Esempio n. 1
0
 private static List<Expression> simpleList(BlockExpression expression) {
   Expression simple = Blocks.simple(expression);
   if (simple instanceof NewExpression) {
     NewExpression newExpression = (NewExpression) simple;
     return newExpression.arguments;
   } else {
     return Collections.singletonList(simple);
   }
 }
Esempio n. 2
0
    @Override
    protected PreparedExecution implement(
        RelDataType rowType,
        RelNode rootRel,
        SqlKind sqlKind,
        ClassDeclaration decl,
        Argument[] args) {
      RelDataType resultType = rootRel.getRowType();
      boolean isDml = sqlKind.belongsTo(SqlKind.DML);
      javaCompiler = createCompiler();
      EnumerableRelImplementor relImplementor =
          getRelImplementor(rootRel.getCluster().getRexBuilder());
      BlockExpression expr = relImplementor.implementRoot((EnumerableRel) rootRel);
      ParameterExpression root0 = Expressions.parameter(DataContext.class, "root0");
      String s =
          Expressions.toString(
              Blocks.create(
                  Expressions.declare(
                      Modifier.FINAL, (ParameterExpression) schema.getExpression(), root0),
                  expr),
              false);

      final Executable executable;
      try {
        executable =
            (Executable)
                ExpressionEvaluator.createFastScriptEvaluator(
                    s, Executable.class, new String[] {root0.name});
      } catch (Exception e) {
        throw Helper.INSTANCE.wrap("Error while compiling generated Java code:\n" + s, e);
      }

      if (timingTracer != null) {
        timingTracer.traceTime("end codegen");
      }

      if (timingTracer != null) {
        timingTracer.traceTime("end compilation");
      }

      return new PreparedExecution(
          null, rootRel, resultType, isDml, mapTableModOp(isDml, sqlKind), null) {
        public Object execute() {
          return executable.execute(schema);
        }
      };
    }
Esempio n. 3
0
 public RexNode toRex(BlockExpression expression) {
   return toRex(Blocks.simple(expression));
 }