Disable the index dynamically

Hi,
How to disable the index in a table dynamically.
Thanks
Radha

Hi
An index can be used to ensure uniqueness as well, eg for a PK or UK. In these cases it is not an option not having an index, or to have it disabled or unusable. As the indexed column is named "emp_id", I guess that is the case...
The OP seems vehemently not wanting to use the index. I am curious to know why... It would be nice if people gave some more background when making their questions.
Luis

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How to disable the index in oracle

Hi,
Is there any way we can disbal the index in oracle.
For the performance issue,I want to disable some of the indexes which i have created earlier. I dont want to drop the index.
I tried the below command
Alter Index <Schema>.<Index_name> Disable;
I am getting the below error message:
ORA-02243: invalid ALTER INDEX or ALTER MATERIALIZED VIEW option
Thanks,
Krishna
.

Hello,
I have a question related to disabing index and thought I would post it in thread.
I'm altering a column length to increase the size and getting "ORA-30556: functional index is defined on the column to be modified".
On searching more about this error, it seems like the function index must be dropped before altering the column.
The table I'm dealing with is huge.
Question 1:
In case of dropping and recreating the index, should the following steps be done:
- Drop Index
- Alter the column to increase the size
- Recreate the index with NOLOGGING and NOPARALLEL clause
- ALTER INDEX to turn on LOGGING
- Gather Statistics on that index
Question 2:
Is there anything else that should be done when the index is dropped and re-created?
Question 3:
What are the side-effects of carrying out the above steps in a huge table with around 15 million rows?
Question 4:
Would it work if I disable the index, alter the column and reenable the index?
Do I have to rebuild the index and gather Stats upon reenabling it?
Thanks!

Sorry Disable the index

Hi is it possible to Disable the index?
Thanks in advance
siva

In what way?
You can disable a function based index.
You can mark an index as unusable which will speed up direct path loads.
You can specify a hint to ignore an index in a DML statement.

CONTAINS clause still works after disabling fulltext index on a table

I disabled the fulltext index on a table using the below query:
USE <dbname>;
GO
ALTER FULLTEXT INDEX ON <table_name> DISABLE
Per BOL, "The table will not support full-text queries while the index is disabled.", I would expect the CONTAINS clause to stop working but I can still return rows from the <table_name> as before.
SELECT top 10 *
FROM [dbo].[table_name]
WHERE CONTAINS(<column>, N'test');
The above returns 10 rows before and after disabling the index.
Do i need to do something else?
I even tried DENY permissions:
DENY CONTROL, TAKE OWNERSHIP, ALTER, REFERENCES, VIEW DEFINITION ON FULLTEXT CATALOG::<catalog_name>
TO <some_database_roles including public>
Please help.
Thanks
Thanks

Charles,
Do you have any DDL Triggers on your server that might affect whether the full text index could be disabled?
Any Policies that might likewise affect your results?
RLF

Why isn't my query using the index?

I have a query that inserts values for engines in a grid; it uses a static date table to determine the day in week, or
week in year (depending on different standards, the DBA can configure this table to their business's likings). I have
two indexes on this table:
create table d_date (
     date_key number(5) not null,
     sql_calendar_date timestamp(3) null,
     year_id number(5) null,
     month_id number(3) null,
     day_id number(3) null,
     year_end_biz_date timestamp(3) null,
     qtr_end_biz_date timestamp(3) null,
     month_end_biz_date timestamp(3) null,
     week_end_biz_date timestamp(3) null,
     quarter_id number(3) null,
     week_id number(3) null,
     day_in_year number(5) null,
     day_in_month number(3) null,
     day_in_week number(3) null,
     month_name char(3) null,
     day_in_week_name char(3) null,
     month_type_code char(1) null,
     week_type_code char(1) null,
     date_type_code char(1) null,
     weekend_flag char(1) null,
     holiday_flag char(1) null,
     from_datetime timestamp(3) null,
     to_datetime timestamp(3) null,
     current_flag char(1) null,
     constraint d_date_pkey primary key (date_key)
     ) tablespace dim;
create index d_date_dy on d_date(year_id, day_in_year) tablespace_dim_idx;
create index d_date_ww on d_date(year_id, week_id) tablespace_dim_idx;Now, when I run a query to insert the week id into a table based on two values, the year_key and day_in_year_key,
it should use the d_date_dy index correct?
Here is what the query looks like:
INSERT INTO F_ENGINE (YEAR_KEY,MONTH_KEY,WEEK_IN_YEAR_KEY,DAY_IN_YEAR_KEY,DAY_IN_MONTH_KEY,HOUR_IN_DAY_KEY, Q_HOUR_IN_DAY_KEY,
GRID_KEY,ENGINE_KEY,TIME_STAMP,ENGINE_CPU_UTIL,ENGINE_CPU_GRID_UTIL,MEMORY_TOTAL_BYTE, MEMORY_FREE_BYTE,DISK_FREE_MEGABYTE,
PROCESS_COUNT,ENGINE_ID,GRID_ID,GRID_NAME,BATCH_ID,RECORD_VIEWABLE_F)
SELECT EXTRACT(YEAR FROM START_DATETIME),EXTRACT(MONTH FROM START_DATETIME), DD.WEEK_ID,
TO_NUMBER(TO_CHAR(START_DATETIME, 'DDD')), EXTRACT(DAY FROM START_DATETIME),EXTRACT(HOUR FROM START_DATETIME),
FLOOR(EXTRACT(MINUTE FROM START_DATETIME)/15)*15,DG.GRID_KEY,DE.ENGINE_KEY, START_DATETIME,CPU_UTIL,DS_CPU,MEMORY,
FREE_MEMORY,FREE_DISK,PROCESSES,ID,PE.GRID,DG.GRID_NAME,:B1 ,1
FROM P_ENGINE PE, D_GRID DG, D_ENGINE DE, D_DATE DD
WHERE PE.GRID = DG.GRID_ID AND DG.CURRENT_FLAG = 'Y' AND PE.ID = DE.ENGINE_ID AND DE.GRID_KEY = DG.GRID_KEY AND
DE.CURRENT_FLAG = 'Y' AND PE.BATCH_ID = :B1 AND DD.YEAR_ID = EXTRACT(YEAR FROM START_DATETIME) AND
DD.DAY_IN_YEAR = TO_NUMBER(TO_CHAR(START_DATETIME,'DDD'))
ORDER BY EXTRACT(YEAR FROM START_DATETIME),EXTRACT(MONTH FROM START_DATETIME),
EXTRACT(DAY FROM START_DATETIME),EXTRACT(HOUR FROM START_DATETIME),FLOOR(EXTRACT(MINUTE FROM START_DATETIME)/15)*15,
DG.GRID_KEY,DE.ENGINE_KEY
Here is the explain plan:
Operation Object Object Type Order Rows Size (KB) Cost Time (sec) CPU Cost I/O Cost
INSERT STATEMENT
SORT ORDER BY
     HASH JOIN
       HASH JOIN
         HASH JOIN
          TABLE ACCESS FULL D_GRID TABLE 1 2 0.316 3 1 36887 3
          TABLE ACCESS FULL D_ENGINE TABLE 2 10 0.410 3 1 42607 3
         PARTITION LIST SINGLE   5 1434 344.496 9 1 2176890 9
          TABLE ACCESS FULL P_ENGINE TABLE 4 1434 344.496 9 1 2176890 9
            TABLE ACCESS FULL D_DATE TABLE 7 7445 283.550 19 1 3274515 18Now it is obviously not using the index for the d_date table since it is doing a full table access.
Does this have something to do with the fact that I am using extract(), to_number(), to_char() functions in my WHERE clause that it is not allowing the use of the index?
Any help would be greatly appreciated. Thanks.
-Tim

It's difficult to tell just from this. For one thing, you didn't post your query using the forum format tags, so it's hard to read and you didn't post your Oracle version.
In the query, you don't always prefix columns with the table alias. That makes it impossible for us (and maintainers of this code) to know at a glance which table a column is in.
It's possible that performing functions on a column will disable the index. Do your other tables have indexes? Do you have updated statistics on all the tables?
The main reason the optimizer will not use an index is because it thinks it cheaper not to.

How to configure TREX so it does not include title in the index created

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Can someone tell me where I can find the TREX configuration that disables the indexing of the html title. If I for instance want to index www.sap.com, and I do not want the title = "SAP - Business Software Solutions Applications and Services" to be indexed, how do I do that?
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Disable content indexing for passive nodes

I have three node DAGs where one node is DR in another site.
Have noticed large amounts of traffic on my production network to DR and discovered it was indexing.
Is it best practice to disable the indexing service on passive nodes? In the event of DR you would lose search, and you would have to disable client experience checks. But other than that, I cannot a real downside. Can someone
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Hi RAY1357,
Great information from JasonApt.
We can disabled on a specific mailbox database by using EMS:
Set-MailboxDatabase <name> -IndexEnabled:$False.
To disable indexing completely on a mailbox server, we can just stop the "Microsoft Exchange Search Indexer" service.
Found a blog, it applied to Exchange 2007, just for your reference:
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http://blogs.technet.com/b/exchangesearch/archive/2010/07/02/exchange-2007-search-part-2-content-indexing.aspx
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How to get the index of subform in dynamic Forms??

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Please suggest .
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Edited by: Lavanya YH1504 on Jul 30, 2010 1:20 PM

I got it thank you.
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I want to disable the Dynamic Selection Icon from T.Code FBL1N...
Please Note that i found a link where some code is given for this problem.
Remove the dynamic selection screen.......
Please tell me where i paste that code....after initialization or where....
Thanks...
Edited by: Prince Kumar on May 16, 2009 8:59 AM

Hi,
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How to get the index of Mult column list box

Hello all,
I need small help. Please help me.
Is there is any property to change the "Multi column list box" row index position dynamically?
I want to change the index position at runtime like below.
Munna
Solved!
Go to Solution.

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Disable the index dynamically

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