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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
*
* 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_SET_USER_VAR_H
#define DRIZZLED_FUNCTION_SET_USER_VAR_H
#include <drizzled/function/func.h>
/* Handling of user definable variables */
class user_var_entry;
class Item_func_set_user_var :public Item_func
{
enum Item_result cached_result_type;
user_var_entry *entry;
char buffer[MAX_FIELD_WIDTH];
String value;
my_decimal decimal_buff;
bool null_item;
union
{
int64_t vint;
double vreal;
String *vstr;
my_decimal *vdec;
} save_result;
public:
LEX_STRING name; // keep it public
Item_func_set_user_var(LEX_STRING a,Item *b)
:Item_func(b), cached_result_type(INT_RESULT), name(a)
{}
enum Functype functype() const { return SUSERVAR_FUNC; }
double val_real();
int64_t val_int();
String *val_str(String *str);
my_decimal *val_decimal(my_decimal *);
double val_result();
int64_t val_int_result();
String *str_result(String *str);
my_decimal *val_decimal_result(my_decimal *);
bool update_hash(void *ptr, uint32_t length, enum Item_result type,
const CHARSET_INFO * const cs, Derivation dv, bool unsigned_arg);
bool send(Protocol *protocol, String *str_arg);
void make_field(SendField *tmp_field);
bool check(bool use_result_field);
bool update();
enum Item_result result_type () const { return cached_result_type; }
bool fix_fields(Session *session, Item **ref);
void fix_length_and_dec();
virtual void print(String *str, enum_query_type query_type);
void print_as_stmt(String *str, enum_query_type query_type);
const char *func_name() const { return "set_user_var"; }
int save_in_field(Field *field, bool no_conversions,
bool can_use_result_field);
int save_in_field(Field *field, bool no_conversions)
{
return save_in_field(field, no_conversions, 1);
}
void save_org_in_field(Field *field) { (void)save_in_field(field, 1, 0); }
bool register_field_in_read_map(unsigned char *arg);
};
#endif /* DRIZZLED_FUNCTION_SET_USER_VAR_H */
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