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Kirill Smelkov
mariadb
Commits
b88a47db
Commit
b88a47db
authored
20 years ago
by
ingo@mysql.com
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bug#4497 - Serious regression if disk based TMP table is used.
Solved performance problems by enabling write buffer.
parent
fab9fcb0
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sql/sql_select.cc
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sql/sql_select.cc
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b88a47db
...
...
@@ -4533,6 +4533,20 @@ bool create_myisam_from_heap(THD *thd, TABLE *table, TMP_TABLE_PARAM *param,
new_table
.
no_rows
=
1
;
}
#ifdef TO_BE_DONE_LATER_IN_4_1
/*
To use start_bulk_insert() (which is new in 4.1) we need to find
all places where a corresponding end_bulk_insert() should be put.
*/
table
->
file
->
info
(
HA_STATUS_VARIABLE
);
/* update table->file->records */
new_table
.
file
->
start_bulk_insert
(
table
->
file
->
records
);
#else
/*
HA_EXTRA_WRITE_CACHE can stay until close, no need to disable it explicitly.
*/
new_table
.
file
->
extra
(
HA_EXTRA_WRITE_CACHE
);
#endif
/* copy all old rows */
while
(
!
table
->
file
->
rnd_next
(
new_table
.
record
[
1
]))
{
...
...
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