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Fix UNION

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New faster list iterators
Change list code to be simpler and faster
Optimize count(distinct)
New error messages for UNION
Make create_tmp_table more general to be usable by UNION
This commit is contained in:
monty@tik.mysql.fi
2001-08-02 06:29:50 +03:00
parent 423f2851c5
commit b13d453d50
57 changed files with 798 additions and 472 deletions
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8
sql/sql_select.h
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@@ -118,19 +118,21 @@ typedef struct st_position { /* Used in find_best */
class TMP_TABLE_PARAM {
public:
List<Item> copy_funcs;
Copy_field *copy_field;
List_iterator_fast<Item> copy_funcs_it;
Copy_field *copy_field, *copy_field_end;
byte *group_buff;
Item_result_field **funcs;
MI_COLUMNDEF *recinfo,*start_recinfo;
KEY *keyinfo;
ha_rows end_write_records;
uint copy_field_count,field_count,sum_func_count,func_count;
uint field_count,sum_func_count,func_count;
uint hidden_field_count;
uint group_parts,group_length;
uint quick_group;
bool using_indirect_summary_function;
TMP_TABLE_PARAM() :copy_field(0), group_parts(0), group_length(0)
TMP_TABLE_PARAM()
:copy_funcs_it(copy_funcs), copy_field(0), group_parts(0), group_length(0)
{}
~TMP_TABLE_PARAM()
{