Adding a cloumn in a partitioned table having pctfree 0

Hi,
I have a partitioned fact table with millions of rows and pctfree 0. Now I want to add a new column in this table (without any default value in the new column, so new column is a null). How will it affect (because of pctfree 0) the performance of old data retrieval for reports.
Thanks,
Ravi

Alter Table <tab_name> add <column_name> datatype;
The column will added @ last
Edited by: LPS on Jul 13, 2011 11:16 PM

Similar Messages

Adding a cloumn in a fact table which has pctfree 0

Hi,
I have a partitioned fact table with millions of rows and pctfree 0. Now I want to add a new column in this table (without any default value in the new column, so new column is a null). How will it affect (because of pctfree 0) the performance of old data retrieval for reports.
Thanks,
Ravi

Hello,
If this is Berkeley DB what is the platform and version? If not this is not the
right forum. You might try the SQL and PL/SQL forum at:
PL/SQL
Thank you,
Sandra

Creating Local partitioned index on Range-Partitioned table.

Hi All,
Database Version: Oracle 8i
OS Platform: Solaris
I need to create Local-Partitioned index on a column in Range-Partitioned table having 8 million records, is there any way to perform it in fastest way.
I think we can use Nologging, Parallel, Unrecoverable options.
But while considering Undo and Redo also mainly time required to perform this activity....Which is the best method ?
Please guide me to perform it in fastest way and also online !!!
-Yasser

YasserRACDBA wrote:
3. CREATE INDEX CSB_CLIENT_CODE ON CS_BILLING (CLIENT_CODE) LOCAL
NOLOGGING PARALLEL (DEGREE 14) online;
4. Analyze the table with cascade option.
Do you think this is the only method to perform operation in fastest way? As table contain 8 million records and its production database.Yasser,
if all partitions should go to the same tablespace then you don't need to specify it for each partition.
In addition you could use the "COMPUTE STATISTICS" clause then you don't need to analyze, if you want to do it only because of the added index.
If you want to do it separately, then analyze only the index. Of course, if you want to analyze the table, too, your approach is fine.
So this is how the statement could look like:
CREATE INDEX CSB_CLIENT_CODE ON CS_BILLING (CLIENT_CODE) TABLESPACE CS_BILLING LOCAL NOLOGGING PARALLEL (DEGREE 14) ONLINE COMPUTE STATISTICS;
If this operation exceeds particular time window....can i kill the process?...What worst will happen if i kill this process?Killing an ONLINE operation is a bit of a mess... You're already quite on the edge (parallel, online, possibly compute statistics) with this statement. The ONLINE operation creates an IOT table to record the changes to the underlying table during the build operation. All these things need to be cleaned up if the operation fails or the process dies/gets killed. This cleanup is supposed to be performed by the SMON process if I remember correctly. I remember that I once ran into trouble in 8i after such an operation failed, may be I got even an ORA-00600 when I tried to access the table afterwards.
It's not unlikely that your 8.1.7.2 makes your worries with this kind of statement, so be prepared.
How much time it may take? (Just to be on safer side)The time it takes to scan the whole table (if the information can't read from another index), the sorting operation, plus writing the segment, plus any wait time due to concurrent DML / locks, plus the time to process the table that holds the changes that were done to the table while building the index.
You can try to run an EXPLAIN PLAN on your create index statement which will give you a cost indication if you're using the cost based optimizer.
Please suggest me if any other way exists to perform in fastest way.Since you will need to sort 8 million rows, if you have sufficient memory you could bump up the SORT_AREA_SIZE for your session temporarily to sort as much as possible in RAM.
-- Use e.g. 100000000 to allow a 100M SORT_AREA_SIZE
ALTER SESSION SET SORT_AREA_SIZE = <something_large>;
Regards,
Randolf
Oracle related stuff blog:
http://oracle-randolf.blogspot.com/
SQLTools++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676/
http://sourceforge.net/projects/sqlt-pp/

Replication For Partitioned Table

Well , I have a partitioned Table having partition on Date Field. Table Contains composite primary Key Date Field + Connection Id . Table Contains approx 30 Million Records.
Now when i m goin for replication setup , created materialized view on the basis of primary key , the fast refresh process takin time approx 3 hrs for refreshing 80,000 records on LAN environment.
Before partitioning this table the same refresh was taking only 20 Minutes.
can any body help me out to fasten up the refresh ?

What version of oracle are you using? What type of partitioning you are using on the table? Is the materialized view partitioned? What type of refresh mechanism are you using?(REFRESH FAST or REFRESH FORCE or REFRESH COMPLETE)? Is it ON DEMAND or ON COMMIT?

Truncating table having partitions

Hi,
I have a table haing 10 partitions and 5 subpartitions in each partition. Now i have to truncate that table. please let me know..
1) Can i truncate the table directly?
2) If no then how to truncate the table having partition->sub-partitions....
With Regards,
snp

Hello,
To count your rows on the Truncated Table, you may also execute the following query:
select count(*) from <Table_name>;You should be carefull if you ANALYZE or use DBMS_STATS on your Table just after you
Truncate it.
Because, as the Table is empty, the statistics of the optimizer may be wrong and, it could
affect the performance of your queries on this Table later (when it will be full).
So, you may have to refresh you statistics (with DBMS_STATS) after loading again this Table.
Hope this help.
Best regards,
Jean-Valentin

GATHER_TABLE_STATS on partitioned table

Hello All,
I am using Oracle 11g R2.
I am having a partitioned table, this table can have up to 30 partitions based on my retention policy and each partition is 1 day of data. each partition have like 3 millions records.
I am gathering the statistics of my current partition as below:
DBMS_STATS.GATHER_TABLE_STATS (SCHEMA_NAME, TABLE_NAME, PARTITION_NAME, ESTIMATE_PERCENT => DBMS_STATS.AUTO_SAMPLE_SIZE, METHOD_OPT=> 'FOR ALL COLUMNS SIZE AUTO');I noticed that when the table have 6 or 7 partitions the above gather statistics was taking like 20 mins. now I have 20 partitions on the table it is taking 45 minutes.
What is the reason ? should not be the same ? as I am gathering the statistics for only 1 partition ? and all partitions have the same number of records?
Regards,

What is the default ? granularity=>'ALL' or granularity=>'PARTITION' in the belowAUTO
GRANULARITY - The value determines granularity of statistics to collect (only pertinent if the table is partitioned).
'ALL' - gathers all (subpartition, partition, and global) statistics
'AUTO'- determines the granularity based on the partitioning type. This is the default value.
'DEFAULT' - gathers global and partition-level statistics. This option is obsolete, and while currently supported, it is included in the documentation for legacy reasons only. You should use the 'GLOBAL AND PARTITION' for this functionality. Note that the default value is now 'AUTO'.
'GLOBAL' - gathers global statistics
'GLOBAL AND PARTITION' - gathers the global and partition level statistics. No subpartition level statistics are gathered even if it is a composite partitioned object.
'PARTITION '- gathers partition-level statistics
'SUBPARTITION' - gathers subpartition-level statistics.
Regards
Girish Sharma
Edited by: Girish Sharma on Mar 11, 2013 7:39 PM
http://docs.oracle.com/cd/E11882_01/appdev.112/e25788/d_stats.htm#ARPLS059
Added doc link.

Error while creating partition table

Hi frnds i am getting error while i am trying to create a partition table using range
getting error ORA-00906: missing left parenthesis.I used the following statement to create partition table
CREATE TABLE SAMPLE_ORDERS
(ORDER_NUMBER NUMBER,
ORDER_DATE DATE,
CUST_NUM NUMBER,
TOTAL_PRICE NUMBER,
TOTAL_TAX NUMBER,
TOTAL_SHIPPING NUMBER)
PARTITION BY RANGE(ORDER_DATE)
PARTITION SO99Q1 VALUES LESS THAN TO_DATE(‘01-APR-1999’, ‘DD-MON-YYYY’),
PARTITION SO99Q2 VALUES LESS THAN TO_DATE(‘01-JUL-1999’, ‘DD-MON-YYYY’),
PARTITION SO99Q3 VALUES LESS THAN TO_DATE(‘01-OCT-1999’, ‘DD-MON-YYYY’),
PARTITION SO99Q4 VALUES LESS THAN TO_DATE(‘01-JAN-2000’, ‘DD-MON-YYYY’),
PARTITION SO00Q1 VALUES LESS THAN TO_DATE(‘01-APR-2000’, ‘DD-MON-YYYY’),
PARTITION SO00Q2 VALUES LESS THAN TO_DATE(‘01-JUL-2000’, ‘DD-MON-YYYY’),
PARTITION SO00Q3 VALUES LESS THAN TO_DATE(‘01-OCT-2000’, ‘DD-MON-YYYY’),
PARTITION SO00Q4 VALUES LESS THAN TO_DATE(‘01-JAN-2001’, ‘DD-MON-YYYY’)
;

More than one of them. Try this instead:
CREATE TABLE SAMPLE_ORDERS
(ORDER_NUMBER NUMBER,
ORDER_DATE DATE,
CUST_NUM NUMBER,
TOTAL_PRICE NUMBER,
TOTAL_TAX NUMBER,
TOTAL_SHIPPING NUMBER)
PARTITION BY RANGE(ORDER_DATE) (
PARTITION SO99Q1 VALUES LESS THAN (TO_DATE('01-APR-1999', 'DD-MON-YYYY')),
PARTITION SO99Q2 VALUES LESS THAN (TO_DATE('01-JUL-1999', 'DD-MON-YYYY')),
PARTITION SO99Q3 VALUES LESS THAN (TO_DATE('01-OCT-1999', 'DD-MON-YYYY')),
PARTITION SO99Q4 VALUES LESS THAN (TO_DATE('01-JAN-2000', 'DD-MON-YYYY')),
PARTITION SO00Q1 VALUES LESS THAN (TO_DATE('01-APR-2000', 'DD-MON-YYYY')),
PARTITION SO00Q2 VALUES LESS THAN (TO_DATE('01-JUL-2000', 'DD-MON-YYYY')),
PARTITION SO00Q3 VALUES LESS THAN (TO_DATE('01-OCT-2000', 'DD-MON-YYYY')),
PARTITION SO00Q4 VALUES LESS THAN (TO_DATE('01-JAN-2001', 'DD-MON-YYYY')))In the future, if you are having problems, go to Morgan's Library at www.psoug.org.
Find a working demo, copy it, then modify it for your purposes.

Insert statement does not insert all records from a partitioned table

Hi
I need to insert records in to a table from a partitioned table.I set up a job and to my surprise i found that the insert statement is not inserting all the records on the partitioned table.
for example when i am using select statement on to a partitioned table
it gives me 400 records but when i insert it gives me only 100 records.
can anyone help in this matter.

INSERT INTO TABLENAME(COLUMNS)
(SELECT *
FROM SCHEMA1.TABLENAME1
JOIN SCHEMA2.TABLENAME2a
ON CONDITION
JOIN SCHEMA2.TABLENAME2 b
ON CONDITION AND CONDITION
WHERE CONDITION
AND CONDITION
AND CONDITION
AND CONDITION
AND (CONDITION
HAVING SUM(COLUMN) > 0
GROUP BY COLUMNS

Performance issues with version enable partitioned tables?

Hi all,
Are there any known performance issues with version enable partitioned tables?
Ive been doing some performance testes with a large version enable partitioned table and it seems that OCB optimiser is choosing very expensive plans during merge operations.
Tanks in advance,
Vitor
Example:
     Object Name     Rows     Bytes     Cost     Object Node     In/Out     PStart     PStop
UPDATE STATEMENT Optimizer Mode=CHOOSE          1          249
UPDATE     SIG.SIG_QUA_IMG_LT
NESTED LOOPS SEMI          1     266     249
PARTITION RANGE ALL                                   1     9
TABLE ACCESS FULL     SIG.SIG_QUA_IMG_LT     1     259     2               1     9
VIEW     SYS.VW_NSO_1     1     7     247
NESTED LOOPS          1     739     247
NESTED LOOPS          1     677     247
NESTED LOOPS          1     412     246
NESTED LOOPS          1     114     244
INDEX RANGE SCAN     WMSYS.MODIFIED_TABLES_PK     1     62     2
INDEX RANGE SCAN     SIG.QIM_PK     1     52     243
TABLE ACCESS BY GLOBAL INDEX ROWID     SIG.SIG_QUA_IMG_LT     1     298     2               ROWID     ROW L
INDEX RANGE SCAN     SIG.SIG_QUA_IMG_PKI$     1          1
INDEX RANGE SCAN     WMSYS.WM$NEXTVER_TABLE_NV_INDX     1     265     1
INDEX UNIQUE SCAN     WMSYS.MODIFIED_TABLES_PK     1     62
/* Formatted on 2004/04/19 18:57 (Formatter Plus v4.8.0) */
UPDATE /*+ USE_NL(Z1) ROWID(Z1) */sig.sig_qua_img_lt z1
SET z1.nextver =
SYS.ltutil.subsversion
(z1.nextver,
SYS.ltutil.getcontainedverinrange (z1.nextver,
'SIG.SIG_QUA_IMG',
'NpCyPCX3dkOAHSuBMjGioQ==',
4574,
4575
4574
WHERE z1.ROWID IN (
(SELECT /*+ ORDERED USE_NL(T1) USE_NL(T2) USE_NL(J2) USE_NL(J3)
INDEX(T1 QIM_PK) INDEX(T2 SIG_QUA_IMG_PKI$)
INDEX(J2 WM$NEXTVER_TABLE_NV_INDX) INDEX(J3 MODIFIED_TABLES_PK) */
t2.ROWID
FROM (SELECT /*+ INDEX(WM$MODIFIED_TABLES MODIFIED_TABLES_PK) */
UNIQUE VERSION
FROM wmsys.wm$modified_tables
WHERE table_name = 'SIG.SIG_QUA_IMG'
AND workspace = 'NpCyPCX3dkOAHSuBMjGioQ=='
AND VERSION > 4574
AND VERSION <= 4575) j1,
sig.sig_qua_img_lt t1,
sig.sig_qua_img_lt t2,
wmsys.wm$nextver_table j2,
(SELECT /*+ INDEX(WM$MODIFIED_TABLES MODIFIED_TABLES_PK) */
UNIQUE VERSION
FROM wmsys.wm$modified_tables
WHERE table_name = 'SIG.SIG_QUA_IMG'
AND workspace = 'NpCyPCX3dkOAHSuBMjGioQ=='
AND VERSION > 4574
AND VERSION <= 4575) j3
WHERE t1.VERSION = j1.VERSION
AND t1.ima_id = t2.ima_id
AND t1.qim_inf_esq_x_tile = t2.qim_inf_esq_x_tile
AND t1.qim_inf_esq_y_tile = t2.qim_inf_esq_y_tile
AND t2.nextver != '-1'
AND t2.nextver = j2.next_vers
AND j2.VERSION = j3.VERSION))

Hello Vitor,
There are currently no known issues with version enabled tables that are partitioned. The merge operation may need to access all of the partitions of a table depending on the data that needs to be moved/copied from the child to the parent. This is the reason for the 'Partition Range All' step in the plan that you provided. The majority of the remaining steps are due to the hints that have been added, since this plan has provided the best performance for us in the past for this particular statement. If this is not the case for you, and you feel that another plan would yield better performance, then please let me know and I will take a look at it.
One suggestion would be to make sure that the table was been recently analyzed so that the optimizer has the most current data about the table.
Performance issues are very hard to fix without a reproducible test case, so it may be advisable to file a TAR if you continue to have significant performance issues with the mergeWorkspace operation.
Thank You,
Ben

How to find out the Non Partitioned Tables used 2Gb on oracle

Hi team
how to find out the Non Partitioned Tables used > 2Gb on oracle where not is sys & system
regards

heres 1 I made earlier
set pagesize 999
set linesize 132
col owner format a25
col segment_name format a60
select owner,segment_name,segment_type,(bytes/1024/1024)"MB size"
from dba_segments
where owner not in ('SYS','SYSTEM','XDB','MDSYS','SYSMAN') -- edit for taste
and segment_type = 'TABLE'
having (bytes/1024/1024) > 2000
group by bytes, segment_Type, segment_name, owner
order by 4 asc

"Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, windows can only be installed to GPT disks." Error

Hey Im getting the following error when trying to install windows from a USB.
"Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, windows can only be installed to GPT disks."
I installed the windows 8 (64bit) iso using boot camp to a usb. I was able to do this after changing the info.plist to allow me to place the iso on the usb. After I make the partition and start the install, I get the above error. I formatted the partition in the installation but I keep getting this error. I've repreated the entire process but i keep getting this errror and the disk utility says my partition is a Windows NT File System (NTFS) so im not sure what's going on. If you can help me that would be greatly appreciated

I am having the same problem. Windows is trying to install. It identifies the various partitions but says that I cannot install Windows on the Boot Camp partition or any other. I select Drive options (advanced) and Format the Boot Camp drive, but it makes no difference.
This is the Windows error:
Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks.
Windows cannot be installed to this disk. This computer's hardware may not support booting to this disk. Ensure that the disk's controller is enabled in the computer BIOS menu.
I am not sure what Csound1 is suggesting with that post above. There are some involved suggestions over here <https://discussions.apple.com/message/23548999#23548999> about using Disk Utility to delete the Boot Camp partition and create new ones - is that the idea?

No more optical drive and windows 8 issue: "Windows cannot be installed on this disk as it has an MBR partition table."

I have an Early 2011 13" MBP going strong with an SSD and original HDD installed in the optical drive. However, having had success with windows 7 on my old HDD I was planning to install Windows 8.1 (from .iso) on my SSD. However, for the past day or so it's been a nightmare.
I tried the official procedure but by editing the bootcamp info.plist so I could boot from USB (you can't install windows from an external optical drive apparently) partitioning as bootcamp wanted too.
I then tried it a number of different ways using disk utility etc and with an empty space
However, I always seem to end up with the error "“Windows cannot be installed on this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only installed on GPT disks“
I read some interesting stuff here http://www.royhochstenbach.com/installing-windows-8-1-on-a-2013-mac-pro/
He points out that
"Windows 7 and 8 in x64 support EFI. Normally if you install Windows on a Mac and use the installation DVD, it boots into regular BIOS mode, thus can be installed on an MBR partition. I tried the same, but since the Mac Pro doesn’t have an optical drive I had to use an external drive. And apparently the Mac boots external optical drives in EFI mode too. The Bootcamp wizard is aware of this, and creates a GPT partition on a non-superdrive Mac but an MBR partition on a superdrive Mac."
This means Bootcamp is essentially making the wrong type of partition?
My real question is? How do I install it windows 8? I'm really on my last legs!
I really don't want to have to open this thing up and reinsert my optical drive as its really really difficult to get out of the enclosure (would probably have to break it).
A huge thanks in advance!

Hi,
Have you tried that suggestion?
You also could use this commands to check and install again:
Inside windows installer, hit Shift+F10 to get a command prompt, then run diskpart and type List disk to displays a list of disks and information about them, such as their size, amount of available free space, whether the disk is a basic or dynamic disk,
and whether the disk uses the master boot record (MBR) or GUID partition table (GPT) partition style.
and then select the target disk. Zap the drive (with the clean command), create GPT table (new gpt), create the GPT-EFI special partitions.
Step-by-step instructions is here for reference:
HOW TO: Use the Diskpart.efi Utility to Create a GUID Partition Table Partition on a Raw Disk in Windows
http://support.microsoft.com/kb/297800?wa=wsignin1.0
Then reboot so the firmware finds those partitions and adds the disk to the EFI-native boot order (Windows installer checks this).
Karen Hu
TechNet Community Support

Mid 2010 iMac upgraded SSD, can't seem to install windows via bootcamp. Windows can't be installed on this storage device. The chosen harddisk contains a MBR-partition-table. Windows can only be installed on GPT-harddisks on EFI-systems error

I have windows 8.1 on DVD & on USB CF Reader/Card. I've followed the full steps in bootcamp, but when it restarts and its time to select the bootcamp partition to install windows (after alt rebooting to the efi startup) I get the "Windows can't be installed on this storage device. The chosen harddisk contains a MBR-partition-table. Windows can only be installed on GPT-harddisks on EFI-systems" error.
I've scoured the internet trying different solutions that seem to work for everyone else, but to no avail. I've reformatted from that screen, doesn't help. I've removed bootcamp partition and manually partitioned using disk util, leaving it empty once partition-wise, and filling it with a blank partition the second time. I've done a full back up and clean re-install of Yosemite, and nothing seems to be working.
Thats when I switched to DVD install, as I heard sometimes you can't install with a CF card. When I alt-boot, I can see EFI-windows and windows, but if I select EFI-windows, same problem as before, and if I select windows, I get the black screen of "no bootable device please insert boot disk and press any key."
I've been stuck w/o bootcamp for over 2 years now. Anyone, please help?
Mid 2010 iMac running 256gb SSD, Yosemite 10.10.1 trying to install windows 8.1

I am having the same problem. Windows is trying to install. It identifies the various partitions but says that I cannot install Windows on the Boot Camp partition or any other. I select Drive options (advanced) and Format the Boot Camp drive, but it makes no difference.
This is the Windows error:
Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks.
Windows cannot be installed to this disk. This computer's hardware may not support booting to this disk. Ensure that the disk's controller is enabled in the computer BIOS menu.
I am not sure what Csound1 is suggesting with that post above. There are some involved suggestions over here <https://discussions.apple.com/message/23548999#23548999> about using Disk Utility to delete the Boot Camp partition and create new ones - is that the idea?

Adding field in Maintenance view of table

Hi,
I am trying to create a custom maintanable table. Now the requirement is I need to add one more extra field in the maintenace view of the table which should not be in the table fields and is for display only in the maintencae view.
I tried adding a cloumn by editing the screen program generated by the table maintenance generator. I get the the display in the maintenance view of that extra field. But I dont get the values populated.
Can you please let me know in which PBO or PAI i should write the module programe ..
Help will be rewarded with points.

Hello Bluesh
Normally the extra field should be from a table that has a foreign-key relationship to your main table. Thus, add this additional table to the list of tables for the view. If it does not have a suitable relationship you cannot add it to the list of tables.
Afterwards add the required field to the list of view fields and set its property to 'R' = read-only.
If correctly defined there is no need at all to modify the screen(s) or the coding of the PBO/PAI modules.
Example: your z-table contains field KUNNR (value table KNA1) and you want to add the NAME1 field to your maintenance view
add table KNA1 to the list of tables
add field NAME1 to view fields
set its property to 'R'
regenerate function modules and screens
Regards
Uwe

Best practice for replicating Partitioned table

Hi SQL Gurus,
Requesting your help on the design consideration for replicating a partitioned table.
1. 4 Partitioned tables (1 master table with foreign key constraints to 3 tables) partitioned based on monthly YYYYMM
2. 1 table has a XML column in it
3. Monthly switch partition to remove old data, since it is having foreign key constraint; disable until the switch is complete
4. 1 month partitioned data is 60 GB
having said the above, wanted to create a copy of the same tables to a different servers.
I can think of
1. Transactional replication, but then worried about the XML column,snapshot size and the alter switch will make the same thing
on the subscriber or row by row delete.
2. Logshipping with standby with every 15 minutes, but then it will be for the entire database; because I have other partitioned monthly table which is of 250 GB worth.
3. Thinking about replicating the Partitioned table as Non Partitioned, in that case how the alter switch will work. Is it possible to ignore delete when setting up the replication.
3. SSIS or Stored procedure method of moving data on a daily basis.
4. Backup and restore on a daily basis, but this will not work when the source partition is removed.
Ganesh

Plz refer to
http://msdn.microsoft.com/en-us/library/cc280940.aspx

Adding a cloumn in a partitioned table having pctfree 0

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