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Fixed bug #5500: EXPLAIN returned a wrong select_type for queries using views.

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Select_type in the EXPLAIN output for the query SELECT * FROM t1 was
'SIMPLE', while for the query SELECT * FROM v1, where the view v1
was defined as SELECT * FROM t1, the EXPLAIN output contained 'PRIMARY'
for the select_type column.
This commit is contained in:
igor@rurik.mysql.com
2006-09-06 08:21:43 -07:00
parent ca3229dc1b
commit b7ded1e34f
8 changed files with 71 additions and 31 deletions
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11
sql/sql_select.cc
View File

@ -14221,9 +14221,12 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
item_list.push_back(new Item_string(table_name_buffer, len, cs));
}
else
item_list.push_back(new Item_string(table->alias,
strlen(table->alias),
{
TABLE_LIST *tab=table->pos_in_table_list;
item_list.push_back(new Item_string(tab->alias,
strlen(tab->alias),
cs));
}
/* type */
item_list.push_back(new Item_string(join_type_str[tab->type],
strlen(join_type_str[tab->type]),
@ -14410,8 +14413,8 @@ bool mysql_explain_union(THD *thd, SELECT_LEX_UNIT *unit, select_result *result)
// drop UNCACHEABLE_EXPLAIN, because it is for internal usage only
uint8 uncacheable= (sl->uncacheable & ~UNCACHEABLE_EXPLAIN);
sl->type= (((&thd->lex->select_lex)==sl)?
((thd->lex->all_selects_list != sl) ?
primary_key_name : "SIMPLE"):
(sl->first_inner_unit() || sl->next_select() ?
"PRIMARY" : "SIMPLE"):
((sl == first)?
((sl->linkage == DERIVED_TABLE_TYPE) ?
"DERIVED":