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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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* Copyright (C) 2008 Sun Microsystems
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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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* 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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* 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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#include <drizzled/server_includes.h>
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#include <drizzled/error.h>
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#include <drizzled/name_resolution_context.h>
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#include <drizzled/table.h>
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#include <drizzled/session.h>
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#include <drizzled/current_session.h>
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#include <drizzled/item/default_value.h>
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bool Item_default_value::eq(const Item *item, bool binary_cmp) const
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return item->type() == DEFAULT_VALUE_ITEM &&
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((Item_default_value *)item)->arg->eq(arg, binary_cmp);
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bool Item_default_value::fix_fields(Session *session, Item **)
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Item_field *field_arg;
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if (!arg->fixed && arg->fix_fields(session, &arg))
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real_arg= arg->real_item();
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if (real_arg->type() != FIELD_ITEM)
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my_error(ER_NO_DEFAULT_FOR_FIELD, MYF(0), arg->name);
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field_arg= (Item_field *)real_arg;
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if (field_arg->field->flags & NO_DEFAULT_VALUE_FLAG)
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my_error(ER_NO_DEFAULT_FOR_FIELD, MYF(0), field_arg->field->field_name);
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if (!(def_field= (Field*) sql_alloc(field_arg->field->size_of())))
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memcpy(def_field, field_arg->field, field_arg->field->size_of());
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def_field->move_field_offset((my_ptrdiff_t)
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(def_field->table->s->default_values -
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def_field->table->record[0]));
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context->process_error(session);
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void Item_default_value::print(String *str, enum_query_type query_type)
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str->append(STRING_WITH_LEN("default"));
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str->append(STRING_WITH_LEN("default("));
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arg->print(str, query_type);
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int Item_default_value::save_in_field(Field *field_arg, bool no_conversions)
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if (field_arg->flags & NO_DEFAULT_VALUE_FLAG)
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if (field_arg->reset())
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my_message(ER_CANT_CREATE_GEOMETRY_OBJECT,
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ER(ER_CANT_CREATE_GEOMETRY_OBJECT), MYF(0));
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push_warning_printf(field_arg->table->in_use,
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DRIZZLE_ERROR::WARN_LEVEL_WARN,
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ER_NO_DEFAULT_FOR_FIELD,
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ER(ER_NO_DEFAULT_FOR_FIELD),
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field_arg->field_name);
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field_arg->set_default();
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return Item_field::save_in_field(field_arg, no_conversions);
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This method like the walk method traverses the item tree, but at the
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same time it can replace some nodes in the tree.
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Item *Item_default_value::transform(Item_transformer transformer, unsigned char *args)
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Item *new_item= arg->transform(transformer, args);
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Session::change_item_tree() should be called only if the tree was
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really transformed, i.e. when a new item has been created.
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Otherwise we'll be allocating a lot of unnecessary memory for
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change records at each execution.
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current_session->change_item_tree(&arg, new_item);
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return (this->*transformer)(args);