WHY PARAMETRIZED CURSOR IS SLOW
I have the following query which is very slow
CURSOR c_party_ids (p_party_name VARCHAR2, p_party_type VARCHAR2, p_eval_active NUMBER)
IS
SELECT a.party_id,
a.party_type,
b.cust_account_id,
b.attribute17
[code].......
I have a quick question, can we create a cursor as parametrized so that it picks up the table name as an input to the procedure, but it is not compiling.
CREATE OR REPLACE PROCEDURE CORPREPRECON.D_Q_CHECK_P (IN_TABLE_NAME IN VARCHAR2 )
IS
V_NULL_CHECK NUMBER(10) := 0;
V_BLANK_CHECK NUMBER(10) := 0;
V_LEN_CHECK NUMBER(10) := 0;
CURSOR C1 IS SELECT * FROM ||IN_TABLE_NAME;
[code]......
declare cursor c_abc (v_eno in varchar2,v_ename in varchar2) is
select empno,ename from emp
where empno=v_eno
and ename=v_ename;
v_eno emp.empno%type;
v_ename emp.ename%type;
begin
for re_ab in c_abc(1,'Dummy') loop
dbms_output.put_line( to_char(re_ab.v_eno)||' - '|| re_ab.v_ename);
end loop;
end;
/
I am getting error message ORA:06550
V_ENO must declared ..
Parameterized cursor for loop ..
I am creating a button , on this button i call a procedure
e.g. excel
on this procedure i call parametrized cursor ...but i give me error i dont know what is this ..my code is like this
Quote:
PROCEDURE excel IS
CURSOR C2(v_link_nm varchar2) is
select alt_loc LOC, alt_inv_no INV_NO, alt_inv_dt INV_DT, alt_amt AMOUNT, alt_rvc2 ALT_RVC,
alt_doc_no DOC_NO, alt_doc_typ DOC_TYP, alt_authid AUTH_ID, alt_authdt AUTH_DT
from v_link_nm
[code]......
when i compiled i get error v_link_nm not defined...
I'm dealing with an ORA-1000 error in a Pro*C application where all the cursors are correctly closed (or so it seems to me).
Here is the code for a simple program which reproduces the problem:
Each cursor is opened in a PL/SQL package:
CREATE OR REPLACE PACKAGE emp_demo_pkg AS
TYPE emp_cur_type IS REF CURSOR;
PROCEDURE open_cur(curs IN OUT emp_cur_type, dept_num IN NUMBER);
END emp_demo_pkg;
[Code]....
While testing the initialization parameter open_cursors is set to 50.
It's my understanding that Oracle doesn't close the cursors until it needs the space for another cursor, which in my test case seems to happen when I enter a value of 50 or bigger for "number of loops". To see how oracle is reusing the cursors, while the test program is running I run SQL*Plus and query v$sesstat for the session that's running the test with the following sentence:
select name, value
from v$sesstat s, v$statname n
where s.statistic# = n.statistic#
and sid = 7
and name like '%cursor%';
Even before I enter a value for number of loops I can see that the session opened 4 cursors and closed 2 of them:
NAME VALUE
---------------------------------------------------------------- ----------
opened cursors cumulative 4
opened cursors current 2
Entering a value of 5 for number of loops yields
NAME VALUE
---------------------------------------------------------------- ----------
opened cursors cumulative 11 <----- 7+
opened cursors current 8 <----- 6+
With a value of 30
NAME VALUE
---------------------------------------------------------------- ----------
opened cursors cumulative 36 <----- 25+ (apparently, Oracle reused at least 5 cursors)
opened cursors current 33 <----- 25+
With a value of 47
NAME VALUE
---------------------------------------------------------------- ----------
opened cursors cumulative 53 <----- 17+
opened cursors current 50 <----- 17+
Now I reached the upper limit set by the initialization parameter open_cursors.
Entering a value of 48, I get the ORA-1000 error.
ORA-01000: maximum open cursors exceeded
ORA-06512: at "SCOTT.EMP_DEMO
Since I open and close the cursor in the same loop iteration, I expect to find in every iterarion 1 explicit cursor and a number of implicit cursors (the PL/SQL call along with the so-called recursive cursors), but I don't expect the sum of all of them to be greater than 50. If my understanding is correct Oracle should be reusing the 50 cursors previously marked as "closeable", not raising the ORA-1000 error.
Is it possible to:
-define a cursor with bind variables
-get a cursor record from these cursor
-and pass the bind variable in the OPEN clause
Did'nt succeed as shown in the example.
SET SERVEROUTPUT ON SIZE 900000;
DECLARE
--works fine
CURSOR c1 IS SELECT * FROM USER_TABLES WHERE rownum<3;
--doesn't work
--CURSOR c1 IS SELECT * FROM USER_TABLES WHERE rownum<:1;
crec c1%rowtype;
BEGIN
--works fine
OPEN c1;
--isn't possible ?
--OPEN c1 USING 3;
[Code]....
just looking around to use the new feature available in oracle 11g to convert the dbms_sql numeric cursor to reference cursor, how to do it?
parse and execute the sql string first with dbms_sql and then convert it to ref cursor?
I want to return ref cursor based on explicit cursors
create table jumbo(id number, name varchar2(20));
insert into jumbo values(1,'jumbo');
create table mumbo(id number, name varchar2(20));
insert into mumbo values(1,'mumbo');
commit;
[Code].....
The above procedure has compilation errors when I am trying to open ref cursor
LINE/COL ERROR
-------- --------------------------------------------------------
20/24 PL/SQL: SQL Statement ignored
20/38 PL/SQL: ORA-00942: table or view does not exist
32/24 PL/SQL: SQL Statement ignored
32/38 PL/SQL: ORA-00942: table or view does not exist
SQL>
Can i user exist when cursor will using For Cursor .
View 15 Replies View RelatedThe issue is slow insertion in particular table(i.e A Table) it means insertion in all other tables(i.e B, C, D tables) in same schema is going properly but only when i am trying to insert in one particular table(i.e A table) in same schema it takes long time to complete insertion. Daily insertion is 6000 rows.
I have check all the details like Tablespace size, Analyzing of table, Analyzing of indexes and all. There is no any error alertlog file.
We have two database instances on the same server. One was left at 9.2.0.7 and one was upgraded to 10.2.0.3. Connecting externally (sqlplus '/as sysdba') to the 9.2.0.7 database is lightning fast. Connecting externally to the 10.2.0.3 database is very slow, comparatively speakiing. This is on an IBM AIX-5L (64-bit) machine. We are using "tnsnames".
View 10 Replies View RelatedI am migrating a oracle 9i database to 11g r3. I can only use imp. As the database is huge, I have split the exp dump by schemas. In my recent test, i have split the schema into 4 seperate threads to be imported into the new oracle11g database. The 4 thread of imp consist of almost similar sizes of schema (Eg thread 1 - Schema 1, 2 ,3. Thread 2 - Schema 4,5,6 etc)
All the dump files are in the same mount point. When i execute the import (4 threads) together, the total import timing is each thread is between 2.5 days to 3.5 days.
Then i proceed to try only 1 thread, only 2 hrs. So could this be a IO issue or oracle memory problem?
Specs
IBM AIX 6.1, 32GB RAM
Oracle
24GB AMM
Number of processes 500
We have done cloning of our ORACLE APPLICATION(11i),after that performance of ERP is getting slow (like fetching of data). What we can do to increase the performance.
View 1 Replies View Relatedwe are busy updating one databasee from a windows platform 2003 oracle 10G to a linux and oracle 11r2
We exported/imported the data and it looks ok Explain plans look the same . but our heavy batches are twice slower than on the windows box ,the two top events are disk related, sequential and scattered reads there are 90% of the time of the batch job , i read some white paper and found that using ASM can be bad in some cases the same with the linux for this particular kind of scattered reads , i was just wondering if just changing the SGA to 10GB instead of 4GB to get more cache and speedup the things .
We are using one software it is a test tool for verify the data base posting speed from server to client systems. In windows 2008 R2, database posting speed is very slow when compare to windows 2003 server .
Server configuration is same for both servers ( RAID 5 , RAM 4 GB) how we can improve writing performance in Oracle
I am using :
Database : Oracle 8i
Application Server: Oracle AS 9i
Developer Suite : Oracle 6i(forms & reports)
I have created some character reports in oracle reports 6i.. when reports used run from my ERP(oracle 6i oriented) ... report usually took time to create on server. Sometimes my ERP used to hang up due to busy reports generation. And then we have to kill some processes to finally create charater reports on emergency basis.What is the valid reason for slow generation of report(character file )?
i have a nightly import ( about 20 tables ) and it takes up to 5 hours..we have one table of about 800,000 lines and the rest are between 1000 and 200,000 this is very slow when i monitor the import i see a very long amount of wait for the SQLnet from client ,
i run the import on the Database server itself .. if i check the current statement i see it's moving from one to one for instance i have
SELECT /*+ all_rows ordered */
"A".ROWID, 'REPORT', 'CONTRACT_LVL', 'SYS_C001329497'
FROM "REPORT"."CONTRACT_LVL" "A"
WHERE NOT (LENGTH (bonus_nat) <= 31)
then
SELECT /*+ all_rows ordered */
"A".ROWID, 'REPORT', 'CONTRACT_LVL', 'SYS_C001684584'
FROM "REPORT"."CONTRACT_LVL" "A"
WHERE NOT (LENGTH (outcome_cd) <= 1)
etc and it takes hours DB is on windows 2003 runnin oracle RDBMS 9.2.0.7 while the import screen show 185000 lines imported..I also see a lot of consistent gets for this sessions raising at that time..Would it be better to export import without statistics ?
I need also to mention that the dump file comes from a linux hosted Database don't think it will make the difference for a exp/imp.It's a peoplesoft Database there are a lot of tables more than 15000 and if i take the table mentioned above and i want to check its constraints it takes decade before toad can display them.I have seen that we have a incredible amount of constraints on those tables it might be the reason .
I just wonder if the system catalog needs to be tuned ? /* Update */ why but now the huge number of wait is no as "Library cache lock".
I am working on an SAP application migration project using Oracle 10.2.0.2 database. We are migrating the application from Windows to Solaris.
During the process we are facing problem with very slow insert operation on a particular table.The server's capacity is very good and so no resource bottleneck.
The table contains around 2,70,000 rows and inserting at around 100 rows per 10 seconds.
The table contains following data types.
SQL> desc SAPDATDB.CAF_GP_VALDEF;
Name Null? Type
----------------------------------------- -------- ----------------------------
VAL_UUID NOT NULL NVARCHAR2(34)
VAL_GUID NOT NULL NUMBER(10)
VAL_CLOB NCLOB
We have a function that is called in various other PL/SQL packages, and performance has always been very good. On 29th Sept we upgraded our db to 10.2.0.5.0 and since then, a package that calls the function has gone from ~4mins, to ~2.5hrs to run.
In PL/SQL Developer, a simple select that calls the function has gone from ~0.5secs to retrieve the first 100 rows, to ~12secs. I ran a profile of the main package, which highlighted the where the bottleneck was (a fetch from an explicit cursor). Running an explain plan on the cursor SQL doesn't really show up anything untoward.
However, I found that if I subtly changed the cursor SQL, (so that it did the same thing, but was written differently), it fixed the performance problems.
where ade_start_date between cpDate-cpDays and cpDate-1
/*and ade_start_date < cpDate
and ade_start_date >= (cpDate-cpDays)*/
From this, we thought that there may have been a bad cached execution plan which the change of code forced a recalculation of. However, about 2 hours later, the changed code ran slowly again. So a further subtle change was made, which fixed the issue again. Until this morning, when it was running slowly again.
This feels like it is CBO/stats related potentially, but is out of my area of knowledge unfortunately. We have our DBA investigating this, but there may be things I can test to narrow down the possibilities in the meantime.
All my following query is running fine.
SELECT pd,
vr_date,
x.vr_no,
vr_sn,
cac,
ac,
nar,
[code]....
but problem is that when above query is used or oracle reports then and lexical parameter is used then i slows down more than 100 times
SELECT pd,
vr_date,
x.vr_no,
vr_sn,
cac,
[code]....
above query is copy of top query but differnce is that &P_Unt_Cls lexical parameter is used instead of and Unit in(29,34,35,36,37,38,44,45,60,70,71), I am unable to understand why it slow down query.
I am running one simple delete statement in one table with rownum<10000 but it is taking nearly 10 to 15 mins.Table doesn't have any child table rows and triggers.
View 13 Replies View RelatedI have big trouble with some Update query on Oracle 11G.I have a set of tables (5) of identical structures and a view that consists in an UNION ALL of the 5 tables.None of this table contains more than 20 000 rows.Let's call the view V_INTE_NE. Each of the basic table has a PRIMARY KEY defined on 3 NUMBERS(10,0) -> INTE_REF / NE_REF / INSTANCE.
Now, I get 6 rows in another table and I want to update my view from the data of this small table (let's call it SMALL). This table has the 3 columns INTE_REF / NE_REF / INSTANCE.
When I try to join the two tables :
SELECT * FROM T_INTE_NE T2
WHERE EXISTS ( SELECT 1 FROM SMALL T1 WHERE T2.INTE_REF = T1.INTEREF AND T2.NE_REF = T1.NEREF AND T2.INTE_INST = T1.INSTANCE )
I get the 6 lines in 0.037 seconds
When I try to update the view (I have an INSTEAD OF trigger that does nothing (just return for testing even without modifying anything), I execute the following query :
UPDATE T_INTE_NE T2
SET INTE_STATE = -11 WHERE
EXISTS ( SELECT 1 FROM SMALL T1 WHERE T2.INTE_REF = T1.INTEREF AND T2.NE_REF = T1.NEREF AND T2.INTE_INST = T1.INSTANCE )
The 6 rows are updated (at least TRIGGER is called) in 20 seconds.
However, in the execution plan, I can't see where Oracle takes time to achieve the query :
Plan hash value: 907176690
[code]....
Predicate Information (identified by operation id):
2 - access("T2"."INTE_REF"="T1"."INTEREF" AND "T2"."NE_REF"="T1"."NEREF" AND
"T2"."INTE_INST"="T1"."INSTANCE")
Note- dynamic sampling used for this statement (level=2)
Statistics
-----------------------------------------------------------
3 user calls
0 physical read total bytes
0 physical write total bytes
0 spare statistic 3
0 commit cleanout failures: cannot pin
[code]....
I get exactly the same execution plan (when autotrace is ON).Furthermore, if I try to do the same update on each of the basic tables, I get the rows updated instantaneously.
We converted our Power builder application from Oracle 10g to Oracle 11g. We are getting very slow to retrieveing data from the server.Basically we have noticed the following system internal sqls taking more time during our sql calls.
My schema Name : CMATISPROD
Oracle Version : 11.2.0.2.0
Indexes are moved separte table space.how to resolve this problem.
SELECT index_name, uniqueness
FROM SYS.all_indexes
WHERE table_owner = 'CMATISPROD' AND table_name = 'EXPRESSIONS';
* Formatted on 2011/12/15 14:19 (Formatter Plus v4.8.0) */
[code]...
data pump export is very slow. For 50GB export has taken more than 24Hrs with one below error:
Database Version:11.2.0.2.0
OS: Windows server 2008 r2
Increased 10GB RAM and CPU 6 to 8 then also same issue
Error:
ORA-31693: Table data object "BNCSDB"."MS_DATA_PTORE" failed to load/unload and is being skipped due to error:
ORA-02354: error in exporting/importing data
ORA-01555: snapshot too old: rollback segment number 20 with name "_SYSSMU20_4037596720$" too small
Export log:
Export: Release 11.2.0.2.0 - Production on Tue May 14 20:03:25 2013
Copyright � 1982, 2009, Oracle and/or its affiliates. All rights reserved.
;;;
Connected to: Oracle Database 11g Release 11.2.0.2.0 - 64bit Production
Starting "SYSTEM"."SYS_EXPORT_SCHEMA_01": system/********@orcl dumpfile=BCSDB04_19.dmp logfile=BCSDB04_19.log
[code]...
I am trying to insert huge data into another huge table which is almost taking around 2-3 hrs. See my below query
INSERT /*+ APPEND *//*+ NOLOGGING */ INTO DB1.Table1 SELECT * FROM DB2.Table2 ;
COMMIT;
Both Table1 and Table2 have same structure and table1 is master table having 100 Billion records and table2 having 30 Million records. This is a direct insert where each day this operation carried.
I have created a MV joining 10 tables with FAST REFRESH ON COMMIT It made my sytem very slow.
View 18 Replies View RelatedI am finding Oracle sql developer start up to be very slow.It takes more than 5 - 10 mins to startup.It seems for long startup.Its installed on Windows 7 machine in c: drive. Want to know what is causing it to be too slow.virus scanning, JVM startup.... ?
FYI
---------
Oracle Sql developer Version -- 3.2.20.09
Java(TM) Platform -- 1.6.0_43
I just did a 112G file migration of production data using oracle_datapump so I know this works in principle. When I tried it on my test instance I am seeing stuff like this
[oracle@aggs00.test for_test]$ ls -l aggs_day_conversion_agg_2419
-rw-r----- 1 oracle oracle 15917056 Aug 10 09:06 aggs_day_conversion_agg_2419
CREATE TABLE IMP_3251198_2419(
PARTITION_DATE DATE,
USER_ID NUMBER,
SID NUMBER,
[code]....
Executed in 1800.642 seconds
why it could be taking 1800 seconds to select one record from a not very big table? File corruption? Disc fragmentation? Oracle instance configuration?
We have a MV which fetches data from around 27 tables containing 26 joins out of which 25 are outer joins. Some tables in the query are being referred multiple times through different alias names and hence the actual no of physical tables used is 18. This MV takes about 50 mins to refresh through complete refresh mechanism. We decided to make it fast refresh and thus made these configurations:
- Created MV logs based on rowid for each of the base tables.
- Recreated MV using FAST refresh,with primary key option enabled
- Pulled rowid for all these tables in the select column statement.
Even after making all the recommendations suggested by Oracle for fast refresh MV's we are still getting refresh time of around 65 mins(refresh time increased!!!).We already have indexes built on all the join columns of the base tables. What else do we need to do to make this a "fast" refresh MV ?
I have got an issue while uploading the raster data which are in .img format, the upload process is very slow.Previously it was done in 6-8 mins for 10 images but now it is of 30min and even 1 hour too..
View 20 Replies View Related