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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
*/
#pragma once
#include <drizzled/function/func.h>
#include <drizzled/lex_string.h>
namespace drizzled {
class Item_func_get_user_var :public Item_func
{
user_var_entry *var_entry;
Item_result m_cached_result_type;
Session &session;
public:
lex_string_t name; // keep it public
Item_func_get_user_var(Session &session_arg, lex_string_t a):
Item_func(),
m_cached_result_type(STRING_RESULT),
session(session_arg),
name(a)
{}
enum Functype functype() const { return GUSERVAR_FUNC; }
lex_string_t get_name() { return name; }
double val_real();
int64_t val_int();
type::Decimal *val_decimal(type::Decimal*);
String *val_str(String* str);
void fix_length_and_dec();
virtual void print(String *str);
enum Item_result result_type() const;
/*
We must always return variables as strings to guard against selects of type
select @t1:=1,@t1,@t:="hello",@t from foo where (@t1:= t2.b)
*/
const char *func_name() const { return "get_user_var"; }
bool const_item() const;
table_map used_tables() const
{ return const_item() ? 0 : RAND_TABLE_BIT; }
bool eq(const Item *item, bool binary_cmp) const;
};
} /* namespace drizzled */
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