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resolving conflicts

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This commit is contained in:
unknown 2004-03-30 16:04:08 +05:00
commit b26165d3a2
4 changed files with 48 additions and 39 deletions
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6
mysql-test/r/join.result
View File

@ -277,11 +277,11 @@ CREATE TABLE t2 (ID INTEGER NOT NULL PRIMARY KEY, Value2 VARCHAR(255));
INSERT INTO t1 VALUES (1, 'A');
INSERT INTO t2 VALUES (1, 'B');
SELECT * FROM t1 NATURAL JOIN t2 WHERE 1 AND (Value1 = 'A' AND Value2 <> 'B');
ID Value1 ID Value2
ID Value1 Value2
SELECT * FROM t1 NATURAL JOIN t2 WHERE 1 AND Value1 = 'A' AND Value2 <> 'B';
ID Value1 ID Value2
ID Value1 Value2
SELECT * FROM t1 NATURAL JOIN t2 WHERE (Value1 = 'A' AND Value2 <> 'B') AND 1;
ID Value1 ID Value2
ID Value1 Value2
drop table t1,t2;
create table t1 (i int);
create table t2 (i int);

12
mysql-test/r/join_outer.result
View File

@ -124,8 +124,8 @@ grp a c id a c d
3 5 C 3 5 B 5
3 6 D 3 6 C 6
select t1.*,t2.* from t1 natural join t2;
grp a c id a c d
1 1 a 1 1 a 1
grp a c id d
1 1 a 1 1
drop table t1,t2;
CREATE TABLE t1 (
usr_id INT unsigned NOT NULL,
@ -467,10 +467,10 @@ count color
15 white
7 green
select * from t2 natural join t1;
count color color name
10 green green lime
7 green green lime
5 black black grape
count color name
10 green lime
7 green lime
5 black grape
select t2.count, t1.name from t2 natural join t1;
count name
10 lime

8
mysql-test/r/select.result
View File

@ -2279,10 +2279,10 @@ a a a
2 2 2
3 3 3
select * from t1 natural join (t1 as t2 left join t1 as t3 using (a));
a a a
1 1 1
2 2 2
3 3 3
a a
1 1
2 2
3 3
select * from (t1 as t2 left join t1 as t3 using (a)) natural join t1;
a a a
1 1 1

39
sql/sql_base.cc
View File

@ -2293,14 +2293,27 @@ insert_fields(THD *thd,TABLE_LIST *tables, const char *db_name,
DBUG_RETURN(-1);
#endif
Field **ptr=table->field,*field;
TABLE *natural_join_table;
thd->used_tables|=table->map;
if (table->outer_join ||
!tables->natural_join ||
tables->natural_join->table->outer_join)
natural_join_table= NULL;
else
natural_join_table= tables->natural_join->table;
while ((field = *ptr++))
{
/* Skip duplicate field names if NATURAL JOIN is used */
if (!natural_join_table ||
!find_field_in_table(thd, natural_join_table, field->field_name,
strlen(field->field_name), 0, 0))
{
Item_field *item= new Item_field(field);
if (!found++)
(void) it->replace(item); // Replace '*'
else
it->after(item);
}
/*
Mark if field used before in this select.
Used by 'insert' to verify if a field name is used twice
@ -2383,27 +2396,23 @@ int setup_conds(THD *thd,TABLE_LIST *tables,COND **conds)
DBUG_RETURN(1);
cond_and->top_level_item();
uint i,j;
for (i=0 ; i < t1->fields ; i++)
Field **t1_field, *t2_field;
for (t1_field= t1->field; (*t1_field); t1_field++)
{
// TODO: This could be optimized to use hashed names if t2 had a hash
for (j=0 ; j < t2->fields ; j++)
const char *t1_field_name= (*t1_field)->field_name;
if ((t2_field= find_field_in_table(thd, t2, t1_field_name,
strlen(t1_field_name), 0, 0)))
{
if (!my_strcasecmp(system_charset_info,
t1->field[i]->field_name,
t2->field[j]->field_name))
{
Item_func_eq *tmp= new Item_func_eq(new Item_field(t1->field[i]),
new Item_field(t2->field[j]));
Item_func_eq *tmp=new Item_func_eq(new Item_field(*t1_field),
new Item_field(t2_field));
if (!tmp)
DBUG_RETURN(1);
/* Mark field used for table cache */
t1->field[i]->query_id=t2->field[j]->query_id=thd->query_id;
(*t1_field)->query_id= t2_field->query_id= thd->query_id;
cond_and->list.push_back(tmp);
t1->used_keys.intersect(t1->field[i]->part_of_key);
t2->used_keys.intersect(t2->field[j]->part_of_key);
break;
}
t1->used_keys.intersect((*t1_field)->part_of_key);
t2->used_keys.intersect(t2_field->part_of_key);
}
}
thd->lex->current_select->cond_count+= cond_and->list.elements;