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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/error.h>
#include <drizzled/name_resolution_context.h>
#include <drizzled/table.h>
#include <drizzled/item/insert_value.h>
#include <drizzled/item/ref.h>
#include <drizzled/item/copy_string.h>
#include <drizzled/item/default_value.h>
#include <drizzled/field/null.h>
namespace drizzled
{
bool Item_insert_value::eq(const Item *item, bool binary_cmp) const
{
return item->type() == INSERT_VALUE_ITEM &&
((Item_default_value *)item)->arg->eq(arg, binary_cmp);
}
bool Item_insert_value::fix_fields(Session *session, Item **)
{
assert(fixed == 0);
/* We should only check that arg is in first table */
if (!arg->fixed)
{
bool res;
TableList *orig_next_table= context->last_name_resolution_table;
context->last_name_resolution_table= context->first_name_resolution_table;
res= arg->fix_fields(session, &arg);
context->last_name_resolution_table= orig_next_table;
if (res)
return true;
}
if (arg->type() == REF_ITEM)
{
Item_ref *ref= (Item_ref *)arg;
if (ref->ref[0]->type() != FIELD_ITEM)
{
my_error(ER_BAD_FIELD_ERROR, MYF(0), "", "VALUES() function");
return true;
}
arg= ref->ref[0];
}
/*
According to our SQL grammar, VALUES() function can reference
only to a column.
*/
assert(arg->type() == FIELD_ITEM);
Item_field *field_arg= (Item_field *)arg;
if (field_arg->field->getTable()->insert_values.size())
{
Field *def_field= (Field*) memory::sql_alloc(field_arg->field->size_of());
if (!def_field)
return true;
memcpy(def_field, field_arg->field, field_arg->field->size_of());
def_field->move_field_offset((ptrdiff_t)
(&def_field->getTable()->insert_values[0] - def_field->getTable()->record[0]));
set_field(def_field);
}
else
{
Field *tmp_field= field_arg->field;
/* charset doesn't matter here, it's to avoid sigsegv only */
tmp_field= new Field_null(0, 0, field_arg->field->field_name);
if (tmp_field)
{
tmp_field->init(field_arg->field->getTable());
set_field(tmp_field);
}
}
return false;
}
void Item_insert_value::print(String *str)
{
str->append(STRING_WITH_LEN("values("));
arg->print(str);
str->append(')');
}
} /* namespace drizzled */
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