Partitioning and Clustering of Table
I just inherited a table with 10 million discs. Data can be grouped against a key, every key with usually around 10-200 lines.Given against this key gets dragged over a large period of time. The separate keys in this table at present are ~.7 million.
All our access to this table is based on this key. As you can image data are scattered in several blocks, so there is considerable I/O and it takes a long time for all queries to run. Ours can be described as instance Reporting however inserts and updates this table up-to-date produce 24/7 and access to the system is 24/7.
My question is threefold
Should I create a cluster from the unique table on that table with my key as the cluster column?
Partitioning coexist with clusters?
Other strategies exist to optimize in this case?
Thanks in advance
Daniel
If each key corresponds to 10-200 lines, however, and it is a regular b-tree on the key index, the fact that there are millions of rows in the table should be (mostly) not relevant - Oracle will get 10-200 ROWID of the index and 10-200 one-piece extractions. This should be pretty quick, so I'd be interested in why you think that this distribution is causing significant delays in reporting instance.
Are you a license for partitioning (it's an extra cost option on top of your enterprise edition license)? If you are partitioning table would seem reasonable. A cluster of the unique table or a table in index also seems to be reasonable. Cluster table, however, will slow down inserts and updates. However, you cannot partition a table cluster.
Justin
Tags: Database
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issue with tables and clusters
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Conversion table of Partition Non-Partition and vice versa
Hello
I followed the method of Partition to Partition and vice versa conversion table below. Please suggest is here
any other altrnative methods available to accomplish the same thing.
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import data into the same table, now, the data is organized with Partitions.
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Collection of statistics on partitioned and non-partitioned tables
Hi all
My DB is 11.1
I find that the collection of statistics on partitioned tables are really slow.
I used the following script:TABLE_NAME NUM_ROWS BLOCKS SAMPLE_SIZE LAST_ANALYZED PARTITIONED COMPRESSION ------------------------------ ---------- ---------- ----------- ------------- ----------- ----------- O_FCT_BP1 112123170 843140 11212317 8/30/2011 3:5 NO DISABLED LEON_123456 112096060 521984 11209606 8/30/2011 4:2 NO ENABLED O_FCT 115170000 486556 115170 8/29/2011 6:3 YES SQL> SELECT COUNT(*) FROM user_tab_subpartitions 2 WHERE table_name =O_FCT' 3 ; COUNT(*) ---------- 112
It costs 2 minutes for the first two tables to gather statistics respectively, but more than 10 minutes for the partitioned table.BEGIN DBMS_STATS.GATHER_TABLE_STATS(ownname => user, tabname => O_FCT', method_opt => 'for all columns size auto', degree => 4, estimate_percent =>10, granularity => 'ALL', cascade => false); END; /
Time of collection of statistics represents a large part of the time of the whole lot.
Most of the work of the lot are at full load, which case all partitions and subpartitions will be affected and we cannot collect just specified partitions.
Does anyone have experiences on this subject? Thank you very much.
Best regards
Leon
Published by: user12064076 on August 30, 2011 01:45Hi Leon
Why don't collect you statistics to the partition level? If your data partitions will not change after a day (score range date for ex), you can simply do to the partition level
GRANULARITY-online 'SCORE' for partition level and
GRANULARITY-online 'SUBPARTITION' for subpartition levelYou collect global stats whenever you can not require.
Published by: user12035575 on August 30, 2011 01:50
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Can we have hash partition and list on 2 columns in the same table. How.
Can we have hash partition and list on 2 columns in the same table. How.
Work on 10g release 2# List-Hash is a valid composite partitioning strategy 11 from g.
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I have a MacBook Pro (retina, 15 inches, end of 2013), 2 GHz Intel Core i7 with 8 GB of Ram.
I had 2 system installed, Win 10 + Yosemite from the windows of beginning and the use of most of the time.
Yesterday, I ran out of disk space and passed the partition in OS X with disk utility.
While I changed the partition and I also upgraded to the El Cap.
After all, I can't start by winning 10 more, although I could see my windows in the startup disk Control Panel.
I checked some thread here and mess with command autour terminal, but nothing has worked for me.
Here is the result of diskutil:
Jerbins-MacBook-Pro: ~ the jerbinyuan list $ diskutil
/ dev/disk0 (internal, physical):
#: NAME SIZE TYPE IDENTIFIER
0: GUID_partition_scheme * GB 251,0 disk0
1: disk0s1 EFI EFI 209.7 MB
2: Apple_HFS Macintosh HD 70.1 GB disk0s2
3: disk0s3 Apple_Boot Recovery 650.0 MB HD
4: Microsoft data base BART 30.0 GB disk0s4
5: Microsoft database HOMER 150,0 GB disk0s5
Jerbins-MacBook-Pro: ~ list of cs jerbinyuan$ diskutil
No logical volume group CoreStorage found
Jerbins-MacBook-Pro: ~ jerbinyuan$ sudo TPG - vv - r show/dev/disk0
Password:
See the TPG: / dev/disk0: mediasize = 251000193024; SectorSize = 512; blocks = 490234752
See the TPG: / dev/disk0: MBR suspicious to sector 0
See the TPG: / dev/disk0: Pri GPT to sector 1
See the TPG: / dev/disk0: GPT Sec at sector 490234751
start index size summary
0 1 MBR
1 1 Pri GPT header
2 32 table GPT Pri
34 6
40 409600 1 part TPG - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 136992184 2 part TPG - 48465300-0000-11AA-AA11-00306543ECAC
137401824 1269536 3 part TPG - 426F6F74-0000-11AA-AA11-00306543ECAC
768 138671360
138672128 58595328 4 part TPG - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
197267456 292966400 5 part TPG - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
490233856 863
490234719 32 table dry GPT
490234751 1 dry GPT header
Jerbins-MacBook-Pro: ~ jerbinyuan$ sudo fdisk/dev/disk0
Disk: geometry / dev/disk0: 30515/255/63 [490234752 sectors]
Signature: 0xAA55
From end
#: cyl hd s - cyl hd s id [Start - size]
------------------------------------------------------------------------
1: EA 1023 254 63 - 1023 254 63 [1-409639] < unknown ID >
2: AF 1023 254 63 - 1023 254 63 [409640-136992184] HFS +.
3: AB 1023 254 63 - 1023 254 63 Boot Darwin [137401824-1269536]
4: 0 b 1023 254 63-1023 254 63 [138672128-58595328] Win95 FAT-32
Jerbins-MacBook-Pro: ~ jerbinyuan$ sudo dd if = / dev/rdisk0s4 account = 1 2 >/dev/null | hexdump - C
00000000 2nd eb 58 90 42 53 44 20 20 34 34 00 02 20 20 00 | X.BSD 4.4... .|
00000010 02 00 00 00 00 00 00 20 00 f8 ff 00 00 f8 43 08 |... C. |
18 00 00000020 7th e0 03 37 00 00 00 00 00 00 02 00 00 00 |... ~... 7..........|
00000030 01 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |... |
00000040 80 00 29 11 14 2f 2 a 42 41 52 54 20 20 20 20 20 |..) ... / * BART |
00000050 20 20 46 41 54 33 32 20 20 20 31 c0 d0 bc 8F fa | FAT32. 1... |
00000060 00 7 c fb 8th d8 e8 00 00 83 19 bb 07 00 fc 5th c6 | | ......^.......|
00000070 c0 ac 84 74 b4 06 0e cd 10 eb 30 cd 16 cd e4 f5 |... t... 0....|
00000080 19 0D 0a 4th 6f 6F 2d 73 79 73 74 65 6 d 20 64 69 |... Nonsystem di |
00000090 73 6B 0D 0 a 50 72 65 73 73 20 61 79 20 6 6 b 65 | SK... Press any ke |
000000a 0 79 20 74 6f 20 72 65 62 6f 6f 74 0D 0 a 00 00 00 | is reboot... |
000000b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |... |
*
000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |... U. |
00000200
Jerbins-MacBook-Pro: ~ jerbinyuan$ diskutil info/dev/disk0s5
Identifier of the instrument: disk0s5
Device node: / dev/disk0s5
Set: No.
Part of the whole: disk0
Device / media name: BOOTCAMP
Volume name: HOMER
Gendarmerie: Yes
Mount point: / Volumes/HOMER
Personality of file system: NTFS
Type (Bundle): ntfs
Name (Visible to the user): Windows NT (NTFS) file system
Partition type: Microsoft Basic Data
Operating system can be installed: No.
Media type: generic
Protocol: PCI
Smart: checked
Volume UUID: 4EC75B8E-02A8-4B26-B7F3-5EA9D0A47FA9
Disk / Partition UUID: 776C43C1-7E4C-4997-BDF5-A91FD406DEBD
Total size: 150.0 GB (149998796800 Bytes) (exactly 292966400 512-Byte-units)
Amount of free space: 18.5 GB (18479718400 Bytes) (exactly 36093200 512-Byte-units)
Device block size: 512 bytes
Allocation block size: 4096 bytes
Support read-only: No.
Volume read-only: Yes
Location of the device: internal
Removable media: no
Solid State: Yes
Thanks for help.
Please follow the steps described in [help] can not boot Windows (8.1) after partition resizing .
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Missing Mac 8.1 Windows partition and Bootcamp
So, I have seen very similar messages and followed several forums, but I can't yet figure out what to do next.
I have 8.1 Windows on my Mac. I wanted to repartition the Windows partition and make bigger it because I was running low on space, and the Windows partition is what I use it mostly for graduate studies. About a year ago, I took an easy youtube video and used Mini Wizard Partition re-partition space and it worked perfectly. I have found the same video and tried to repartition the Windows partition again, but apparently I royally screwed up.
My BootCamp is not yet visible more in disk utility. Under the partitions, there is an option called "disk0s4" greyed, but I'm not allowed to do something with it. I can't verify or repair. If I go to Applications, BootCamp Assistant is there, but he wants me to start the installation of BootCamp. It was not an option to restart Windows more, and when I turned on with alt + market, Windows was not an option more.
I followed this tutorial:
http://nerdr.com/bootcamp-partition-lost-repairing-Mac-partitions/
and when I restarted my Mac, restart Windows was an option. So I thought that I fixed it! EVIL. My screen was black and said: 'Missing Operating System '.
I downloaded EaseUS Data Recovery Wizard for Mac (because it was another suggestion), and I was able to recover and see the files on the NTFS disk0s4, so I'm quite positive, they have not all been completely erased. Or at least the part of basic Windows is still there. I can't recover the drive to anything, because it tells me that I will just be fitness on the same drive, and I honestly don't know how to retrieve these files will help with the side of the partition of things.
I also used TestDisk and it seemed to find my missing partition, but in the middle of analysing it, it says something like "disk too small." After further research, I went through and took only the most recent score that seemed to be deleted with NTFS, and when you are trying to do, it would allow me to make a 'logic' partition because he said something in red, as 'bad file.'
My Mac still works perfectly, but I'm terribly need to recover my windows. All suggestions are useful! Thank you!
Last login: Wed Mar 9 16:30:28 on ttys001
Anna-Owenss-MacBook-Pro: ~ acowens1$ sudo gdisk/dev/rdisk0; "exit";
GPT fdisk (gdisk) version 1.0.1
WARNING: Open with shared lock devices will not have their
table partition automatically reloaded!
Scanning partition table:
MBR: hybrid
BSD: absent
APM: absent
TPG: present
Found a valid GPT with hybrid MBR; using GPT.
Command (? for help): p
Disk/dev/rdisk0: 625142448 sectors, GiB 298,1
Logical sector size: 512 bytes
Identifier (GUID) of disc: 0000429B-368F-0000-CB2D-000003440000
Partition table contains up to 128 entries
First usable sector is 34, last usable area is 625142414
The partitions will be aligned with the boundaries of sector 8
Space free total is 277435021 areas (132,3 GiB)
Starting number (sector) end (sector), Code name of size
409639 40 1 200.0 MiB EF00 EFI system partition
2 409640 268314855 127.7 giB customer AF00
3 268314856 269584391 619.9 MiB AB00 Recovery HD
4 547018752 625141759 37.3 giB 0700 BOOTCAMP
Command (? for help): r
Recovery/processing command (? for help): o
Size of the disk is 625142448 areas (298,1 GiB)
MBR disk identifier: 0x0000711C
MBR partitions:
Code of State sector Boot start end sector number
1 1 547018751 primary 0xEE
2 * 547018752 625141759 0 x 07 elementary school
Recovery/processing command (? for help): h
CAVEAT! Hybrid MBRs are flaky and dangerous! If you decide to not use one,
Simply press enter at the prompt below and your partition table MBR will be
be intact.
Type one to three GPT partition numbers, separated by spaces, to be
added to the hybrid MBR, in order: 2 3 4
Partition of EFI GPT (0xEE) place first in the MBR (good for GRUB)? (Y/N): y
Create entry for the #2 GPT partition (partition MBR #2)
Enter a hex code MBR (default AF): n
Set the bootable flag? (Y/N): n
Create entry for the #3 GPT partition (partition MBR #3)
Enter a hex code MBR (default AB):
Set the bootable flag? (Y/N): n
Create entry for the #4 GPT partition (partition MBR #4)
Enter a hex code MBR (default 07):
Set the bootable flag? (Y/N): y
Recovery/processing command (? for help): o
Size of the disk is 625142448 areas (298,1 GiB)
MBR disk identifier: 0x0000711C
MBR partitions:
Code of State sector Boot start end sector number
1 1 409639 primary 0xEE
2 409640 268314855 primary 0 x 01
3 268314856 269584391 primary 0xAB
4 * 547018752 625141759 0 x 07 elementary school
Recovery/processing command (? for help):
I followed the suggestions of the post, but I was not allowed to use the option of 3 4 5 or rather 2 3 4 type, because #5 has been "too big or did not exist." I'm at the point where I should be typing w (write) but I won't enter this command if it is not correct.
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Size of the partition and Index Local
Hi all
Database information: 11.2.0.3 64-bit Linux. It is a 3 RAC Cluster node.
I recently partitioned a Parent and child tables as PARTITION of REFERENCE set. The parent table has been RANGE - partitioned. The first partition is on an integer column and the beaches are 0-1000, 10001-2000, 20001-30000 and so on. The secondary partition is on a date and it is partitioned for each quarter.
I created a local index as follows (faullt2vehicle, offboard_load_date, record_type, Column_Y).
Here's an example query I will carry out, where the date is covering 2 secondary partitions
select * from gets_tool_Fault t where fault2vehicle = 12195 and offboard_load_date BETWEEN TO_DATE('2015-04-01 00:00:00', 'yyyy-mm-dd hh24:mi:ss') AND TO_DATE('2015-07-01 00:00:00', 'yyyy-mm-dd hh24:mi:ss') AND record_type IN('FLT','STP','HC','EGU','EOAEQP','CEL')
When I generate the plan explain below is the output
Plan hash value: 2702285198 -------------------------------------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Pstart| Pstop | -------------------------------------------------------------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 386 | 76428 | 244 (0)| 00:00:03 | | | | 1 | PARTITION RANGE SINGLE | | 386 | 76428 | 244 (0)| 00:00:03 | 2 | 2 | | 2 | PARTITION RANGE ITERATOR | | 386 | 76428 | 244 (0)| 00:00:03 | 7 | 8 | | 3 | TABLE ACCESS BY LOCAL INDEX ROWID| GETS_TOOL_FAULT | 386 | 76428 | 244 (0)| 00:00:03 | 10 | 18 | |* 4 | INDEX RANGE SCAN | GETS_TOOL_FAULT_C7 | 386 | | 7 (0)| 00:00:01 | 10 | 18 | -------------------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- 4 - access("FAULT2VEHICLE"=12195 AND "OFFBOARD_LOAD_DATE">=TO_DATE(' 2015-04-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND "OFFBOARD_LOAD_DATE"<=TO_DATE(' 2015-07-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) filter("RECORD_TYPE"='CEL' OR "RECORD_TYPE"='EGU' OR "RECORD_TYPE"='EOAEQP' OR "RECORD_TYPE"='FLT' OR "RECORD_TYPE"='HC' OR "RECORD_TYPE"='STP')
If you observe the optimizer is currently to identify the partition, and then the secondary partition, but what is confusing to me, this is why the restricted PREMISES index scan scans all secondary partitions for a given partition. The partition should be not even as a value from PARTITION RANGE ITERATOR of 7 and 8.
Interestingly, when I provide a date range which is in single partition the pruning is happening correctly Plan hash value: 3457799067 -------------------------------------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Pstart| Pstop | -------------------------------------------------------------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 1 | 197 | 4 (0)| 00:00:01 | | | | 1 | PARTITION RANGE SINGLE | | 1 | 197 | 4 (0)| 00:00:01 | 2 | 2 | | 2 | PARTITION RANGE SINGLE | | 1 | 197 | 4 (0)| 00:00:01 | 7 | 7 | |* 3 | TABLE ACCESS BY LOCAL INDEX ROWID| GETS_TOOL_FAULT | 1 | 197 | 4 (0)| 00:00:01 | 16 | 16 | |* 4 | INDEX RANGE SCAN | GETS_TOOL_FAULT_N1 | 1 | | 3 (0)| 00:00:01 | 16 | 16 | -------------------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- 3 - filter("RECORD_TYPE"='CEL' OR "RECORD_TYPE"='EGU' OR "RECORD_TYPE"='EOAEQP' OR "RECORD_TYPE"='FLT' OR "RECORD_TYPE"='HC' OR "RECORD_TYPE"='STP') 4 - access("FAULT2VEHICLE"=12195 AND "OFFBOARD_LOAD_DATE">=TO_DATE(' 2015-04-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND "OFFBOARD_LOAD_DATE"<=TO_DATE(' 2015-06-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
Thank you
Jayadeep
1. your index (faullt2vehicle, offboard_load_date, record_type, Column_Y), your query has a predicate based on a beach on the second column in this index, which means that the order of the index that must be examined is dictated by this predicate and each row in the range must be considered (filtered) to check the third predicate. Basic guideline on the column in the index you are ordering for more effective use: If you have columns where predicates are always equal put these columns at the beginning of the index, the columns where predicates are usually based on a beach go towards the end. You seem to have been misled by reviews 'the prefix local index' stick to your two columns of partitioning at the front of your index - which should NOT be an automatic choice for the local index: see this note ( https://jonathanlewis.wordpress.com/2011/02/28/prefixed/ ) comments that follow and OTN article it is linked to.
2 since you have two indexes that start the same way (this goes with the local prefix again) you made easy for the optimizer to choose the index (for you) is clearly evil. That's why behind the choice of the optimizer is probably another example of an issue that I spoke a few days ago: Re: Composite index + map selection N1 your index is probably greater than the index of C7, and the order of the entries in the C7 index probably makes the data much more dispersed that it really is (i.e. high clustering_factor).
Concerning
Jonathan Lewis
PS (update):
If there are many rows for each fault_id, then you must create an index from fault_id with 'compress 1' (or compress N if the first columns of the index N are repetitive).
When dealing with range partitions do not forget that the high value partition is never reached in the document, do so based in the form "date_col BETWEEN date1 and date2", use the form "date_col > = dateX and date_col»< datey"="" or="" you="" may="" find="" that="" you="" are="" accessing="" one="" more="" partition="" than="" you="" hope="" to,="" and="" in="" some="" cases="" that="" may="" mean="" "multiple"="" (i.e.="" 2)="" when="" you="" were="" expecting="" 1="" (and="" the="" optimizer="" is="" much="" better="" at="" estimating="" costs="" for="" a="" single="">
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Partitioning of an existing Table using the EXCHANGE PARTITION
Hi all
I have one unpartitioned table I partitioned by Exchange, this table has several indexes and constraints (primary and foreign).
ALTER TABLE notpart_table ADD ( CONSTRAINT PK_KCESPITI PRIMARY KEY (K_CESP, TIPORD) USING INDEX TABLESPACE TBLS_CONTA, CONSTRAINT FK_KCONTO_CE FOREIGN KEY (K_CONTO) REFERENCES xxxx (K_CONTO)); CREATE INDEX IX_NFATTURA_CE ON notpart_tab (ANNO_FATTURA, K_REGISTRO, K_REGFA, TIPORD) TABLESPACE TBLS_CONTA;
after Create a partitioned Table Destination
notpart_table2, I created the same constraints and indexes defined in notpart_table
When I run
ALTER TABLE notpart_table2 EXCHANGE PARTITION PART_notpart_table2 WITH TABLE notpart_table WITHOUT VALIDATION UPDATE GLOBAL INDEXES;
I get: ora-02266
Why?
Thanks in advance for any help
Post edited by: vigilant Rosario
It is not exactly what you have. Very probably not partitioned table, you are partitioning is the parent to another table table:
SQL > create table tbl1 (id number)
2.Table created.
SQL > alter table tbl1
2 Add the constraint tbl1_pk
3 primary key
4.Modified table.
SQL > create table tbl2 (id number)
2.Table created.
SQL > alter table tbl2
2 Add the constraint tbl1_fk1
3 foreign key
4 references tbl1
5.Modified table.
SQL > insert into tbl1 values (1)
2.1 line of creation.
SQL > insert into tbl2 values (1)
2.1 line of creation.
SQL > create table tbl1_part (id number)
2 partition by range (id)
3 (partition p1 values less than (1000000))
4.Table created.
SQL >
SQL > alter table tbl1_part
Exchange 2 partition p1
3 with table tbl1
4 without validation
5 update global indexes
6.
with table tbl1
*
ERROR at line 3:
ORA-02266: permit to unique/primary keys in table referenced by foreign keysSQL >
If so, of the foreign key and recreate it pointing to the partitioned table as parent after finished partitioning the table.
SY.
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Find the right Partition for swap Partiton when there are PARTITION and SUBPARTITION
Hi all
I have a small problem:
I want to find the right cause of partitions of the partition key. I have a partition and a Subpartition (sample - table in annex).
I leave the database to generate the partition (and name), the name is generated. I need to find for the exchange of partition
the right of Partition has cause of a given value of the partition key (in this case EVOD_PART_DATE and 20141101 value).
When I try to find the right partiton name, I would use generally not:
SELECT DISTINCT dbms_rowid.rowid_object(ROWID) data_object_id FROM F_CONTRACT_EVENT WHERE EVOD_PART_DATE = TO_DATE ('20141101','YYYYMMDD')
Okay, I get 2 rows, I'm expecting one, but cause the result are the subpartions, I get this:
SELECT * FROM ALL_OBJECTS WHERE DATA_OBJECT_ID IN ( 155159,155154);
I see:
EVO_DM F_CONTRACT_EVENT SYS_SUBP4292 155159 155159 TABLE SUBPARTITION EVO_DM F_CONTRACT_EVENT SYS_SUBP4287 155154 155154 TABLE SUBPARTITION
But I don't want the subparts, I want the PARTITON!
The table:
CREATE TABLE "EVO_DM"."A0_F_CONTRACT_EVENT" ( "EVOD_DDATE_ID_VALID_FROM" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DDATE_ID_VALID_TO" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DTIME_ID_START" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DSUST_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DCHAN_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DARTI_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DCAMP_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DUSAG_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DOPSY_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DDEVI_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DSHOP_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DPLFO_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DACCO_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DDECL_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DOBJT_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DOFFR_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DCNTR_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DCURR_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DCONT_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DIVWC_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "DD_SUBSCRIPTION_ID" VARCHAR2(50 BYTE) DEFAULT '~' NOT NULL ENABLE, "SINGLE_ISSUE" NUMBER(8,0) DEFAULT 0, "SUBSCRIPTION" NUMBER(8,0) DEFAULT 0, "RENEWAL" NUMBER(8,0) DEFAULT 0, "CONVERSION" NUMBER(8,0) DEFAULT 0, "DOWNLOAD" NUMBER(8,0) DEFAULT 0, "UPDATES" NUMBER(8,0) DEFAULT 0, "NET_VALUE_IN_EUR" NUMBER(10,4) DEFAULT 0 NOT NULL ENABLE, "GROSS_VALUE_IN_EUR" NUMBER(10,4) DEFAULT 0 NOT NULL ENABLE, "COMMISSION_IN_EUR" NUMBER(10,4) DEFAULT 0 NOT NULL ENABLE, "TAX_IN_EUR" NUMBER(10,4) DEFAULT 0 NOT NULL ENABLE, "POSITION_NR" NUMBER(3,0) DEFAULT -1, "DD_ORDER_NR" VARCHAR2(50 BYTE) DEFAULT '~' NOT NULL ENABLE, "EVOD_SOURCE_CD" VARCHAR2(50 BYTE) DEFAULT '~' NOT NULL ENABLE, "FLAG_STOCK_RELEVANT" NUMBER(1,0) DEFAULT '0' NOT NULL ENABLE, "RENEWAL_NR" NUMBER(3,0) DEFAULT -1, "EVOD_DDATE_ID_SUBSCRIPTION" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, "EVOD_DPRCG_ID" NUMBER(20,0) DEFAULT -1 NOT NULL ENABLE, EVOD_PART_DATE DATE GENERATED ALWAYS AS ( TRUNC(TO_DATE(TO_CHAR(EVOD_DDATE_ID_VALID_FROM),'YYYYMMDD'),'MM')) VIRTUAL) PARTITION BY RANGE(EVOD_PART_DATE) interval(NUMTOYMINTERVAL (1,'MONTH')) SUBPARTITION BY LIST(EVOD_SOURCE_CD) SUBPARTITION TEMPLATE( SUBPARTITION "P_ITUNES" VALUES ('ITUNES') , SUBPARTITION "P_WSP" VALUES ('WSP'), SUBPARTITION "P_GOOGLE" VALUES ('PLAYSTORE'), SUBPARTITION "P_DEFAULT" VALUES ('~') , SUBPARTITION "P_AMAZON" VALUES ('AMAZON_EREADER', 'AMAZON_MANUELL', 'AMAZON_TABLET') , SUBPARTITION "P_MSD" VALUES ('MSD') ) ( PARTITION P01 VALUES LESS THAN (TO_DATE('200310','YYYYMM')) SEGMENT CREATION DEFERRED ) PARALLEL 10 ;
Any ideas?
Thanks for Berlin
First of all - the DOF you posted is INVALID - you do not specify a delayed segment creation for partitions. Specify you for the table.
Also, you must remove the DEFAULT value - 1 for the partitioning column. The value '-1' cannot be converted to a valid date for the virtual partitioning column value.» The default value is useless and will give confusion around the year exception err when the exception should actually provide a NULL value for a column not null.
The documentation explains how to use the EXCHANGE PARTITION and has the code example
Exchange a Partition of a partitioned Table interval
You can exchange of range partitions in a partitioned table interval. However, you must make sure that the partition of the interval was created before that you can swap partition. You can leave the database create the partition in the partition of the interval of locking.
The following example shows an Exchange partition for the
interval_sales
table, range-partitioned using the monthly from partitions of 1 January 2004. This example shows how to add data to the table using charge Exchange partition for June 2007. Assume there is only a local index on theinterval_sales
table and equivalent index have been created on theinterval_sales_june_2007
table.LOCK TABLE interval_sales PARTITION FOR (TO_DATE('01-JUN-2007','dd-MON-yyyy')) IN SHARE MODE; ALTER TABLE interval_sales EXCHANGE PARTITION FOR (TO_DATE('01-JUN-2007','dd-MON-yyyy')) WITH TABLE interval_sales_jun_2007 INCLUDING INDEXES;
Note the use of the
FOR
syntax to identify a partition that has been generated by the system. The name of the partition can be used by querying the*_TAB_PARTITIONS
view of data dictionary to find the partition system-generated name.Given that the last paragraph? That's what showed Solomon.
NOTE:-special attention to the FIRST paragraph. If you use segment carried OVER creating the partition you want to Exchange could NOT have been created yet.
Make SURE that you lock the partition as the example shows, or you will get an exception if it has not been created.
Also - we know NOT what PROBLEM you're trying to solve.
If you exchange a PARTITION of a table subpartitioned your working table should actually be partitioned using the SAME parttioning as the subparts in the source table:
See my response in this thread:
https://forums.Oracle.com/forums/thread.jspa?threadID=2482090&TSTART=30
In this thread I have provide the code example illustrating how the table should be created and made Exchange.
-
Move the data from the partitions again tablespace - direct table filled by ETL
Hello
We have a large composite table date-range/hash partitioned table (using time partitioning 11.2.0.3 range)
1 partition for each month and each such partition 4 under separate partitions.
We want to move some data from most significant storage but also direct table and inserted in all the days as part of the data warehouse and large table want to ensure
operations below result in errors in the data loading procedure
Suppose also should not take long to run lines 40 million or more each month.
Select *.
Of user_tab_partitions
Where table_name = 'CUSTOMER_TRANSACTION '.
And nom_partition like 'SYS % '.
- (1) Alter table retailer_transaction and rename partition < nom_partition > CUST_PART_ < YYYYMM >
- (2) tablespace create dedicated for the month of the affected partition
- ((3) alter table retailer_transaction move tablespace subpartition < sys... > < partition_tablespace > created in 2) above
ALTER table retailer_transaction change the default attributes for the partition < CUST_PART < YYYYMM > < tablespace in 2 above > tablespace)
4 global index which would eventually rebuild afterwards due to the transition if movement makes no valid.
Several local bitmap indexes that belong to partitions.
Thoughts?
Thank you
I agree in a good store of data, everything should be according to the best practices ETL or guideline. I guess it is a FACT table, because it's big enough. A method that I can share (followed in the real world big DW) is "ELP" IE Partition Exchange loading. You can find the basic architecture of the Internet.
The basic architecture is as
The source (in your case partitioned) Table--> (unpartitioned) intermediate Table--> Table possible target (partitioned)--> the cleaning activities (and overtime).
You can use any ETL tool for this (I won't mention any other reasons).
Later, you can delete the original table and use that new table as your FACT table, your application will be available all the time. There are drawbacks as most uses of double-spaced, other than normal ETL these work will take certain amount of resources so that other ALS etc. In addition, if you load a few current days during these activities you plan / program accordingly.
Your demo is also fine, but regular ETL may fail because you rename the partitions (some uses of ETL tool partition name, in case you ever ELP) also unusable global indexes can cause failure (you have local too?).
-
How add us partition on an existing table?
Hi gurus,
What would be the best way to add a partition to an existing table?
Is there a simple documentation for example?
Thank you
What would be the best way to add a partition to an existing table?
Is there a simple documentation for example?
Was it something you were ask in an interview?
You cannot add a partition to a table unless this table is a partitioned table.
The table is already partitioned? If so, after the DDL.
The Oracle documentation has examples of adding partitions to a table that is already partitioned
Adding Partitions
This section explains how to manually add partitions of a partitioned table and explains why partitions can be added specifically for partitioned more indexes.
Adding a Partition to a partitioned Table range
Use of the
ALTER
TABLE
...ADD
PARTITION
statement to add a new partition at the end 'high' (the point after the last existing partition). To add a partition at the beginning or in the middle of a table, use theSPLIT
PARTITION
clause. -
Need to create the Partition in the history table
Hello
I have an audit table that stores the data for the last 8 years in it and the customer wants to retain the data for the last 8 years. Now as adding data to this table is increasing, there is a delay in execution of report which are acquired by querying on this table.
Basically, they go a from date and to date. Then these date are compared with two columns of dates in the table. The condition of the query will be as below
TRUNC (NVL (DATE1, DATE2)) > = TRUNC (TO_DATE (?, ' dd/mm/yyyy ""))
AND TRUNC (NVL (DATE1, DATE2)) < = TRUNC (TO_DATE (?, ' dd/mm/yyyy ""))
Users can query for any date range.
I am thinking of creating a Partition of the range on this table for each month during the 8 years of data. Please suggest on the question of whether I should use partition interval range to make it more effective. And would also create an Index on this partition for the above two day columns.
12 (months) SO * 8 (years) = 98 would be created partitions. This will not overload the schema of database/Tablespace? Y at - it another effective way to set the table.
Please suggest and let me know for any clarification.
There are 2 approaches (but not limited to 2) to create the Partition on an existing table:
Note: There is no ALTER TABLE statement to convert a heap table to a partitioned table.
1. create a temporary Partitioned table with the same types of data in the column. Take a dump of the original table (HEAP) export and import the dump into the newly created partitioned intermediate table. After checking the data file the original and rename the interim even as the original table.
2 using the package Oracle DBMS_REDEFINITION automates the steps above from said (not exactly the same steps, however) and its done online - which means there is no required downtime, the original table may undergo DML operations during this process of redefinition. View partitioning of a table online with DBMS_REDEFINITION | Oracle instructor
According to my understanding if let us know as a partition interval then in April if there is an inserted record then it will create a new partition for the month of April will be of value less than 30 April 2014 "and all other documents created in April will pass under it"
Yes, it's a feature of 11g, which Oracle manages adding partitions as needed. In earlier versions DBA can add partitions manually from time to time. Reference www.gavinsoorma.com/2009/09/11g-interval-partitioning/
Here the reason for check the sent_out_datetime NVL will be NULL for few records, so in this case we want to get the records for dates of mapping them to received_datetime
In addition, try to replace the NVL with COALESCE and test it. This would help improve performance.
-
privileges for partitions and see them in object
Hello
Anyone seen this before? The dw team has an appid with privileges from read/write to a partitioned table.
connected under appid adshX, I am able to choose among stgadm3. TMUTL_FND_POSN partition (p1)
1 * select count (*) in the stgadm3. TMUTL_FND_POSN partition (p1)
SQL > /.
COUNT (*)
--------------------------------------------------------------------------------
927282
again, logged in as adshX appid, I am able to choose among object, but only the name of the table is returned.
SQL > select subobject_name, object_name, object_type, owner
of object where owner = 'STGADM3' AND object_name = "TMUTL_FND_POSN";
OWNER TYPE_OBJET PARAMETER SUBOBJECT_NAME
--------------- ---------------------- --------------------- ----------------------
STGADM3 TABLE TMUTL_FND_POSN
If connected as sys or system, the partition table AND are returned from all_objectds.
OWNER TYPE_OBJET PARAMETER SUBOBJECT_NAME
--------------- ---------------------- --------------------- ----------------------
STGADM3 TABLE PARTITION P1 TMUTL_FND_POSN
STGADM3 TABLE TMUTL_FND_POSN P_MINUS_1 PARTITION
STGADM3 TABLE TMUTL_FND_POSN
In addition, the ID adshX have access to views dba_ *, but which returns the correct results.
OWNER TYPE_OBJET PARAMETER SUBOBJECT_NAME
--------------- ---------------------- --------------------- ----------------------
STGADM3 TABLE PARTITION P1 TMUTL_FND_POSN
STGADM3 TABLE TMUTL_FND_POSN P_MINUS_1 PARTITION
STGADM3 TABLE TMUTL_FND_POSN
My first thought was that some private was missing, but because they can read/write/create tables and partitions with this id, I don't know what other private, they would need so that the information will be displayed.
It is an oracle 10g db.
Thanks, Pete>
My first thought was that some private was missing, but because they can read/write/create tables and partitions with this id, I don't know what other private, they would need so that the information will be displayed.
>
You can make it appear by granting the user to SELECT ANY TABLE or DBA, but you may not want to do. Even grant ON the table to the user allows you to hide the information of subpartion. -
Type logic Partition of an existing table
Dear all,
My database is 10gr 2 and Linux is the operating system.
One of my table in the production database is huge and contains lots of data. Table is growing daily. There are many queries that users run on this table and the selection criteria is normally the date of entry of the registration, it's an Entrty_Date field with the date data type.
I want a partition logical on this table in such a way, the table name remains the same, and data are logically partitioned.
As if the Entry_Date is from 2005, a partition is made on criteria:
2005-2006
2006-2007
.
.2011
. at the request of the user for records having entry date > 2011... the query is made only this piece of the table, which makes the fast query.
I hope that I am able to make you understand my problem. If its possible in Oracle please let me know the name of the method and I'll RND on this one. And I have to do it on an existing table that contains a lot of data.
Thank you
ImranHello
You can do this
http://www.Oracle-base.com/articles/Misc/PartitioningAnExistingTable.php
I suggest go fill through the myths of have from before backward Oracle documentation and to understand and then to proceed
http://download.Oracle.com/docs/CD/B10501_01/AppDev.920/a96612/d_redefi.htm-Pavan Kumar N
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