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new EXPLAIN

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fixed bug in mysql-test/create-test-result
fixed bug in union-subselect engine
This commit is contained in:
bell@sanja.is.com.ua
2002-09-26 23:08:22 +03:00
parent d9989c635e
commit 46a22a5be7
36 changed files with 607 additions and 457 deletions
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74
mysql-test/r/select.result
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@ -1327,20 +1327,20 @@ fld3
select t2.fld3 from t2 where fld3 LIKE 'don_t_find_me_please%';
fld3
explain select t2.fld3 from t2 where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 ref fld3 fld3 30 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ref fld3 fld3 30 const 1 where used; Using index
explain select fld3 from t2 ignore index (fld3) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 index NULL fld3 30 NULL 1199 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 index NULL fld3 30 NULL 1199 where used; Using index
explain select fld3 from t2 use index (fld1) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 index NULL fld3 30 NULL 1199 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 index NULL fld3 30 NULL 1199 where used; Using index
explain select fld3 from t2 use index (fld3) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 ref fld3 fld3 30 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ref fld3 fld3 30 const 1 where used; Using index
explain select fld3 from t2 use index (fld1,fld3) where fld3 = 'honeysuckle';
table type possible_keys key key_len ref rows Extra
t2 ref fld3 fld3 30 const 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ref fld3 fld3 30 const 1 where used; Using index
explain select fld3 from t2 ignore index (fld3,not_used);
Key column 'not_used' doesn't exist in table
explain select fld3 from t2 use index (not_used);
@ -1350,8 +1350,8 @@ fld3
honeysuckle
honoring
explain select t2.fld3 from t2 where fld3 >= 'honeysuckle' and fld3 <= 'honoring' order by fld3;
table type possible_keys key key_len ref rows Extra
t2 range fld3 fld3 30 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 range fld3 fld3 30 NULL 2 where used; Using index
select fld1,fld3 from t2 where fld3="Colombo" or fld3 = "nondecreasing" order by fld3;
fld1 fld3
148504 Colombo
@ -1370,8 +1370,8 @@ fld1
250501
250502
explain select fld1 from t2 where fld1=250501 or fld1="250502";
table type possible_keys key key_len ref rows Extra
t2 range fld1 fld1 4 NULL 2 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 range fld1 fld1 4 NULL 2 where used; Using index
select fld1 from t2 where fld1=250501 or fld1=250502 or fld1 >= 250505 and fld1 <= 250601 or fld1 between 250501 and 250502;
fld1
250501
@ -1379,8 +1379,8 @@ fld1
250505
250601
explain select fld1 from t2 where fld1=250501 or fld1=250502 or fld1 >= 250505 and fld1 <= 250601 or fld1 between 250501 and 250502;
table type possible_keys key key_len ref rows Extra
t2 range fld1 fld1 4 NULL 4 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 range fld1 fld1 4 NULL 4 where used; Using index
select fld1,fld3 from t2 where companynr = 37 and fld3 like 'f%';
fld1 fld3
218401 faithful
@ -1806,9 +1806,9 @@ companynr rtrim(space(512+companynr))
select distinct fld3 from t2,t3 where t2.companynr = 34 and t2.fld1=t3.t2nr order by fld3;
fld3
explain select t3.t2nr,fld3 from t2,t3 where t2.companynr = 34 and t2.fld1=t3.t2nr order by t3.t2nr,fld3;
table type possible_keys key key_len ref rows Extra
t2 ALL fld1 NULL NULL NULL 1199 where used; Using temporary; Using filesort
t3 eq_ref PRIMARY PRIMARY 4 t2.fld1 1 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ALL fld1 NULL NULL NULL 1199 where used; Using temporary; Using filesort
1 FIRST t3 eq_ref PRIMARY PRIMARY 4 t2.fld1 1 where used; Using index
select period from t1;
period
9410
@ -1821,9 +1821,9 @@ select fld3,period from t2,t3 where t2.fld1 = 011401 and t2.fld1=t3.t2nr and t3.
fld3 period
breaking 1001
explain select fld3,period from t2,t3 where t2.fld1 = 011401 and t3.t2nr=t2.fld1 and 1001 = t3.period;
table type possible_keys key key_len ref rows Extra
t2 const fld1 fld1 4 const 1
t3 const PRIMARY,period PRIMARY 4 const 1
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 const fld1 fld1 4 const 1
1 FIRST t3 const PRIMARY,period PRIMARY 4 const 1
select fld3,period from t2,t1 where companynr*10 = 37*10;
fld3 period
breaking 9410
@ -2561,21 +2561,21 @@ fld1 fld1
select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
companynr companyname
explain select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null;
table type possible_keys key key_len ref rows Extra
t2 ALL NULL NULL NULL NULL 1199
t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 where used; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ALL NULL NULL NULL NULL 1199
1 FIRST t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 where used; Not exists
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null;
table type possible_keys key key_len ref rows Extra
t4 ALL NULL NULL NULL NULL 12
t2 ALL NULL NULL NULL NULL 1199 where used; Not exists
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t4 ALL NULL NULL NULL NULL 12
1 FIRST t2 ALL NULL NULL NULL NULL 1199 where used; Not exists
select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
companynr companynr
37 36
41 40
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
table type possible_keys key key_len ref rows Extra
t2 ALL NULL NULL NULL NULL 1199 Using temporary
t4 index NULL PRIMARY 1 NULL 12 where used; Using index
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ALL NULL NULL NULL NULL 1199 Using temporary
1 FIRST t4 index NULL PRIMARY 1 NULL 12 where used; Using index
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
fld1 companynr fld3 period
038008 37 reporters 1008
@ -3084,11 +3084,11 @@ select t2.fld1,sum(price) from t3,t2 where t2.fld1 = t3.t2nr and t3.companynr =
fld1 sum(price)
038008 234298
explain select fld3 from t2 where 1>2 or 2>3;
Comment
Impossible WHERE
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST Impossible WHERE
explain select fld3 from t2 where fld1=fld1;
table type possible_keys key key_len ref rows Extra
t2 ALL NULL NULL NULL NULL 1199
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 ALL NULL NULL NULL NULL 1199
select companynr,fld1 from t2 HAVING fld1=250501 or fld1=250502;
companynr fld1
34 250501
@ -3139,8 +3139,8 @@ select count(*) from t3 where companynr=512 and price2=76234234;
count(*)
4181
explain select min(fld1),max(fld1),count(*) from t2;
Comment
Select tables optimized away
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST Select tables optimized away
select min(fld1),max(fld1),count(*) from t2;
min(fld1) max(fld1) count(*)
0 1232609 1199