IOT - PCTTHRESHOLD and OVERFLOW

Hello All:
In the IOT create table statement, we specify pcttreshold and overflow. All the tail end data beyond the pcttreshold will be stored in overflow segment.
In case, if we specify pcttreshold 20 and do not specify the overflow segment, where would the tail end data beyond the 20% pcttreshold be stored?
Thanks
San~

Check below.
[http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:595657388029]
[http://www.oracle.com/technology/products/oracle9i/datasheets/iots/iot_ds.html]

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IOTs and overflow tablespace

Hi everyone,
I created an IOT without an overflow tablespace. What does Oracle do if it cannot fit a row into the index block? Do it give an error or will it use multiple index blocks to store the row of data?
Thanks,
Paul

<quote>I created an IOT without an overflow tablespace.
What does Oracle do if it cannot fit a row into the index block?</quote>
It will never happen.
An IOT defined with or without an overflow will get a default PCTTHRESHOLD of 50 ...
the allowed values are between 1 and 50.
PCTTHRESHOLD represents the percentage in an index block which could be occupied by one IOT row.
flip@FLOP> show parameter db_block_size
NAME                                 TYPE        VALUE
db_block_size                        integer     8192
flip@FLOP> create table tt
2 ( x   number     not null
3   ,c1 char(2000) not null
4   ,c2 char(2000) not null
5   ,constraint ttpk primary key (x)
6 )
7 organization index
8 ;
create table tt
ERROR at line 1:
ORA-01429: Index-Organized Table: no data segment to store overflow row-pieces
So, Oracle sees we didnt define an overflow and does some upfront checking on the declared size of the row
(BTW, it will be the same if the CHAR columns were defined as VARCHAR2).
It figures up it cannot store a row in 50% of my 8K block (there is some overhead in the block too).
flip@FLOP> create table tt
2 ( x   number     not null
3   ,c1 char(2000) not null
4   ,constraint ttpk primary key (x)
5 )
6 organization index
7 ;
Table created.
Not it can. And just to show, PCTHRESHOLD is defaulted to 50
flip@FLOP> select dbms_metadata.get_ddl( 'TABLE', 'TT') from dual;
DBMS_METADATA.GET_DDL('TABLE','TT')
CREATE TABLE "FLIP"."TT"
   (    "X" NUMBER NOT NULL ENABLE,
        "C1" CHAR(2000) NOT NULL ENABLE,
         CONSTRAINT "TTPK" PRIMARY KEY ("X") ENABLE
   ) ORGANIZATION INDEX NOCOMPRESS PCTFREE 10 INITRANS 2 MAXTRANS 255 LOGGING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS"
PCTTHRESHOLD 50
So, if you have wide rows you better have an overflow well, you have to.

When i type my email, the text would go on and on and overflows. I mean to say it doesn't autmatically hit the right hand side wall and change to next line! I have to manually press enter and then next line starts. Started happening suddenly.pls help.

When i type my email, the text would go on and on and overflows. I mean to say it doesn't autmatically hit the right hand side wall and change to next line! I have to manually press enter and then next line starts. Started happening suddenly.pls help.

Does it happen when you reply to an email? If so, it might be that there's content in the original email (like an image or something similar) that overflows the window content, therefore the Mail app, when you hit the border, follows the content below instead of going on a new line. You might wanna try that.
Also: Please do not post the whole question in the question title.

Handling Out-of-Range and Overflow

How to deal with Out-of-Range and Overflow?
Suppose I have a SQL table with one column of datatype “tinyint”.
tinyint’s range is 0-255.
Table:
create table xyz
( userid tinyint not null auto_increment,
After inserting 256 rows, we cannot insert another row .
When MySQL stores a value in a numeric column that is outside the permissible range of the column data type, MySQL rejects the out-of-range value with an error, and the insert fails.
How to deal with this situation ?
Obviously we can use some data type with very big range for e.g. bigint .. but still every data type got some maximum limit. So, there must be a way through which we can deal with this situation.

It appears that you are referring to MySQL, not Oracle. If you have a MySQL-specific question, you most likely want to post the question in the MySQL forum.
In general, though, what does it mean to you to "handle" the error? The insert throws an exception, your code can catch the exception. It can log the exception. It could, potentially, re-try the insert with a different numeric value that does not cause the failure. Is that what you mean by "handle"?
When you're designing the data model, you need to pick data types whose ranges are large enough to accommodate the data you will ultimately insert. If you want to be able to store values larger than 256, you would need to choose a data type for the column that can handle numbers that large. That means that when you are creating the data model, you need to know, realistically, how many rows each table will have and what the maximum value in any particular column will be. And you need to set the data types appropriately.
Justin

When we using overflow-x and overflow-y in tbody its not working properly. In the previous version i.e. 3.7.1 its working fine the same coding....Please help me.

''Duplicate post, continue here - [https://support.mozilla.com/en-US/questions/828024]''
when we using overflow-x and overflow-y in tbody its not working properly. In the previous version i.e. 3.7.1 its working fine the same coding....Please help me.

See:
*https://developer.mozilla.org/en/Firefox_4_for_developers#Miscellaneous_DOM_changes
*http://www.cssplay.co.uk/menu/tablescroll.html
A good place to ask questions and advice about web development is at the mozillaZine Web Development/Standards Evangelism forum.<br />
The helpers at that forum are more knowledgeable about web development issues.<br />
You need to register at the mozillaZine forum site in order to post at that forum.<br />
See http://forums.mozillazine.org/viewforum.php?f=25

I am not getting scrollbar in textarea for row=1, without applying resize and overflow-y css. How i can fix this without these properties

I am not getting scrollbar in textarea for row='1' without applying resize and overflow-y css. How i can fix this issue without these properties.

maybe the [http://forums.mozillazine.org/viewforum.php?f=25 Web Development / Standards Evangelism] mozillazine fourms will help you out better if you dont get an answer here.

Issue with paragraph styles and overflow

Hi all, I have been having a massive problem with my paragraph styles for a book I am working on for my employer.
http://cl.ly/2b3p2q412H0b1r3n1L3Z
The paragraph on the bottom right is the overflow text. For some reason, although the paragraph is all in the "body" paragraph style, once it goes into the overflow textbox, the spacing changes. If I expand the textbox on the left, everything is single spaced. It is quite bizzare.
I have also tried deleting the textbox on the right and creating a new overflow textbox, but there is no change... I can't figure out what is happening.
I am using Adobe InDesign CS5.5..
Thanks!

(Without looking at the file) Check that paragraph for "Align to baseline" settings.
See http://www.youtube.com/watch?v=Jla1sy_0FLQ for what this is :)

Event Hubs with IoT device and HTTPS

I am currently working with setting up an Azure IoT demo showcasing the power of Event Hubs and a few other technologies. The devices I am working with use very basic WiFi chips that run off AT commands. The Wifi chip and supporting microcontrollers do
not support SSL. Is there any way to upload events to event hub without SSL?

Azure Service Bus doesn't allow unsecure traffic. One solution might be to build your own bridge/proxy such as a web service where your devices talks to it and this service pushes events to Azure EventHubs.

IOT/insdexes and inserts

hi,
if we have an IOT or index made up of 100 extents, and all the data blocks in those extents are full, and then we insert a row that is supposed to go in the first data block of say the 5th extent, what happens? does all the data after the 5th extent have to be moved, or is the extent just slipped in between the 5th and 6th extent and just some data moved?
thanks

OracleGuy777 wrote:
hi,
if we have an IOT or index made up of 100 extents, and all the data blocks in those extents are full, and then we insert a row that is supposed to go in the first data block of say the 5th extent, what happens? does all the data after the 5th extent have to be moved, or is the extent just slipped in between the 5th and 6th extent and just some data moved?http://download.oracle.com/docs/cd/B28359_01/server.111/b28318/schema.htm#i23877
IOT effectively is an index and needs to store stuff in primary key's index order. That means inserting and block splits if needed.

IOT Distirbution and Replication

I am currently taking Oracle's 9i DBA training on CD. I was surprised when the course told me that unlike regular tables, Index Organized Tables do NOT support distribution and replication. This surprised me enough to come here to confirm this fact. A quick google search led me to the following Oracle document (http://otn.oracle.com/products/oracle9i/datasheets/iots/iot_ds.html) which contradicts Oracle's courseware by saying it DOES support distribution and replication.
Can anyone confirm this one way or another? And if it does support distribution and replication, how accurate is the rest of Oracle's 9i courseware?
Thank you,
Scott Davies

Check below.
[http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:595657388029]
[http://www.oracle.com/technology/products/oracle9i/datasheets/iots/iot_ds.html]

How to specify overflow clause for IOT

Hi,
I’m using OSDM v3.0.0.665
How do I specify ‘overflow’ clause for index organized table (IOT)?
I need to generate DDL something similar to this “ create table T1(…….) organization index..overflow".
In OSDM, when I open physical model and table properties ‘IOT properties’ tab, I can see dropbox for overflow segment but no values in drop box, it is blank.
I do have tablespace created in my physical model.
I’m able to generate DDL for IOT but does not have ‘overflow’ clause.
Thanks,
Vikas

David,
Thanks for your response.
After creating segment template, I’m able to generate overflow clause.
However I’m still not able to specify tablespace for both – IOT table and overflow segment.
If I specify tablespace for IOT (say T1) under ‘General’ tab and if I also specify overflow segment (with tablespace T2) under ‘IOT properties’ tab, I’d expect it to generate DDL with tablespace T1 for IOT and tablespace T2 for overflow.
However it generates DDL with overflow tablespace T1 and does not generate any tablespace clause for IOT. So, IOT is created in default tablespace for user.
I need DDL with tablespace clause for both – IOT as well as overflow segment.
Can you please help?
Also, how do I get rid of other storage clauses like PCTFREE, PCTUSED, MINEXTENTS, MAXEXTENTS etc..
Thanks,
Vikas

Regarding Overflow segments in IOT

can any one please tell me what will be contents of the overflow segments in an IOT.
documentation says
An OVERFLOW clause, which preserves dense clustering of the B-tree index by storing the row column values exceeding a specified threshold in a separate overflow data segment. This data segment can be in another tablespace also.
An OVERFLOW clause, which preserves dense clustering of the B-tree index by enabling the storage of some of the nonkey columns in a separate overflow data segment.
during the insert operations if the data extent threshold limit is reached it alloates a overflow segment right..
in the documentation it also says that non key columns in the table are also stored in the overflow segments.
CAN ANY ONE TELL ME WHAT WILL BE THE CONTENTS OF INDEX SEGMENTS AND OVERFLOW SEGMENTS FOR THE FOLLOWING TABLE.
CREATE TABLE admin_docindex2(
token CHAR(20),
doc_id NUMBER,
token_frequency NUMBER,
token_offsets VARCHAR2(512),
CONSTRAINT pk_admin_docindex2 PRIMARY KEY (token, doc_id))
ORGANIZATION INDEX
TABLESPACE admin_tbs
PCTTHRESHOLD 20
INCLUDING token_frequency
OVERFLOW TABLESPACE admin_tbs2;

The contents of the oveflow segment will be all columns defined after the including token_frequency column, in your case the token_offsets column.
As definitions for all the remaining columns within the index structure are relatively small, the pctthreashold value of 20% is not likely to come into play.
Cheers
Richard Foote
http://richardfoote.wordpress.com/

Partitioned tables and IOT

Hi All,
We had a database using IOT but now because of the performance reasons
we want to elimnate IOT table and using the Parititioned Tables.
Have you ever using the partitioned tables for ORACLE with your database?
If you have done that please share your experiences or refer me some
documents related to Partitioned tables for ORACLE to make my job more
easier.
Thanks in advance,
JP

Hi,
You will get good information from this Oracle site,
http://www.oracle.com/technology/documentation/index.html.
Thanks

IOT issue

Hi,
Initially IOT tale created with 3 columns and PK has created on these 3 columns.Now one more new column added in IOT table i.e WITHHOLD_ALL .Now i need to create PK all on these 4 columns.To do this i was tried to drop existing PK but it throwing can not drop IOT pk constraint.can you some advice how i can proceed.
CREATE TABLE org_table
   (     "YEAR" NUMBER(4,0) NOT NULL ENABLE,
     "MONTH" VARCHAR2(9 CHAR) NOT NULL ENABLE,
     "CANDIDATE_CODE" VARCHAR2(6 CHAR) NOT NULL ENABLE,
     "WITHHOLD_ALL" VARCHAR2(1 CHAR) DEFAULT 'N',
      CONSTRAINT "WITHHOLD_CAND_PK" PRIMARY KEY ("YEAR", "MONTH", "CANDIDATE_CODE") ENABLE
   ) ORGANIZATION INDEX COMPRESS 2 PCTFREE 0 INITRANS 2 MAXTRANS 255 LOGGING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "DATAONE"
PCTTHRESHOLD 50 OVERFLOW
PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 LOGGING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "DATATWO" ;

>
I guess we're going to quiblle over the definition of "unusual".
The use cases for IOTs are pretty niche to start with: ref data look-ups and the like. Generally there aren't many multi-column tables where the only access is through the primary key and no other path except a full table scan. Which is not the same as "none".
I'd be interested to know what your use cases are (if you can spill the beans).
>
Hey - are you two having a private 'quiblle' or can anyone jump in and stir things up?
>
Are you certain you want to add what appears ro be a yes/no flag to that table's primary key? It is permitted to have columns on IOTs which aren't part of the PK (although more than one would be unusual).
>
I'd argue just the opposite; having only ONE non-PK column would be unusual.
An IOT is a table and I rarely run use, or see others use, a table with only two columns. In the U.S. a state lookup table might have
1. STATE_SEQ - Primary key and used for referential integrity
2. ABBREVIATION (e.g. CA)
3. STATE_NAME (e.g. Californiak)
4. Several other pieces of data that might be used: date joined the union, state flag, state flower, etc
The data is stored in the leaves, only keys are stored in the branches.
Many small tables, particularly lookups, can benefit by being IOTs instead of a heap table and an index. I submit that it 'would be unusual' to use all but one column in the key.

Error ORA-39125 and ORA-04063 during export for transportable tablespace

I'm using the Oracle Enterprise Manager (browser is IE) to create a tablespace transport file. Maintenance...Transport Tablespaces uses the wizard to walk me through each step. The job gets created and submitted.
The 'Prepare' and 'Convert Datafile(s)' job steps complete successfully. The Export step fails with the following error. Can anyone shed some light on this for me?
Thank you in advance!
=======================================================
Output Log
Export: Release 10.2.0.2.0 - Production on Sunday, 03 September, 2006 19:31:34
Copyright (c) 2003, 2005, Oracle. All rights reserved.
Username:
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - Production
With the Partitioning, OLAP and Data Mining options
Starting "SYS"."GENERATETTS000024": SYS/******** AS SYSDBA dumpfile=EXPDAT_GENERATETTS000024.DMP directory=EM_TTS_DIR_OBJECT transport_tablespaces=SIEBEL job_name=GENERATETTS000024 logfile=EXPDAT.LOG
Processing object type TRANSPORTABLE_EXPORT/PLUGTS_BLK
Processing object type TRANSPORTABLE_EXPORT/TABLE
Processing object type TRANSPORTABLE_EXPORT/TABLE_STATISTICS
ORA-39125: Worker unexpected fatal error in KUPW$WORKER.UNLOAD_METADATA while calling DBMS_METADATA.FETCH_XML_CLOB [TABLE_STATISTICS]
ORA-04063: view "SYS.KU$_IOTABLE_VIEW" has errors
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105
ORA-06512: at "SYS.KUPW$WORKER", line 6241
----- PL/SQL Call Stack -----
object line object
handle number name
2CF48130 14916 package body SYS.KUPW$WORKER
2CF48130 6300 package body SYS.KUPW$WORKER
2CF48130 2340 package body SYS.KUPW$WORKER
2CF48130 6861 package body SYS.KUPW$WORKER
2CF48130 1262 package body SYS.KUPW$WORKER
2CF0850C 2 anonymous block
Job "SYS"."GENERATETTS000024" stopped due to fatal error at 19:31:44

More information:
Using SQL Developer, I checked the view SYS.KU$_IOTABLE_VIEW referred to in the error message, and it does indeed report a problem with that view. The following code is the definition of that view. I have no idea what it's supposed to be doing, because it was part of the default installation. I certainly didn't write it. I did, however, execute the 'Test Syntax' button (on the Edit View screen), and the result was this error message:
=======================================================
The SQL syntax is valid, however the query is invalid or uses functionality that is not supported.
Unknown error(s) parsing SQL: oracle.javatools.parser.plsql.syntax.ParserException: Unexpected token
=======================================================
The SQL for the view looks like this:
REM SYS KU$_IOTABLE_VIEW
CREATE OR REPLACE FORCE VIEW "SYS"."KU$_IOTABLE_VIEW" OF "SYS"."KU$_IOTABLE_T"
WITH OBJECT IDENTIFIER (obj_num) AS
select '2','3',
t.obj#,
value(o),
-- if this is a secondary table, get base obj and ancestor obj
decode(bitand(o.flags, 16), 16,
(select value(oo) from ku$_schemaobj_view oo, secobj$ s
where o.obj_num=s.secobj#
and oo.obj_num=s.obj#),
null),
decode(bitand(o.flags, 16), 16,
(select value(oo) from ku$_schemaobj_view oo, ind$ i, secobj$ s
where o.obj_num=s.secobj#
and i.obj#=s.obj#
and oo.obj_num=i.bo#),
null),
(select value(s) from ku$_storage_view s
where i.file# = s.file_num
and i.block# = s.block_num
and i.ts# = s.ts_num),
ts.name, ts.blocksize,
i.dataobj#, t.bobj#, t.tab#, t.cols,
t.clucols, i.pctfree$, i.initrans, i.maxtrans,
mod(i.pctthres$,256), i.spare2, t.flags,
t.audit$, t.rowcnt, t.blkcnt, t.empcnt, t.avgspc, t.chncnt, t.avgrln,
t.avgspc_flb, t.flbcnt, t.analyzetime, t.samplesize, t.degree,
t.instances, t.intcols, t.kernelcols, t.property, 'N', t.trigflag,
t.spare1, t.spare2, t.spare3, t.spare4, t.spare5, t.spare6,
decode(bitand(t.trigflag, 65536), 65536,
(select e.encalg from sys.enc$ e where e.obj#=t.obj#),
null),
decode(bitand(t.trigflag, 65536), 65536,
(select e.intalg from sys.enc$ e where e.obj#=t.obj#),
null),
(select c.name from col$ c
where c.obj# = t.obj#
and c.col# = i.trunccnt and i.trunccnt != 0
and bitand(c.property,1)=0),
cast( multiset(select * from ku$_column_view c
where c.obj_num = t.obj#
order by c.col_num, c.intcol_num
) as ku$_column_list_t
(select value(nt) from ku$_nt_parent_view nt
where nt.obj_num = t.obj#),
cast( multiset(select * from ku$_constraint0_view con
where con.obj_num = t.obj#
and con.contype not in (7,11)
) as ku$_constraint0_list_t
cast( multiset(select * from ku$_constraint1_view con
where con.obj_num = t.obj#
) as ku$_constraint1_list_t
cast( multiset(select * from ku$_constraint2_view con
where con.obj_num = t.obj#
) as ku$_constraint2_list_t
cast( multiset(select * from ku$_pkref_constraint_view con
where con.obj_num = t.obj#
) as ku$_pkref_constraint_list_t
(select value(ov) from ku$_ov_table_view ov
where ov.bobj_num = t.obj#
and bitand(t.property, 128) = 128), -- IOT has overflow
(select value(etv) from ku$_exttab_view etv
where etv.obj_num = o.obj_num)
from ku$_schemaobj_view o, tab$ t, ind$ i, ts$ ts
where t.obj# = o.obj_num
and t.pctused$ = i.obj# -- For IOTs, pctused has index obj#
and bitand(t.property, 32+64+512) = 64 -- IOT but not overflow
-- or partitioned (32)
and i.ts# = ts.ts#
AND (SYS_CONTEXT('USERENV','CURRENT_USERID') IN (o.owner_num, 0) OR
EXISTS ( SELECT * FROM session_roles
WHERE role='SELECT_CATALOG_ROLE' ));
GRANT SELECT ON "SYS"."KU$_IOTABLE_VIEW" TO PUBLIC;

IOT - PCTTHRESHOLD and OVERFLOW

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