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Bug #27571 asynchronousity in setting mysql_query::error and

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Query_log_event::error_code

A query can perform completely having the local var error of mysql_$query
zero, where $query in insert, update, delete, load,
and be  binlogged with error_code e.g KILLED_QUERY while there is no
reason do to so.
That can happen because Query_log_event consults thd->killed flag to
evaluate error_code.

Fixed with implementing a scheme suggested and partly implemented at
time of bug@22725 work-on. error_status is cached immediatly after the
control leaves the main rows-loop and that instance always corresponds
to `error' the local of mysql_$query functions. The cached value
is passed to Query_log_event constructor, not the default thd->killed
which can be changed in between of the caching and the constructing.
This commit is contained in:
aelkin/elkin@koti.dsl.inet.fi
2007-10-29 15:20:59 +02:00
parent ed0ab76e28
commit 27436f0ba3
12 changed files with 509 additions and 203 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
sql/sql_load.cc
View File

@@ -85,7 +85,8 @@ static int read_sep_field(THD *thd, COPY_INFO &info, TABLE_LIST *table_list,
#ifndef EMBEDDED_LIBRARY
static bool write_execute_load_query_log_event(THD *thd,
bool duplicates, bool ignore,
bool transactional_table);
bool transactional_table,
THD::killed_state killed_status);
#endif /* EMBEDDED_LIBRARY */
/*
@@ -135,6 +136,7 @@ bool mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
char *tdb= thd->db ? thd->db : db; // Result is never null
ulong skip_lines= ex->skip_lines;
bool transactional_table;
THD::killed_state killed_status= THD::NOT_KILLED;
DBUG_ENTER("mysql_load");
#ifdef EMBEDDED_LIBRARY
@@ -404,7 +406,16 @@ bool mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
free_blobs(table); /* if pack_blob was used */
table->copy_blobs=0;
thd->count_cuted_fields= CHECK_FIELD_IGNORE;
/*
simulated killing in the middle of per-row loop
must be effective for binlogging
*/
DBUG_EXECUTE_IF("simulate_kill_bug27571",
{
error=1;
thd->killed= THD::KILL_QUERY;
};);
killed_status= (error == 0)? THD::NOT_KILLED : thd->killed;
/*
We must invalidate the table in query cache before binlog writing and
ha_autocommit_...
@@ -446,7 +457,8 @@ bool mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
{
if (thd->transaction.stmt.modified_non_trans_table)
write_execute_load_query_log_event(thd, handle_duplicates,
ignore, transactional_table);
ignore, transactional_table,
killed_status);
else
{
Delete_file_log_event d(thd, db, transactional_table);
@@ -477,7 +489,8 @@ bool mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
read_info.end_io_cache();
if (lf_info.wrote_create_file)
write_execute_load_query_log_event(thd, handle_duplicates,
ignore, transactional_table);
ignore, transactional_table,
killed_status);
}
#endif /*!EMBEDDED_LIBRARY*/
if (transactional_table)
@@ -504,7 +517,8 @@ err:
/* Not a very useful function; just to avoid duplication of code */
static bool write_execute_load_query_log_event(THD *thd,
bool duplicates, bool ignore,
bool transactional_table)
bool transactional_table,
THD::killed_state killed_err_arg)
{
Execute_load_query_log_event
e(thd, thd->query, thd->query_length,
@@ -512,7 +526,7 @@ static bool write_execute_load_query_log_event(THD *thd,
(char*)thd->lex->fname_end - (char*)thd->query,
(duplicates == DUP_REPLACE) ? LOAD_DUP_REPLACE :
(ignore ? LOAD_DUP_IGNORE : LOAD_DUP_ERROR),
transactional_table, FALSE);
transactional_table, FALSE, killed_err_arg);
return mysql_bin_log.write(&e);
}