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rollup_const.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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namespace
drizzled
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{
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/*
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Objects of this class are used for ROLLUP queries to wrap up
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each constant item referred to in GROUP BY list.
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*/
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class
Item_func_rollup_const
:
public
Item_func
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{
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public
:
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Item_func_rollup_const
(
Item
*a) :
Item_func
(a)
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{
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name
= a->
name
;
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name_length
= a->
name_length
;
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}
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double
val_real
() {
return
args[0]->
val_real
(); }
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int64_t
val_int
() {
return
args[0]->
val_int
(); }
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String
*
val_str
(
String
*str) {
return
args[0]->
val_str
(str); }
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type::Decimal
*
val_decimal
(
type::Decimal
*dec) {
return
args[0]->
val_decimal
(dec); }
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const
char
*func_name()
const
{
return
"rollup_const"
; }
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bool
const_item
()
const
{
return
0; }
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Item_result result_type()
const
{
return
args[0]->result_type(); }
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void
fix_length_and_dec()
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{
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collation= args[0]->collation;
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max_length= args[0]->max_length;
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decimals=args[0]->decimals;
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/* The item could be a NULL constant. */
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null_value
= args[0]->
is_null
();
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}
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};
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}
/* namespace drizzled */
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drizzled
function
rollup_const.h
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