Question about 'direct' parameter in sql loader utility

Hi eveyone,
Today I was asked what the advantages and disadvantages of 'direct' parameter of sql loader.
In my opinion, if swithing direct on, oracle use direct path load.
And it has no difference from the append hind in insert statement.
The core merits are less redo hence faster.
The main shortcoming is since little redo generated, we have to ask DBA to back up the data according to the rules immediately after the loading.
Does my answer make sense or not? Plesae help to point out the important things I missed.
best regards,
Leon

Hi,
Direct path Export is much faster than conventional path Export because the data is read from disk into the buffer cache and rows are transferred directly to the Export client.
Some conditions to use DIRECT parameter are,
1. The Export parameter BUFFER applies only to conventional path Exports. For direct path Export, use the RECORDLENGTH parameter to specify the size of the buffer that Export uses for writing to the export file.
2. You cannot use direct path when exporting in tablespace mode (TRANSPORT_TABLESPACES=Y).
3. The QUERY parameter cannot be specified in a direct path Export.
Thanks

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Hello:
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BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
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This was precisely what I did
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are queired. I don't really understand the link in terms of impact that one can have on the other or better to say rather, why there is an impact
Could anyone kindly make some clarification?
thanks in advance,
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Dariyoosh

>
and also v$session page, yet I didn't find anything indicating that SERVEROUTPUT should be switched off whenever views such as v$sql, v$session
are queired. I don't really understand the link in terms of impact that one can have on the other or better to say rather, why there is an impact
Hi Dariyoosh,
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Here below what Tom Kyte is explaining in this page:
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How about...
/code
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LRM-00112: multiple values not allowed for parameter 'control' - SQL Loader

Hi,
Please can someone help me identify why the below SQL* Loader test doesn't work and i get the error in the subject header?
ctl file (load.ctl)
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SQL*Loader: Release 8.0.6.3.0 - Production on Wed Jan 12 13:31:50 2011
(c) Copyright 1999 Oracle Corporation. All rights reserved.
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Sql Loader Utility

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when using sql loader? What command I need to use?
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Thats a keyword you specify in your control file like below ...
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INFILE *
APPEND
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http://download-west.oracle.com/docs/cd/A87860_01/doc/server.817/a76955/ch05.htm#1892

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Question about using objects in SQL query.

I had posted this question in the SQL/PLSQL forum but I guess nobody took the time to understand exactly what I am asking so I decided to try here hoping to get the answer. So here is the thing:
I have created generic object type "tree" - the constructor takes as a parameter sql query which returns "node_id" and "parent_node_id" - this is all we need to have a tree. The object has all related to a tree structure member functions and one of them is "oldest_relative" (the tree may not be fully connected - it may be more like a set of many trees, so it's not necessary all nodes to have the same root).
I also have departments table with the following fields: department_id, parent_department_id, department_name,...
all records in the table w/out parent_departments (parent_department_id is null) are considered divisions.
Now if I run the following query:
SELECT "DEPARTMENT_ID", "PARENT_DEPARTMENT_ID", "DEPARTMENT_NAME", tree('select department_id "node_id", parent_department_id "parent_node_id" from departments').oldest_relative("DEPARTMENT_ID") "DIVISION_ID" FROM departments
my question is: Is the tree object created for every row or does Oracle somehow caches the object since the object itself is not changing but only the parameter for the oldest_relative member function.
The table only has a few hunderd records and I can't see much of a difference in the execution time btw the query above and query like this:
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FROM departments left join (select tree('select department_id "node_id", parent_department_id "parent_node_id" from departments') t from dual) b on 1 = 1
where the object is clearly created just ones. (there is probably a better way to do it instead of this join)
Pls elaborate
George

Not exactly sure what the question is...
As I understand, you are comparing the following two constructor calls:
+select.. tree('select department_id "node_id", parent_department_id "parent_node_id" from departments').oldest_relative("DEPARTMENT_ID") ... FROM ...+
+select tree('select department_id "node_id", parent_department_id "parent_node_id" from departments') ... FROM dual+
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The latter one is against DUAL which only has a single row. So that constructor is only called once. The former can be against multiple rows. Obviously a single pass through a data set is desirable - which means that the sub-select (use by the constructor) should ideally only be executed once and makes the 2nd method more desirable.
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PL memory is expensive. It is not sharable.
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Another question about using objects in SQL queries

Hi gurus, I need your thoughts on this:
I have created generic object type "tree" - the constructor takes as a parameter sql query returning "node_id" and "parent_node_id". As a tree - the object has all related to a tree structure member functions and one of them is "oldest_relative" (the tree may not be fully connected - it may be more like a set of many trees, so it's not necessary all nodes to have the same root).
I also have departments table with the following fields: department_id, parent_department_id, department_name,...
all records in the table w/out parent_departments (parent_department_id is null) are considered divisions.
Now if I run the following query:
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my question is: Is the tree object created for every row or does Oracle somehow caches the object since the object itself is not changing but only the parameter for the oldest_relative member function.
The table only has a few hunderd records and I can't see much of a difference in the execution time btw the query above and query like this:
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FROM departments left join (select tree('select department_id "node_id", parent_department_id "parent_node_id" from departments') t from dual) b on 1 = 1
where the object is clearly created just ones. (there is probably a better way to do it instead of this join)
Pls elaborate
George

Hi, TREE is not a function but PL/SQL object type I have written representing tree structure. The Oracle version is 10g.

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I hope I am posting this in the right forum.
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(Oh, and there is no text involved in this. I just got this code off a tutorial and I haven't changed the variable names yet)
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Thanks for your reply. I'll try to explain it better. I have a long, vertically scrolling movie clip. This movie clip contains lots of thumbnails. When I click a thumbnail, the full sized image is loaded from the library and displayed within the same movie clip. when I click the full size movie clip, it disappears again, and I can click another thumbnail to display another full size image. So I'm not just adding more and more stuff to the gallery if that's what you were thinking. I'm just clicking thumbnails to display the full size image so I can look at it, closing it, and moving on.
But the full sized image is fixed at the very top of the scrolling movie clip, so if I click a thumbnail at the very bottom, I have to scroll all the way back up to the top to see the full size image. I just want the full size image to appear on screen no matter how far down I have scrolled to click a thumbnail.
I made my basic gallery useing this tutorial:
http://flashexplained.com/actionscript/making-the-ultimate-dynamic-image-gallery-in-flash- 8/
if you want to take a look at that, to get an idea of what I'm talking about.
Now I'm just trying to add some scrolling functionality, which wasn't included, but I don't really understand actionscript well enough to do this easily on my own.
Sorry for the long reply. I hope this is clearer.

Question about 'direct' parameter in sql loader utility

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