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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef DRIZZLED_FUNCTION_USER_VAR_AS_OUT_PARAM_H
#define DRIZZLED_FUNCTION_USER_VAR_AS_OUT_PARAM_H
#include <drizzled/function/func.h>
namespace drizzled
{
/*
This item represents user variable used as out parameter (e.g in LOAD DATA),
and it is supposed to be used only for this purprose. So it is simplified
a lot. Actually you should never obtain its value.
The only two reasons for this thing being an Item is possibility to store it
in List<Item> and desire to place this code somewhere near other functions
working with user variables.
*/
class Item_user_var_as_out_param :public Item
{
LEX_STRING name;
user_var_entry *entry;
public:
Item_user_var_as_out_param(LEX_STRING a) : name(a) {}
/* We should return something different from FIELD_ITEM here */
enum Type type() const { return STRING_ITEM;}
double val_real();
int64_t val_int();
String *val_str(String *str);
type::Decimal *val_decimal(type::Decimal *decimal_buffer);
/* fix_fields() binds variable name with its entry structure */
bool fix_fields(Session *session, Item **ref);
virtual void print(String *str, enum_query_type query_type);
void set_null_value(const CHARSET_INFO * const cs);
void set_value(const char *str, uint32_t length, const CHARSET_INFO * const cs);
};
} /* namespace drizzled */
#endif /* DRIZZLED_FUNCTION_USER_VAR_AS_OUT_PARAM_H */
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