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/* Copyright (C) 1995-2002 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**********************************************************************
This file contains the implementation of error and warnings related
- Whenever an error or warning occured, it pushes the same to
the respective list along with sending it to client.
- When client requests the information using SHOW command, then
server processes from this list and returns back in the form of
resultset.
syntax : SHOW [COUNT(*)] ERRORS [LIMIT [offset,] rows]
SHOW [COUNT(*)] WARNINGS [LIMIT [offset,] rows]
***********************************************************************/
/* Handles errors and warnings .. */
#include "mysql_priv.h"
/*
Push the error to error list
*/
void push_error(uint code, const char *msg)
{
THD *thd=current_thd;
mysql_st_error *err = new mysql_st_error(code,msg,(const char*)thd->query);
if (thd->err_list.elements >= thd->max_error_count)
{
/* Remove the old elements and always maintain the max size
equal to sql_error_count.
If one max_error_count using sets sql_error_count less than
the current list size, then make sure it always grows upto
sql_error_count size only
** BUG ** : Doesn't work in removing the old one
from the list, and thus SET SQL_ERROR_COUNT=x doesn't work
*/
for (uint count=thd->err_list.elements-1;
count <= thd->max_error_count-1; count++)
{
thd->err_list.remove_last();
}
}
thd->err_list.push_front(err);
}
/*
Push the warning to warning list
*/
void push_warning(uint code, const char *msg)
{
THD *thd=current_thd;
mysql_st_error *warn = new mysql_st_error(code,msg,(const char *)thd->query);
if (thd->warn_list.elements >= thd->max_warning_count)
{
/* Remove the old elements and always maintian the max size
equal to sql_error_count
*/
for (uint count=thd->warn_list.elements;
count <= thd->max_warning_count-1; count++)
{
thd->warn_list.remove_last();
}
}
thd->warn_list.push_front(warn);
}
/*
List all errors
*/
int mysqld_show_errors(THD *thd)
{
List<Item> field_list;
DBUG_ENTER("mysqld_show_errors");
field_list.push_back(new Item_int("CODE",0,4));
field_list.push_back(new Item_empty_string("MESSAGE",MYSQL_ERRMSG_SIZE));
field_list.push_back(new Item_empty_string("QUERY",NAME_LEN));
if (send_fields(thd,field_list,1))
DBUG_RETURN(1);
mysql_st_error *err;
SELECT_LEX *sel=&thd->lex.select_lex;
ha_rows offset = sel->offset_limit,limit = sel->select_limit;
uint num_rows = 0;
Error_iterator<mysql_st_error> it(thd->err_list);
while(offset-- && (err = it++));/* Should be fixed with overloaded
operator '+' or with new funtion
goto() in list ?
*/
while((num_rows++ < limit) && (err = it++))
{
thd->packet.length(0);
net_store_data(&thd->packet,(uint32)err->code);
net_store_data(&thd->packet,err->msg);
net_store_data(&thd->packet,err->query);
if (my_net_write(&thd->net,(char*)thd->packet.ptr(),thd->packet.length()))
DBUG_RETURN(-1);
}
send_eof(&thd->net);
DBUG_RETURN(0);
}
/*
Return errors count
*/
int mysqld_show_errors_count(THD *thd)
{
List<Item> field_list;
DBUG_ENTER("mysqld_show_errors_count");
field_list.push_back(new Item_int("COUNT(*)",0,4));
if (send_fields(thd,field_list,1))
DBUG_RETURN(1);
thd->packet.length(0);
net_store_data(&thd->packet,(uint32)thd->err_list.elements);
if (my_net_write(&thd->net,(char*) thd->packet.ptr(),thd->packet.length()))
DBUG_RETURN(-1);
send_eof(&thd->net);
DBUG_RETURN(0);
}
/*
List all warnings
*/
int mysqld_show_warnings(THD *thd)
{
List<Item> field_list;
DBUG_ENTER("mysqld_show_warnings");
field_list.push_back(new Item_int("CODE",0,21));
field_list.push_back(new Item_empty_string("MESSAGE",MYSQL_ERRMSG_SIZE));
field_list.push_back(new Item_empty_string("QUERY",NAME_LEN));
if (send_fields(thd,field_list,1))
DBUG_RETURN(1);
mysql_st_error *warn;
SELECT_LEX *sel=&thd->lex.select_lex;
ha_rows offset = sel->offset_limit,limit = sel->select_limit;
uint num_rows = 0;
Error_iterator<mysql_st_error> it(thd->warn_list);
while(offset-- && (warn = it++));
while((num_rows++ < limit) && (warn = it++))
{
thd->packet.length(0);
net_store_data(&thd->packet,(uint32)warn->code);
net_store_data(&thd->packet,warn->msg);
net_store_data(&thd->packet,warn->query);
if (my_net_write(&thd->net,(char*) thd->packet.ptr(),thd->packet.length()))
DBUG_RETURN(-1);
}
send_eof(&thd->net);
DBUG_RETURN(0);
}
/*
Return warnings count
*/
int mysqld_show_warnings_count(THD *thd)
{
List<Item> field_list;
DBUG_ENTER("mysqld_show_warnings_count");
field_list.push_back(new Item_int("COUNT(*)",0,21));
if (send_fields(thd,field_list,1))
DBUG_RETURN(1);
thd->packet.length(0);
net_store_data(&thd->packet,(uint32)thd->warn_list.elements);
if (my_net_write(&thd->net,(char*)thd->packet.ptr(),thd->packet.length()))
DBUG_RETURN(-1);
send_eof(&thd->net);
DBUG_RETURN(0);
}
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