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fixed optimized SOME subquery

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mysql-test/r/subselect.result:
  correct results of SOME subquery
sql/item_cmpfunc.cc:
  some comments added
  fixed optimized SOME subquery
This commit is contained in:
unknown 2004-12-13 01:21:14 +02:00
parent 3ce0df5937
commit a9457c573d
2 changed files with 4 additions and 10 deletions
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6
mysql-test/r/subselect.result
View file

@ -1490,9 +1490,6 @@ Warnings:
Note 1003 select test.t3.a AS `a` from test.t3 where <not>((test.t3.a < (select max(test.t2.b) from test.t2)))
select * from t3 where a >= some (select b from t2);
a
6
7
3
explain extended select * from t3 where a >= some (select b from t2);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 3 Using where
@ -1512,9 +1509,6 @@ Warnings:
Note 1003 select test.t3.a AS `a` from test.t3 where <not>((test.t3.a < <max>(select test.t2.b AS `b` from test.t2 group by test.t2.b)))
select * from t3 where a >= some (select b from t2 group by 1);
a
6
7
3
explain extended select * from t3 where a >= some (select b from t2 group by 1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 3 Using where

8
sql/item_cmpfunc.cc
View file

@ -120,7 +120,7 @@ longlong Item_func_not_all::val_int()
/*
return TRUE if there was records in underlaying select in max/min
optimisation
optimisation (ALL subquery)
*/
if (empty_underlying_subquery())
return 1;
@ -157,11 +157,11 @@ longlong Item_func_nop_all::val_int()
double value= args[0]->val();
/*
return TRUE if there was records in underlaying select in max/min
optimisation
return FALSE if there was records in underlaying select in max/min
optimisation (SAME/ANY subquery)
*/
if (empty_underlying_subquery())
return 1;
return 0;
null_value= args[0]->null_value;
return (null_value || value == 0) ? 0 : 1;