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492.3.24
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_GET_SYSTEM_VAR_H
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#define DRIZZLED_FUNCTIONS_GET_SYSTEM_VAR_H
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#include <drizzled/functions/func.h> |
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/* A system variable */
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class Item_func_get_system_var :public Item_func |
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{
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sys_var *var; |
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enum_var_type var_type; |
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LEX_STRING component; |
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public: |
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Item_func_get_system_var(sys_var *var_arg, enum_var_type var_type_arg, |
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LEX_STRING *component_arg, const char *name_arg, |
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size_t name_len_arg); |
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bool fix_fields(Session *session, Item **ref); |
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/*
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Stubs for pure virtual methods. Should never be called: this
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item is always substituted with a constant in fix_fields().
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*/
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double val_real() { assert(0); return 0.0; } |
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int64_t val_int() { assert(0); return 0; } |
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String* val_str(String*) { assert(0); return 0; } |
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void fix_length_and_dec() { assert(0); } |
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/* TODO: fix to support views */
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const char *func_name() const { return "get_system_var"; } |
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/**
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Indicates whether this system variable is written to the binlog or not.
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Variables are written to the binlog as part of "status_vars" in
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Query_log_event, as an Intvar_log_event, or a Rand_log_event.
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@return true if the variable is written to the binlog, false otherwise.
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*/
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bool is_written_to_binlog(); |
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};
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#endif /* DRIZZLED_FUNCTIONS_GET_SYSTEM_VAR_H */ |