Examples with TransferPair org.apache.drill.exec.record.TransferPair used on opensource projects

Example 11 with TransferPair

use of org.apache.drill.exec.record.TransferPair in project drill by apache.

the class ProjectRecordBatch method setupNewSchema.

@Override
protected boolean setupNewSchema() throws SchemaChangeException {
    if (allocationVectors != null) {
        for (final ValueVector v : allocationVectors) {
            v.clear();
        }
    }
    this.allocationVectors = Lists.newArrayList();
    if (complexWriters != null) {
        container.clear();
    } else {
        container.zeroVectors();
    }
    final List<NamedExpression> exprs = getExpressionList();
    final ErrorCollector collector = new ErrorCollectorImpl();
    final List<TransferPair> transfers = Lists.newArrayList();
    final ClassGenerator<Projector> cg = CodeGenerator.getRoot(Projector.TEMPLATE_DEFINITION, context.getFunctionRegistry(), context.getOptions());
    cg.getCodeGenerator().plainJavaCapable(true);
    // Uncomment out this line to debug the generated code.
    //    cg.getCodeGenerator().saveCodeForDebugging(true);
    final IntHashSet transferFieldIds = new IntHashSet();
    final boolean isAnyWildcard = isAnyWildcard(exprs);
    final ClassifierResult result = new ClassifierResult();
    final boolean classify = isClassificationNeeded(exprs);
    for (int i = 0; i < exprs.size(); i++) {
        final NamedExpression namedExpression = exprs.get(i);
        result.clear();
        if (classify && namedExpression.getExpr() instanceof SchemaPath) {
            classifyExpr(namedExpression, incoming, result);
            if (result.isStar) {
                // The value indicates which wildcard we are processing now
                final Integer value = result.prefixMap.get(result.prefix);
                if (value != null && value.intValue() == 1) {
                    int k = 0;
                    for (final VectorWrapper<?> wrapper : incoming) {
                        final ValueVector vvIn = wrapper.getValueVector();
                        if (k > result.outputNames.size() - 1) {
                            assert false;
                        }
                        // get the renamed column names
                        final String name = result.outputNames.get(k++);
                        if (name == EMPTY_STRING) {
                            continue;
                        }
                        if (isImplicitFileColumn(vvIn)) {
                            continue;
                        }
                        final FieldReference ref = new FieldReference(name);
                        final ValueVector vvOut = container.addOrGet(MaterializedField.create(ref.getAsNamePart().getName(), vvIn.getField().getType()), callBack);
                        final TransferPair tp = vvIn.makeTransferPair(vvOut);
                        transfers.add(tp);
                    }
                } else if (value != null && value.intValue() > 1) {
                    // subsequent wildcards should do a copy of incoming valuevectors
                    int k = 0;
                    for (final VectorWrapper<?> wrapper : incoming) {
                        final ValueVector vvIn = wrapper.getValueVector();
                        final SchemaPath originalPath = SchemaPath.getSimplePath(vvIn.getField().getPath());
                        if (k > result.outputNames.size() - 1) {
                            assert false;
                        }
                        // get the renamed column names
                        final String name = result.outputNames.get(k++);
                        if (name == EMPTY_STRING) {
                            continue;
                        }
                        if (isImplicitFileColumn(vvIn)) {
                            continue;
                        }
                        final LogicalExpression expr = ExpressionTreeMaterializer.materialize(originalPath, incoming, collector, context.getFunctionRegistry());
                        if (collector.hasErrors()) {
                            throw new SchemaChangeException(String.format("Failure while trying to materialize incoming schema.  Errors:\n %s.", collector.toErrorString()));
                        }
                        final MaterializedField outputField = MaterializedField.create(name, expr.getMajorType());
                        final ValueVector vv = container.addOrGet(outputField, callBack);
                        allocationVectors.add(vv);
                        final TypedFieldId fid = container.getValueVectorId(SchemaPath.getSimplePath(outputField.getPath()));
                        final ValueVectorWriteExpression write = new ValueVectorWriteExpression(fid, expr, true);
                        final HoldingContainer hc = cg.addExpr(write, ClassGenerator.BlkCreateMode.TRUE_IF_BOUND);
                    }
                }
                continue;
            }
        } else {
            // For the columns which do not needed to be classified,
            // it is still necessary to ensure the output column name is unique
            result.outputNames = Lists.newArrayList();
            final String outputName = getRef(namedExpression).getRootSegment().getPath();
            addToResultMaps(outputName, result, true);
        }
        String outputName = getRef(namedExpression).getRootSegment().getPath();
        if (result != null && result.outputNames != null && result.outputNames.size() > 0) {
            boolean isMatched = false;
            for (int j = 0; j < result.outputNames.size(); j++) {
                if (!result.outputNames.get(j).equals(EMPTY_STRING)) {
                    outputName = result.outputNames.get(j);
                    isMatched = true;
                    break;
                }
            }
            if (!isMatched) {
                continue;
            }
        }
        final LogicalExpression expr = ExpressionTreeMaterializer.materialize(namedExpression.getExpr(), incoming, collector, context.getFunctionRegistry(), true, unionTypeEnabled);
        final MaterializedField outputField = MaterializedField.create(outputName, expr.getMajorType());
        if (collector.hasErrors()) {
            throw new SchemaChangeException(String.format("Failure while trying to materialize incoming schema.  Errors:\n %s.", collector.toErrorString()));
        }
        // add value vector to transfer if direct reference and this is allowed, otherwise, add to evaluation stack.
        if (expr instanceof ValueVectorReadExpression && incoming.getSchema().getSelectionVectorMode() == SelectionVectorMode.NONE && !((ValueVectorReadExpression) expr).hasReadPath() && !isAnyWildcard && !transferFieldIds.contains(((ValueVectorReadExpression) expr).getFieldId().getFieldIds()[0])) {
            final ValueVectorReadExpression vectorRead = (ValueVectorReadExpression) expr;
            final TypedFieldId id = vectorRead.getFieldId();
            final ValueVector vvIn = incoming.getValueAccessorById(id.getIntermediateClass(), id.getFieldIds()).getValueVector();
            Preconditions.checkNotNull(incoming);
            final FieldReference ref = getRef(namedExpression);
            final ValueVector vvOut = container.addOrGet(MaterializedField.create(ref.getAsUnescapedPath(), vectorRead.getMajorType()), callBack);
            final TransferPair tp = vvIn.makeTransferPair(vvOut);
            transfers.add(tp);
            transferFieldIds.add(vectorRead.getFieldId().getFieldIds()[0]);
        } else if (expr instanceof DrillFuncHolderExpr && ((DrillFuncHolderExpr) expr).getHolder().isComplexWriterFuncHolder()) {
            // Lazy initialization of the list of complex writers, if not done yet.
            if (complexWriters == null) {
                complexWriters = Lists.newArrayList();
            } else {
                complexWriters.clear();
            }
            // The reference name will be passed to ComplexWriter, used as the name of the output vector from the writer.
            ((DrillFuncHolderExpr) expr).getFieldReference(namedExpression.getRef());
            cg.addExpr(expr, ClassGenerator.BlkCreateMode.TRUE_IF_BOUND);
            if (complexFieldReferencesList == null) {
                complexFieldReferencesList = Lists.newArrayList();
            }
            // save the field reference for later for getting schema when input is empty
            complexFieldReferencesList.add(namedExpression.getRef());
        } else {
            // need to do evaluation.
            final ValueVector vector = container.addOrGet(outputField, callBack);
            allocationVectors.add(vector);
            final TypedFieldId fid = container.getValueVectorId(SchemaPath.getSimplePath(outputField.getPath()));
            final boolean useSetSafe = !(vector instanceof FixedWidthVector);
            final ValueVectorWriteExpression write = new ValueVectorWriteExpression(fid, expr, useSetSafe);
            final HoldingContainer hc = cg.addExpr(write, ClassGenerator.BlkCreateMode.TRUE_IF_BOUND);
            // We cannot do multiple transfers from the same vector. However we still need to instantiate the output vector.
            if (expr instanceof ValueVectorReadExpression) {
                final ValueVectorReadExpression vectorRead = (ValueVectorReadExpression) expr;
                if (!vectorRead.hasReadPath()) {
                    final TypedFieldId id = vectorRead.getFieldId();
                    final ValueVector vvIn = incoming.getValueAccessorById(id.getIntermediateClass(), id.getFieldIds()).getValueVector();
                    vvIn.makeTransferPair(vector);
                }
            }
            logger.debug("Added eval for project expression.");
        }
    }
    try {
        CodeGenerator<Projector> codeGen = cg.getCodeGenerator();
        codeGen.plainJavaCapable(true);
        // Uncomment out this line to debug the generated code.
        //      codeGen.saveCodeForDebugging(true);
        this.projector = context.getImplementationClass(codeGen);
        projector.setup(context, incoming, this, transfers);
    } catch (ClassTransformationException | IOException e) {
        throw new SchemaChangeException("Failure while attempting to load generated class", e);
    }
    if (container.isSchemaChanged()) {
        container.buildSchema(SelectionVectorMode.NONE);
        return true;
    } else {
        return false;
    }
}

Example 12 with TransferPair

use of org.apache.drill.exec.record.TransferPair in project drill by apache.

the class ProjectorTemplate method projectRecords.

@Override
public final int projectRecords(int startIndex, final int recordCount, int firstOutputIndex) {
    switch(svMode) {
        case FOUR_BYTE:
            throw new UnsupportedOperationException();
        case TWO_BYTE:
            final int count = recordCount;
            for (int i = 0; i < count; i++, firstOutputIndex++) {
                try {
                    doEval(vector2.getIndex(i), firstOutputIndex);
                } catch (SchemaChangeException e) {
                    throw new UnsupportedOperationException(e);
                }
            }
            return recordCount;
        case NONE:
            final int countN = recordCount;
            int i;
            for (i = startIndex; i < startIndex + countN; i++, firstOutputIndex++) {
                try {
                    doEval(i, firstOutputIndex);
                } catch (SchemaChangeException e) {
                    throw new UnsupportedOperationException(e);
                }
            }
            if (i < startIndex + recordCount || startIndex > 0) {
                for (TransferPair t : transfers) {
                    t.splitAndTransfer(startIndex, i - startIndex);
                }
                return i - startIndex;
            }
            for (TransferPair t : transfers) {
                t.transfer();
            }
            return recordCount;
        default:
            throw new UnsupportedOperationException();
    }
}

Example 13 with TransferPair

use of org.apache.drill.exec.record.TransferPair in project drill by apache.

the class WindowFrameRecordBatch method doWork.

private void doWork() throws DrillException {
    final WindowDataBatch current = batches.get(0);
    final int recordCount = current.getRecordCount();
    logger.trace("WindowFramer.doWork() START, num batches {}, current batch has {} rows", batches.size(), recordCount);
    // allocate outgoing vectors
    for (VectorWrapper<?> w : container) {
        w.getValueVector().allocateNew();
    }
    for (WindowFramer framer : framers) {
        framer.doWork();
    }
    // transfer "non aggregated" vectors
    for (VectorWrapper<?> vw : current) {
        ValueVector v = container.addOrGet(vw.getField());
        TransferPair tp = vw.getValueVector().makeTransferPair(v);
        tp.transfer();
    }
    container.setRecordCount(recordCount);
    for (VectorWrapper<?> v : container) {
        v.getValueVector().getMutator().setValueCount(recordCount);
    }
    // we can safely free the current batch
    current.clear();
    batches.remove(0);
    logger.trace("doWork() END");
}

Example 14 with TransferPair

use of org.apache.drill.exec.record.TransferPair in project drill by apache.

the class TraceRecordBatch method setupNewSchema.

@Override
protected boolean setupNewSchema() throws SchemaChangeException {
    /* Trace operator does not deal with hyper vectors yet */
    if (incoming.getSchema().getSelectionVectorMode() == SelectionVectorMode.FOUR_BYTE) {
        throw new SchemaChangeException("Trace operator does not work with hyper vectors");
    }
    /*
     * we have a new schema, clear our existing container to load the new value vectors
     */
    container.clear();
    /* Add all the value vectors in the container */
    for (VectorWrapper<?> vv : incoming) {
        TransferPair tp = vv.getValueVector().getTransferPair(oContext.getAllocator());
        container.add(tp.getTo());
    }
    container.buildSchema(incoming.getSchema().getSelectionVectorMode());
    return true;
}

Example 15 with TransferPair

use of org.apache.drill.exec.record.TransferPair in project drill by apache.

the class OrderedPartitionProjectorTemplate method projectRecords.

@Override
public final int projectRecords(final int recordCount, int firstOutputIndex) {
    final int countN = recordCount;
    int counter = 0;
    for (int i = 0; i < countN; i++, firstOutputIndex++) {
        int partition = getPartition(i);
        partitionValues.getMutator().setSafe(i, partition);
        counter++;
    }
    for (TransferPair t : transfers) {
        t.transfer();
    }
    return counter;
}