How did the same predicate is completed access and filter?

SELECT select, j.job_title, d.department_name

OF e hr.employees, hr.departments d, hr.jobs j

WHERE e.department_id = d.department_id

AND e.job_id = j.job_id

AND select LIKE 'a % ';

Execution plan

----------------------------------------------------------

Hash value of plan: 975837011

---------------------------------------------------------------------------------------------

| ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

---------------------------------------------------------------------------------------------

| 0 | SELECT STATEMENT | 3. 189. 7 (15) | 00:00:01 |

|* 1 | HASH JOIN | 3. 189. 7 (15) | 00:00:01 |

|* 2 | HASH JOIN | 3. 141. 5 (20) | 00:00:01 |

| 3. TABLE ACCESS BY INDEX ROWID | EMPLOYEES | 3. 60. 2 (0) | 00:00:01 |

|* 4 | INDEX RANGE SCAN | EMP_NAME_IX | 3 | | 1 (0) | 00:00:01 |

| 5. TABLE ACCESS FULL | JOBS | 19. 513. 2 (0) | 00:00:01 |

| 6. TABLE ACCESS FULL | DEPARTMENTS | 27. 432. 2 (0) | 00:00:01 |

---------------------------------------------------------------------------------------------

Information of predicates (identified by the operation identity card):

---------------------------------------------------

1 - access("E".") DEPARTMENT_ID "=" D ". ("" DEPARTMENT_ID ")

2 - access("E".") JOB_ID '=' J '. ("' JOB_ID ')

4 - access ("E". "Last_name" LIKE 'A %') "

filter ("E". "LAST_NAME" LIKE 'A %') "

I understand not only how to select column is evaluated by the access and filter? Can someone there explain please? Or recommend me an article or document that explain this predicate excatly explains to explain the plan?

Thanks in advance.

Near NightWing.

I believe that the predicate can be used to access THE index entries and if entries of access could include potentially "false positives" then filtering is required to remove the FPs.

This filtering can be done in the same step of the operation (such as access) or as an extra step.

My apologies, this has become much longer and more detailed that I intended it to be. :-(

If I understand correctly,

In terms of the explanation of the path, each step can include access and filtering process for "entries" (index or line). In the plan to explain the predicate section shows Information the use of predicate for step 'matching. "

Some predicates can be "used" to ACCESS (ing) the entries, while the same or additional predicates (or even other) can be "used" to FILTER (ing) access entries (which have been consulted, but the optimizer is not sure that EACH AACCESSed entry is indeed a part of final result set). In such cases optimizer applies filtering predicate also during the operation stage. The optimizer can sometime even add additional operation steps or predicate [almost like a short circuit]

So, using our previous configuration, allow us to run test cases.

In this query we use AS predicate but the operand does NOT contain any 'wild' character In this case INDEX RANGE SCAN is performed, but since there is no wild characters are involved we can be sure that each entry using this predicate is indeed part of the final result set. This predicate Section shows that the predicate is used ONLY to access (index) entries.

We know that the result set of this query is NULL lines.

> explain plan for select v1 of tst where v1 as "A".

------------------------------------------------------------------------------

| ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

------------------------------------------------------------------------------

| 0 | SELECT STATEMENT | | 1. 7. 1 (0) | 00:00:01 |

|* 1 | INDEX RANGE SCAN | TSTV1_IDX | 1. 7. 1 (0) | 00:00:01 |

------------------------------------------------------------------------------

Information of predicates (identified by the operation identity card):

---------------------------------------------------

1 - access ("V1" = 'A')

However, in this application, there is a wildcard character in the predicate, so while the INDEX RANGE SCAN step access entries using this predicate, it could potentially access entries that can be part of the final result set. So in the SAME step of the INDEX RANGE SCAN operation the predicate is also used for filtering. Since this is the only predicate, it may seem redundant.

> explain plan for select v1 of tst where v1 like 'a % '.

------------------------------------------------------------------------------

| ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

------------------------------------------------------------------------------

| 0 | SELECT STATEMENT | | 24. 168. 1 (0) | 00:00:01 |

|* 1 | INDEX RANGE SCAN | TSTV1_IDX | 24. 168. 1 (0) | 00:00:01 |

------------------------------------------------------------------------------

Information of predicates (identified by the operation identity card):

---------------------------------------------------

1 - access ("V1" LIKE 'A %')

filter ("V1" LIKE 'A %')

If we add an another predicate as below (also includes wild character), it gets interesting. INDEX RANGE SCAN step performs two access AND filtering.

Please note that the predicate 'V1' AS '%' is used to ACCESS and FILTER, fine FILTER uses additional predicates.

> explain plan for select v1 of tst where v1 like 'A %' and v1 as "%c".

------------------------------------------------------------------------------

| ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

------------------------------------------------------------------------------

| 0 | SELECT STATEMENT | | 1. 7. 1 (0) | 00:00:01 |

|* 1 | INDEX RANGE SCAN | TSTV1_IDX | 1. 7. 1 (0) | 00:00:01 |

------------------------------------------------------------------------------

Information of predicates (identified by the operation identity card):

---------------------------------------------------

1 - access ("V1" LIKE 'A %')

filter ("V1" IS NOT NULL AND "V1" LIKE 'A %') AND "V1" LIKE "%c"

When we change the predicate 'V1' LIKE 'A %' to 'V1' > 'A', then we can use the predicate to access entries AND do not forget that each entry using this predicate are

Indeed part of results if other predicates are met. In this case optimizer of must not filter on 'V1' > 'A', wherever it must continue to filter on 'V1' LIKE '%c '.

> explain plan for select v1 of tst where v1 > 'A' and v1 as "%c".

------------------------------------------------------------------------------

| ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

------------------------------------------------------------------------------

| 0 | SELECT STATEMENT | | 1. 7. 1 (0) | 00:00:01 |

|* 1 | INDEX RANGE SCAN | TSTV1_IDX | 1. 7. 1 (0) | 00:00:01 |

------------------------------------------------------------------------------

Information of predicates (identified by the operation identity card):

---------------------------------------------------

1 - access("V1">'A')

filter ("V1" IS NOT NULL AND "V1" LIKE "%c")

Of course, if we do the predicate so that the entries are NOT accessible using the predicate, then for INDEX FULL SCAN (no Beach cannot be determined) operation comes into play and the predicate of ACCESS goes. All entries in the index are ALWAYS accessible (predicate applied no ACCESS) and FILTER predicate is applied.

> explain plan for select v1 of tst where v1 like '%c %'

------------------------------------------------------------------------------

------------------------------------------------------------------------------

| 0 | SELECT STATEMENT | | 1. 8 S 1 (0) | 00:00:01 |

|* 1 | INDEX SCAN FULL | TSTV1_IDX | 1. 8 S 1 (0) | 00:00:01 |

------------------------------------------------------------------------------

Information of predicates (identified by the operation identity card):

---------------------------------------------------

1 - filter ("V1" IS NOT NULL AND "V1" LIKE '%A%c')

For the example proposed by JL, two predicates are used in the INDEX RANGE SCAN step to access THE entries. In addition, we can be sure that all entries that are accessible with success using this predicate can be included in the final result set. So not necessary filtering.

> explain plan for select v1 of tst where v1 > 'A' and v1<>

------------------------------------------------------------------------------

| ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

------------------------------------------------------------------------------

| 0 | SELECT STATEMENT | | 24. 168. 1 (0) | 00:00:01 |

|* 1 | INDEX RANGE SCAN | TSTV1_IDX | 24. 168. 1 (0) | 00:00:01 |

------------------------------------------------------------------------------

Information of predicates (identified by the operation identity card):

---------------------------------------------------

1 - access("V1">'A' AND "V1")<>

Interestingly, when we change the 'B' in the previous query to 'A', change predicates of inequality, so we cannot use index. Optimizer knows this and switches for FTS and introduced an additional step of operation FILTER. In my view, the filter predicate can be applied in operation of FTS. Additional FILTER stage is the predicate as FALSE hard-coded value. It does not yet use our predicate of the query.

Well, don't know if he actually bypasses the operation of FTS. SQL trace can indicate that.

> explain plan for select v1 of tst where v1 > 'A' and v1<>

---------------------------------------------------------------------------

| ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

---------------------------------------------------------------------------

|   0 | SELECT STATEMENT |      |     1.     8 S     0 (0) |          |

|* 1 | FILTER |      |       |       |            |          |

|   2.   TABLE ACCESS FULL | TST |    49.   343.     3 (0) | 00:00:01 |

---------------------------------------------------------------------------

Information of predicates (identified by the operation identity card):

---------------------------------------------------

1 - filter (NULL IS NOT NULL AND NULL IS NOT NULL)

Subsequently, optimizer decides to use the INDEX RANGE SCAN, even if the predicate is always an inequality. Go figure...

> explain plan for select v1 of tst where v1 > 'A' and v1<=>

-------------------------------------------------------------------------------

| ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

-------------------------------------------------------------------------------

|   0 | SELECT STATEMENT |           |     1.     8 S     0 (0) |          |

|* 1 | FILTER |           |       |       |            |          |

|* 2 |   INDEX RANGE SCAN | TSTV1_IDX |     1.     8 S     0 (0) | 00:00:01 |

-------------------------------------------------------------------------------

Information of predicates (identified by the operation identity card):

---------------------------------------------------

1 - filter (NULL IS NOT NULL)

2 - access("V1">'A' AND "V1")<>

As others have said, it is difficult to understand and predict the path, but fortunately Oracle doing the right thing, 99% of the time.

Sudhakar

Tags: Database

Similar Questions

FROM SHAPED DATENREPORT (how on the same page)
Hello everyone

Yes, I know that it is built in a design of two pages where the first is the form and the second report, but I want it for both on the same page so that you can see what he has on the report and add his own line to the table. Well, I could make the creation of a form, then by changing the page and then add another region. Alright. But then I don't know how to link them together so that the data is passed to the form of the report.

Additionally, the form to fill the data must pass in two separate tables, because a table contains the details of the location and the other opinion about each store. Easy to do on PHP and mysql, but here I'm lost.

Second thing that drives me crazy it is that I created a table named location as well as street postal code for a store and another for assessment so that customers or workers add a suite evaluate services etc.

Well, I'm trying to create that shape, that I first talked about this would hold all fields and I do on a SQL query that contains the definitions of the two tables. My XE is completely empty from the remains of other applications, etc. I do the equijoin alright

Select l.loc_id, l.company, l.postcode, l.street, l.town, e.eval_id, e.loc_id, e.locum_reg, e.date_booked, e.items, e.addicts, e.number_staff, e.attitude_staff, e.organisation, e.stock_filing, e.agency
location, e-assessment
where l.loc_id = e.loc_id

and I get this annoying error all the time

ORA-20001: unable to create the form on equijoin. ORA-20001: Error Page = 2 item = 'P2_LOC_ID' id = '1324114494879878' ORA-20001: error page 2 item = = "P2_LOC_ID" id = "1324114494879878" a same name something like existing at the level of applications. ORA-0000: normal end successfully

Well, if this form consists of two tables, it must definitely something in common with them! How did the name of the element suppose to have another name? It is made with the wizzard so supposedly the wizzard you should know, but I tried two days 14 hours a day.

no indication of how this problem would be invaluable for me

Thank you

Alvaro
Alvaro:

This help if you supplied alias names to the "loc - id" of each table column in the SQL query? Something like
```
select l.loc_id location_loc_id, l.company, l.postcode, l.street,l.town, e.eval_id, e.loc_id evaluation_loc_id, e.locum_reg, e.date_booked, e.items, e.addicts, e.number_staff, e.attitude_staff, e.organisation, e.stock_filing, e.agency
from location l, evaluation e
where l.loc_id = e.loc_id
```
CITY

How do I know if I have more than one of the same song in my library, and if I do how do I remove it without deleting both copies?

Original title: Windows 7 Media Player

How do I know if I have more than one of the same song in my library, and if I do how do I remove it without deleting both copies?

Hello

Duplicates would be revealed by the observation. If found you are probably followed the same
record twice.

Add items to the Windows Media Player library - see the monitoring records - and delete a folder
controlled by the player.
http://Windows.Microsoft.com/en-us/Windows7/add-items-to-the-Windows-Media-Player-library

Remove items from the Windows Media Player library
http://Windows.Microsoft.com/en-us/Windows7/remove-items-from-the-Windows-Media-Player-library

Add or edit media information in Windows Media Player
http://Windows.Microsoft.com/en-us/Windows7/add-or-edit-media-information-in-Windows-Media-Player

The Windows Media Player library: frequently asked questions
http://Windows.Microsoft.com/en-us/Windows7/Windows-Media-Player-library-frequently-asked-questions

Getting started with Windows Media Player
http://Windows.Microsoft.com/en-us/Windows7/getting-started-with-Windows-Media-Player#section_4

--------------------------------------------------------

The library may be corrupted if necessary, after the media library - advanced - restore tools above...
Reset the library will result in the loss of all of the counties of game and probably both sides.

================================================================

If you think there is duplicate in separate folders files:

Here are a few utilities to help, be sure to remove duplicates once and good
folder. If If doubt copy the file to another folder, delete and then check WMP.

Here are several free utilities and they have all their benefits and their methods.

Auslogics Duplicate File Finder is the MD5 search engine that allows you to find duplicate
files content, without worrying other matching criteria. It would be useful, for example, when two identical
MP3 tracks or video files
have different names
http://www.Auslogics.com/en/software/duplicate-file-Finder

Easy Duplicate Finder - find and delete the duplicate - free
http://www.easyduplicatefinder.com/

AntiTwin - Installer and Portable versions - search files in double or similar-
same binary - free
http://www.Joerg-Rosenthal.com/en/antitwin/

Fast Duplicate File Finder-Free - quickly find all the files in a folder and its subfolders duplicate
http://www.Mindgems.com/products/fast-duplicate-file-Finder/fast-duplicate-file-Finder-about.htm

Duplicate File Finder - Smart Port Forwarding - TCP Port Scanner - TCP Tunnel Port-
Multi-minuterie-free
http://www.brooksyounce.com/

Duplicate File Finder software (pictures, mp3, iTunes)
http://www.Moleskinsoft.com/

SearchMyFiles - free - an alternative to the "Search for files and folders" module standard
Windows. It allows you to easily search files in your system by wildcard, by last modification/creation/last accessed: time, by file attributes, by the content of a file (text or binary search),
and by the size of the file. SearchMyFiles allows you to make a very specific search that cannot be
done with Windows search.
http://www.NirSoft.NET/utils/search_my_files.html

I hope this helps.

Rob Brown - Microsoft MVP<- profile="" -="" windows="" experience :="" bicycle="" -="" mark="" twain="" said="" it="">

How did the keyboard set on the baseplate on Satellite C855-1TD

C855-1TD model *.

How did the keyboard attached to the base plate?
There is not any screws holding it down. Is it just stuck to the plate?

Thank you

It s a bit complicated on this model of laptop. I just hope you won't damage anything.
Before you remove the keyboard, you must remove the optical disk drive. When ODD is deleted, you must use a plastic stick to push the back of the keyboard of the ODD housing slot. Push the keyboard until the corner rises on the upper surface of the case.
After doing this a slice of plastic lever allows to insert between the keyboard and top box, carefully lift the edges of the keyboard until all locks are unlocked.

* Be careful and all you are doing is on your own risk.*

Laptop bought with windows vista installed, the hard drive was completely cleaned and windows 7 installed, I have to uninstall it and install a genuine windows xp pro - how do this please.

Laptop bought with windows vista installed, the hard drive was completely cleaned and windows 7 installed, I have to uninstall it and install a genuine windows xp pro - how do this please.

On Sunday July 25, 2010 10:11:30 + 0000, pc_novice wrote:

Hi Gordon

I just downloaded drivers from the Dell website in support of xp

I have tried to reboot from the XP cd but got the following message when I tried to install

"This program is blocked due to compatibility issues"

Program - the installer of Windows

Editor - Microsoft

Location: D:\1386\winnt32.exe

Setup cannot continue because the version of Windows on your computer is newer than the version on the cd. If you decide to remove the version latest Windows that is currently installed the files and settings cannot be recovered"

I don't want Windows 7 at all so I'm ready to lose all data, so how can I do to remove it?

You say that you have started from the XP CD, but something is wrong with that
you do. Just boot from the CD and follow the prompts for a
clean install. A new installation by formatting the
drive and does not care what version of Windows is installed (or
even if any version of Windows is installed.

Ken Blake

Password reset the role on the same server as Secure Access?

It is safe to add the role of reset of password on the same server as Secure Access? We have our server configuration to secure access for the Web and AppPortal access.

After you install the role of reset of password on the access to the Web server, I discovered they don't work together. Password service would not start and installing beat all the Web site on the server.

Clock on windows 8 is wrong time, I tried to set the time of the internet but its still not working, think theres a bug in the clock time, anyone have the same problem for windows 8 and know how to fix?

Clock on windows 8 is wrong time, I tried to set the time of the internet but its still not working, think theres a bug in the clock time, anyone have the same problem for windows 8 and know how to fix?

It sets obtained :-) Sorry for the delay

Thank you very much! has worked perfectly!

After you change the raw file in CS6, jpeg looks dull and has weird tinge to it. I tried all color adjustments, but the result is the same throughout, jpegs of LR5 and 13 elements looks nice and consistent. How can I fix it?

After you change the raw file in CS6, jpeg looks dull and has weird tinge to it. I tried all color adjustments, but the result is the same throughout, jpegs of LR5 and 13 elements looks nice and consistent. How can I fix it?

Make sure the jpg has embedded sRGB profile.

In what application you view jpg files?

The symptoms you describe are typical of images with Adobe RGB or ProPhoto read in an application that does not support color management.

My one year contract is about to expire. Can I extend the same price for two months and cancel the contract without redoing the accession of another full year?

My one year contract is about to expire. Can I extend the same price for two months and cancel the contract without redoing the accession of another full year?

Hello

The plan of photography is an annual plan therefore would renew for another 12 months.

Under the terms of subscription, an early termination fee would be applied if you have decided to cancel two months in the new contract - Adobe - General conditions of subscription

Fill the cloud creative and plans unique app are available on a monthly basis, which can be another option - https://creative.adobe.com/plans

Kind regards

Bev

I am a member creative cloud. I want to install the same applications from my laptop to my new desktop computer. I need to purchase another license? otherwise how do the same thing for my new desktop computer

I am a member creative cloud. I want to install the same applications from my laptop to my new desktop computer. I need to purchase another license? otherwise how do the same thing for my new desktop computer

I have it! Thank you

Everytime I try to download the Adobe installer that's fine 95% full, and then it will say "launch creative Cloud" and then it will freeze. I tried to restart the download as Adobe said, and he did the same thing. Any tips to help me?

Everytime I try to download the Adobe installer that's fine 95% full, and then it will say "launch creative Cloud" and then it will freeze. I tried to restart the download as Adobe said, and he did the same thing. Any tips to help me?

Uninstall anything cc which can be installed.

clean a http://www.adobe.com/support/contact/cscleanertool.html

then install the application of cc, Download Adobe Creative Cloud apps desktop | CC free trial Adobe

How can I use the same ebook on my PC and the android device. I use the same ID of ADE

can I use the same ebook on my PC and the android device. I use the same ID of ADE
can I use the same ebook on my PC and the android device. I use the same ID of ADE

Its not automatic download. At the moment seems to only work for devices Mobile for the version of office for the epub files. If you want the same eBook on different devices, you need to download on all devices, or move the file to the file system after connect your phone to your device.

Vista Home Premium gives the message "linked to limited accessibility" and I cannot access the internet.

I have Vista Home Premium and trying to connect to a WiFi spot, I get the message "linked to limited accessibility" and I cannot access the internet. I understand this is common for Vista and there is a fix for this problem, but want to make sure that I get the right one and can't seem to find anything referring to this issue on the Microsoft site

Hello

This problem happens only when connecting to a particular place for the WiFi?

You can follow the suggestions and check out them.

Method 1

You can read the article.

Message when a device on a Windows Vista-based computer uses a network bridge to access the network: "connected with limited access".

http://support.Microsoft.com/kb/930517

Method 2

Disable IPv6.

Try to uninstall IPv6 on all interfaces, the removal of virtual cards of IPv6 and reset the TCP/IP stack. To remove the IPv6, go to the properties for each network adapter, and deselect the check box next to the Protocol "Internet Protocol version 6 (TCP/IPv6), which will turn off, or select it and click on uninstall, which withdraw power off the computer.» Then go into Device Manager and remove any 4to6 adapters, adapters miniport WUN or tunnel adapters.

NOTE: You should do this for each network connection.

Method 3

Temporary disable your security software.

Disable the antivirus software

http://Windows.Microsoft.com/en-us/Windows-Vista/disable-antivirus-software

Enable or disable Windows Firewall

http://Windows.Microsoft.com/en-us/Windows-Vista/turn-Windows-Firewall-on-or-off

Note: Software antivirus and firewall can help protect your computer against viruses and other security threats. In most cases, you should not disable your antivirus software. If you do not disable temporarily to install other software, you must reactivate as soon as you are finished. If you are connected to the Internet or a network during the time that your antivirus software is disabled, your computer is vulnerable to attack.

Method 4

You can reset the TCP/IP stack.

How to reset the Protocol Internet (TCP/IP)

http://support.Microsoft.com/kb/299357

Is it possible to use the same license on my PC and my laptop?

Hello
I have a PC where I installed Adobe cloud (CC PS and LR CC) and I bought a laptop now.
Is it possible to use the same license on my PC and my laptop? I have Yes, how do I use it?
Thank you
Erdogan

Yes. Your license allows you to have two signed in facilities as long as you only use one at a time for the subscription. Install the desktop application on the second computer, connect and install the applications.

I have two versions of the same book on my iphone and ipad. I want the same book, so I can study on each device. I tried to remove the books and start again. It does not work. Help.

I have two versions of the same book on my iphone and ipad, which are not synchronized with the other. I want the same book on each device, so I can study on one or the other. I tried to remove the books on my phone, ipad & itunes and start again. It does not work. Help.

Hello david.hogan87,

Thanks for posting about what is happening. If I understand you correctly, you have a book you want on your iPhone and iPad, but neither is synchronizing correctly to have both.

Have you checked every device to confirm that the same identifier Apple is signed all three?

iPhone and iPad: head to settings > iTunes and App Store

iTunes: on a Mac, it's under account or installed depending on the version of iTunes store. On a PC, it is also under account, and if you don't see the menu bar, click on the triangle in the upper left corner to view the Bar Menu or CTRL + B on the keyboard.

If all 3 have the same signed Apple ID, post the version of iOS and iTunes for all three devices here, please.

Best regards.

How did the same predicate is completed access and filter?

Similar Questions

Maybe you are looking for