}
MaterializedField outputField = MaterializedField.create(name, expr.getMajorType());
ValueVector vv = container.addOrGet(outputField);
allocationVectors.add(vv);
TypedFieldId fid = container.getValueVectorId(outputField.getPath());
ValueVectorWriteExpression write = new ValueVectorWriteExpression(fid, expr, true);
HoldingContainer hc = cg.addExpr(write);
cg.getEvalBlock()._if(hc.getValue().eq(JExpr.lit(0)))._then()._return(JExpr.FALSE);
}
}
continue;
}
}
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);
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])) {
ValueVectorReadExpression vectorRead = (ValueVectorReadExpression) expr;
TypedFieldId id = vectorRead.getFieldId();
ValueVector vvIn = incoming.getValueAccessorById(id.getIntermediateClass(), id.getFieldIds()).getValueVector();
Preconditions.checkNotNull(incoming);
FieldReference ref = getRef(namedExpression);
ValueVector vvOut = container.addOrGet(MaterializedField.create(ref, vectorRead.getMajorType()));
TransferPair tp = vvIn.makeTransferPair(vvOut);
transfers.add(tp);
transferFieldIds.add(vectorRead.getFieldId().getFieldIds()[0]);
logger.debug("Added transfer for project expression.");
} else if (expr instanceof DrillFuncHolderExpr &&
((DrillFuncHolderExpr) expr).isComplexWriterFuncHolder()) {
// Need to process ComplexWriter function evaluation.
// 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.
((DrillComplexWriterFuncHolder) ((DrillFuncHolderExpr) expr).getHolder()).setReference(namedExpression.getRef());
cg.addExpr(expr);
if (buildingSchema) {
buildingSchema = false;
MaterializedField f = MaterializedField.create(outputField.getPath().getAsUnescapedPath(), Types.required(MinorType.MAP));
container.addOrGet(f);
}
} else{
// need to do evaluation.
ValueVector vector = container.addOrGet(outputField);
allocationVectors.add(vector);
TypedFieldId fid = container.getValueVectorId(outputField.getPath());
ValueVectorWriteExpression write = new ValueVectorWriteExpression(fid, expr, true);
HoldingContainer hc = cg.addExpr(write);
cg.getEvalBlock()._if(hc.getValue().eq(JExpr.lit(0)))._then()._return(JExpr.FALSE);
logger.debug("Added eval for project expression.");