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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/functions/get_system_var.h>
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#include <drizzled/session.h>
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Item_func_get_system_var::
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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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:var(var_arg), var_type(var_type_arg), component(*component_arg)
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/* set_name() will allocate the name */
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set_name(name_arg, name_len_arg, system_charset_info);
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Item_func_get_system_var::fix_fields(Session *session, Item **ref)
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Evaluate the system variable and substitute the result (a basic constant)
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instead of this item. If the variable can not be evaluated,
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the error is reported in sys_var::item().
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if (!(item= var->item(session, var_type, &component)))
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return(1); // Impossible
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item->set_name(name, 0, system_charset_info); // don't allocate a new name
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session->change_item_tree(ref, item);
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Item *get_system_var(Session *session, enum_var_type var_type, LEX_STRING name,
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LEX_STRING *base_name, *component_name;
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base_name= &component;
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component_name= &name;
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component_name= &component; // Empty string
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if (!(var= find_sys_var(session, base_name->str, base_name->length)))
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if (!var->is_struct())
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my_error(ER_VARIABLE_IS_NOT_STRUCT, MYF(0), base_name->str);
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set_if_smaller(component_name->length, MAX_SYS_VAR_LENGTH);
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return new Item_func_get_system_var(var, var_type, component_name,