mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-01-29 10:14:19 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

ha_innodb.cc:

Browse source 
Convert TL_READ_NO_INSERT to TL_READ to allow concurrent inserts to the table in INSERT INTO ... SELECT ... FROM table


sql/ha_innodb.cc:
  Convert TL_READ_NO_INSERT to TL_READ to allow concurrent inserts to the table in INSERT INTO ... SELECT ... FROM table
This commit is contained in:
unknown 2003-01-21 00:38:55 +02:00
parent f6cbace93e
commit d5833961ce
1 changed files with 10 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
sql/ha_innodb.cc
View file

@ -4166,6 +4166,16 @@ ha_innobase::store_lock(
lock_type = TL_WRITE_ALLOW_WRITE;
}
/* In queries of type INSERT INTO t1 SELECT ... FROM t2 ...
MySQL would use the lock TL_READ_NO_INSERT on t2, and that
would conflict with TL_WRITE_ALLOW_WRITE, blocking all inserts
to t2. Convert the lock to a normal read lock to allow
concurrent inserts to t2. */
if (lock_type == TL_READ_NO_INSERT && !thd->in_lock_tables) {
lock_type = TL_READ;
}
lock.type=lock_type;
}