Пример #1
0
 /**
  * Internal method to create a call to a literal. Code outside this package should call one of the
  * type-specific methods such as {@link #makeDateLiteral(Calendar)}, {@link
  * #makeLiteral(boolean)}, {@link #makeLiteral(String)}.
  *
  * @param o Value of literal, must be appropriate for the type
  * @param type Type of literal
  * @param typeName SQL type of literal
  * @return Literal
  */
 protected RexLiteral makeLiteral(Comparable o, RelDataType type, SqlTypeName typeName) {
   // All literals except NULL have NOT NULL types.
   type = typeFactory.createTypeWithNullability(type, o == null);
   if (typeName == SqlTypeName.CHAR) {
     // Character literals must have a charset and collation. Populate
     // from the type if necessary.
     assert o instanceof NlsString;
     NlsString nlsString = (NlsString) o;
     if ((nlsString.getCollation() == null) || (nlsString.getCharset() == null)) {
       assert type.getSqlTypeName() == SqlTypeName.CHAR;
       assert type.getCharset().name() != null;
       assert type.getCollation() != null;
       o = new NlsString(nlsString.getValue(), type.getCharset().name(), type.getCollation());
     }
   }
   return new RexLiteral(o, type, typeName);
 }
Пример #2
0
  public RelDataType createSqlType(RelDataTypeFactory typeFactory) {
    BitString bitString;
    switch (typeName) {
      case NULL:
      case BOOLEAN:
        RelDataType ret = typeFactory.createSqlType(typeName);
        ret = typeFactory.createTypeWithNullability(ret, null == value);
        return ret;
      case BINARY:
        bitString = (BitString) value;
        int bitCount = bitString.getBitCount();
        return typeFactory.createSqlType(SqlTypeName.BINARY, bitCount / 8);
      case CHAR:
        NlsString string = (NlsString) value;
        Charset charset = string.getCharset();
        if (null == charset) {
          charset = typeFactory.getDefaultCharset();
        }
        SqlCollation collation = string.getCollation();
        if (null == collation) {
          collation = SqlCollation.COERCIBLE;
        }
        RelDataType type = typeFactory.createSqlType(SqlTypeName.CHAR, string.getValue().length());
        type = typeFactory.createTypeWithCharsetAndCollation(type, charset, collation);
        return type;

      case INTERVAL_YEAR_MONTH:
      case INTERVAL_DAY_TIME:
        SqlIntervalLiteral.IntervalValue intervalValue = (SqlIntervalLiteral.IntervalValue) value;
        return typeFactory.createSqlIntervalType(intervalValue.getIntervalQualifier());

      case SYMBOL:
        return typeFactory.createSqlType(SqlTypeName.SYMBOL);

      case INTEGER: // handled in derived class
      case TIME: // handled in derived class
      case VARCHAR: // should never happen
      case VARBINARY: // should never happen

      default:
        throw Util.needToImplement(toString() + ", operand=" + value);
    }
  }