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added comments to simple_order, simple_group, no_order, skip_sort_order

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unknown 2003-11-20 21:21:56 +03:00
parent 24bdf95603
commit cd878c2c8a
1 changed files with 15 additions and 2 deletions
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17
sql/sql_select.cc
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@ -208,8 +208,21 @@ mysql_select(THD *thd,TABLE_LIST *tables,List<Item> &fields,COND *conds,
{ {
TABLE *tmp_table; TABLE *tmp_table;
int error, tmp_error; int error, tmp_error;
bool need_tmp,hidden_group_fields; bool need_tmp;
bool simple_order,simple_group,no_order, skip_sort_order; bool hidden_group_fields;
/*
simple_xxxxx is set if ORDER/GROUP BY doesn't include any references
to other tables than the first non-constant table in the JOIN.
It's also set if ORDER/GROUP BY is empty.
*/
bool simple_order, simple_group;
/*
Is set only in case if we have a GROUP BY clause
and no ORDER BY after constant elimination of 'order'.
*/
bool no_order;
/* Is set if we have a GROUP BY and we have ORDER BY on a constant. */
bool skip_sort_order;
ha_rows select_limit; ha_rows select_limit;
Item::cond_result cond_value; Item::cond_result cond_value;
SQL_SELECT *select; SQL_SELECT *select;