diff options
Diffstat (limited to 'sql/sql_select.cc')
| -rw-r--r-- | sql/sql_select.cc | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 46e1a912250..5075673dcc2 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -8125,9 +8125,11 @@ best_extension_by_limited_search(JOIN *join, best_access_path(join, s, remaining_tables, idx, disable_jbuf, record_count, join->positions + idx, &loose_scan_pos); - /* Compute the cost of extending the plan with 's' */ - - current_record_count= record_count * position->records_read; + /* Compute the cost of extending the plan with 's', avoid overflow */ + if (position->records_read < DBL_MAX / record_count) + current_record_count= record_count * position->records_read; + else + current_record_count= DBL_MAX; current_read_time=read_time + position->read_time + current_record_count / (double) TIME_FOR_COMPARE; |