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New alternate UNION syntax and bug fix for multi-table deletes

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This commit is contained in:
Sinisa@sinisa.nasamreza.org
2001-10-25 14:41:49 +03:00
parent 386b5ad183
commit 006ff09c34
6 changed files with 42 additions and 44 deletions
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11
sql/sql_union.cc
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@ -27,7 +27,7 @@
int mysql_union(THD *thd, LEX *lex,select_result *result)
{
SELECT_LEX *sl, *last_sl, lex_sl;
SELECT_LEX *sl, *last_sl=(SELECT_LEX *)NULL, lex_sl;
ORDER *order;
List<Item> item_list;
TABLE *table;
@ -38,7 +38,7 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
DBUG_ENTER("mysql_union");
/* Fix tables 'to-be-unioned-from' list to point at opened tables */
for (sl=&lex->select_lex; sl && sl->linkage != NOT_A_SELECT; sl=sl->next)
for (sl=&lex->select_lex; sl && sl->linkage != NOT_A_SELECT; last_sl=sl, sl=sl->next)
{
for (TABLE_LIST *cursor= (TABLE_LIST *)sl->table_list.first;
cursor;
@ -50,6 +50,7 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
{
lex_sl=*sl;
sl=(SELECT_LEX *)NULL;
if (last_sl) last_sl->next=sl;
}
else
lex_sl.linkage=UNSPECIFIED_TYPE;
@ -68,7 +69,7 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
sl->item_list,
sl->where,
sl->ftfunc_list,
(sl->braces) ? (ORDER*) 0 : (ORDER *) sl->order_list.first,
(sl->braces) ? (ORDER *) sl->order_list.first : (ORDER *) 0,
(ORDER*) sl->group_list.first,
sl->having,
(ORDER*) NULL,
@ -79,7 +80,7 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
DBUG_RETURN(0);
}
order = (lex_sl.linkage == UNSPECIFIED_TYPE) ? (ORDER *) last_sl->order_list.first : (ORDER *) lex_sl.order_list.first;
order = (lex_sl.linkage == UNSPECIFIED_TYPE) ? ( (last_sl->braces) ? (ORDER *) 0 : (ORDER *) last_sl->order_list.first) : (ORDER *) lex_sl.order_list.first;
{
Item *item;
@ -127,7 +128,7 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
sl->item_list,
sl->where,
sl->ftfunc_list,
(sl->braces) ? (ORDER*) 0 : (ORDER *)sl->order_list.first,
(sl->braces) ? (ORDER *)sl->order_list.first : (ORDER *) 0,
(ORDER*) sl->group_list.first,
sl->having,
(ORDER*) NULL,