throwable -> emitter.tryOnError(throwable));
                event.forEach(vectorSchemaRoot -> emitter.onNext(vectorSchemaRoot));
            });
        }));
    }
    return Observable.fromIterable(observableList).flatMap(i -> i);
}