Examples with PageSourceOperator com.facebook.presto.operator.PageSourceOperator used on opensource projects

Example 1 with PageSourceOperator

use of com.facebook.presto.operator.PageSourceOperator in project presto by prestodb.

the class IndexSourceOperator method addSplit.

@Override
public Supplier<Optional<UpdatablePageSource>> addSplit(Split split) {
    requireNonNull(split, "split is null");
    checkState(source == null, "Index source split already set");
    IndexSplit indexSplit = (IndexSplit) split.getConnectorSplit();
    // Normalize the incoming RecordSet to something that can be consumed by the index
    RecordSet normalizedRecordSet = probeKeyNormalizer.apply(indexSplit.getKeyRecordSet());
    ConnectorPageSource result = index.lookup(normalizedRecordSet);
    source = new PageSourceOperator(result, types, operatorContext);
    Object splitInfo = split.getInfo();
    if (splitInfo != null) {
        operatorContext.setInfoSupplier(() -> new SplitOperatorInfo(splitInfo));
    }
    return Optional::empty;
}

Example 2 with PageSourceOperator

use of com.facebook.presto.operator.PageSourceOperator in project presto by prestodb.

the class LocalQueryRunner method createTableScanOperator.

public OperatorFactory createTableScanOperator(Session session, int operatorId, PlanNodeId planNodeId, String tableName, String... columnNames) {
    checkArgument(session.getCatalog().isPresent(), "catalog not set");
    checkArgument(session.getSchema().isPresent(), "schema not set");
    // look up the table
    QualifiedObjectName qualifiedTableName = new QualifiedObjectName(session.getCatalog().get(), session.getSchema().get(), tableName);
    TableHandle tableHandle = metadata.getTableHandle(session, qualifiedTableName).orElse(null);
    checkArgument(tableHandle != null, "Table %s does not exist", qualifiedTableName);
    // lookup the columns
    Map<String, ColumnHandle> allColumnHandles = metadata.getColumnHandles(session, tableHandle);
    ImmutableList.Builder<ColumnHandle> columnHandlesBuilder = ImmutableList.builder();
    ImmutableList.Builder<Type> columnTypesBuilder = ImmutableList.builder();
    for (String columnName : columnNames) {
        ColumnHandle columnHandle = allColumnHandles.get(columnName);
        checkArgument(columnHandle != null, "Table %s does not have a column %s", tableName, columnName);
        columnHandlesBuilder.add(columnHandle);
        ColumnMetadata columnMetadata = metadata.getColumnMetadata(session, tableHandle, columnHandle);
        columnTypesBuilder.add(columnMetadata.getType());
    }
    List<ColumnHandle> columnHandles = columnHandlesBuilder.build();
    List<Type> columnTypes = columnTypesBuilder.build();
    // get the split for this table
    List<TableLayoutResult> layouts = metadata.getLayouts(session, tableHandle, Constraint.alwaysTrue(), Optional.empty());
    Split split = getLocalQuerySplit(session, layouts.get(0).getLayout().getHandle());
    return new OperatorFactory() {

        @Override
        public List<Type> getTypes() {
            return columnTypes;
        }

        @Override
        public Operator createOperator(DriverContext driverContext) {
            OperatorContext operatorContext = driverContext.addOperatorContext(operatorId, planNodeId, "BenchmarkSource");
            ConnectorPageSource pageSource = pageSourceManager.createPageSource(session, split, columnHandles);
            return new PageSourceOperator(pageSource, columnTypes, operatorContext);
        }

        @Override
        public void close() {
        }

        @Override
        public OperatorFactory duplicate() {
            throw new UnsupportedOperationException();
        }
    };
}