DB polling : query with subquery
Hi,
We are upgrading the 10g code to 11g, where one process has the DB polling with custom SQQL. This SQL has a subquery like,
Select Name, ID, CID from tabl1 where lastdate + (select num_value from table2 where column2 = "xxx") <= sysdate
We want the similar functionality in 11g. The upgraded code generated few artifiacts like toplink. We have bulilt that and deployed to server. But it is not polling the data eventhough the matching records are present in the tables.
Please let us know how to fix this issue.
Thanks,
Vinoth
Hi,
Not sure about your question.
But you say when you uss 01-apr-10 you get the expected results.
So why dont you try using trunc on botht sides
SELECT vfn.cat
FROM vps_fishery_ner vfn, valid_fishery vf
WHERE vfn.plan = vf.plan
AND vfn.cat = vf.cat
AND vf.permit_year = 2010
AND vf.moratorium_fishery = 'T'
AND vfn.vp_num = 211652
AND vfn.ap_year = 2010
AND vfn.plan = 'MUL'
AND trunc(vfn.date_issued) = (SELECT MAX(trunc(date_issued))
FROM vps_fishery_ner
WHERE vp_num = 211652
AND ap_year = 2010);Rememeber if you are couting on some Index to be used you might want to recheck.
IN answer to your question why it does not return with subquery included, because the TIME PART is not the same.
You yourself proved it by using the supplying only the date part.
Regards,
Bhushan
Similar Messages
-
Query with subquery should return value but doesn't
When I run this SQL, it returns no value:
SELECT vfn.cat
FROM vps_fishery_ner vfn, valid_fishery vf
WHERE vfn.plan = vf.plan
AND vfn.cat = vf.cat
AND vf.permit_year = 2010
AND vf.moratorium_fishery = 'T'
AND vfn.vp_num = 211652
AND vfn.ap_year = 2010
AND vfn.plan = 'MUL'
AND vfn.date_issued = (SELECT MAX(date_issued)
FROM vps_fishery_ner
WHERE vp_num = 211652
AND ap_year = 2010);
In order to test, I take out the subquery and run it separately:
SELECT MAX(date_issued)
FROM vps_fishery_ner
WHERE vp_num = 211652
AND ap_year = 2010;
Returns 02-APR-10
Then I paste this date into the original query (using the TRUNC function, of course, since I hardcode only the DDMMYY part of the date):
SELECT vfn.cat
FROM vps_fishery_ner vfn, valid_fishery vf
WHERE vfn.plan = vf.plan
AND vfn.cat = vf.cat
AND vf.permit_year = 2010
AND vf.moratorium_fishery = 'T'
AND vfn.vp_num = 211652
AND vfn.ap_year = 2010
AND vfn.plan = 'MUL'
AND TRUNC(date_issued) = TO_DATE('02-APR-10');
And this returns the required value, 'A'.
So why doesn't the full query with subquery work, if the value that is returned by the subquery is valid and works when you just paste it in?
Thanks.Hi,
Not sure about your question.
But you say when you uss 01-apr-10 you get the expected results.
So why dont you try using trunc on botht sides
SELECT vfn.cat
FROM vps_fishery_ner vfn, valid_fishery vf
WHERE vfn.plan = vf.plan
AND vfn.cat = vf.cat
AND vf.permit_year = 2010
AND vf.moratorium_fishery = 'T'
AND vfn.vp_num = 211652
AND vfn.ap_year = 2010
AND vfn.plan = 'MUL'
AND trunc(vfn.date_issued) = (SELECT MAX(trunc(date_issued))
FROM vps_fishery_ner
WHERE vp_num = 211652
AND ap_year = 2010);Rememeber if you are couting on some Index to be used you might want to recheck.
IN answer to your question why it does not return with subquery included, because the TIME PART is not the same.
You yourself proved it by using the supplying only the date part.
Regards,
Bhushan -
Simple Query with subquery returns the 'wrong' result
DB version: 11.2
We created about 27 schemas in the last 4 days. The below query confirms that.
SQL > select username, created from dba_users where created > sysdate-4;
USERNAME CREATED
MANHSMPTOM_DEV_01 12 Jul 2012 11:55:16
PRSM01_OAT_IAU 13 Jul 2012 01:51:03
F_SW 11 Jul 2012 17:52:42
FUN_CDD_HK_SIT 09 Jul 2012 15:33:57
CEMSCOMPTOM_UAT_01 12 Jul 2012 11:43:45
STORM02_OAT_IAU 13 Jul 2012 02:06:29
27 rows selected. -------------> Truncated outputFrom DBA_TS_QUOTAS.max_bytes column , we can determine the space quota allocated for a user/schema
SQL > desc dba_ts_quotas
Name Null? Type
TABLESPACE_NAME NOT NULL VARCHAR2(30)
USERNAME NOT NULL VARCHAR2(30)
BYTES NUMBER
MAX_BYTES NUMBER
BLOCKS NUMBER
MAX_BLOCKS NUMBER
DROPPED VARCHAR2(3)So, I wanted to see the allocated space for the users created in the last 4 days. The below query should return only 27 records because the subquery returns only 27 records. Instead it returned 66 records !
select username, tablespace_name, max_bytes/1024/1024 quotaInMB
from dba_ts_quotas
where username in (select username from dba_users where created > sysdate-4);Any idea why ? I know it is not a bug with oracle. Its just I haven't been eating fish lately.Hi,
J.Kiechle wrote:
So, I wanted to see the allocated space for the users created in the last 4 days.DBA_TS_QUOTAS doesn't give the allocated space but rather the maximum allowed for a given user.
J.Kiechle wrote:
The below query should return only 27 records because the subquery returns only 27 records. Instead it returned 66 records !What if your user John has Quotas on 3 tablespace TBS1, TBS2 and TBS3 ?
You cannot expect the outer query to only retrieve at most 27 rows just because the inner query returns 27 rows.
For allocated space by tablespace for recently created users, you'd better query dba_segments. something like :select owner, tablespace_name, trunc(sum(bytes)/1024/1024) alloc_mb
from dba_segments
where owner in (select username from dba_users where created > sysdate - 4)
group by owner, tablespace_name
order by owner, tablespace_name; -
Is it possible to use parameter in a user query with subquery ?
Hi ,
i need to use parameter ( [%0] ) in user query using a subquery , but i have errors message when i execute the query
example :
SELECT T0.[DocNum] as docnum, T0.[DocTotal] as cde , 0 as fact FROM ORDR T0 WHERE T0.[CardCode] =N'[%0]'
union all
SELECT T0.[DocNum], 0 as cde,T0.[DocTotal] as fact FROM OINV T0 WHERE T0.[CardCode] =N'[%0]'
works fine
but ( exactly the same query in the subquery )
Select t2.Docnum ,t2.cde , t2.fact from
SELECT T0.[DocNum] as docnum, T0.[DocTotal] as cde , 0 as fact FROM ORDR T0 WHERE T0.[CardCode] =N'[%0]'
union all
SELECT T0.[DocNum], 0 as cde,T0.[DocTotal] as fact FROM OINV T0 WHERE T0.[CardCode] =N'[%0]'
) t2
return an error message
the same query without parameter works fine too :
Select Docnum ,cde , fact from
SELECT T0.[DocNum] as docnum, T0.[DocTotal] as cde , 0 as fact FROM ORDR T0 WHERE T0.[CardCode] ='C1'
union all
SELECT T0.[DocNum], 0 as cde,T0.[DocTotal] as fact FROM OINV T0 WHERE T0.[CardCode] ='C1'
) t2
Is it possible to use parameter in a subquery ?
thanksTry this one:
declare @cc nvarchar(20)
set @cc=/*Select c.cardcode from OCRD c where c.cardcode=*/'[%0]'
Select Docnum ,cde , fact from
SELECT T0.[DocNum] as docnum, T0.[DocTotal] as cde , 0 as fact FROM ORDR T0 WHERE T0.[CardCode] =@cc
union all
SELECT T0.[DocNum], 0 as cde,T0.[DocTotal] as fact FROM OINV T0 WHERE T0.[CardCode] =@cc
) t2 -
Hello,
Assuming the DreamHome scenario: Viewing is a nested table of Property; Viewing references Client. Does anyone have any idea how to do the following query:
Identify all clients who have viewed ALL properties with three rooms in a given city (not just any properties, ALL of them)This maybe better off in the PL/SQL forum, but in general if you want answers you need to provide the following:
1. Oracle version (SELECT * FROM V$VERSION)
2. Sample data in the form of CREATE / INSERT statements
3. Expected output
4. Explanation or logic on how to achieve #3
5. \ tags for #2 and #3
Thanks! -
Query with subquery containing group clause doesn't return any rows - WHY ?
Hi,
My query doesn't return any values :
select g1.NTRX from gtrx g1
where exists
(SELECT b.cfunctrx, b.cpro1trx, b.nmsgitrx, b.nmrc, b.ncrd, b.namtstrx,
b.dltimtrx, b.nrtrftrx,count(*)
FROM gtrxacq a, gtrx b
WHERE a.ntrx = b.ntrx AND a.acq_bus_date = (SELECT curr_bus_date -1
FROM gmbr
WHERE nmbr = 0)
and g1.NTRX=b.NTRX
GROUP BY b.cfunctrx,
b.cpro1trx,
b.nmsgitrx,
b.nmrc,
b.ncrd,
b.namtstrx,
b.dltimtrx,
b.nrtrftrx
HAVING COUNT (*) > 1);
but such query returns some number of rows :
SELECT b.cfunctrx, b.cpro1trx, b.nmsgitrx, b.nmrc, b.ncrd, b.namtstrx,
b.dltimtrx, b.nrtrftrx,count(*)
FROM gtrxacq a, gtrx b
WHERE a.ntrx = b.ntrx AND a.acq_bus_date = (SELECT curr_bus_date -1
FROM gmbr
WHERE nmbr = 0)
/*and g1.NTRX=b.NTRX*/
GROUP BY b.cfunctrx,
b.cpro1trx,
b.nmsgitrx,
b.nmrc,
b.ncrd,
b.namtstrx,
b.dltimtrx,
b.nrtrftrx
HAVING COUNT (*) > 1
AND when i put results from query above into query :
select g1.NTRX from gtrx g1
where
g1.CFUNCTRX= 200 and g1.CPRO1TRX= 000 and g1.NMSGITRX= 1240 and
g1.NMRC= '000000000000675' and g1.NCRD= 405671**********
and g1.NAMTSTRX=14.26 and g1.DLTIMTRX=to_date('07/08/2008 15:07:02','MM/DD/YYYY HH24:MI:SS')
and g1.NRTRFTRX= '000414598393';
it returns values.
what is wrong ?
Best Regards Arkadiusz Masnybut such query returns some number of rows :
/*and g1.NTRX=b.NTRX*/Add b.NTRX into group by and recheck. -
WITH Subquery Factoring OR "Scalar SubqueriesRun Another Query per row
Hi Experts
Please suggest
which one query is better
Involved table p is of size 2GB and c1/c2 of size 800M.
And we have to run a report on p which will do FTS (no where clause on p)
So FTS on 2 GB table and then running Another Query per row .. so results job very slow
1) Select p.id,
(select sum(q1) from c1 where c1.id = p.id) c1_sum1,
(select sum(q2) from c2 where c2.id = p.id) c2_sum2
from p
2)
WITH Subquery Factoring
with c1_vw as
(select id, sum(q1) c1_sum1
from c1
group by id),
c2_vw as
(select id, sum(q2) c2_sum2
from c2
group by id),
c1_c2 as
(select c1.id, c1.c1_sum1, c2.c2_sum2
from c1_vw c1, c2_vw c2
where c1.id = c2.id )
select p.id, c1_sum1, c2_sum2
from p, c1_c2
where p.id = c1_c2.id
/ 10.2..0.4
AIX 5.3
Thanks In Advance
ivwivw wrote:
which one query is betterThe better query IMHO is the one that returns the the correct results in the shortest amount of time using the least system resources (the last two items usually happen at the same time). Maintainability is an issue too. Which one do you like best?
Its hard to say which query will run best without running both, getting execution plans, and run-time statistics. At a pure guess I would think all things being equal they would have similar performance but do not really know. -
SQL query with lots of conditions issue..
Working on A large query that hits a large DB of parts.
The table I am given these parts are broken up into 4 fields.
Section,Groupid,Subgroupid,Component
When I hit this table, i am given a list of all the possible combo's of the 4 fields that can be used for that lookup at that time.
The problem is its SLOW when this list is pretty big.. a lot of times, over 200 rows of combos... so end up with something like below,
but stripped down for explaining...
So a generic version the query..
Select * from PartTable where
( (section='blah1') and (groupid='blah2') and (subgroupid='blah3') and (component='blah4') ) or
( (section='blah5') and (groupid='blah6') and (subgroupid='blah7') and (component='blah8') ) or
( (section='blah9') and (groupid='blah10') and (subgroupid='blah11') and (component='blah12') ) or
( (section='blah250') and (groupid='blah251') and (subgroupid='blah252') and (component='blah253') )I have changed it to a deal where I have a subquery and do a case statement to query a subquery, but the problem I run into that
is, is that 10g only allows so many. I can get around this by when i generate the query, to just make multiple case statements and then
modify my where statement.. but seems sloppy.. but "Works" .. using the OR statement deal, it can take near 30 seconds... with the
sloppy looking multiple case statement field deal, it takes 1.6 seconds..870023 wrote:
Try creating Index on these columns. Will help in CPU cost.That is one of the most useless pieces of advice I have ever seen.
CPU cost does not necessarily reflect performance. Creating too many indexes can also slow down performance. The first way of tackling a performance issue is to find out what the cause is, before trying to figure out the best way to fix it.
{message:id=9360003} -
Hello.
I have a query with LEFT OUTER JOIN that I think returns invalid results. Here are the problem details:
CREATE TABLE DOGERR(
IdDog INTEGER,
SfPdg CHAR(1),
IdVpl INTEGER,
SfVpGot INTEGER,
SfZrr CHAR(1)
INSERT INTO DOGERR(IdDog, SfPdg, IdVpl, SfVpGot, SfZrr) VALUES (1, 'S', 1, 1, '7');
INSERT INTO DOGERR(IdDog, SfPdg, IdVpl, SfVpGot, SfZrr) VALUES (2, 'S', 1, 1, '7');
INSERT INTO DOGERR(IdDog, SfPdg, IdVpl, SfVpGot, SfZrr) VALUES (3, '$', 1, 2, 'C');
COMMIT;
CREATE UNIQUE INDEX DOGERR_PK ON DOGERR(IdDog);
And now the query:
SELECT D.IdDog, D.SfPdg, D.IdVpl, D.SfVpGot, D.SfZrr, T.IdVpl AS IdVplJoin, T.SfVpGot AS SfVpGotJoin, T.SfZrr AS SfZrrJoin
FROM DOGERR D
LEFT OUTER JOIN (SELECT * FROM DOGERR WHERE SfPdg = 'S' OR SfPdg = 'S') T ON
T.IdVpl = D.IdVpl AND T.SfVpGot = D.SfVpGot AND T.SfZrr = D.SfZrr
WHERE
D.IdDog = 3
AND D.SfVpGot = 2
AND D.SfZrr = 'C';
This query should (by my understanding) return only one row in wich the joined subquery columns should be NULL. And indeed query returns only one row on Oracle Database 10g Release 10.2.0.1.0 - Production and on Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production:
IDDOG = 3, SFPDG = "$", IDVPL = 1, SFVPGOT = 2, SFZRR = "C", IDVPLJOIN = NULL, SFVPGOTJOIN = NULL, SFZRRJOIN = NULL
But on Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - 64bit Production it returns TWO rows:
IDDOG = 3, SFPDG = "$", IDVPL = 1, SFVPGOT = 2, SFZRR = "C", IDVPLJOIN = 1, SFVPGOTJOIN = 1, SFZRRJOIN = "7"
IDDOG = 3, SFPDG = "$", IDVPL = 1, SFVPGOT = 2, SFZRR = "C", IDVPLJOIN = 1, SFVPGOTJOIN = 1, SFZRRJOIN = "7"
And now the interesting part: any of the following modified versions of query works even on Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - 64bit Production, although modifications should not modify the result set:
-- Removed unnecessary WHERE conditions
SELECT D.IdDog, D.SfPdg, D.IdVpl, D.SfVpGot, D.SfZrr, T.IdVpl AS IdVplJoin, T.SfVpGot AS SfVpGotJoin, T.SfZrr AS SfZrrJoin
FROM DOGERR D
LEFT OUTER JOIN (SELECT * FROM DOGERR WHERE SfPdg = 'S' OR SfPdg = 'S') T ON
T.IdVpl = D.IdVpl AND T.SfVpGot = D.SfVpGot AND T.SfZrr = D.SfZrr
WHERE
D.IdDog = 3;
-- Removed unnecessary OR condition in subquery
SELECT D.IdDog, D.SfPdg, D.IdVpl, D.SfVpGot, D.SfZrr, T.IdVpl AS IdVplJoin, T.SfVpGot AS SfVpGotJoin, T.SfZrr AS SfZrrJoin
FROM DOGERR D
LEFT OUTER JOIN (SELECT * FROM DOGERR WHERE SfPdg = 'S') T ON
T.IdVpl = D.IdVpl AND T.SfVpGot = D.SfVpGot AND T.SfZrr = D.SfZrr
WHERE
D.IdDog = 3
AND D.SfVpGot = 2
AND D.SfZrr = 'C';
-- Removed columns from joined subquery from SELECT part
SELECT D.IdDog, D.SfPdg, D.IdVpl, D.SfVpGot, D.SfZrr, T.IdVpl AS IdVplJoin, T.SfVpGot AS SfVpGotJoin
FROM DOGERR D
LEFT OUTER JOIN (SELECT * FROM DOGERR WHERE SfPdg = 'S' OR SfPdg = 'S') T ON
T.IdVpl = D.IdVpl AND T.SfVpGot = D.SfVpGot AND T.SfZrr = D.SfZrr
WHERE
D.IdDog = 3
AND D.SfVpGot = 2
AND D.SfZrr = 'C';
NOTE: the query itself is a little stupid but this is just to demonstrate the problem. We have faced this problem at a customer with our real-world query.
So, my question is: why different results ?
Thanks.
Davidhi,
welcome to the forum,
don't have a solution, but I thought I'd let you know that the first SQL statement only returns 1 row on 10gR2
SQL> SELECT D.IdDog, D.SfPdg, D.IdVpl, D.SfVpGot, D.SfZrr, T.IdVpl AS IdVplJoin, T.SfVpGot AS SfVpGo
tJoin, T.SfZrr AS SfZrrJoin
2 FROM DOGERR D
3 LEFT OUTER JOIN (SELECT * FROM DOGERR WHERE SfPdg = 'S' OR SfPdg = 'S') T ON
4 T.IdVpl = D.IdVpl AND T.SfVpGot = D.SfVpGot AND T.SfZrr = D.SfZrr
5 WHERE
6 D.IdDog = 3
7 AND D.SfVpGot = 2
8 AND D.SfZrr = 'C';
IDDOG S IDVPL SFVPGOT S IDVPLJOIN SFVPGOTJOIN S
3 $ 1 2 C
SQL> select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for Solaris: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production -
Not able to migrate a query with not exist clause
Hi all,
I'm using Toplink 10.1.3 and I am trying to rewrite the following query with Expression Framework:
select distinct r.e_ogg_oper_k_oggetto
FROM regola_accettazione_oper_banc r, oggetto_operazione_bancaria o
where not exists (
select 1
FROM limitaz_ogg_tipo_oper_banc l
where nvl(l.d_fine_validita,trunc(sysdate)+1)>trunc(sysdate)
and l.d_inizio_validita <= trunc(sysdate)
and l.e_tpodv_k_tipo_operazione=:appoggio.tipo_operaz
and l.e_ogg_oper_k_oggetto=r.e_ogg_oper_k_oggetto
and l.e_uni_oper_k_unita_oper_util= :appoggio.e_uni_oper_k_unita_oper_esegui )
and r.e_oper_ban_k_operaz_bancaria=:appoggio.form
and r.e_ogg_oper_k_oggetto=o.k_oggetto
and o.e_ogg_oper_k_oggetto is null
and o.k_oggetto != nvl(:appoggio.oggetto_autom,,'0')
and o.k_oggetto like substr(:appoggio.oggetto,1,2)||'%'
and r.d_inizio_validita <= :appoggio.d_contab
and to_date(nvl(to_char(r.d_fine_validita,DD/MM/YYYY'),31/12/3999'),'DD/MM/YYYY')> :appoggio.d_contab
and o.f_natura_oggetto in ('G','P') and r.f_oggetto_automatizzato!='S'
I'm not able to "attach" the not exist clause to the rest of query.
How can I do it?
Thank you very much.Not exists can be used in an expression through using a ReportQuery sub-query.
i.e.
ExpressionBuilder outerBuilder = new ExpressionBuilder();
ReadAllQuery outerQuery = new ReadAllQuery(Employee.class, outerBuilder);
ExpressionBuilder subBuilder = new ExpressionBuilder();
ReportQuery subQuery = new ReportQuery(Address.class, subBuilder);
subQuery.addAttribute("id");
subQuery.setSelectionCriteria(
subBuilder.get("city").equal(outerBuilder.get("address").get("city")
.and(subBuilder.notEqual(outerBuilder.get("address")))));
outerQuery.setSelectionCriteria(
outerBuilder.notExists(subQuery));
List results = (List) session.executeQuery(outerQuery);
Refer to the documentation section on sub-queries for more information.
I would suggest simlpifying the where clause until you get the sub-query working to start.
You can also always use a custom SQL query in TopLink. -
Hi,
I have one table test_tab with column names empno,empname.The test_tab values is as follows,
empno empname
01 siva
02 ram
03 kamal
04 sathish
i will give the empname values like 'siva','roshan',but in the table roshan name is not there in my table.I need the below mentioned o/p
example qry: select empno,empname from test_tab where empname in('siva','roshan');
my o/p should be like this,
empname empno
siva 01
roshan ''
But the empname 'roshan' is not there in table.I need the empname as 'roshan' and empno is null value in a single select query or subquery or any sql statements.
Please help me the resolve this issue.
Thanks
Sivaramankn_sivaraman wrote:
Hi,
Yes,we will see performance issue later.Now we want put where clause in this query like empno >'03'.Suppose we will pass values like 'kamal,roshan,sathish'
example qry: select empno,empname from test_tab where empname in('kamal','roshan','sathish') and empno>03;
my o/p should be like this,
empname empno
sathish 04
roshan ''
For the current query we will get the all three values.Please help this issue.
Thanks
SivaThat logic doesn't make sense.
You're original requirement was to get all those names you passed in and just show a blank empno if they weren't in the table.
Now you're adding a condition that restricts what is seen in the table, so of course you will still get all 3 values you pass, just that "kamal" is not seen as being in the table so becomes part of the original requirement to show those passed in without their empno.
I can only guess you're wanting to just restrict the overall output, in which case you need to put the restriction outside the join but still cater for null empno's...
SQL> ed
Wrote file afiedt.buf
1 with t as (-- comma seperated input values
2 select 'kamal,roshan,sathish' as names from dual
3 )
4 ,s as (-- split the names into rows
5 select regexp_substr(names, '[^,]+', 1, level) as nm
6 from t
7 connect by regexp_substr(names, '[^,]+', 1, level) is not null
8 )
9 -- now outer join the names to the data
10 select s.nm as empname
11 ,test_tab.empno
12 from s left outer join test_tab on (s.nm = test_tab.empname)
13* where to_number(test_tab.empno) > 3 or test_tab.empno is null
SQL> /
EMPNAME EM
sathish 04
roshan -
Case statement with Subquery
select case when condition then
i want to execute qr1
else qr2
How to implement this ?Hi,
Welcoem to the forum!
972471 wrote:
Case statement with SubqueryHow does a sub-query, or a query, figure in this question?
Be more specific. Post a complete script that you tried, and what output you expected from it. If you got an error, post the complete error message, including line numbers.
See the forum FAQ {message:id=9360002}
select case when condition then
i want to execute qr1
else qr2
How to implement this ?Here's one way:
BEGIN
CASE
WHEN 1 = 1
THEN
dbms_output.put_line ('Condition was TRUE');
ELSE
dbms_output.put_line ('Condition was FALSE or UNKNOWN');
END CASE;
END;
/If the condition involves a query, then you may have to select the results into a variable first, and then use the variable in the CASE statement. -
Hi ,
I have created a sub query with order by on a column.( i have cutomized the IKM control append to put order by).I can see the order by condition.If i use this subquery(yellow interface) in main query(is also yellow interface) i can't see the order by condition
Subquery(Q-yellow interface):
select
PID,
START_TIME,
ACTION_TYPE_CODE
FROM
select DISTINCT
SERVICE_TRACKING_S.PID PID,
TO_TIMESTAMP(TO_CHAR(SERVICE_TRACKING_S.ACTION_TIME,'DD-MON-YY HH24:MI:SS'),'DD-MON-YY HH24:MI:SS') START_TIME,
SERVICE_TRACKING_S.ACTION_TYPE_CODE ACTION_TYPE_CODE
from KSTGDB.SERVICE_TRACKING_S SERVICE_TRACKING_S
where (1=1)
ORDER BY-----------------------------------------------
PID
,START_TIME ASC
ODI_GET_FROM
Main query(Q1--yellow interface):
select
PID,
START_TIME,
ACTION_TYPE_CODE,
RN,
RN_MAX
FROM (
select
Q.PID PID,
Q.START_TIME START_TIME,
CASE WHEN Q.START_TIME-LAG(Q.START_TIME,1,Q.START_TIME) OVER (PARTITION BY Q. PID ORDER BY Q.START_TIME)> numtodsinterval(75,'minute')
or Q.PID!=LAG(Q.PID,1,0) OVER (PARTITION BY Q.PID ORDER BY Q.START_TIME) THEN 1 ELSE Q.ACTION_TYPE_CODE END ACTION_TYPE_CODE,
ROW_NUMBER() OVER(PARTITION BY Q.PID ORDER BY Q.START_TIME) RN,
count(*) over (PARTITION BY Q.PID ORDER BY Q.START_TIME ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING )
RN_MAX
from (
select DISTINCT
SERVICE_TRACKING_S.PID PID, TO_TIMESTAMP(TO_CHAR(SERVICE_TRACKING_S.ACTION_TIME,'DD-MON-YY HH24:MI:SS'),'DD-MON-YY HH24:MI:SS') START_TIME, SERVICE_TRACKING_S.ACTION_TYPE_CODE ACTION_TYPE_CODE
from KSTGDB.SERVICE_TRACKING_S SERVICE_TRACKING_S
where (1=1)
----------------- i don't see order by here--------------------------------
) Q
where (1=1)
) ODI_GET_FROM
thanks in advance
KHi,
Add a new KM step with the SQL you want to use for the sub query and select the +"Use Current Command for Derived-Table sub-select statement"+ checkbox. This new step can be the last one of your IKM.
Basically, you can copy the select statement of the "Insert new rows" step.
Regards,
JeromeFr -
Slow connect by prior ... start with subquery in 9i
Has anyone come across a performance problem (compared to 8i) when using hierarchical queries where the START WITH list is generated by a subquery? The culprit seems to be an extra visit to the subquery block as part of the CONNECT BY WITH FILTERING operation.
For example, take a simple tree structure:
CREATE TABLE tree
id NUMBER,
parentid NUMBER
CONSTRAINT tree_pk PRIMARY KEY (id)
...and a subquery - here just a table called sample with a subset of the ids from the tree table:
CREATE TABLE sample
id NUMBER,
CONSTRAINT sample_pk PRIMARY KEY (id)
...with which to drive the start points of the treewalk:
SELECT parentid, id, label
FROM tree
CONNECT BY PRIOR parentid = id
START WITH id IN
SELECT id FROM SAMPLE
With the tables populated and analyzed, I get this from 8i:
Execution Plan
.0......SELECT STATEMENT Optimizer=CHOOSE (Cost=2 Card=1 Bytes=19)
.1....0...CONNECT BY
.2....1.....NESTED LOOPS (Cost=1 Card=1280 Bytes=10240)
.3....2.......INDEX (FAST FULL SCAN) OF 'ID_PK' (UNIQUE) (Cost=1 Card=1280 Bytes=5120)
.4....2.......INDEX (UNIQUE SCAN) OF 'TREE_PK' (UNIQUE)
.5....1.....TABLE ACCESS (BY USER ROWID) OF 'TREE'
.6....1.....TABLE ACCESS (BY INDEX ROWID) OF 'TREE' (Cost=2 Card=1 Bytes=19)
.7....6.......INDEX (UNIQUE SCAN) OF 'TREE_PK' (UNIQUE) (Cost=1 Card=1)
Statistics
.....0..recursive calls
.....4..db block gets
.15687..consistent gets
....59..physical reads
.....0..redo size
223313..bytes sent via SQL*Net to client
.38276..bytes received via SQL*Net from client
...343..SQL*Net roundtrips to/from client
.....3..sorts (memory)
.....0..sorts (disk)
..5120..rows processed
and this is 9i:
Execution Plan
.0......SELECT STATEMENT Optimizer=CHOOSE (Cost=2 Card=1 Bytes=19)
.1....0...CONNECT BY (WITH FILTERING)
.2....1.....NESTED LOOPS
.3....2.......NESTED LOOPS (Cost=2 Card=1280 Bytes=10240)
.4....3.........INDEX (FAST FULL SCAN) OF 'ID_PK' (UNIQUE) (Cost=2 Card=1280 Bytes=5120)
.5....3.........INDEX (UNIQUE SCAN) OF 'TREE_PK' (UNIQUE)
.6....2.......TABLE ACCESS (BY USER ROWID) OF 'TREE'
.7....1.....NESTED LOOPS
.8....7.......BUFFER (SORT)
.9....8.........CONNECT BY PUMP
10....7.......TABLE ACCESS (BY INDEX ROWID) OF 'TREE' (Cost=2 Card=1 Bytes=19)
11...10.........INDEX (UNIQUE SCAN) OF 'TREE_PK' (UNIQUE) (Cost=1 Card=20480)
12....1.....INDEX (UNIQUE SCAN) OF 'SAMPLE_PK' (UNIQUE) (Cost=1 Card=1 Bytes=4)
Statistics
.....1..recursive calls
.....1..db block gets
.20525..consistent gets
....72..physical reads
...120..redo size
224681..bytes sent via SQL*Net to client
.38281..bytes received via SQL*Net from client
...343..SQL*Net roundtrips to/from client
.....9..sorts (memory)
.....0..sorts (disk)
..5120..rows processed
..so, about another 5000 logical reads, corresponding to the extra access of the sample table at the bottom of the query plan. So instead of just visiting the START WITH subquery once, to kick off the treewalk, I seem to be revisiting it for every row returned. Not too bad if that happens to be a unique index scan as here but that's not always the case.
I know I've got new options for re-writing this as a join under 9i, I'm just curious about those extra lookups and why they're necessary.
Cheers - AndrewThere is undocumented parameter in Oracle 9i "_old_connect_by_enabled"
which controls the behavoiur of hierarchy queries in 9i and above:
You can try to return to 8i behaviour using it:
SQL> SELECT parentid, id
2 FROM tree
3 CONNECT BY PRIOR parentid = id
4 START WITH id IN
5 (
6 SELECT id FROM SAMPLE
7 )
8 /
Execution Plan
0 SELECT STATEMENT Optimizer=ALL_ROWS (Cost=1 Card=1 Bytes=26)
1 0 CONNECT BY (WITH FILTERING)
2 1 TABLE ACCESS (BY INDEX ROWID) OF 'TREE' (TABLE)
3 2 NESTED LOOPS (Cost=2 Card=1 Bytes=26)
4 3 TABLE ACCESS (FULL) OF 'SAMPLE' (TABLE) (Cost=2 Card
=1 Bytes=13)
5 3 INDEX (UNIQUE SCAN) OF 'TREE_PK' (INDEX (UNIQUE)) (C
ost=0 Card=1 Bytes=13)
6 1 NESTED LOOPS
7 6 BUFFER (SORT)
8 7 CONNECT BY PUMP
9 6 TABLE ACCESS (BY INDEX ROWID) OF 'TREE' (TABLE) (Cost=
1 Card=1 Bytes=26)
10 9 INDEX (UNIQUE SCAN) OF 'TREE_PK' (INDEX (UNIQUE)) (C
ost=1 Card=1)
11 1 TABLE ACCESS (FULL) OF 'TREE' (TABLE) (Cost=1 Card=1 Byt
es=26)
12 1 INDEX (UNIQUE SCAN) OF 'SAMPLE_PK' (INDEX (UNIQUE)) (Cos
t=1 Card=1 Bytes=13)
SQL> alter session set "_old_connect_by_enabled" = TRUE;
Session altered.
SQL> SELECT parentid, id
2 FROM tree
3 CONNECT BY PRIOR parentid = id
4 START WITH id IN
5 (
6 SELECT id FROM SAMPLE
7 )
8 /
Execution Plan
0 SELECT STATEMENT Optimizer=ALL_ROWS (Cost=1 Card=1 Bytes=26)
1 0 CONNECT BY
2 1 NESTED LOOPS (Cost=2 Card=1 Bytes=26)
3 2 TABLE ACCESS (FULL) OF 'SAMPLE' (TABLE) (Cost=2 Card=1
Bytes=13)
4 2 INDEX (UNIQUE SCAN) OF 'TREE_PK' (INDEX (UNIQUE)) (Cos
t=0 Card=1 Bytes=13)
5 1 TABLE ACCESS (BY USER ROWID) OF 'TREE' (TABLE)
6 1 TABLE ACCESS (BY INDEX ROWID) OF 'TREE' (TABLE) (Cost=1
Card=1 Bytes=26)
7 6 INDEX (UNIQUE SCAN) OF 'TREE_PK' (INDEX (UNIQUE)) (Cos
t=1 Card=1)
Rgds. -
Slow connect by ... start with subquery in 9i
Has anyone come across a performance problem (compared to 8i) when using hierarchical queries where the START WITH list is generated by a subquery? The culprit seems to be an extra visit to the subquery block as part of the CONNECT BY WITH FILTERING operation.
For example, take a simple tree structure:
CREATE TABLE tree
id NUMBER,
parentid NUMBER
CONSTRAINT tree_pk PRIMARY KEY (id)
...and a subquery - here just a table called sample with a subset of the ids from the tree table:
CREATE TABLE sample
id NUMBER,
CONSTRAINT sample_pk PRIMARY KEY (id)
...with which to drive the start points of the treewalk:
SELECT parentid, id, label
FROM tree
CONNECT BY PRIOR parentid = id
START WITH id IN
SELECT id FROM SAMPLE
With the tables populated and analyzed, I get this from 8i:
Execution Plan
.0......SELECT STATEMENT Optimizer=CHOOSE (Cost=2 Card=1 Bytes=19)
.1....0...CONNECT BY
.2....1.....NESTED LOOPS (Cost=1 Card=1280 Bytes=10240)
.3....2.......INDEX (FAST FULL SCAN) OF 'ID_PK' (UNIQUE) (Cost=1 Card=1280 Bytes=5120)
.4....2.......INDEX (UNIQUE SCAN) OF 'TREE_PK' (UNIQUE)
.5....1.....TABLE ACCESS (BY USER ROWID) OF 'TREE'
.6....1.....TABLE ACCESS (BY INDEX ROWID) OF 'TREE' (Cost=2 Card=1 Bytes=19)
.7....6.......INDEX (UNIQUE SCAN) OF 'TREE_PK' (UNIQUE) (Cost=1 Card=1)
Statistics
.....0..recursive calls
.....4..db block gets
.15687..consistent gets
....59..physical reads
.....0..redo size
223313..bytes sent via SQL*Net to client
.38276..bytes received via SQL*Net from client
...343..SQL*Net roundtrips to/from client
.....3..sorts (memory)
.....0..sorts (disk)
..5120..rows processed
and this is 9i:
Execution Plan
.0......SELECT STATEMENT Optimizer=CHOOSE (Cost=2 Card=1 Bytes=19)
.1....0...CONNECT BY (WITH FILTERING)
.2....1.....NESTED LOOPS
.3....2.......NESTED LOOPS (Cost=2 Card=1280 Bytes=10240)
.4....3.........INDEX (FAST FULL SCAN) OF 'ID_PK' (UNIQUE) (Cost=2 Card=1280 Bytes=5120)
.5....3.........INDEX (UNIQUE SCAN) OF 'TREE_PK' (UNIQUE)
.6....2.......TABLE ACCESS (BY USER ROWID) OF 'TREE'
.7....1.....NESTED LOOPS
.8....7.......BUFFER (SORT)
.9....8.........CONNECT BY PUMP
10....7.......TABLE ACCESS (BY INDEX ROWID) OF 'TREE' (Cost=2 Card=1 Bytes=19)
11...10.........INDEX (UNIQUE SCAN) OF 'TREE_PK' (UNIQUE) (Cost=1 Card=20480)
12....1.....INDEX (UNIQUE SCAN) OF 'SAMPLE_PK' (UNIQUE) (Cost=1 Card=1 Bytes=4)
Statistics
.....1..recursive calls
.....1..db block gets
.20525..consistent gets
....72..physical reads
...120..redo size
224681..bytes sent via SQL*Net to client
.38281..bytes received via SQL*Net from client
...343..SQL*Net roundtrips to/from client
.....9..sorts (memory)
.....0..sorts (disk)
..5120..rows processed
..so, about another 5000 logical reads, corresponding to the extra access of the sample table at the bottom of the query plan. So instead of just visiting the START WITH subquery once, to kick off the treewalk, I seem to be revisiting it for every row returned. Not too bad if that happens to be a unique index scan as here but that's not always the case.
I know I've got new options for re-writing this as a join under 9i, I'm just curious about those extra lookups and why they're necessary.
Cheers - AndrewHi Andrew,
Just noticed you message. I have exact same performance problem. It's just killing ant other processes and runs forever.
Could you please share you experience how to deal with "CONNECT BY" in 9i and also could you please tell about this option to re-write CONNECT BY as a join?
Thank you very much,
Victor
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