Examples with FieldReference org.apache.drill.common.expression.FieldReference used on opensource projects

Example 6 with FieldReference

use of org.apache.drill.common.expression.FieldReference in project drill by apache.

the class FlattenRecordBatch method setupNewSchema.

@Override
protected boolean setupNewSchema() throws SchemaChangeException {
    this.allocationVectors = Lists.newArrayList();
    container.clear();
    final List<NamedExpression> exprs = getExpressionList();
    final ErrorCollector collector = new ErrorCollectorImpl();
    final List<TransferPair> transfers = Lists.newArrayList();
    final ClassGenerator<Flattener> cg = CodeGenerator.getRoot(Flattener.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 NamedExpression flattenExpr = new NamedExpression(popConfig.getColumn(), new FieldReference(popConfig.getColumn()));
    final ValueVectorReadExpression vectorRead = (ValueVectorReadExpression) ExpressionTreeMaterializer.materialize(flattenExpr.getExpr(), incoming, collector, context.getFunctionRegistry(), true);
    final FieldReference fieldReference = flattenExpr.getRef();
    final TransferPair transferPair = getFlattenFieldTransferPair(fieldReference);
    if (transferPair != null) {
        final ValueVector flattenVector = transferPair.getTo();
        // checks that list has only default ValueVector and replaces resulting ValueVector to INT typed ValueVector
        if (exprs.size() == 0 && flattenVector.getField().getType().equals(Types.LATE_BIND_TYPE)) {
            final MaterializedField outputField = MaterializedField.create(fieldReference.getAsNamePart().getName(), Types.OPTIONAL_INT);
            final ValueVector vector = TypeHelper.getNewVector(outputField, oContext.getAllocator());
            container.add(vector);
        } else {
            transfers.add(transferPair);
            container.add(flattenVector);
            transferFieldIds.add(vectorRead.getFieldId().getFieldIds()[0]);
        }
    }
    logger.debug("Added transfer for project expression.");
    ClassifierResult result = new ClassifierResult();
    for (int i = 0; i < exprs.size(); i++) {
        final NamedExpression namedExpression = exprs.get(i);
        result.clear();
        String outputName = getRef(namedExpression).getRootSegment().getPath();
        if (result != null && result.outputNames != null && result.outputNames.size() > 0) {
            for (int j = 0; j < result.outputNames.size(); j++) {
                if (!result.outputNames.get(j).equals(EMPTY_STRING)) {
                    outputName = result.outputNames.get(j);
                    break;
                }
            }
        }
        final LogicalExpression expr = ExpressionTreeMaterializer.materialize(namedExpression.getExpr(), incoming, collector, context.getFunctionRegistry(), true);
        if (collector.hasErrors()) {
            throw new SchemaChangeException(String.format("Failure while trying to materialize incoming schema.  Errors:\n %s.", collector.toErrorString()));
        }
        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();
            }
            // 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);
        } else {
            // need to do evaluation.
            final MaterializedField outputField;
            if (expr instanceof ValueVectorReadExpression) {
                final TypedFieldId id = ValueVectorReadExpression.class.cast(expr).getFieldId();
                @SuppressWarnings("resource") final ValueVector incomingVector = incoming.getValueAccessorById(id.getIntermediateClass(), id.getFieldIds()).getValueVector();
                // when the first batch will be empty.
                if (incomingVector != null) {
                    outputField = incomingVector.getField().clone();
                } else {
                    outputField = MaterializedField.create(outputName, expr.getMajorType());
                }
            } else {
                outputField = MaterializedField.create(outputName, expr.getMajorType());
            }
            @SuppressWarnings("resource") final ValueVector vector = TypeHelper.getNewVector(outputField, oContext.getAllocator());
            allocationVectors.add(vector);
            TypedFieldId fid = container.add(vector);
            ValueVectorWriteExpression write = new ValueVectorWriteExpression(fid, expr, true);
            cg.addExpr(write);
            logger.debug("Added eval for project expression.");
        }
    }
    cg.rotateBlock();
    cg.getEvalBlock()._return(JExpr.TRUE);
    container.buildSchema(SelectionVectorMode.NONE);
    try {
        this.flattener = context.getImplementationClass(cg.getCodeGenerator());
        flattener.setup(context, incoming, this, transfers);
    } catch (ClassTransformationException | IOException e) {
        throw new SchemaChangeException("Failure while attempting to load generated class", e);
    }
    return true;
}

Example 7 with FieldReference

use of org.apache.drill.common.expression.FieldReference in project drill by apache.

the class DrillWindowRel method toDrill.

protected LogicalExpression toDrill(AggregateCall call, List<String> fn) {
    List<LogicalExpression> args = Lists.newArrayList();
    for (Integer i : call.getArgList()) {
        args.add(new FieldReference(fn.get(i)));
    }
    // for count(1).
    if (args.isEmpty()) {
        args.add(new ValueExpressions.LongExpression(1l));
    }
    LogicalExpression expr = new FunctionCall(call.getAggregation().getName().toLowerCase(), args, ExpressionPosition.UNKNOWN);
    return expr;
}

Example 8 with FieldReference

use of org.apache.drill.common.expression.FieldReference in project drill by apache.

the class AggPrelBase method createKeysAndExprs.

protected void createKeysAndExprs() {
    final List<String> childFields = getInput().getRowType().getFieldNames();
    final List<String> fields = getRowType().getFieldNames();
    for (int group : BitSets.toIter(groupSet)) {
        FieldReference fr = FieldReference.getWithQuotedRef(childFields.get(group));
        keys.add(new NamedExpression(fr, fr));
    }
    for (Ord<AggregateCall> aggCall : Ord.zip(aggCalls)) {
        int aggExprOrdinal = groupSet.cardinality() + aggCall.i;
        FieldReference ref = FieldReference.getWithQuotedRef(fields.get(aggExprOrdinal));
        LogicalExpression expr = toDrill(aggCall.e, childFields);
        NamedExpression ne = new NamedExpression(expr, ref);
        aggExprs.add(ne);
        if (getOperatorPhase() == OperatorPhase.PHASE_1of2) {
            if (aggCall.e.getAggregation().getName().equals("COUNT")) {
                // If we are doing a COUNT aggregate in Phase1of2, then in Phase2of2 we should SUM the COUNTs,
                SqlAggFunction sumAggFun = new SqlSumCountAggFunction(aggCall.e.getType());
                AggregateCall newAggCall = new AggregateCall(sumAggFun, aggCall.e.isDistinct(), Collections.singletonList(aggExprOrdinal), aggCall.e.getType(), aggCall.e.getName());
                phase2AggCallList.add(newAggCall);
            } else {
                AggregateCall newAggCall = new AggregateCall(aggCall.e.getAggregation(), aggCall.e.isDistinct(), Collections.singletonList(aggExprOrdinal), aggCall.e.getType(), aggCall.e.getName());
                phase2AggCallList.add(newAggCall);
            }
        }
    }
}

Example 9 with FieldReference

use of org.apache.drill.common.expression.FieldReference in project drill by apache.

the class DrillSortRel method implement.

@Override
public LogicalOperator implement(DrillImplementor implementor) {
    final Order.Builder builder = Order.builder();
    builder.setInput(implementor.visitChild(this, 0, getInput()));
    final List<String> childFields = getInput().getRowType().getFieldNames();
    for (RelFieldCollation fieldCollation : this.collation.getFieldCollations()) {
        builder.addOrdering(fieldCollation.getDirection(), new FieldReference(childFields.get(fieldCollation.getFieldIndex())), fieldCollation.nullDirection);
    }
    return builder.build();
}

Example 10 with FieldReference

use of org.apache.drill.common.expression.FieldReference in project drill by apache.

the class PhysicalOpUnitTestBase method parseExprs.

protected List<NamedExpression> parseExprs(String... expressionsAndOutputNames) {
    Preconditions.checkArgument(expressionsAndOutputNames.length % 2 == 0, "List of expressions and output field names" + " is not complete, each expression must explicitly give and output name,");
    List<NamedExpression> ret = new ArrayList<>();
    for (int i = 0; i < expressionsAndOutputNames.length; i += 2) {
        ret.add(new NamedExpression(parseExpr(expressionsAndOutputNames[i]), new FieldReference(new SchemaPath(new PathSegment.NameSegment(expressionsAndOutputNames[i + 1])))));
    }
    return ret;
}