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bug#4497 - Serious regression if disk based TMP table is used.

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Solved performance problems by enabling write buffer.
This commit is contained in:
ingo@mysql.com
2004-08-09 11:39:26 +02:00
parent fab9fcb071
commit b88a47db3e
1 changed files with 14 additions and 0 deletions
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14
sql/sql_select.cc
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@ -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]))
{