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sql_error.cc, sql_prepare.cc:
new file
Client-server protocol 4.1 changes - Server side:
* Enhanced metadata information:
- SHOW [COUNT(*)] ERRORS [LIMIT [offset,] rows]
- SHOW [COUNT(*)] WARNING [LIMIT [offset,] rows]
- SHOW TABLE TYPES
- SHOW PRIVILEGES
- SHOW COLUMN TYPES (Not fully implemented)
* Prepared execution
* Long data handling in pieces
* And other misc changes
This commit is contained in:
unknown
219
sql/sql_error.cc
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219
sql/sql_error.cc
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/* Copyright (C) 1995-2002 MySQL AB
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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; either version 2 of the License, or
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(at your option) any later version.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**********************************************************************
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This file contains the implementation of error and warnings related
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- Whenever an error or warning occured, it pushes the same to
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the respective list along with sending it to client.
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- When client requests the information using SHOW command, then
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server processes from this list and returns back in the form of
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resultset.
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syntax : SHOW [COUNT(*)] ERRORS [LIMIT [offset,] rows]
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SHOW [COUNT(*)] WARNINGS [LIMIT [offset,] rows]
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***********************************************************************/
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/* Handles errors and warnings .. */
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#include "mysql_priv.h"
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/*
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Push the error to error list
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*/
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void push_error(uint code, const char *msg)
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{
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THD *thd=current_thd;
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mysql_st_error *err = new mysql_st_error(code,msg,(const char*)thd->query);
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if (thd->err_list.elements >= thd->max_error_count)
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{
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/* Remove the old elements and always maintain the max size
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equal to sql_error_count.
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If one max_error_count using sets sql_error_count less than
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the current list size, then make sure it always grows upto
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sql_error_count size only
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** BUG ** : Doesn't work in removing the old one
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from the list, and thus SET SQL_ERROR_COUNT=x doesn't work
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*/
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for (uint count=thd->err_list.elements-1;
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count <= thd->max_error_count-1; count++)
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{
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thd->err_list.remove_last();
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}
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}
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thd->err_list.push_front(err);
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}
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/*
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Push the warning to warning list
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*/
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void push_warning(uint code, const char *msg)
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{
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THD *thd=current_thd;
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mysql_st_error *warn = new mysql_st_error(code,msg,(const char *)thd->query);
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if (thd->warn_list.elements >= thd->max_warning_count)
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{
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/* Remove the old elements and always maintian the max size
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equal to sql_error_count
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*/
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for (uint count=thd->warn_list.elements;
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count <= thd->max_warning_count-1; count++)
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{
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thd->warn_list.remove_last();
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}
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}
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thd->warn_list.push_front(warn);
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}
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/*
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List all errors
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*/
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int mysqld_show_errors(THD *thd)
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{
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List<Item> field_list;
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DBUG_ENTER("mysqld_show_errors");
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field_list.push_back(new Item_int("CODE",0,4));
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field_list.push_back(new Item_empty_string("MESSAGE",MYSQL_ERRMSG_SIZE));
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field_list.push_back(new Item_empty_string("QUERY",NAME_LEN));
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if (send_fields(thd,field_list,1))
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DBUG_RETURN(1);
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mysql_st_error *err;
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SELECT_LEX *sel=&thd->lex.select_lex;
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ha_rows offset = sel->offset_limit,limit = sel->select_limit;
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uint num_rows = 0;
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Error_iterator<mysql_st_error> it(thd->err_list);
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while(offset-- && (err = it++));/* Should be fixed with overloaded
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operator '+' or with new funtion
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goto() in list ?
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*/
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while((num_rows++ < limit) && (err = it++))
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{
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thd->packet.length(0);
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net_store_data(&thd->packet,(uint32)err->code);
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net_store_data(&thd->packet,err->msg);
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net_store_data(&thd->packet,err->query);
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if (my_net_write(&thd->net,(char*)thd->packet.ptr(),thd->packet.length()))
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DBUG_RETURN(-1);
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}
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send_eof(&thd->net);
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DBUG_RETURN(0);
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}
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/*
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Return errors count
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*/
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int mysqld_show_errors_count(THD *thd)
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{
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List<Item> field_list;
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DBUG_ENTER("mysqld_show_errors_count");
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field_list.push_back(new Item_int("COUNT(*)",0,4));
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if (send_fields(thd,field_list,1))
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DBUG_RETURN(1);
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thd->packet.length(0);
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net_store_data(&thd->packet,(uint32)thd->err_list.elements);
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if (my_net_write(&thd->net,(char*) thd->packet.ptr(),thd->packet.length()))
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DBUG_RETURN(-1);
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send_eof(&thd->net);
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DBUG_RETURN(0);
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}
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/*
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List all warnings
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*/
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int mysqld_show_warnings(THD *thd)
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{
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List<Item> field_list;
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DBUG_ENTER("mysqld_show_warnings");
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field_list.push_back(new Item_int("CODE",0,21));
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field_list.push_back(new Item_empty_string("MESSAGE",MYSQL_ERRMSG_SIZE));
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field_list.push_back(new Item_empty_string("QUERY",NAME_LEN));
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if (send_fields(thd,field_list,1))
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DBUG_RETURN(1);
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mysql_st_error *warn;
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SELECT_LEX *sel=&thd->lex.select_lex;
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ha_rows offset = sel->offset_limit,limit = sel->select_limit;
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uint num_rows = 0;
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Error_iterator<mysql_st_error> it(thd->warn_list);
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while(offset-- && (warn = it++));
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while((num_rows++ < limit) && (warn = it++))
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{
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thd->packet.length(0);
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net_store_data(&thd->packet,(uint32)warn->code);
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net_store_data(&thd->packet,warn->msg);
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net_store_data(&thd->packet,warn->query);
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if (my_net_write(&thd->net,(char*) thd->packet.ptr(),thd->packet.length()))
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DBUG_RETURN(-1);
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}
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send_eof(&thd->net);
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DBUG_RETURN(0);
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}
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/*
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Return warnings count
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*/
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int mysqld_show_warnings_count(THD *thd)
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{
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List<Item> field_list;
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DBUG_ENTER("mysqld_show_warnings_count");
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field_list.push_back(new Item_int("COUNT(*)",0,21));
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if (send_fields(thd,field_list,1))
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DBUG_RETURN(1);
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thd->packet.length(0);
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net_store_data(&thd->packet,(uint32)thd->warn_list.elements);
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if (my_net_write(&thd->net,(char*)thd->packet.ptr(),thd->packet.length()))
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DBUG_RETURN(-1);
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send_eof(&thd->net);
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DBUG_RETURN(0);
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}
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