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allow merging views with subqueries in WHERE clause (BUG#5504)

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mysql-test/r/view.result:
  test of subqueries in merged views
mysql-test/t/view.test:
  test of subqueries in merged views
sql/item_subselect.h:
  new method tu return place of subquery
sql/sql_lex.cc:
  allow merging views with subqueries in WHERE clause
sql/sql_view.cc:
  allow merging views with subqueries in WHERE clause
This commit is contained in:
unknown 2004-10-07 22:54:31 +03:00
commit 1e623bb9c3
5 changed files with 110 additions and 12 deletions
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22
sql/sql_view.cc
View file

@ -753,6 +753,20 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
/* Store WHERE clause for post-processing in setup_ancestor */
table->where= lex->select_lex.where;
/*
Add subqueries units to SELECT in which we merging current view.
NOTE: we do not support UNION here, so we take only one select
*/
for (SELECT_LEX_UNIT *unit= lex->select_lex.first_inner_unit();
unit;
unit= unit->next_unit())
{
SELECT_LEX_NODE *save_slave= unit->slave;
unit->include_down(table->select_lex);
unit->slave= save_slave; // fix include_down initialisation
}
/*
This SELECT_LEX will be linked in global SELECT_LEX list
to make it processed by mysql_handle_derived(),
@ -923,8 +937,12 @@ bool check_key_in_view(THD *thd, TABLE_LIST *view)
uint i, elements_in_view;
DBUG_ENTER("check_key_in_view");
if (!view->view ||
thd->lex->unit.global_parameters->select_limit == HA_POS_ERROR)
/*
we do not support updatable UNIONs in VIW, so we can check just limit of
LEX::select_lex
*/
if (!view->view || thd->lex->sql_command == SQLCOM_INSERT ||
thd->lex->select_lex.select_limit == HA_POS_ERROR)
DBUG_RETURN(FALSE); /* it is normal table or query without LIMIT */
table= view->table;
trans= view->field_translation;