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Bug #29157: UPDATE, changed rows incorrect

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Sometimes the number of really updated rows (with changed
column values) cannot be determined at the server level
alone (e.g. if the storage engine does not return enough
column values to verify that). So the only dependable way
in such cases is to let the storage engine return that
information if possible.
Fixed the bug at server level by providing a way for the 
storage engine to return information about wether it 
actually updated the row or the old and the new column 
values are the same. It can do that by returning 
HA_ERR_RECORD_IS_THE_SAME in ha_update_row().
Note that each storage engine may choose not to try to
return this status code, so this behaviour remains 
storage engine specific.


include/my_base.h:
  Bug #29157: handle the row not updated special return value
sql/log_event.cc:
  Bug #29157: handle the row not updated special return value
sql/sp.cc:
  Bug #29157: handle the row not updated special return value
sql/sql_acl.cc:
  Bug #29157: handle the row not updated special return value
sql/sql_insert.cc:
  Bug #29157: handle the row not updated special return value
sql/sql_servers.cc:
  Bug #29157: handle the row not updated special return value
sql/sql_update.cc:
  Bug #29157: handle the row not updated special return value
This commit is contained in:
unknown 2007-06-28 16:07:55 +03:00
parent 28187da774
commit ba4682ae10
7 changed files with 79 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/my_base.h
View File

@ -396,7 +396,9 @@ enum ha_base_keytype {
#define HA_ERR_AUTOINC_READ_FAILED 166 /* Failed to get next autoinc value */
#define HA_ERR_AUTOINC_ERANGE 167 /* Failed to set row autoinc value */
#define HA_ERR_GENERIC 168 /* Generic error */
#define HA_ERR_LAST 168 /*Copy last error nr.*/
#define HA_ERR_RECORD_IS_THE_SAME 169 /* row not actually updated :
new values same as the old values */
#define HA_ERR_LAST 169 /*Copy last error nr.*/
/* Add error numbers before HA_ERR_LAST and change it accordingly. */
#define HA_ERR_ERRORS (HA_ERR_LAST - HA_ERR_FIRST + 1)

6
sql/log_event.cc
View File

@ -7171,8 +7171,10 @@ replace_record(THD *thd, TABLE *table,
{
error=table->file->ha_update_row(table->record[1],
table->record[0]);
if (error)
if (error && error != HA_ERR_RECORD_IS_THE_SAME)
table->file->print_error(error, MYF(0));
else
error= 0;
DBUG_RETURN(error);
}
else
@ -7856,6 +7858,8 @@ int Update_rows_log_event::do_exec_row(TABLE *table)
database into the after image delivered from the master.
*/
error= table->file->ha_update_row(table->record[1], table->record[0]);
if (error == HA_ERR_RECORD_IS_THE_SAME)
error= 0;
return error;
}

5
sql/sp.cc
View File

@ -715,8 +715,11 @@ sp_update_routine(THD *thd, int type, sp_name *name, st_sp_chistics *chistics)
table->field[MYSQL_PROC_FIELD_COMMENT]->store(chistics->comment.str,
chistics->comment.length,
system_charset_info);
if ((table->file->ha_update_row(table->record[1],table->record[0])))
if ((ret= table->file->ha_update_row(table->record[1],table->record[0])) &&
ret != HA_ERR_RECORD_IS_THE_SAME)
ret= SP_WRITE_ROW_FAILED;
else
ret= 0;
}
if (ret == SP_OK)

45
sql/sql_acl.cc
View File

@ -1825,7 +1825,8 @@ static bool update_user_table(THD *thd, TABLE *table,
}
store_record(table,record[1]);
table->field[2]->store(new_password, new_password_len, system_charset_info);
if ((error=table->file->ha_update_row(table->record[1],table->record[0])))
if ((error=table->file->ha_update_row(table->record[1],table->record[0])) &&
error != HA_ERR_RECORD_IS_THE_SAME)
{
table->file->print_error(error,MYF(0)); /* purecov: deadcode */
DBUG_RETURN(1);
@ -2041,12 +2042,18 @@ static int replace_user_table(THD *thd, TABLE *table, const LEX_USER &combo,
We should NEVER delete from the user table, as a uses can still
use mysqld even if he doesn't have any privileges in the user table!
*/
if (cmp_record(table,record[1]) &&
(error=table->file->ha_update_row(table->record[1],table->record[0])))
{ // This should never happen
table->file->print_error(error,MYF(0)); /* purecov: deadcode */
error= -1; /* purecov: deadcode */
goto end; /* purecov: deadcode */
if (cmp_record(table,record[1]))
{
if ((error=
table->file->ha_update_row(table->record[1],table->record[0])) &&
error != HA_ERR_RECORD_IS_THE_SAME)
{ // This should never happen
table->file->print_error(error,MYF(0)); /* purecov: deadcode */
error= -1; /* purecov: deadcode */
goto end; /* purecov: deadcode */
}
else
error= 0;
}
}
else if ((error=table->file->ha_write_row(table->record[0]))) // insert
@ -2161,7 +2168,8 @@ static int replace_db_table(TABLE *table, const char *db,
if (rights)
{
if ((error= table->file->ha_update_row(table->record[1],
table->record[0])))
table->record[0])) &&
error != HA_ERR_RECORD_IS_THE_SAME)
goto table_error; /* purecov: deadcode */
}
else /* must have been a revoke of all privileges */
@ -2543,12 +2551,14 @@ static int replace_column_table(GRANT_TABLE *g_t,
error=table->file->ha_update_row(table->record[1],table->record[0]);
else
error=table->file->ha_delete_row(table->record[1]);
if (error)
if (error && error != HA_ERR_RECORD_IS_THE_SAME)
{
table->file->print_error(error,MYF(0)); /* purecov: inspected */
result= -1; /* purecov: inspected */
goto end; /* purecov: inspected */
}
else
error= 0;
grant_column= column_hash_search(g_t, column->column.ptr(),
column->column.length());
if (grant_column) // Should always be true
@ -2608,7 +2618,8 @@ static int replace_column_table(GRANT_TABLE *g_t,
{
int tmp_error;
if ((tmp_error=table->file->ha_update_row(table->record[1],
table->record[0])))
table->record[0])) &&
tmp_error != HA_ERR_RECORD_IS_THE_SAME)
{ /* purecov: deadcode */
table->file->print_error(tmp_error,MYF(0)); /* purecov: deadcode */
result= -1; /* purecov: deadcode */
@ -2730,7 +2741,9 @@ static int replace_table_table(THD *thd, GRANT_TABLE *grant_table,
{
if (store_table_rights || store_col_rights)
{
if ((error=table->file->ha_update_row(table->record[1],table->record[0])))
if ((error=table->file->ha_update_row(table->record[1],
table->record[0])) &&
error != HA_ERR_RECORD_IS_THE_SAME)
goto table_error; /* purecov: deadcode */
}
else if ((error = table->file->ha_delete_row(table->record[1])))
@ -2848,7 +2861,9 @@ static int replace_routine_table(THD *thd, GRANT_NAME *grant_name,
{
if (store_proc_rights)
{
if ((error=table->file->ha_update_row(table->record[1],table->record[0])))
if ((error=table->file->ha_update_row(table->record[1],
table->record[0])) &&
error != HA_ERR_RECORD_IS_THE_SAME)
goto table_error;
}
else if ((error= table->file->ha_delete_row(table->record[1])))
@ -4914,8 +4929,12 @@ static int modify_grant_table(TABLE *table, Field *host_field,
system_charset_info);
user_field->store(user_to->user.str, user_to->user.length,
system_charset_info);
if ((error= table->file->ha_update_row(table->record[1], table->record[0])))
if ((error= table->file->ha_update_row(table->record[1],
table->record[0])) &&
error != HA_ERR_RECORD_IS_THE_SAME)
table->file->print_error(error, MYF(0));
else
error= 0;
}
else
{

16
sql/sql_insert.cc
View File

@ -1423,7 +1423,8 @@ int write_record(THD *thd, TABLE *table,COPY_INFO *info)
compare_record(table))
{
if ((error=table->file->ha_update_row(table->record[1],
table->record[0])))
table->record[0])) &&
error != HA_ERR_RECORD_IS_THE_SAME)
{
if (info->ignore &&
!table->file->is_fatal_error(error, HA_CHECK_DUP_KEY))
@ -1433,7 +1434,10 @@ int write_record(THD *thd, TABLE *table,COPY_INFO *info)
goto err;
}
info->updated++;
if (error != HA_ERR_RECORD_IS_THE_SAME)
info->updated++;
else
error= 0;
/*
If ON DUP KEY UPDATE updates a row instead of inserting one, it's
like a regular UPDATE statement: it should not affect the value of a
@ -1481,9 +1485,13 @@ int write_record(THD *thd, TABLE *table,COPY_INFO *info)
(!table->triggers || !table->triggers->has_delete_triggers()))
{
if ((error=table->file->ha_update_row(table->record[1],
table->record[0])))
table->record[0])) &&
error != HA_ERR_RECORD_IS_THE_SAME)
goto err;
info->deleted++;
if (error != HA_ERR_RECORD_IS_THE_SAME)
info->deleted++;
else
error= 0;
thd->record_first_successful_insert_id_in_cur_stmt(table->file->insert_id_for_cur_row);
/*
Since we pretend that we have done insert we should call

6
sql/sql_servers.cc
View File

@ -872,11 +872,15 @@ update_server_record(TABLE *table, FOREIGN_SERVER *server)
/* ok, so we can update since the record exists in the table */
store_record(table,record[1]);
store_server_fields(table, server);
if ((error=table->file->ha_update_row(table->record[1],table->record[0])))
if ((error=table->file->ha_update_row(table->record[1],
table->record[0])) &&
error != HA_ERR_RECORD_IS_THE_SAME)
{
DBUG_PRINT("info",("problems with ha_update_row %d", error));
goto end;
}
else
error= 0;
}
end:

23
sql/sql_update.cc
View File

@ -548,9 +548,12 @@ int mysql_update(THD *thd,
error= table->file->ha_update_row(table->record[1],
table->record[0]);
}
if (!error)
if (!error || error == HA_ERR_RECORD_IS_THE_SAME)
{
updated++;
if (error != HA_ERR_RECORD_IS_THE_SAME)
updated++;
else
error= 0;
thd->no_trans_update.stmt= !transactional_table;
if (table->triggers &&
@ -1524,7 +1527,8 @@ bool multi_update::send_data(List<Item> &not_used_values)
main_table->file->extra(HA_EXTRA_PREPARE_FOR_UPDATE);
}
if ((error=table->file->ha_update_row(table->record[1],
table->record[0])))
table->record[0])) &&
error != HA_ERR_RECORD_IS_THE_SAME)
{
updated--;
if (!ignore ||
@ -1542,6 +1546,11 @@ bool multi_update::send_data(List<Item> &not_used_values)
}
else
{
if (error == HA_ERR_RECORD_IS_THE_SAME)
{
error= 0;
updated--;
}
/* non-transactional or transactional table got modified */
/* either multi_update class' flag is raised in its branch */
if (table->file->has_transactions())
@ -1768,13 +1777,17 @@ int multi_update::do_updates(bool from_send_error)
goto err;
}
if ((local_error=table->file->ha_update_row(table->record[1],
table->record[0])))
table->record[0])) &&
local_error != HA_ERR_RECORD_IS_THE_SAME)
{
if (!ignore ||
table->file->is_fatal_error(local_error, HA_CHECK_DUP_KEY))
goto err;
}
updated++;
if (local_error != HA_ERR_RECORD_IS_THE_SAME)
updated++;
else
local_error= 0;
if (table->triggers &&
table->triggers->process_triggers(thd, TRG_EVENT_UPDATE,