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Fixed a problem for Q18 from DBT3/SF30 with innodb database instance:

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the server crashed when running the query with persistent statistics
enabled.
The field KEY::read_stat.avg_frequency must be initialized to NULL
for the keys of temporary tables.
This commit is contained in:
Igor Babaev
2012-04-19 09:49:53 -07:00
parent 9e74665a2d
commit 9f53c310d8
3 changed files with 4 additions and 1 deletions
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3
sql/sql_statistics.cc
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@ -1636,6 +1636,7 @@ void set_statistics_for_table(THD *thd, TABLE *table)
key_info < key_info_end; key_info++)
{
key_info->is_statistics_from_stat_tables=
(use_stat_table_mode > 1 && key_info->read_stat.avg_frequency[0] > 0.5);
(use_stat_table_mode > 1 && key_info->read_stat.avg_frequency &&
key_info->read_stat.avg_frequency[0] > 0.5);
}
}