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Fixed bug mdev-518.

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If some statistical tables are corrupted the server should use
the conventional statistical data.
This commit is contained in:
Igor Babaev
2012-09-11 22:36:04 -07:00
parent ff36e9fc51
commit 2bbcec4148
4 changed files with 61 additions and 3 deletions
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8
sql/sql_statistics.cc
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@ -2908,15 +2908,17 @@ void set_statistics_for_table(THD *thd, TABLE *table)
{
uint use_stat_table_mode= thd->variables.use_stat_tables;
table->used_stat_records=
(use_stat_table_mode <= 1 || !table->s->read_stats ||
table->s->read_stats->cardinality_is_null) ?
(use_stat_table_mode <= 1 ||
!table->s->stats_is_read || !table->s->read_stats ||
table->s->read_stats->cardinality_is_null) ?
table->file->stats.records : table->s->read_stats->cardinality;
KEY *key_info, *key_info_end;
for (key_info= table->key_info, key_info_end= key_info+table->s->keys;
key_info < key_info_end; key_info++)
{
key_info->is_statistics_from_stat_tables=
(use_stat_table_mode > 1 && key_info->read_stats &&
(use_stat_table_mode > 1 && table->s->stats_is_read &&
key_info->read_stats &&
key_info->read_stats->avg_frequency_is_inited() &&
key_info->read_stats->get_avg_frequency(0) > 0.5);
}