database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

Auto-merge from mysql-trunk-bugfixing.

Browse Source 
******
This patch fixes the following bugs:
  - Bug#5889: Exit handler for a warning doesn't hide the warning in
    trigger
  - Bug#9857: Stored procedures: handler for sqlwarning ignored
  - Bug#23032: Handlers declared in a SP do not handle warnings generated
    in sub-SP
  - Bug#36185: Incorrect precedence for warning and exception handlers

The problem was in the way warnings/errors during stored routine execution
were handled. Prior to this patch the logic was as follows:

  - when a warning/an error happens: if we're executing a stored routine,
    and there is a handler for that warning/error, remember the handler,
    ignore the warning/error and continue execution.

  - after a stored routine instruction is executed: check for a remembered
    handler and activate one (if any).

This logic caused several problems:

  - if one instruction generates several warnings (errors) it's impossible
    to choose the right handler -- a handler for the first generated
    condition was chosen and remembered for activation.

  - mess with handling conditions in scopes different from the current one.

  - not putting generated warnings/errors into Warning Info (Diagnostic
    Area) is against The Standard.

The patch changes the logic as follows:

  - Diagnostic Area is cleared on the beginning of each statement that
    either is able to generate warnings, or is able to work with tables.

  - at the end of a stored routine instruction, Diagnostic Area is left
    intact.

  - Diagnostic Area is checked after each stored routine instruction. If
    an instruction generates several condition, it's now possible to take a
    look at all of them and determine an appropriate handler.
This commit is contained in:
Alexander Nozdrin
2010-07-30 19:28:36 +04:00
parent 02a0787d8d
commit b2f8005094
30 changed files with 1385 additions and 344 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
sql/sql_signal.cc
View File

@ -499,18 +499,6 @@ bool Resignal_statement::execute(THD *thd)
}
/* RESIGNAL with signal_value */
/* Make room for 2 conditions */
thd->warning_info->reserve_space(thd, 2);
MYSQL_ERROR *raised= NULL;
raised= thd->raise_condition_no_handler(signaled->get_sql_errno(),
signaled->get_sqlstate(),
signaled->get_level(),
signaled->get_message_text());
if (raised)
raised->copy_opt_attributes(signaled);
result= raise_condition(thd, signaled);
DBUG_RETURN(result);