Package org.apache.drill.common.expression.parser

Examples of org.apache.drill.common.expression.parser.ExprParser

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        return null;
      try {
        // logger.debug("Parsing expression string '{}'", expr);
        ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        ExprParser parser = new ExprParser(tokens);

        //TODO: move functionregistry and error collector to injectables.
        //ctxt.findInjectableValue(valueId, forProperty, beanInstance)

        parser.setRegistry(new FunctionRegistry(config));
        parse_return ret = parser.parse();

        // ret.e.resolveAndValidate(expr, errorCollector);
        return ret.e;
      } catch (RecognitionException e) {
        throw new RuntimeException(e);
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  public static void main(String[] args) throws Exception {
    String expr = "if( a == 1) then 4 else 2 end";
    ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    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();
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  // HELPER METHODS //

  private LogicalExpression parseExpr(String expr) throws RecognitionException {
    ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    ExprParser parser = new ExprParser(tokens);
    parser.setRegistry(new FunctionRegistry(DrillConfig.create()));
    parse_return ret = parser.parse();
    return ret.e;
  }
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  // HELPER METHODS //

  private LogicalExpression parseExpr(String expr) throws RecognitionException {
    ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    ExprParser parser = new ExprParser(tokens);
    parse_return ret = parser.parse();
    return ret.e;
  }
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//    for(Token t : (List<Token>) tokens.getTokens()){
//      System.out.println(t + "" + t.getType());
//    }
//    tokens.rewind();

    ExprParser parser = new ExprParser(tokens);
    parse_return ret = parser.parse();

    return ret.e;

  }
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  // HELPER METHODS //

  private LogicalExpression parseExpr(String expr) throws RecognitionException {
    ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    ExprParser parser = new ExprParser(tokens);
    parse_return ret = parser.parse();
    return ret.e;
  }
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  }

  private LogicalExpression parseExpr(String expr) throws RecognitionException {
    ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    ExprParser parser = new ExprParser(tokens);
    ExprParser.parse_return ret = parser.parse();
    return ret.e;
  }
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      }
      try {
        // logger.debug("Parsing expression string '{}'", expr);
        ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        ExprParser parser = new ExprParser(tokens);

        //TODO: move functionregistry and error collector to injectables.
        //ctxt.findInjectableValue(valueId, forProperty, beanInstance)
        parse_return ret = parser.parse();

        // ret.e.resolveAndValidate(expr, errorCollector);
        if (ret.e instanceof SchemaPath) {
          return (SchemaPath) ret.e;
        } else {
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      }
      try {
        // logger.debug("Parsing expression string '{}'", expr);
        ExprLexer lexer = new ExprLexer(new ANTLRStringStream(expr));
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        ExprParser parser = new ExprParser(tokens);

        //TODO: move functionregistry and error collector to injectables.
        //ctxt.findInjectableValue(valueId, forProperty, beanInstance)
        parse_return ret = parser.parse();

        // ret.e.resolveAndValidate(expr, errorCollector);
        return ret.e;
      } catch (RecognitionException e) {
        throw new RuntimeException(e);
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//    for(Token t : (List<Token>) tokens.getTokens()){
//      System.out.println(t + "" + t.getType());
//    }
//    tokens.rewind();

    ExprParser parser = new ExprParser(tokens);
    parse_return ret = parser.parse();

    return ret.e;

  }
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Related Classes of org.apache.drill.common.expression.parser.ExprParser

  • org.apache.drill.common.expression.LogicalExpression$De
  • org.apache.drill.common.expression.SchemaPath$De
  • org.apache.drill.exec.compile.TestEvaluationVisitor
  • org.apache.drill.exec.expr.ExpressionInterpreterTest
  • org.apache.drill.exec.expr.ExpressionTest
  • org.apache.drill.exec.ref.eval.SimpleEvaluationVisitor
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