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EXPLAIN on UNION"s

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mysql-test/r/union.result:
  New result for EXPLAIN UNION's
mysql-test/t/union.test:
  No error when EXPLAIN is done on UNION's
This commit is contained in:
unknown
2001-08-24 13:18:06 +03:00
parent 55e17c84b4
commit 5b95ffc52f
4 changed files with 42 additions and 24 deletions
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37
sql/sql_select.cc
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@ -6752,23 +6752,25 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
/* Don't log this into the slow query log */
join->thd->lex.select_lex.options&= ~(QUERY_NO_INDEX_USED | QUERY_NO_GOOD_INDEX_USED);
field_list.push_back(new Item_empty_string("table",NAME_LEN));
field_list.push_back(new Item_empty_string("type",10));
field_list.push_back(item=new Item_empty_string("possible_keys",
if (join->thd->lex.select == &join->thd->lex.select_lex)
{
field_list.push_back(new Item_empty_string("table",NAME_LEN));
field_list.push_back(new Item_empty_string("type",10));
field_list.push_back(item=new Item_empty_string("possible_keys",
NAME_LEN*MAX_KEY));
item->maybe_null=1;
field_list.push_back(item=new Item_empty_string("key",NAME_LEN));
item->maybe_null=1;
field_list.push_back(item=new Item_int("key_len",0,3));
item->maybe_null=1;
field_list.push_back(item=new Item_empty_string("ref",
NAME_LEN*MAX_REF_PARTS));
item->maybe_null=1;
field_list.push_back(new Item_real("rows",0.0,0,10));
field_list.push_back(new Item_empty_string("Extra",255));
if (send_fields(thd,field_list,1))
return; /* purecov: inspected */
item->maybe_null=1;
field_list.push_back(item=new Item_empty_string("key",NAME_LEN));
item->maybe_null=1;
field_list.push_back(item=new Item_int("key_len",0,3));
item->maybe_null=1;
field_list.push_back(item=new Item_empty_string("ref",
NAME_LEN*MAX_REF_PARTS));
item->maybe_null=1;
field_list.push_back(new Item_real("rows",0.0,0,10));
field_list.push_back(new Item_empty_string("Extra",255));
if (send_fields(thd,field_list,1))
return;
}
char buff[512],*buff_ptr;
String tmp(buff,sizeof(buff)),*packet= &thd->packet;
table_map used_tables=0;
@ -6899,7 +6901,8 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
// For next iteration
used_tables|=table->map;
}
send_eof(&thd->net);
if (!join->thd->lex.select->next)
send_eof(&thd->net);
DBUG_VOID_RETURN;
}