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584.4.10
by Monty Taylor
Broke out cached_item. |
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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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*
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* Copyright (C) 2008 Sun Microsystems
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*
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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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*
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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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*
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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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*/
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#ifndef DRIZZLED_CACHED_ITEM_H
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#define DRIZZLED_CACHED_ITEM_H
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#include <drizzled/sql_alloc.h> |
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#include <drizzled/sql_string.h> |
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class Item; |
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class Session; |
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class Cached_item :public Sql_alloc |
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{
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public: |
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bool null_value; |
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Cached_item() :null_value(0) {} |
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virtual bool cmp(void)=0; |
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virtual ~Cached_item(); /*line -e1509 */ |
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};
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class Cached_item_str :public Cached_item |
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{
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Item *item; |
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String value,tmp_value; |
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public: |
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Cached_item_str(Session *session, Item *arg); |
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bool cmp(void); |
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~Cached_item_str(); // Deallocate String:s |
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};
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class Cached_item_real :public Cached_item |
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{
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Item *item; |
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double value; |
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public: |
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Cached_item_real(Item *item_par) :item(item_par),value(0.0) {} |
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bool cmp(void); |
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};
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class Cached_item_int :public Cached_item |
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{
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Item *item; |
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int64_t value; |
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public: |
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Cached_item_int(Item *item_par) :item(item_par),value(0) {} |
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bool cmp(void); |
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};
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class Cached_item_decimal :public Cached_item |
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{
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Item *item; |
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my_decimal value; |
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public: |
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Cached_item_decimal(Item *item_par); |
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bool cmp(void); |
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};
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class Cached_item_field :public Cached_item |
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{
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unsigned char *buff; |
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Field *field; |
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uint32_t length; |
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public: |
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Cached_item_field(Field *arg_field) : field(arg_field) |
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{
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field= arg_field; |
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/* TODO: take the memory allocation below out of the constructor. */
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buff= (unsigned char*) sql_calloc(length=field->pack_length()); |
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}
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bool cmp(void); |
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};
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Cached_item *new_Cached_item(Session *session, Item *item, |
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bool use_result_field); |
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#endif /* DRIZZLED_CACHED_ITEM_H */ |