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MDEV-406: ANALYZE $stmt: Scans that never executed will have r_rows=NULL

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This commit is contained in:
Sergei Petrunia
2014-06-24 23:58:13 +04:00
parent 06a87d77e6
commit c3cfb6910a
4 changed files with 31 additions and 8 deletions
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30
sql/sql_explain.cc
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@@ -553,9 +553,16 @@ int Explain_table_access::print_explain(select_result_sink *output, uint8 explai
/* `r_rows` */
if (is_analyze)
{
ha_rows avg_rows= tracker.get_avg_rows();
item_list.push_back(new Item_int((longlong) (ulonglong) avg_rows,
MY_INT64_NUM_DECIMAL_DIGITS));
if (!tracker.has_scans())
{
item_list.push_back(item_null);
}
else
{
ha_rows avg_rows= tracker.get_avg_rows();
item_list.push_back(new Item_int((longlong) (ulonglong) avg_rows,
MY_INT64_NUM_DECIMAL_DIGITS));
}
}
/* `filtered` */
@@ -572,12 +579,19 @@ int Explain_table_access::print_explain(select_result_sink *output, uint8 explai
/* `r_filtered` */
if (is_analyze)
{
double r_filtered;
if (tracker.r_rows > 0)
r_filtered= 100.0 * (double)tracker.r_rows_after_table_cond / tracker.r_rows;
if (!tracker.has_scans())
{
item_list.push_back(item_null);
}
else
r_filtered= 100.0;
item_list.push_back(new Item_float(r_filtered, 2));
{
double r_filtered;
if (tracker.r_rows > 0)
r_filtered= 100.0 * (double)tracker.r_rows_after_table_cond / tracker.r_rows;
else
r_filtered= 100.0;
item_list.push_back(new Item_float(r_filtered, 2));
}
}
/* `Extra` */