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Applied Monty corrections to the FULL SCAN

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optimiser bug patch.
This commit is contained in:
kostja@oak.local
2003-09-17 21:52:05 +04:00
parent f13d9312a7
commit 6fba16eabf
3 changed files with 43 additions and 32 deletions
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6
mysql-test/r/distinct.result
View File

@@ -173,9 +173,9 @@ INSERT INTO t2 values (1),(2),(3);
INSERT INTO t3 VALUES (1,'1'),(2,'2'),(1,'1'),(2,'2');
explain SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
table type possible_keys key key_len ref rows Extra
t2 index a a 4 NULL 5 Using index; Using temporary
t1 eq_ref PRIMARY PRIMARY 4 t2.a 1
t3 index a a 5 NULL 5 Using where; Using index
t3 index a a 5 NULL 6 Using index; Using temporary
t2 index a a 4 NULL 5 Using index; Distinct
t1 eq_ref PRIMARY PRIMARY 4 t2.a 1 Using where; Distinct
SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
a
1

14
mysql-test/r/order_by.result
View File

@@ -307,17 +307,17 @@ table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 8 Using where; Using index
explain select * from t1 where a = 2 and b >0 order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 4 Using where; Using index
t1 range a a 9 NULL 5 Using where; Using index
explain select * from t1 where a = 2 and b is null order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 ref a a 9 const,const 1 Using where; Using index; Using filesort
explain select * from t1 where a = 2 and (b is null or b > 0) order by a
desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 5 Using where; Using index
t1 range a a 9 NULL 6 Using where; Using index
explain select * from t1 where a = 2 and b > 0 order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 4 Using where; Using index
t1 range a a 9 NULL 5 Using where; Using index
explain select * from t1 where a = 2 and b < 2 order by a desc,b desc;
table type possible_keys key key_len ref rows Extra
t1 range a a 9 NULL 2 Using where; Using index
@@ -466,8 +466,8 @@ t2 eq_ref PRIMARY,uid PRIMARY 4 t1.gid 1
t3 eq_ref PRIMARY PRIMARY 2 t2.uid 1 Using where; Using index
EXPLAIN SELECT t1.gid, t3.uid from t1, t3 where t1.gid = t3.uid order by t1.gid,t3.skr;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 6 Using index
t3 eq_ref PRIMARY PRIMARY 2 t1.gid 1 Using where
t3 ALL PRIMARY NULL NULL NULL 6 Using temporary; Using filesort
t1 eq_ref PRIMARY PRIMARY 4 t3.uid 1 Using where; Using index
EXPLAIN SELECT t1.gid, t2.sid, t3.uid from t2, t1, t3 where t2.gid = t1.gid and t2.uid = t3.uid order by t3.uid, t1.gid;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 6 Using index; Using temporary; Using filesort
@@ -475,8 +475,8 @@ t2 eq_ref PRIMARY,uid PRIMARY 4 t1.gid 1
t3 eq_ref PRIMARY PRIMARY 2 t2.uid 1 Using where; Using index
EXPLAIN SELECT t1.gid, t3.uid from t1, t3 where t1.gid = t3.uid order by t3.skr,t1.gid;
table type possible_keys key key_len ref rows Extra
t1 index PRIMARY PRIMARY 4 NULL 6 Using index; Using temporary; Using filesort
t3 eq_ref PRIMARY PRIMARY 2 t1.gid 1 Using where
t3 ALL PRIMARY NULL NULL NULL 6 Using temporary; Using filesort
t1 eq_ref PRIMARY PRIMARY 4 t3.uid 1 Using where; Using index
EXPLAIN SELECT t1.gid, t3.uid from t1, t3 where t1.skr = t3.uid order by t1.gid,t3.skr;
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort