diff options
Diffstat (limited to 'sql/sql_error.cc')
| -rw-r--r-- | sql/sql_error.cc | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/sql/sql_error.cc b/sql/sql_error.cc new file mode 100644 index 00000000000..13466f454c5 --- /dev/null +++ b/sql/sql_error.cc @@ -0,0 +1,219 @@ +/* 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); +} + |