manually merged

configure.in:
  Auto merged
client/mysqldump.c:
  Auto merged
innobase/buf/buf0rea.c:
  Auto merged
innobase/dict/dict0load.c:
  Auto merged
innobase/fil/fil0fil.c:
  Auto merged
innobase/include/fil0fil.h:
  Auto merged
innobase/include/row0mysql.h:
  Auto merged
innobase/include/trx0trx.h:
  Auto merged
innobase/os/os0file.c:
  Auto merged
innobase/row/row0ins.c:
  Auto merged
innobase/row/row0mysql.c:
  Auto merged
innobase/row/row0sel.c:
  Auto merged
innobase/srv/srv0start.c:
  Auto merged
innobase/trx/trx0trx.c:
  Auto merged
libmysqld/lib_sql.cc:
  Auto merged
mysql-test/mysql-test-run.sh:
  Auto merged
mysql-test/r/alter_table.result:
  Auto merged
mysql-test/r/ctype_ucs.result:
  Auto merged
mysql-test/r/func_str.result:
  Auto merged
mysql-test/r/grant.result:
  Auto merged
mysql-test/r/grant_cache.result:
  Auto merged
mysql-test/r/merge.result:
  Auto merged
mysql-test/r/ndb_blob.result:
  Auto merged
mysql-test/r/ps_1general.result:
  Auto merged
mysql-test/r/subselect.result:
  Auto merged
mysql-test/r/timezone2.result:
  Auto merged
mysql-test/t/ctype_ucs.test:
  Auto merged
mysql-test/t/grant.test:
  Auto merged
mysql-test/t/merge.test:
  Auto merged
mysql-test/t/multi_update.test:
  Auto merged
mysql-test/t/mysqldump.test:
  Auto merged
mysql-test/t/subselect.test:
  Auto merged
ndb/src/ndbapi/NdbBlob.cpp:
  Auto merged
ndb/src/ndbapi/NdbConnection.cpp:
  Auto merged
ndb/src/ndbapi/NdbDictionaryImpl.cpp:
  Auto merged
ndb/src/ndbapi/NdbOperationDefine.cpp:
  Auto merged
sql/ha_innodb.cc:
  Auto merged
sql/ha_myisammrg.cc:
  Auto merged
sql/ha_myisammrg.h:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_strfunc.cc:
  Auto merged
sql/log.cc:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/set_var.cc:
  Auto merged
sql-common/client.c:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/strfunc.cc:
  Auto merged
sql/unireg.cc:
  Auto merged
vio/vio.c:
  Auto merged
vio/viosocket.c:
  Auto merged

1 files changed, 1 insertions, 19 deletions

diff --git a/innobase/include/row0mysql.h b/innobase/include/row0mysql.h
index c23a0e025ad..bd5ad3adba5 100644
--- a/innobase/include/row0mysql.h
+++ b/innobase/include/row0mysql.h
@@ -378,25 +378,7 @@ row_drop_table_for_mysql(
 /*************************************************************************
 Discards the tablespace of a table which stored in an .ibd file. Discarding
 means that this function deletes the .ibd file and assigns a new table id for
-the table. Also the flag table->ibd_file_missing is set TRUE.
-
-How do we prevent crashes caused by ongoing operations on the table? Old
-operations could try to access non-existent pages.
-
-1) SQL queries, INSERT, SELECT, ...: we must get an exclusive MySQL table lock
-on the table before we can do DISCARD TABLESPACE. Then there are no running
-queries on the table.
-2) Purge and rollback: we assign a new table id for the table. Since purge and
-rollback look for the table based on the table id, they see the table as
-'dropped' and discard their operations.
-3) Insert buffer: we remove all entries for the tablespace in the insert
-buffer tree; as long as the tablespace mem object does not exist, ongoing
-insert buffer page merges are discarded in buf0rea.c. If we recreate the
-tablespace mem object with IMPORT TABLESPACE later, then the tablespace will
-have the same id, but the tablespace_version field in the mem object is
-different, and ongoing old insert buffer page merges get discarded.
-4) Linear readahead and random readahead: we use the same method as in 3) to
-discard ongoing operations. */
+the table. Also the flag table->ibd_file_missing is set TRUE. */
 
 int
 row_discard_tablespace_for_mysql(