database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-29 05:21:33 +03:00
Code Activity

A fix and a test case for Bug#15752 "Lost connection to MySQL server

Browse Source 
when calling a SP from C API"

The bug was caused by lack of checks for misuse in mysql_real_query. 
A stored procedure always returns at least one result, which is the 
status of execution of the procedure itself.
This result, or so-called OK packet, is similar to a result
returned by INSERT/UPDATE/CREATE operations: it contains the overall
status of execution, the number of affected rows and the number of
warnings. The client test program attached to the bug did not read this 
result and ivnoked the next query. In turn, libmysql had no check for 
such scenario and mysql_real_query was simply trying to send that query 
without reading the pending response, thus messing up the communication
protocol.

The fix is to return an error from mysql_real_query when it's called
prior to retrieval of all pending results.
This commit is contained in:
kostja@bodhi.local
2006-07-24 14:56:53 +04:00
parent afb31714c5
commit 2ce1a07c89
9 changed files with 150 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
sql/protocol.cc
View File

@ -322,7 +322,7 @@ static char eof_buff[1]= { (char) 254 }; /* Marker for end of fields */
254 Marker (1 byte)
warning_count Stored in 2 bytes; New in 4.1 protocol
status_flag Stored in 2 bytes;
For flags like SERVER_STATUS_MORE_RESULTS
For flags like SERVER_MORE_RESULTS_EXISTS
Note that the warning count will not be sent if 'no_flush' is set as
we don't want to report the warning count until all data is sent to the