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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
*/
#include <config.h>
#include "elt.h"
namespace drizzled
{
void Item_func_elt::fix_length_and_dec()
{
max_length=0;
decimals=0;
if (agg_arg_charsets(collation, args+1, arg_count-1, MY_COLL_ALLOW_CONV, 1))
return;
for (uint32_t i= 1 ; i < arg_count ; i++)
{
set_if_bigger(max_length,args[i]->max_length);
set_if_bigger(decimals,args[i]->decimals);
}
maybe_null=1; // NULL if wrong first arg
}
double Item_func_elt::val_real()
{
assert(fixed == 1);
uint32_t tmp;
null_value=1;
if ((tmp=(uint) args[0]->val_int()) == 0 || tmp >= arg_count)
return 0.0;
double result= args[tmp]->val_real();
null_value= args[tmp]->null_value;
return result;
}
int64_t Item_func_elt::val_int()
{
assert(fixed == 1);
uint32_t tmp;
null_value=1;
if ((tmp=(uint) args[0]->val_int()) == 0 || tmp >= arg_count)
return 0;
int64_t result= args[tmp]->val_int();
null_value= args[tmp]->null_value;
return result;
}
String *Item_func_elt::val_str(String *str)
{
assert(fixed == 1);
uint32_t tmp;
null_value=1;
if ((tmp=(uint) args[0]->val_int()) == 0 || tmp >= arg_count)
return NULL;
String *result= args[tmp]->val_str(str);
if (result)
result->set_charset(collation.collation);
null_value= args[tmp]->null_value;
return result;
}
} /* namespace drizzled */
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