Package org.apache.drill.exec.expr

Examples of org.apache.drill.exec.expr.ValueVectorWriteExpression


      }

      final MaterializedField outputField = MaterializedField.create(ne.getRef(), expr.getMajorType());
      ValueVector vector = TypeHelper.getNewVector(outputField, oContext.getAllocator());
      TypedFieldId id = container.add(vector);
      valueExprs[i] = new ValueVectorWriteExpression(id, expr, true);
    }

    if (collector.hasErrors()) {
      throw new SchemaChangeException("Failure while materializing expression. " + collector.toErrorString());
    }
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  private final MappingSet RECORD_KEYS = new MappingSet(GeneratorMapping.create("setupInterior", "outputRecordKeys", null, null));

  private void outputRecordKeys(ClassGenerator<StreamingAggregator> cg, TypedFieldId[] keyOutputIds, LogicalExpression[] keyExprs) {
    cg.setMappingSet(RECORD_KEYS);
    for (int i =0; i < keyExprs.length; i++) {
      HoldingContainer hc = cg.addExpr(new ValueVectorWriteExpression(keyOutputIds[i], keyExprs[i], true));
      cg.getBlock(BlockType.EVAL)._if(hc.getValue().eq(JExpr.lit(0)))._then()._return(JExpr.FALSE);
    }
    cg.getBlock(BlockType.EVAL)._return(JExpr.TRUE);
  }
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      logger.debug("Writing out expr {}", keyExprs[i]);
      cg.rotateBlock();
      cg.setMappingSet(RECORD_KEYS_PREV);
      HoldingContainer innerExpression = cg.addExpr(keyExprs[i], false);
      cg.setMappingSet(RECORD_KEYS_PREV_OUT);
      HoldingContainer outerExpression = cg.addExpr(new ValueVectorWriteExpression(keyOutputIds[i], new HoldingContainerExpression(innerExpression), true), false);
      cg.getBlock(BlockType.EVAL)._if(outerExpression.getValue().eq(JExpr.lit(0)))._then()._return(JExpr.FALSE);

    }
    cg.getBlock(BlockType.EVAL)._return(JExpr.TRUE);
  }
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    TypedFieldId outId = TypedFieldId.newBuilder() //
        .addId(1) //
        .finalType(Types.repeated(MinorType.MAP)) //
        .intermediateType(Types.repeated(MinorType.MAP)) //
        .build();
    ValueVectorWriteExpression e2 = new ValueVectorWriteExpression(outId, e, true);

    v.addExpr(e2,  g.getRoot());
    System.out.println(g.generateAndGet());
  }
View Full Code Here

              MaterializedField outputField = MaterializedField.create(name, expr.getMajorType());
              ValueVector vv = TypeHelper.getNewVector(outputField, oContext.getAllocator());
              allocationVectors.add(vv);
              TypedFieldId fid = container.add(vv);
              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);

        TransferPair tp = vvIn.getTransferPair(getRef(namedExpression));
        transfers.add(tp);
        container.add(tp.getTo());
        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);
      } else{
        // need to do evaluation.
        ValueVector vector = TypeHelper.getNewVector(outputField, oContext.getAllocator());
        allocationVectors.add(vector);
        TypedFieldId fid = container.add(vector);
        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.");
      }
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