Пример #1
0
 public RelOptTableImpl getTable(final String[] names) {
   List<Pair<String, Object>> pairs = new ArrayList<Pair<String, Object>>();
   Schema schema2 = schema;
   for (int i = 0; i < names.length; i++) {
     final String name = names[i];
     Schema subSchema = schema2.getSubSchema(name);
     if (subSchema != null) {
       pairs.add(Pair.<String, Object>of(name, subSchema));
       schema2 = subSchema;
       continue;
     }
     final Table table = schema2.getTable(name);
     if (table != null) {
       pairs.add(Pair.<String, Object>of(name, table));
       if (i != names.length - 1) {
         // not enough objects to match all names
         return null;
       }
       return new RelOptTableImpl(
           this, typeFactory.createType(table.getElementType()), names, table);
     }
     return null;
   }
   return null;
 }
Пример #2
0
  private Expression translate0(RexNode expr) {
    if (expr instanceof RexInputRef) {
      // TODO: multiple inputs, e.g. joins
      final Expression input = getInput(0);
      final int index = ((RexInputRef) expr).getIndex();
      final List<RelDataTypeField> fields = program.getInputRowType().getFieldList();
      final RelDataTypeField field = fields.get(index);
      if (fields.size() == 1) {
        return input;
      } else if (input.getType() == Object[].class) {
        return Expressions.convert_(
            Expressions.arrayIndex(input, Expressions.constant(field.getIndex())),
            Types.box(JavaRules.EnumUtil.javaClass(typeFactory, field.getType())));
      } else {
        return Expressions.field(input, field.getName());
      }
    }
    if (expr instanceof RexLocalRef) {
      return translate(program.getExprList().get(((RexLocalRef) expr).getIndex()));
    }
    if (expr instanceof RexLiteral) {
      return Expressions.constant(
          ((RexLiteral) expr).getValue(), typeFactory.getJavaClass(expr.getType()));
    }
    if (expr instanceof RexCall) {
      final RexCall call = (RexCall) expr;
      final SqlOperator operator = call.getOperator();
      final ExpressionType expressionType = SQL_TO_LINQ_OPERATOR_MAP.get(operator);
      if (expressionType != null) {
        switch (operator.getSyntax()) {
          case Binary:
            return Expressions.makeBinary(
                expressionType, translate(call.getOperands()[0]), translate(call.getOperands()[1]));
          case Postfix:
          case Prefix:
            return Expressions.makeUnary(expressionType, translate(call.getOperands()[0]));
          default:
            throw new RuntimeException("unknown syntax " + operator.getSyntax());
        }
      }

      Method method = SQL_OP_TO_JAVA_METHOD_MAP.get(operator);
      if (method != null) {
        List<Expression> exprs = translateList(Arrays.asList(call.operands));
        return !Modifier.isStatic(method.getModifiers())
            ? Expressions.call(exprs.get(0), method, exprs.subList(1, exprs.size()))
            : Expressions.call(method, exprs);
      }

      switch (expr.getKind()) {
        default:
          throw new RuntimeException("cannot translate expression " + expr);
      }
    }
    throw new RuntimeException("cannot translate expression " + expr);
  }
Пример #3
0
 private SqlOperator toOp(String name, TableFunction fun) {
   List<RelDataType> argTypes = new ArrayList<RelDataType>();
   List<SqlTypeFamily> typeFamilies = new ArrayList<SqlTypeFamily>();
   Parameter p;
   for (net.hydromatic.optiq.Parameter o :
       (List<net.hydromatic.optiq.Parameter>) fun.getParameters()) {
     argTypes.add(o.getType());
     typeFamilies.add(SqlTypeFamily.ANY);
   }
   return new SqlFunction(
       name,
       SqlKind.OTHER_FUNCTION,
       new ExplicitReturnTypeInference(typeFactory.createType(fun.getElementType())),
       new ExplicitOperandTypeInference(argTypes.toArray(new RelDataType[argTypes.size()])),
       new FamilyOperandTypeChecker(
           typeFamilies.toArray(new SqlTypeFamily[typeFamilies.size()])),
       null);
 }