Convert SQL Server DB To Oracle 10g - Optimizing View And Its Objects?
Oct 8, 2010
I'm converting a SQL Server db to Oracle 10g. So far it's going pretty well. However, I've hit a significant performance snag trying to run queries against the converted view whose SQL is below. In SQL Server it runs pretty quickly, 10-15 secs. This query presently returns about 1.7 million records. code below, and assuming I've done nothing to optimize the database or the objects involved,
BS
------------------
CREATE VIEW DST_TMP_VIEW_ACCT_XACTN_CRN AS
SELECT CUSTACCNUM,
FUNDID,
[code]...
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Dec 23, 2010
I have a view, below, which does few left outer joins to the same V_MARKET view to get data i need. When I run SQL by itself, ut runs pretty fast, 2-5 seconds. But when I do "select * from V_DEPT_DATA where busines_date = '01-APR-10'", it takes more than 10 minutes to run. I added all needed indexes and still have problems with it .
CREATE OR REPLACE VIEW V_DEPT_DATA
AS
SELECT
v1.business_date ,
v1.division ,
v1.department ,
v1.account ,
en.trader ,
[code]........
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Apr 20, 2011
i want create view to select all invalid objects in database.So i create this one:
CREATE OR REPLACE FORCE VIEW INVALID_OBJECTS_DETAILS
(
DETAILS
)
AS
SELECT DISTINCT a.owner || ', ' || a.object_name
FROM dba_objects a, dba_source b
WHERE a.owner = b.owner
AND a.object_name = b.name
AND a.object_type = b.TYPE
AND a.status != 'VALID'
AND b.text NOT LIKE '%@%';
But I want only select invalid objects without a database link .
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Feb 5, 2012
I have the following function that I am using as a template for any function that executes a select statement and return a single value as an output.
The function is working but I wanted to take an expert opinion if it can be optimized.
CREATE OR REPLACE FUNCTION AFESD.F_AGR_GET_AGREEMENT_SERIAL
(I_NUMBER0 IN NUMBER, S_SUB_NUMBER VARCHAR2 DEFAULT NULL, I_TYPE_ID NUMBER)
[Code]....
In addition I want to use the parameter S_SUB_NUMBER that can be NULL and add it to the select statement of the cursor, but I dont know how to do that in one statement.
CURSOR C_AGREEMENT
IS
SELECT AGREEMENT_SERIAL
FROM VW_AGR_AGREEMENT
WHERE NUMBER0 = I_NUMBER0
AND TYPE_ID = I_TYPE_ID
-->and sub_number is null;
-->and sumb_number = s_sub_number
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May 10, 2013
Is there a function that allows the following?
select SOME_FUNCTION('N','E','S','W') from dual;
That returns
N
E
S
W
Currently I'm just doing the following
WITH direction AS
(SELECT 'N' dir FROM DUAL
UNION
SELECT 'E' FROM DUAL
UNION
SELECT 'S' FROM DUAL
UNION
SELECT 'W' FROM DUAL)
SELECT *
FROM direction;
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Jun 27, 2013
We have a requirement where we need to publish only the delta/changes made to an existing materialized view. This MV is fast refreshed over a db link. Since, MV will have all the data, we won't
1] Created MV Log
CREATE MATERIALIZED VIEW LOG ON SHRTS_FLNG_PRCSD
WITH PRIMARY KEY, SEQUENCE
INCLUDING NEW VALUES;
2] Create MV
CREATE MATERIALIZED VIEW MV_SHRTS_FLNG_PRCSD (ITRTN_NB,UNQ_ID,XCHNG_ORG_ID,FLNG_ST,MAX_PRCSD_ITRTN_NB,SBMTD_SCRTS_AM,SBMTD_PSTN_AM)
BUILD IMMEDIATE
REFRESH FAST ON DEMAND
WITH PRIMARY KEY
AS
[code]....
3) I can see deltas on MV logs.
UNQ_IDITRTN_NBSEQUENCE$$SNAPTIME$$DMLTYPE$$OLD_NEW$$CHANGE_VECTOR$$XID$$
{FDE35AAC-E749-4507-972F-F26F5982E046}121/1/4000UU28002.81485714140869E15
{FDE35AAC-E749-4507-972F-F26F5982E046}131/1/4000UN28002.81485714140869E15
{FDE35AAC-E749-4507-972F-F26F5982E046}181/1/4000DO00002.81491297598354E15
4) I have created a temp table to capture the diff between MV and newly inserted Deltas. I have added SEQ_NB column using Oracle sequence to capture the diff
CREATE TABLE MKT_CMPLC.TMP_SHRTS_FLNG_PRCSD
(
ITRTN_NB NUMBER(2) NOT NULL,
UNQ_ID CHAR(38 BYTE) NOT NULL,
XCHNG_ORG_ID NUMBER(8) NOT NULL,
FLNG_ST VARCHAR2(9 BYTE),
[code]....
5) I have refreshed the MV
exec dbms_mview.refresh('MV_SHRTS_FLNG_PRCSD');
6) In order to capture the new inserts, I am using following DML
INSERT INTO tmp_SHRTS_FLNG_PRCSD SELECT ITRTN_NB,
UNQ_ID,
XCHNG_ORG_ID,
FLNG_ST,
MAX_PRCSD_ITRTN_NB,
SBMTD_SCRTS_AM,
[code]....
We need only delta records. Is there any way to extract actual rows from MV logs.
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Nov 13, 2012
The scale of the tests that generate the following scenario is not huge right now, only 50 users simulated (or you can think of them as independently running threads if you like). But here is the crunch, the queries generated (from generic transaction layer) are all running against a table that has 600 columns! We can't really control this right now, but this is causing masses amounts of IO (5GB per request) making requests queue for disk availability (which are setup RAID 0/1); its even noticable for as few as 3 threads.
I have rendered the SQL on one occasion to execute in 13 seconds for a single user but this appears short lived as when stats were freshly gathered it went up to the normal 90-120 seconds. I've added the original query to the file, however the findings here along with our DBA (who I trust implicitly) suggest that no amount of editing the query will improve the response times, increasing the PGA/SGA (currently 4/6GB respectively) will only delay the queuing for a bit and compression can work either. In short it looks as though we've hit hardware restrictions already for this particular scenario.
As I can't really explain how my rendered query no longer takes 13 seconds, it's niggling me that we might be missing a trick.So I was hoping for some guidance on possible ways of optimising these type of queries against such wide tables, in other words possibilities that we haven't considered...
Attached is the query and plan.
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Jan 17, 2013
can we change the existing materialized view to normal view? if yes how?
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May 11, 2012
I have a doubt on invalid objects.What would be the impact to database and application if there are many invalid objects in database?
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Jul 28, 2010
Are oracle view have Dynamic view function?
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Jun 2, 2011
I want to move 350 database objects from one database to another database schema.
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Jul 30, 2012
How can I delete all the objects from my database?
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Sep 20, 2010
Two different says in different documentation as below.
1) Import required same tablespace to fit the objects, otherwise it throws error.
2) Import by default uses the default tablespace to fit the objects, but some times it uses SYSTEM tablespace also.
confirm with the correct one.
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Mar 22, 2011
I am getting below error while connecting to sqlplus.
SQL*Plus: Release 10.2.0.5.0 - Production on Tue Mar 22 12:47:48 2011
Copyright (c) 1982, 2010, Oracle. All Rights Reserved.
ERROR:
ORA-06550: line 1, column 7:
PLS-00201: identifier 'DBMS_OUTPUT.DISABLE' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
[code]....
Executed the below scripts but it didnt resolve the issue, whereas some of the SYS objects and catproc got invalid...
dbmsotpt.sql
dbmsapin.sql
Now even after reexecuting the catproc.sql and utlrp...Sys objects and the catproc status is still INvalid.
I tried to manually compile the sys objects, but it didnt work.
OWNER SUBSTR(OBJECT_NAME,1,40) OBJECT_TYPE
-------------------- ---------------------------------------- --------------------
SYS DBMS_XPLAN PACKAGE BODY
SYS AQ$AQ_SRVNTFN_TABLE VIEW
SYS DBMS_LOGREP_DEF_PROC PACKAGE
SYS DBMS_LOGREP_DEF_PROC PACKAGE BODY
[code]....
how to go about making the SYS objects and catproc VALID and resolve the error which i mentioned above.
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Mar 30, 2011
I told about Oracle multi master replication below.
Can I replicate some objects of "X" schema at A server to "Y" schema at B server using MM replication?
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Feb 1, 2011
Why is that we recompile all invalid objects after import and how the object gets invalid during import?
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Mar 28, 2011
How can i know which objects used keep buffer cache?
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May 6, 2012
How monitor the unusable objects in oracle 10g (10.2.0.1.0) os rhel 5? is it same as invalid objects and can be monitor as same?
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Sep 13, 2013
Iam having the following query, After executing schema refresh using export & import , getting count of database objects comparison to be done,
-- SELECT 'TRUNCATE TABLE '||OWNER||'.'||TABLE_NAME||' ;' FROM DBA_TABLES WHERE OWNER='PRICING' order by TABLE_NAME;
SQL> SELECT 'select count(*) from '||OWNER||'.'||TABLE_NAME||' ;' FROM DBA_TABLES WHERE OWNER='PRICING' order by TABLE_NAME;
The output expected was to display each table name in a schema following below with corresponding number of records to be displayed, but it wasn't showing correctly.
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Jul 6, 2010
i am trying to shrink tablespace of 100gb which has objects.
i tried coalesce,then i try to shrink and also tried to resize the datafile with no luck
error message can't resize
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Aug 3, 2012
I am getting the following errors when I try drop a tablespace.
I already did the following.
a) The tablespace & its datafiles offline.
b) I have purged dba_recyclebin.
SQL> drop tablespace db_maintenance including contents and datafiles;
drop tablespace db_maintenance including contents and datafiles
*
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-38301: can not perform DDL/DML over objects in Recycle Bin
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Jan 31, 2012
here are so much invalid dba_objects. Do I need to care/repair?
SELECT owner, COUNT (*)
FROM dba_objects
WHERE status != 'VALID'
GROUP BY ROLLUP (OWNER)
output
ZIM4_RO71
ZIM473
PUBLIC16
SYS35
195
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May 25, 2011
I was importing one schema from Oracle 10g to 11g using traditional import. I imported as a SYS user, so all the objects created in SYS schema. how can I remove these objects and retain only default SYS objects
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Jan 31, 2012
I heard that USERS tablespace should not contain any other application schema objects.
If the above statements is true , why it should not contain other schema objects ?
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Jun 27, 2012
One of my friends is facing a peculiar problem where objects are getting "Invalid" during execution I suspect it is happening as they are changing system date during their testing (time travel) which can create conflicted last_ddl_time on objects having dependencies
Consider a scenario
[1] system date is 10-06-2012 there are total 10 objects which has status as 'valid'
[2] the system date is changed to 10-07-2012 Now out of 10 Only 5 objects are compiled During execution ORA-04065,ORA-06508, ORA-06512 are observed
[3] the system date is brought back to 10-06-2012 Again during execution ORA-04065,ORA-06508, ORA-06512 are observed
suppose in step 2 objects are compiled whereas there synonyms are compiled in step 1, only thus last_ddl_time for objects will be later to that of its' synonym...
Does database validate last_ddl_time for objects having dependency during execution and then auto-compiles or invalidates the objects?
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Jan 23, 2013
I`m migrating a mysql 5.0 database to Oracle 11g. I used Oracle's Sql developer and with a workaround i could convert tables, constraints, indexes, some triggers and created sequences.
My question is, what happen with stored procedures and functions, they didn't pass. I've been searching and i found here hey have to be rewritten. Is there any way to convert those objects ? I can't afford to do it manually because the mysql database has almost 400 of them and they aren't small.
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Apr 4, 2013
I'm using the below data base version
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production.
I have created a pl sql type as object with five attributes as below.Now im trying to insert only 3 attributes with the attribute names ( As like insert into statement with column names).
Create type address_test as object (
Streetno varchar2(20),
Locality varchar2(20),
City varchar2(20),
Pin varchar2(7),
Country varchar2(20))
[code]....
Is that possible to use attribute names in the insert statement of column object type ?
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Dec 1, 2011
we are doing database upgradation 10g2 to 11gr2, while doing pre check before upgrdation ..we have found few duplicate objectes on sys and system schema..
SQL> column object_name format a30
select object_name, object_type
from dba_objects
where object_name||object_type in
(select object_name||object_type
from dba_objects
where owner = 'SYS')
[code]...
As per metalink note "How to Clean Up Duplicate Objects Owned by SYS and SYSTEM Schema [ID 1030426.6]"..
im going to do drop only below objects ..
DROP TABLE SYS.HELP;
DROP INDEX SYS.HELP_TOPIC_SEQ;
DROP TABLE SYSTEM.PLAN_TABLE;
and ignore below objects ...
DROP TABLE SYSTEM.AQ$_SCHEDULES;
DROP INDEX SYSTEM.AQ$_SCHEDULES_PRIMARY;
DROP PACKAGE SYSTEM.DBMS_REPCAT_AUTH;
DROP PACKAGE BODY SYSTEM.DBMS_REPCAT_AUTH;
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Oct 3, 2011
select sum(bytes/1024/1024) from dba_segments where owner='IPPS';
Does the above finding means that IPPS has use up 'this amount' of space in the database from all his objects?
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Feb 1, 2012
I am having one prod and one devl with prod having stream setup.
I have to refresh devl with prod , but if i will go by full expdp then db_links also get imported into the devl and may cause problem in devl.
Is there any other way using expdp to exclude the stream objects while doing import.
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