mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2026-05-15 03:17:20 +02:00
Code Issues Projects Releases Packages Wiki Activity

Applying patch from SergeyV

Browse source 
Fixes bug#17264, for alter table on win32 for successfull operation completion
it is used TL_WRITE(=10) lock instead of TL_WRITE_ALLOW_READ(=6), however here
in innodb handler TL_WRTIE is lifted to TL_WRITE_ALLOW_WRITE, which causes
race condition when several clients do alter table simultaneously.


mysql-test/r/lock_multi.result:
  Test case for bug#17264.
mysql-test/t/lock_multi.test:
  Test case for bug#17264
This commit is contained in:
unknown 2006-06-20 13:43:13 -04:00
commit b250722087
3 changed files with 43 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

11
sql/ha_innodb.cc
View file

@ -6684,6 +6684,17 @@ ha_innobase::store_lock(
&& !thd->tablespace_op
&& thd->lex->sql_command != SQLCOM_TRUNCATE
&& thd->lex->sql_command != SQLCOM_OPTIMIZE
#ifdef __WIN__
/*
for alter table on win32 for succesfull operation
completion it is used TL_WRITE(=10) lock instead of
TL_WRITE_ALLOW_READ(=6), however here in innodb handler
TL_WRITE is lifted to TL_WRITE_ALLOW_WRITE, which causes
race condition when several clients do alter table
simultaneously (bug #17264). This fix avoids the problem.
*/
&& thd->lex->sql_command != SQLCOM_ALTER_TABLE
#endif
&& thd->lex->sql_command != SQLCOM_CREATE_TABLE) {
lock_type = TL_WRITE_ALLOW_WRITE;