Package org.apache.drill.common.expression

Examples of org.apache.drill.common.expression.LogicalExpression.accept()

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    ExprParser parser = new ExprParser(tokens);
    LogicalExpression e = parser.parse().e;
    RecordPointer r = new UnbackedRecord();
    r.addField(new SchemaPath("a", ExpressionPosition.UNKNOWN), new IntegerScalar(3));
    SimpleEvaluationVisitor builder = new SimpleEvaluationVisitor(r);
    BasicEvaluator eval = e.accept(builder, null);
    DataValue v = eval.eval();
    System.out.println(v);
  }
 
}
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    }

    private HoldingContainer visitValueVectorWriteExpression(ValueVectorWriteExpression e, CodeGenerator<?> generator) {

      LogicalExpression child = e.getChild();
      HoldingContainer inputContainer = child.accept(this, generator);
      JBlock block = generator.getEvalBlock();
      JExpression outIndex = generator.getMappingSet().getValueWriteIndex();
      JVar vv = generator.declareVectorValueSetupAndMember(generator.getMappingSet().getOutgoing(), e.getFieldId());
      String setMethod = e.isSafe() ? "setSafe" : "set";
     
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    }

    private HoldingContainer visitReturnValueExpression(ReturnValueExpression e, CodeGenerator<?> generator) {
      LogicalExpression child = e.getChild();
      // Preconditions.checkArgument(child.getMajorType().equals(Types.REQUIRED_BOOLEAN));
      HoldingContainer hc = child.accept(this, generator);
      if(e.isReturnTrueOnOne()){
        generator.getEvalBlock()._return(hc.getValue().eq(JExpr.lit(1))); 
      }else{
        generator.getEvalBlock()._return(hc.getValue());
      }
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    }

    private HoldingContainer visitValueVectorWriteExpression(ValueVectorWriteExpression e, ClassGenerator<?> generator) {

      final LogicalExpression child = e.getChild();
      final HoldingContainer inputContainer = child.accept(this, generator);
      final boolean complex = Types.isComplex(inputContainer.getMajorType());
      final boolean repeated = Types.isRepeated(inputContainer.getMajorType());

      JBlock block = generator.getEvalBlock();
      JExpression outIndex = generator.getMappingSet().getValueWriteIndex();
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    }

    private HoldingContainer visitReturnValueExpression(ReturnValueExpression e, ClassGenerator<?> generator) {
      LogicalExpression child = e.getChild();
      // Preconditions.checkArgument(child.getMajorType().equals(Types.REQUIRED_BOOLEAN));
      HoldingContainer hc = child.accept(this, generator);
      if (e.isReturnTrueOnOne()) {
        generator.getEvalBlock()._return(hc.getValue().eq(JExpr.lit(1)));
      } else {
        generator.getEvalBlock()._return(hc.getValue());
      }
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  public static LogicalExpression materialize(LogicalExpression expr, VectorAccessible batch, ErrorCollector errorCollector, FunctionImplementationRegistry registry,
      boolean allowComplexWriterExpr) {
    LogicalExpression out =  expr.accept(new MaterializeVisitor(batch, errorCollector, allowComplexWriterExpr), registry);
   
    if (!errorCollector.hasErrors()) {
      out = out.accept(ConditionalExprOptimizer.INSTANCE, null);
    }
   
    if(out instanceof NullExpression){
      return new TypedNullConstant(Types.optional(MinorType.INT));
    }else{
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  @Override
  public Boolean visitFunctionHolderExpression(FunctionHolderExpression holder, ErrorCollector errors) {
    if (holder.isAggregating()) {
      for (int i = 0; i < holder.args.size(); i++) {
        LogicalExpression e = holder.args.get(i);
        if(e.accept(this, errors)) {
          errors.addGeneralError(e.getPosition(),
            String.format("Aggregating function call %s includes nested aggregations at arguments number %d. " +
              "This isn't allowed.", holder.getName(), i));
        }
      }
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        }
      }
      return true;
    } else {
      for (LogicalExpression e : holder.args) {
        if (e.accept(this, errors)) {
          return true;
        }
      }
      return false;
    }
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  public static LogicalExpression materialize(LogicalExpression expr, VectorAccessible batch, ErrorCollector errorCollector, FunctionImplementationRegistry registry,
      boolean allowComplexWriterExpr) {
    LogicalExpression out =  expr.accept(new MaterializeVisitor(batch, errorCollector, allowComplexWriterExpr), registry);

    if (!errorCollector.hasErrors()) {
      out = out.accept(ConditionalExprOptimizer.INSTANCE, null);
    }

    if (out instanceof NullExpression) {
      return new TypedNullConstant(Types.optional(MinorType.INT));
    } else {
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    }

    private HoldingContainer visitValueVectorWriteExpression(ValueVectorWriteExpression e, ClassGenerator<?> generator) {

      final LogicalExpression child = e.getChild();
      final HoldingContainer inputContainer = child.accept(this, generator);

      JBlock block = generator.getEvalBlock();
      JExpression outIndex = generator.getMappingSet().getValueWriteIndex();
      JVar vv = generator.declareVectorValueSetupAndMember(generator.getMappingSet().getOutgoing(), e.getFieldId());
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