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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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#ifndef DRIZZLED_ITEM_NULL_H
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#define DRIZZLED_ITEM_NULL_H
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#include "drizzled/item/basic_constant.h"
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class Item_null :public Item_basic_constant
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Item_null(char *name_par=0)
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maybe_null= null_value= true;
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name= name_par ? name_par : (char*) "NULL";
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collation.set(&my_charset_bin, DERIVATION_IGNORABLE);
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enum Type type() const { return NULL_ITEM; }
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bool eq(const Item *item, bool binary_cmp) const;
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String *val_str(String *str);
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my_decimal *val_decimal(my_decimal *);
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int save_in_field(Field *field, bool no_conversions);
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int save_safe_in_field(Field *field);
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bool send(plugin::Client *client, String *str);
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enum Item_result result_type () const { return STRING_RESULT; }
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enum_field_types field_type() const { return DRIZZLE_TYPE_NULL; }
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bool basic_const_item() const { return 1; }
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Item *clone_item() { return new Item_null(name); }
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bool is_null() { return true; }
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virtual void print(String *str, enum_query_type);
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Item *safe_charset_converter(const CHARSET_INFO * const tocs);
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class Item_null_result :public Item_null
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Item_null_result() : Item_null(), result_field(0) {}
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bool is_result_field() { return result_field != 0; }
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void save_in_result_field(bool no_conversions)
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save_in_field(result_field, no_conversions);
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} /* namespace drizzled */
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#endif /* DRIZZLED_ITEM_NULL_H */