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Fixed bug #26159.

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A wrong order of statements in QUICK_GROUP_MIN_MAX_SELECT::reset
caused a crash when a query with DISTINCT was executed by a loose scan
for an InnoDB table that had been emptied.
This commit is contained in:
igor@olga.mysql.com
2007-02-10 23:55:56 -08:00
parent 3fe9de2879
commit 976e747aaf
3 changed files with 57 additions and 5 deletions
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9
sql/opt_range.cc
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@@ -8765,14 +8765,13 @@ int QUICK_GROUP_MIN_MAX_SELECT::reset(void)
DBUG_ENTER("QUICK_GROUP_MIN_MAX_SELECT::reset");
file->extra(HA_EXTRA_KEYREAD); /* We need only the key attributes */
result= file->ha_index_init(index);
result= file->index_last(record);
if (result == HA_ERR_END_OF_FILE)
DBUG_RETURN(0);
if (result)
if ((result= file->ha_index_init(index)))
DBUG_RETURN(result);
if (quick_prefix_select && quick_prefix_select->reset())
DBUG_RETURN(1);
result= file->index_last(record);
if (result == HA_ERR_END_OF_FILE)
DBUG_RETURN(0);
/* Save the prefix of the last group. */
key_copy(last_prefix, record, index_info, group_prefix_len);