SQL query execution in DB02 hangs if record set is more than 50000

Hi,
We are facing issue in a report performance. The return is using native SQL query.
There are custom views created ar database level for pricing/maetrial and stock. The native sql query is written on these views. The report takes around 15 mins to run in background .
We are trying to analyse the native SQL query through DB02. I tried fetching records for one particular
custom view to make out if its indexing issue or something else.When i using TOP 35000 records with select query runs fine with this dataset or less than this . If i increase it to 40000 system doesn;t show anything in SQL ouptut. And above one lakh records system gives timeout.
The count in this view gives some 10 lakh records which I don't feel is v.v.huge that query that too native sql takes so much time.
Any help on this will be highly appreciated.
Regards
Madhu

what do you expect from that poor information.
do you change data or onyl select.
If you use SAP and ABAP, then you should also use Open SQL.
Otherwise it is possible to run the SQL Trace with Native SQL, it is anyway only Native SQL, what the trace sees.
Use package size and it will probably work fine.
Siegfried

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Hello All
I have 28000 records with 8 column in an sheet. When I convert the sheet into ADODB database and copy to new
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But when I change the query to manipulate one column in current table based on another table in the same excel
and try to copy the results in another excel, it is taking more than one hour.. why it is taking this much time when both the query results returns the same number of rows and column. I almost spend one week and still not able to resolve this issue.
Even I tried copyfromrecordset, getrows(), getstring(), Looping each recordset fields options all of them taking
same amount of time. Why there is huge difference in execution time.
Important note: Without into statement even below query is executing in few seconds.
select ( ''''''manipulating first column based on other table data''''''''''''''
iif(
[Second - Table$].[Policy Agent] = (select max([ACAT$].[new_Agent_number]) from [ACAT$] where [ACAT$].[new_Agent_number] = [Second - Table$].[Policy Agent] and [ACAT$].[ACAT_EffectiveDate] = ( select MAX([ACAT$].[ACAT_EffectiveDate] ) from [ACAT$] where [ACAT$].[new_Agent_number] = [Second - Table$].[Policy Agent]and [ACAT$].[ACAT_EffectiveDate] > '2014-10-01') ) , (select max([ACAT$].[Old_Agent_number]) from [ACAT$] where [ACAT$].[new_Agent_number] = [Second - Table$].[Policy Agent] and [ACAT$].[ACAT_EffectiveDate] = ( select MAX([ACAT$].[ACAT_EffectiveDate] ) from [ACAT$] where [ACAT$].[new_Agent_number] = [Second - Table$].[Policy Agent]and [ACAT$].[ACAT_EffectiveDate] > '2014-10-01')) ,
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''''''summing up all other columns''''''''''''''
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from [Second - Table$] group by [Second - Table$].[Policy Agent] ;

Hi Fei,
Thank you so much for the reply post. I just executed the same above SQL without INTO Statement and assigned the SQL result to ADODB recordset as below. If the time difference is due to the SQL query then below statements also should execute for hours
right, but it gets executed in seconds. But to copy the recordset to excel again it is taking hours. I tried copyfromrecordset,
getrows(), getstring(), Looping each recordset fields options and all of them taking same amount of time. Please let me know there is delay in time for this much small data
Even I tried to typecast all columns to double, string in SQL and still the execution time is not reduced.
First_Temp_Recordset.Open sql_qry, Tables_conn_obj, adOpenStatic, adLockOptimistic ''' OR SET First_Temp_Recordset = Tables_conn_obj.Execute sql_qry

Excel ADODB Sql Query Execution taking hours when manipulate excel tables why?

I have 28000 records with 8 column in an sheet. When I convert the sheet into ADODB database and copy to new excel using below code it is executing in less than a min
Set Tables_conn_obj = New ADODB.Connection Tables_conn_str = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & Table_Filename & ";Extended Properties=""Excel 12.0;ReadOnly=False;HDR = Yes;IMEX=1""" Tables_conn_obj.Open
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But when I change the query to manipulate one column in current table based on another table in the same excel and try to copy the results in another excel, it is taking more than one hour.. why it is taking this much time when both the query results returns
the same number of rows and column. I almost spend one week and still not able to resolve this issue.
Even I tried copyfromrecordset, getrows(), getstring(), Looping each recordset fields options all of them taking same amount of time. Appreciate any inputs...
select ( ''''''manipulating first column based on other table data''''''''''''''
iif( [Second - Table$].[Policy Agent] = (select max([ACAT$].[new_Agent_number]) from [ACAT$] where [ACAT$].[new_Agent_number] = [Second - Table$].[Policy Agent] and [ACAT$].[ACAT_EffectiveDate] = ( select MAX([ACAT$].[ACAT_EffectiveDate] ) from [ACAT$] where
[ACAT$].[new_Agent_number] = [Second - Table$].[Policy Agent]and [ACAT$].[ACAT_EffectiveDate] > '2014-10-01') ) , (select max([ACAT$].[Old_Agent_number]) from [ACAT$] where [ACAT$].[new_Agent_number] = [Second - Table$].[Policy Agent] and [ACAT$].[ACAT_EffectiveDate]
= ( select MAX([ACAT$].[ACAT_EffectiveDate] ) from [ACAT$] where [ACAT$].[new_Agent_number] = [Second - Table$].[Policy Agent]and [ACAT$].[ACAT_EffectiveDate] > '2014-10-01')) ,
iif( [Second - Table$].[Policy Agent] = (select max([ACAT$].[Old_Agent_number]) from [ACAT$] where [ACAT$].[Old_Agent_number] = [Second - Table$].[Policy Agent] and [ACAT$].[ACAT_EffectiveDate] = ( select MAX([ACAT$].[ACAT_EffectiveDate] ) from [ACAT$]where
[ACA T$].[Old_Agent_number] = [Second - Table$].[Policy Agent]and [ACAT$].[ACAT_EffectiveDate] <= '2014-10-01') ), (select max([ACAT$].[new_Agent_number]) from [ACAT$] where [ACAT$].[Old_Agent_number] = [Second - Table$].[Policy Agent] and [ACAT$].[ACAT_EffectiveDate]
= ( select MAX([ACAT$].[ACAT_EffectiveDate] ) from [ACAT$] where [ACAT$].[Old_Agent_number] = [Second - Table$].[Policy Agent]and [ACAT$].[ACAT_EffectiveDate] <= '2014-10-01')) ,
[Second - Table$].[Policy Agent] ))) as [Policy Agent],
''''''summing up all other columns''''''''''''''
(iif(isnull(sum([Second - Table$].[Auto BW-Line Of Business Detail])),0,sum([Second - Table$].[Auto BW-Line Of Business Detail]))) as [Auto BW-Line Of Business Detail],(iif(isnull(sum([Second - Table$].[Auto Farmers])),0,sum([Second - Table$].[Auto Farmers])))
as [Auto Farmers],(iif(isnull(sum([Second - Table$].[MCA])),0,sum([Second - Table$].[MCA]))) as [MCA],(iif(isnull(sum([Second - Table$].[CEA])),0,sum([Second - Table$].[CEA]))) as [CEA],(iif(isnull(sum([Second - Table$].[Commercial P&C])),0,sum([Second
- Table$].[Commercial P&C]))) as [Commercial P&C],(iif(isnull(sum([Second - Table$].[Comm WC])),0,sum([Second - Table$].[Comm WC]))) as [Comm WC],(iif(isnull(sum([Second - Table$].[Fire Farmers])),0,sum([Second - Table$].[Fire Farmers]))) as [Fire
Farmers],(iif(isnull(sum([Second - Table$].[Flood])),0,sum([Second - Table$].[Flood]))) as [Flood],(iif(isnull(sum([Second - Table$].[Kraft Lake])),0,sum([Second - Table$].[Kraft Lake]))) as [Kraft Lake],(iif(isnull(sum([Second - Table$].[Life])),0,sum([Second
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INTO [Excel 12.0;DATABASE=C:\Prod Validation\Database\Second Acat Table.xlsb].[Sheet1]
from [Second - Table$] group by [Second - Table$].[Policy Agent] ;

Hi Fei,
Thank you so much for the reply post. I just executed the same above SQL without INTO Statement and assigned the SQL result to ADODB recordset as below. If the time difference is due to the SQL query then below statements also should execute for hours
right, but it gets executed in seconds. But to copy the recordset to excel again it is taking hours. I tried copyfromrecordset,
getrows(), getstring(), Looping each recordset fields options and all of them taking same amount of time. Please let me know there is delay in time for this much small data
Even I tried to typecast all columns to double, string in SQL and still the execution time is not reduced.
First_Temp_Recordset.Open sql_qry, Tables_conn_obj, adOpenStatic, adLockOptimistic ''' OR SET First_Temp_Recordset = Tables_conn_obj.Execute sql_qry

Exact time of SQL query execution.

Hi,
Is there any way to get the exact time of execution of particular SQL query.
Oracle Version : 10.2.0.4.0
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Thx,
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In general it's pretty hard.
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Hi,
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******************

First off, be aware of the assumptions I'm making. The SQL you presented above strongly suggests (to me at least) that you have cursor for loops. If that's the case, you need to review what their purpose is and look to convert them into single statement DML commands. For example if you have something like this
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    ln_SomeValue    NUMBER;
BEGIN
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                some_value
            INTO
                ln_SomeValue
            FROM
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                    col2
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                target_table
            SET
                some_other_value = ln_SomeValue
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END;                            it could be rewritten as
DECLARE
BEGIN
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                b.some_value
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                some_table a,
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                b.some_other_value)
      VALUES(   b.pk_id,
                b.col2,
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END;It's going to take a bit of analysis and work but the fastest and most scalable way to approach processing data is to use SQL rather than PL/SQL. PL/SQL data processing i.e. cursor loops should be an option of last resort.
HTH
David

Sql query execution in jsp

can u help me to print multiple rows resulted from a sql query using jsp.

Map the ResultSet to a Collection of DTO's, use the JSTL's c:forEach tag to iterate through it inside a JSP page, use the HTML table, tr and td elements to present the data in a table.

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A/A

Hello,
In her attempt to help, need to know the answers to the following questions:
1 .- The 3 queries may return independently repeated same records or records?
1.a. - If you were to take the case, you would want that before two results appear equal only one row?
1.b. - If it is impossible to duplicated rows of each of the three sentences, then use and replace
operator 'UNION' with 'UNION ALL'.
Since the   operator 'UNION' operations makes 'SORT' to make the distinction between
results and penalizes volume data on performance.
2 .- He says that it is a 'report', no? Consultations are united? Because columns?
3 .- Do you know the 'EXPLAIN PLAN' of the sentence? If known, please send an email.Waiting for news, a greeting.
Edited by: RamonRQ on 21-oct-2011 3:54

SQL Query execution with LISTAGG

Hello,
I am trying to get some data using LISTAGG functionality.
I have below query with works fine with the table, but not with the rowsource which is based on same table.
SELECT COL1,LISTAGG(COL3, ',') WITHIN GROUP (ORDER BY COL2) AS fieldName FROM IOP_Sample_RS GROUP BY COL1it gives parsing error
line 1:22: expecting "FROM", found '('col 22 is '(' of LISTAGG function.
One more Question
Does UNION, MINUS works with RSQL in IOP?
Thanks,
Sumant Chhunchha.
Edited by: Sumant on Jun 15, 2011 5:04 AM

LISTAGG, UNION, MINUS is not supported with RSQL, instead you can massage your SQL query to load data into IOP and then use a simple RSQL query.

Clustering of SQL query execution times

In doing some query execution experiments I have noted a curious (to me, anyhow) clustering of execution times around two distinct points. Across about 100 tests each running 1000 queries using (pseudo-)randomly generated IDs the following pattern emerges. The queries were run from Java using all combinations of pooled/non-pooled and thin/oci driver combinations:
     100          *
     90          *
R     80          *
u     70          *
n     60          *
s     50          *
     40          *                                             *
     30          *                                             *
     20          *                                        *     *     *
     10          *     *                              *     *     *     *
          0     100     200     300     400     500     600     700     800     900     1000     1100     1200
                                   Time(ms)Where about half of the total execution times cluster strongly about a given (short) time value with a smaller but broader clustering at a significantly slower mark, with zero intermediate values. The last point is the one I find most curious.
What I would have expected is something like this:
     100
     90
R     80
u     70
n     60
s     50
     40                              *
     30                         *     *     *
     20                    *     *     *     *     *     *
     10          *     *     *     *     *     *     *     *     *     *
          0     100     200     300     400     500     600     700     800     900     1000     1100     1200
                                   Time(ms)The variables I have tentatively discounted thus far:
-query differences (single query used)
-connection differences (using single pooled connection)
-garbage collection (collection spikes independent of query execution times)
-amount of data returned in bytes (single varchar2 returned and size is independent of execution time)
-driver differences (thin and oci compared, overall times differ but pattern of clustering remains)
-differences between Statement and PreparedStatement usage (both show same pattern)
I know this is a rather open-ended question, but does the described pattern seem faniliar or spark any thoughts?
DB-side file I/O?
Thread time-slicing variations (client or DB-side)?
FWIW, the DB is 9.2.0.3 DB and the clients are running on WinXP with Java 5.0 and 9i drivers.
Thanks and regards,
M

Further context:
Are your queries only SELECT queries ?
Yes, the same SELECT query is used for all tests. The only variable is the bind variable used to identify the primary key of the selection set (i.e. SELECT a.* from a, b, c where a.x = b.x and b.y = c.y and c.pk = ?) where all PKs and FKs are indexed.Do the queries always use the same tables, the same where clauses ?
Yes, the same tables are always invoked. The where clauses invoked are identical with the excepton of the single bind variable as described above.Do your queries always use bind variables ?
A single bind variable is used in all invocations as described above.Are your queries also running in single user mode or multi user mode (do you use SELECT FOR UPDATE ?) ?
We are not using SELECT FOR UPDATEDid something else run on the database/on the server hosting the database on the same time ?
I have not eliminated the idea, but the test has been repeated roughly 100 times over the course of a week and at different times of day with the same pattern emerging. I suppose it is not out of the question that a resource-hogging process is running consistently and constantly on the DB-side box.Thanks for the input,
M

SEM_MATCH query execution time when a predicate is set as a variable

Hello there,
Our ontology contains 70 million triples (12.5 million asserted triples and 58 million inferred triples). We created a virtual model which includes both asserted and inferred triples).
Our semantic network index configuration is 'PSCM' (index status is valid).
The problem we encounter is when we run a SEM_MATCH query which includes a predicate as a variable, the query ran for 22 seconds. When a similar query is run when the variable is subject or an object or both the time for the SEM_MATCH query execution is 0.2 seconds. Is this reasonable? What do we do wrong?
For example:
1. Predicate as a variable (execution time is 22 seconds):
SELECT a FROM TABLE ( SEM_MATCH
( ' { <http://www.tomproj.com/rep#entity_4> ?a 4 }',
SEM_MODELS( 'TOM_VIRTUAL_MODEL') ,
NULL,
NULL,
NULL,
'ALLOW_DUP=T'));
2. Subject as a variable (execution time is 0.2 seconds):
SELECT a FROM TABLE ( SEM_MATCH
( ' { ?a <http://www.tomproj.com/rep#id> 4 }',
SEM_MODELS( 'TOM_VIRTUAL_MODEL') ,
NULL,
NULL,
NULL,
'ALLOW_DUP=T'));
2. Object as a variable (execution time is 0.2 seconds):
SELECT a FROM TABLE ( SEM_MATCH
( ' { <http://www.tomproj.com/rep/#entity_4> <http://www.tomproj.com/rep#id> a }',
SEM_MODELS( 'TOM_VIRTUAL_MODEL') ,
NULL,
NULL,
NULL,
'ALLOW_DUP=T'));
Cheers,
Doron

Hi,
So far no lack, None of the solutions are working.
Query execution time didn't change after executing the following:
1. SEM_APIS.DROP_SEM_INDEX('SCP');
2. SEM_APIS.ADD_SEM_INDEX('SCPM');
3. SEM_APIS.ALTER_SEM_INDEX_ON_MODEL('TOM','SCPM','REBUILD');
4. SEM_APIS.ALTER_SEM_INDEX_ON_MODEL('TOM_TF','SCPM','REBUILD');
5. SEM_APIS.ALTER_SEM_INDEX_ON_RULES_INDEX('TOM_RI','SCPM','REBUILD');
My original query (see below) execution time remains 22 secs.
SELECT a FROM TABLE ( SEM_MATCH
( ' { <http://www.tomproj.com/rep#entity_4> ?a 4 }',
SEM_MODELS( 'TOM_VIRTUAL_MODEL') ,
NULL,
NULL,
NULL,
'ALLOW_DUP=T'));
When running the SEM_MATCH on each model ('TOM,'TOM_TF') separately execution time was very fast (~0.007 secs):
1. SELECT a FROM TABLE ( SEM_MATCH
( ' { <http://www.tomproj.com/rep#entity_4> ?a 4 }',
SEM_MODELS( 'TOM') ,
NULL,
NULL,
NULL,
NULL));
2. . SELECT a FROM TABLE ( SEM_MATCH
( ' { <http://www.tomproj.com/rep#entity_4> ?a 4 }',
SEM_MODELS( 'TOM_TF') ,
NULL,
NULL,
NULL,
NULL));
When running the query on both models, execution time was 54 secs:
SELECT a FROM TABLE ( SEM_MATCH
( ' { <http://www.tomproj.com/rep#entity_4> ?a 4 }',
SEM_MODELS( 'TOM','TOM_TF') ,
NULL,
NULL,
NULL,
NULL));
We also run the original query via the Jena Adaptor using Java language and SPARQL, but the results were similar.
As for using parallel parameter in SEM_APIS.ALTER_SEM_INDEX…, since we are using Oracle 11g release 1 the SEM_APIS.ALTER_SEM_INDEX doesn’t support the parallel parameter as far as we know.
In Oracle 11g release 2 the SEM_APIS.ALTER_SEM_INDEX was extended to support the use of 'parallel' parameter.
Any ideas on what do we do wrong?
Cheers,
Doron

Check/uncheck record results on more than one step at a time

I have one hundred plus sequence files and several thousand steps total. Checking and un-checking record results one step at a time takes a long time. I'd like to be able to select several steps at a time then check or un check the "Record Results" option for all those steps at once. How do I do this? I'm using TestStand 2.0

Hi Kevin,
Thanks for contacting National Instruments.
Do you want to disable result recording for ALL sequences on this station? If so, you can turn on this option in the TestStand sequence editor (Configure >> Station Options, turn ON checkbox "Disable result recording for all sequences").
However, if you only want to do this for selected sequence files, then Ray is correct - you would need to write an external routine that will automate this for you. Attached is a zipfile containing a VBScript that will iterate through one sequence file ("c:\test.seq") and change all steps (all sequences, including Main/Setup/Cleanup) to turn off "Record Results". It first saves a backup copy of the sequence file, makes the changes, then save
s the modified sequence file. You can enhance this script to work for more than one sequence file by using Microsoft's FileSystemObject.
The VBScript uses a DLL I created, which exposes the TestStand 2.0 Engine object as an ActiveX DLL. Before you can run the VBScript, you will need to register this DLL:
regsvr32 TSEngine.dll
Then, the VBScript can be executed just by double-clicking it. Hopefully this helps get you started toward creating an automated way of solving this problem!
David Mc.
National Instruments
Attachments:
ts2seqfiles.zip ‏4 KB

SQL query execution in DB02 hangs if record set is more than 50000

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