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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 <drizzled/field.h>
#include <drizzled/item/null.h>
#include <drizzled/lex_string.h>
#include <drizzled/plugin/client.h>
namespace drizzled {
bool Item_null::eq(const Item *item, bool) const
{ return item->type() == type(); }
double Item_null::val_real()
{
// following assert is redundant, because fixed=1 assigned in constructor
assert(fixed == 1);
null_value=1;
return 0.0;
}
int64_t Item_null::val_int()
{
// following assert is redundant, because fixed=1 assigned in constructor
assert(fixed == 1);
null_value=1;
return 0;
}
/* ARGSUSED */
String *Item_null::val_str(String *)
{
// following assert is redundant, because fixed=1 assigned in constructor
assert(fixed == 1);
null_value=1;
return 0;
}
type::Decimal *Item_null::val_decimal(type::Decimal *)
{
return 0;
}
void Item_null::print(String *str)
{
str->append(STRING_WITH_LEN("NULL"));
}
Item *Item_null::safe_charset_converter(const charset_info_st * const tocs)
{
collation.set(tocs);
return this;
}
/**
Store null in field.
This is used on INSERT.
Allow NULL to be inserted in timestamp and auto_increment values.
@param field Field where we want to store NULL
@retval
0 ok
@retval
1 Field doesn't support NULL values and can't handle 'field = NULL'
*/
int Item_null::save_in_field(Field *field, bool no_conversions)
{
return set_field_to_null_with_conversions(field, no_conversions);
}
/**
Store null in field.
@param field Field where we want to store NULL
@retval
0 OK
@retval
1 Field doesn't support NULL values
*/
int Item_null::save_safe_in_field(Field *field)
{
return set_field_to_null(field);
}
/**
Pack data in buffer for sending.
*/
void Item_null::send(plugin::Client *client, String *)
{
client->store();
}
} /* namespace drizzled */
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