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merge

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bell@sanja.is.com.ua
2004-11-11 21:18:10 +02:00
parent aa6d99dd0a c8d5f8991d
commit 0ef0b030a5
51 changed files with 1256 additions and 268 deletions
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111
sql/sql_view.cc
View File

@ -491,17 +491,25 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view,
{
/* TODO: change here when we will support UNIONs */
for (TABLE_LIST *tbl= (TABLE_LIST *)lex->select_lex.table_list.first;
tbl;
tbl= tbl->next_local)
tbl;
tbl= tbl->next_local)
{
if (tbl->view && !tbl->updatable_view)
{
view->updatable_view= 0;
break;
view->updatable_view= 0;
break;
}
for (TABLE_LIST *up= tbl; up; up= up->embedding)
{
if (up->outer_join)
{
view->updatable_view= 0;
goto loop_out;
}
}
}
}
loop_out:
/*
Check that table of main select do not used in subqueries.
@ -567,6 +575,7 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
SELECT_LEX *end;
THD *thd= current_thd;
LEX *old_lex= thd->lex, *lex;
SELECT_LEX *view_select;
int res= 0;
/*
@ -609,7 +618,8 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
*/
table->view= lex= thd->lex= (LEX*) new(thd->mem_root) st_lex_local;
lex_start(thd, (uchar*)table->query.str, table->query.length);
lex->select_lex.select_number= ++thd->select_number;
view_select= &lex->select_lex;
view_select->select_number= ++thd->select_number;
old_lex->derived_tables|= DERIVED_VIEW;
{
ulong options= thd->options;
@ -652,6 +662,7 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
table);
TABLE_LIST *view_tables= lex->query_tables;
TABLE_LIST *view_tables_tail= 0;
TABLE_LIST *tbl;
if (lex->spfuns.records)
{
@ -710,7 +721,7 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
old_lex->safe_to_cache_query= (old_lex->safe_to_cache_query &&
lex->safe_to_cache_query);
/* move SQL_CACHE to whole query */
if (lex->select_lex.options & OPTION_TO_QUERY_CACHE)
if (view_select->options & OPTION_TO_QUERY_CACHE)
old_lex->select_lex.options|= OPTION_TO_QUERY_CACHE;
/*
@ -747,9 +758,6 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
old_lex->can_use_merged()) &&
!old_lex->can_not_use_merged())
{
/*
TODO: support multi tables substitutions
*/
/* lex should contain at least one table */
DBUG_ASSERT(view_tables != 0);
@ -759,20 +767,48 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
table->effective_with_check= table->with_check;
table->ancestor= view_tables;
/*
next table should include SELECT_LEX under this table SELECT_LEX
TODO: here should be loop for multi tables substitution
*/
/* next table should include SELECT_LEX under this table SELECT_LEX */
table->ancestor->select_lex= table->select_lex;
/*
move lock type (TODO: should we issue error in case of TMPTABLE
algorithm and non-read locking)?
Process upper level tables of view. As far as we do noy suport union
here we can go through local tables of view most upper SELECT
*/
view_tables->lock_type= table->lock_type;
for(tbl= (TABLE_LIST*)view_select->table_list.first;
tbl;
tbl= tbl->next_local)
{
/*
move lock type (TODO: should we issue error in case of TMPTABLE
algorithm and non-read locking)?
*/
tbl->lock_type= table->lock_type;
}
/* multi table view */
if (view_tables->next_local)
{
/* make nested join structure for view tables */
NESTED_JOIN *nested_join;
if (!(nested_join= table->nested_join=
(NESTED_JOIN *) thd->calloc(sizeof(NESTED_JOIN))))
goto err;
nested_join->join_list= view_select->top_join_list;
/* re-nest tables of VIEW */
{
List_iterator_fast<TABLE_LIST> ti(nested_join->join_list);
while(tbl= ti++)
{
tbl->join_list= &nested_join->join_list;
tbl->embedding= table;
}
}
}
/* Store WHERE clause for post-processing in setup_ancestor */
table->where= lex->select_lex.where;
table->where= view_select->where;
/*
Add subqueries units to SELECT in which we merging current view.
@ -799,13 +835,13 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
table->effective_algorithm= VIEW_ALGORITHM_TMPTABLE;
DBUG_PRINT("info", ("algorithm: TEMPORARY TABLE"));
lex->select_lex.linkage= DERIVED_TABLE_TYPE;
view_select->linkage= DERIVED_TABLE_TYPE;
table->updatable= 0;
table->effective_with_check= VIEW_CHECK_NONE;
/* SELECT tree link */
lex->unit.include_down(table->select_lex);
lex->unit.slave= &lex->select_lex; // fix include_down initialisation
lex->unit.slave= view_select; // fix include_down initialisation
table->derived= &lex->unit;
}
@ -816,7 +852,7 @@ ok:
if (arena)
thd->restore_backup_item_arena(arena, &backup);
/* global SELECT list linking */
end= &lex->select_lex; // primary SELECT_LEX is always last
end= view_select; // primary SELECT_LEX is always last
end->link_next= old_lex->all_selects_list;
old_lex->all_selects_list->link_prev= &end->link_next;
old_lex->all_selects_list= lex->all_selects_list;
@ -953,24 +989,26 @@ frm_type_enum mysql_frm_type(char *path)
bool check_key_in_view(THD *thd, TABLE_LIST *view)
{
TABLE *table;
Item **trans;
Field_translator *trans;
KEY *key_info, *key_info_end;
uint i, elements_in_view;
DBUG_ENTER("check_key_in_view");
/*
we do not support updatable UNIONs in VIW, so we can check just limit of
we do not support updatable UNIONs in VIEW, so we can check just limit of
LEX::select_lex
*/
if (!view->view || thd->lex->sql_command == SQLCOM_INSERT ||
if ((!view->view && !view->belong_to_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;
if (view->belong_to_view)
view= view->belong_to_view;
trans= view->field_translation;
key_info_end= (key_info= table->key_info)+ table->keys;
elements_in_view= view->view->select_lex.item_list.elements;
DBUG_ASSERT(view->table != 0 && view->field_translation != 0);
DBUG_ASSERT(table != 0 && view->field_translation != 0);
/* Loop over all keys to see if a unique-not-null key is used */
for (;key_info != key_info_end ; key_info++)
@ -987,7 +1025,7 @@ bool check_key_in_view(THD *thd, TABLE_LIST *view)
for (k= 0; k < elements_in_view; k++)
{
Item_field *field;
if ((field= trans[k]->filed_for_view_update()) &&
if ((field= trans[k].item->filed_for_view_update()) &&
field->field == key_part->field)
break;
}
@ -1008,7 +1046,7 @@ bool check_key_in_view(THD *thd, TABLE_LIST *view)
for (i= 0; i < elements_in_view; i++)
{
Item_field *field;
if ((field= trans[i]->filed_for_view_update()) &&
if ((field= trans[i].item->filed_for_view_update()) &&
field->field == *field_ptr)
break;
}
@ -1042,22 +1080,31 @@ bool check_key_in_view(THD *thd, TABLE_LIST *view)
insert_view_fields()
list list for insertion
view view for processing
RETURN
0 - OK
-1 - error (is not sent to cliet)
*/
void insert_view_fields(List<Item> *list, TABLE_LIST *view)
int insert_view_fields(List<Item> *list, TABLE_LIST *view)
{
uint elements_in_view= view->view->select_lex.item_list.elements;
Item **trans;
Field_translator *trans;
DBUG_ENTER("insert_view_fields");
if (!(trans= view->field_translation))
DBUG_VOID_RETURN;
DBUG_RETURN(0);
for (uint i= 0; i < elements_in_view; i++)
{
Item_field *fld;
if ((fld= trans[i]->filed_for_view_update()))
if ((fld= trans[i].item->filed_for_view_update()))
list->push_back(fld);
else
{
my_error(ER_NON_UPDATABLE_TABLE, MYF(0), view->alias, "INSERT");
DBUG_RETURN(-1);
}
}
DBUG_VOID_RETURN;
DBUG_RETURN(0);
}