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get_system_var.h
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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* Copyright (C) 2008 Sun Microsystems, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#pragma once
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#include <drizzled/function/func.h>
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#include <drizzled/lex_string.h>
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namespace
drizzled {
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Item* get_system_var(Session*, sql_var_t,
str_ref
name,
str_ref
component);
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/* A system variable */
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class
Item_func_get_system_var
:
public
Item_func
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{
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sys_var
*
var
;
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sql_var_t var_type;
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str_ref
component;
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public
:
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Item_func_get_system_var
(
sys_var
*var_arg, sql_var_t var_type_arg,
str_ref
component_arg,
const
char
*name_arg,
size_t
name_len_arg);
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bool
fix_fields(
Session
*session,
Item
**ref);
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/*
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Stubs for pure virtual methods. Should never be called: this
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item is always substituted with a constant in fix_fields().
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*/
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double
val_real
() { assert(0);
return
0.0; }
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int64_t
val_int
() { assert(0);
return
0; }
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String
*
val_str
(
String
*) { assert(0);
return
0; }
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void
fix_length_and_dec() { assert(0); }
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/* TODO: fix to support views */
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const
char
*func_name()
const
{
return
"get_system_var"
; }
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};
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}
/* namespace drizzled */
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drizzled::var
Definition:
var.h:25
drizzled::Session
Definition:
session.h:81
drizzled::Item_func_get_system_var::val_str
String * val_str(String *)
Definition:
get_system_var.h:46
drizzled::Item_func_get_system_var::val_int
int64_t val_int()
Definition:
get_system_var.h:45
drizzled::sys_var
Definition:
sys_var.h:78
drizzled::Item
Definition:
item.h:56
drizzled::Item_func
Definition:
func.h:37
drizzled::Item_func_get_system_var::val_real
double val_real()
Definition:
get_system_var.h:44
data_ref_basic
Definition:
data_ref.h:26
drizzled::Item_func_get_system_var
Definition:
get_system_var.h:31
drizzled::String
Definition:
sql_string.h:57
drizzled
function
get_system_var.h
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