Package org.apache.drill.common.expression

Examples of org.apache.drill.common.expression.FieldReference

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    ErrorCollector ec = new ErrorCollectorImpl();


    LogicalExpression elseExpression = new IfExpression.Builder().setElse(new ValueExpressions.LongExpression(1L, ExpressionPosition.UNKNOWN))
        .setIfCondition(new IfExpression.IfCondition(new ValueExpressions.BooleanExpression("true", ExpressionPosition.UNKNOWN),
            new FieldReference("test1", ExpressionPosition.UNKNOWN)))
        .build();

    LogicalExpression expr = new IfExpression.Builder()
        .setIfCondition(new IfExpression.IfCondition(new FieldReference("test", ExpressionPosition.UNKNOWN), new ValueExpressions.LongExpression(2L, ExpressionPosition.UNKNOWN)))
        .setElse(elseExpression).build();

    LogicalExpression newExpr = ExpressionTreeMaterializer.materialize(expr, batch, ec, registry);
    assertTrue(newExpr instanceof IfExpression);
    IfExpression newIfExpr = (IfExpression) newExpr;
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      }
    };


    LogicalExpression functionCallExpr = new FunctionCall("testFunc",
      ImmutableList.of((LogicalExpression) new FieldReference("test", ExpressionPosition.UNKNOWN) ),
      ExpressionPosition.UNKNOWN);
    LogicalExpression newExpr = ExpressionTreeMaterializer.materialize(functionCallExpr, batch, ec, registry);
    assertTrue(newExpr instanceof TypedNullConstant);
    assertEquals(1, ec.getErrorCount());
    System.out.println(ec.toErrorString());
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    List<Ordering> orderDefs = Lists.newArrayList();
    int i = 0;
    for (Ordering od : popConfig.getOrderings()) {
      SchemaPath sp = SchemaPath.getSimplePath("f" + i++);
      orderDefs.add(new Ordering(od.getDirection(), new FieldReference(sp)));
    }

    // sort the data incoming samples.
    SelectionVector4 newSv4 = containerBuilder.getSv4();
    Sorter sorter = SortBatch.createNewSorter(context, orderDefs, allSamplesContainer);
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    builder.setInput(implementor.visitChild(this, 0, getChild()));
   
    final List<String> childFields = getChild().getRowType().getFieldNames();
    for(RelFieldCollation fieldCollation : this.collation.getFieldCollations()){
      builder.addOrdering(fieldCollation.getDirection(),
          new FieldReference(childFields.get(fieldCollation.getFieldIndex())),
          fieldCollation.nullDirection);
    }
    return builder.build();
  }
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  protected void createKeysAndExprs() {
    final List<String> childFields = getChild().getRowType().getFieldNames();
    final List<String> fields = getRowType().getFieldNames();

    for (int group : BitSets.toIter(groupSet)) {
      FieldReference fr = new FieldReference(childFields.get(group), ExpressionPosition.UNKNOWN);
      keys.add(new NamedExpression(fr, fr));
    }

    for (Ord<AggregateCall> aggCall : Ord.zip(aggCalls)) {
      int aggExprOrdinal = groupSet.cardinality() + aggCall.i;
      FieldReference ref = new FieldReference(fields.get(aggExprOrdinal));
      LogicalExpression expr = toDrill(aggCall.e, childFields, new DrillParseContext());
      NamedExpression ne = new NamedExpression(expr, ref);
      aggExprs.add(ne);

      if (getOperatorPhase() == OperatorPhase.PHASE_1of2) {
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  }

  protected LogicalExpression toDrill(AggregateCall call, List<String> fn, DrillParseContext pContext) {
    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 );
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        NamedExpression rightExpr[] = new NamedExpression[conditionsSize];
        NamedExpression leftExpr[] = new NamedExpression[conditionsSize];

        // Create named expressions from the conditions
        for (int i = 0; i < conditionsSize; i++) {
            rightExpr[i] = new NamedExpression(conditions.get(i).getRight(), new FieldReference("build_side_" + i ));
            leftExpr[i] = new NamedExpression(conditions.get(i).getLeft(), new FieldReference("probe_side_" + i));

            // Hash join only supports equality currently.
            assert conditions.get(i).getRelationship().equals("==");
        }
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    builder.setInput(implementor.visitChild(this, 0, getChild()));
    final List<String> childFields = getChild().getRowType().getFieldNames();
    final List<String> fields = getRowType().getFieldNames();

    for (int group : BitSets.toIter(groupSet)) {
      FieldReference fr = new FieldReference(childFields.get(group), ExpressionPosition.UNKNOWN);
      builder.addKey(fr, fr);
    }
   
    for (Ord<AggregateCall> aggCall : Ord.zip(aggCalls)) {
      FieldReference ref = new FieldReference(fields.get(groupSet.cardinality() + aggCall.i));
      LogicalExpression expr = toDrill(aggCall.e, childFields, implementor);
      builder.addExpr(ref, expr);
    }
   
    return builder.build();
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  private LogicalExpression toDrill(AggregateCall call, List<String> fn, DrillImplementor implementor) {
    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 = FunctionCallFactory.createExpression(call.getAggregation().getName().toLowerCase(), ExpressionPosition.UNKNOWN, args);
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    materializedValueFields = new MaterializedField[valueFieldIds.size()];

    if (valueFieldIds.size() > 0) {
      int i = 0;
      FieldReference ref = new FieldReference("dummy", ExpressionPosition.UNKNOWN, valueFieldIds.get(0).getIntermediateType());
      for (TypedFieldId id : valueFieldIds) {
        materializedValueFields[i++] = MaterializedField.create(ref, id.getIntermediateType());
      }
    }
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