bk commit into 5.0 tree (gshchepa:1.2497) BUG#30201

[<gshchepa]

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ChangeSet@stripped, 2007-08-03 01:15:22+05:00, gshchepa@stripped +1 -0
  Fixed bug #30201.
  Killing a SELECT query with KILL QUERY or KILL CONNECTION
  caused a server crash if the query cache is enabled.
  
  Normal evaluation of a query may be interrupted by the
  KILL QUERY/CONNECTION statement, in this case the mysql_execute_command
  function returns TRUE. However, result of this function was ignored,
  and the query_cache_end_of_result function was called with
  the incompletely initialized lex object value. That caused a crash.

  sql/sql_parse.cc@stripped, 2007-08-03 00:47:05+05:00, gshchepa@stripped +3 -3
    Fixed bug #30201.
    The mysql_parse function has been modified to take into
    account the resulting values of the mysql_execute_command.

diff -Nrup a/sql/sql_parse.cc b/sql/sql_parse.cc
--- a/sql/sql_parse.cc	2007-07-30 20:27:30 +05:00
+++ b/sql/sql_parse.cc	2007-08-03 00:47:05 +05:00
@@ -6083,12 +6083,12 @@ void mysql_parse(THD *thd, const char *i
             thd->query_length--;
           /* Actually execute the query */
           lex->set_trg_event_type_for_tables();
-          mysql_execute_command(thd);
-          query_cache_end_of_result(thd);
+          if (!mysql_execute_command(thd))
+            query_cache_end_of_result(thd);
 	}
       }
     }
-    else
+    if (err || thd->is_fatal_error)
     {
       DBUG_ASSERT(thd->net.report_error);
       DBUG_PRINT("info",("Command aborted. Fatal_error: %d",