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492.3.35
by Lee
more changes to move functions from item_func.cc/h to the functions directory |
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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_FUNCTIONS_USER_VAR_AS_OUT_PARAM_H
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#define DRIZZLED_FUNCTIONS_USER_VAR_AS_OUT_PARAM_H
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#include <drizzled/functions/func.h> |
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/*
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This item represents user variable used as out parameter (e.g in LOAD DATA),
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and it is supposed to be used only for this purprose. So it is simplified
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a lot. Actually you should never obtain its value.
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The only two reasons for this thing being an Item is possibility to store it
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in List<Item> and desire to place this code somewhere near other functions
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working with user variables.
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*/
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class Item_user_var_as_out_param :public Item |
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{
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LEX_STRING name; |
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user_var_entry *entry; |
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public: |
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Item_user_var_as_out_param(LEX_STRING a) : name(a) {} |
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/* We should return something different from FIELD_ITEM here */
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enum Type type() const { return STRING_ITEM;} |
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double val_real(); |
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int64_t val_int(); |
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String *val_str(String *str); |
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my_decimal *val_decimal(my_decimal *decimal_buffer); |
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/* fix_fields() binds variable name with its entry structure */
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bool fix_fields(Session *session, Item **ref); |
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virtual void print(String *str, enum_query_type query_type); |
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void set_null_value(const CHARSET_INFO * const cs); |
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void set_value(const char *str, uint32_t length, const CHARSET_INFO * const cs); |
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};
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#endif /* DRIZZLED_FUNCTIONS_USER_VAR_AS_OUT_PARAM_H */ |