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Bug#44653: Server crash noticed when executing random queries with partitions.

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When opening a table, it is imperative that the flag
TABLE::auto_increment_field_not_null be false. But if an error occured during
the creation of a table (e.g. the table exists already) with an auto_increment
column and a BEFORE trigger that used the INSERT ... SELECT construct, the
flag was not reset until after error checking. Thus if an error occured,
select_insert::send_data() returned immediately and it was not reset (see * in
pseudocode below).  Crash happened if the table was opened again. Fixed by
resetting the flag after error checking.

nested-loops_join():
  for each row in SELECT table {
    select_insert::send_data():
      if a values is supplied for AUTO_INCREMENT column
         table->auto_increment_field_not_null= TRUE
       else
         table->auto_increment_field_not_null= FALSE
       if (error)
         return 1; *
       if (table->auto_increment_field_not_null == FALSE)
         ...
       table->auto_increment_field_not_null == FALSE 
  }
<-- table returned to table cache and later retrieved by open_table: 
open_table():
  assert(table->auto_increment_field_not_null)
This commit is contained in:
Martin Hansson
2009-06-22 14:51:33 +02:00
parent a141a6375a
commit 2cc1134c2c
3 changed files with 43 additions and 0 deletions
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26
mysql-test/t/trigger.test
View File

@@ -2370,4 +2370,30 @@ drop trigger trg1;
drop trigger trg2;
drop table t1, t2;
#
# Bug#44653: Server crash noticed when executing random queries with partitions.
#
CREATE TABLE t1 ( a INT, b INT );
CREATE TABLE t2 ( a INT AUTO_INCREMENT KEY, b INT );
INSERT INTO t1 (a) VALUES (1);
delimiter //;
CREATE TRIGGER tr1
BEFORE INSERT ON t2
FOR EACH ROW
BEGIN
UPDATE a_nonextisting_table SET a = 1;
END//
delimiter ;//
--disable_abort_on_error
CREATE TABLE IF NOT EXISTS t2 ( a INT, b INT ) SELECT a, b FROM t1;
--enable_abort_on_error
# Caused failed assertion
SELECT * FROM t2;
DROP TABLE t1, t2;
--echo End of 5.1 tests.