Primary key index not working in a select statment

Hi ,
I'm doing a :
select *
from my_table
where B = v1 and
A = v2 ;
where A and B are the primary key of the table, in that table the primary key index is there and the order of the primary key definition is A first and then B.
While testing this statment in my database the Explain Plan shows that it is using the index ok but when
runninng in client database it is not using it becasue of the order (i think), is this something configurable that I need to ask to my DBA ?
The solution I found was to do the select with a hint wich fix the problem , but I'm curious about why is working in my dadabase and not in the client database
thanks in advance .
oracle version 11g

This is the forum for SQL Developer (Not for general SQL/PLSQL questions). Your question would be better asked in the SQL and PL/SQL forum.
Short answer: The execution plan used will depend on optimizer settings and table/index statistics. For example if the table has very few rows it may not bother using the index.

Similar Messages

The Control A key is not working. I cannot multi-select my songs. I'm not sure if it is the problem with iTunes 10.6.1.7 or my PC settings encounter issues. Also, i cannot find Album Artwork online using iTunes and i cannot select any view form but List.

The Control A key is not working. I cannot multi-select my songs. I'm not sure if it is the problem with iTunes 10.6.1.7 or my PC settings encounter issues. Also, i cannot find Album Artwork online using iTunes and i cannot select any view form but List.

The Control A key is not working. I cannot multi-select my songs. I'm not sure if it is the problem with iTunes 10.6.1.7 or my PC settings encounter issues. Also, i cannot find Album Artwork online using iTunes and i cannot select any view form but List.

The Enter Key does not work in the location bar; I have to manually select the "Go To" icon since upgrading to Version 10.

I just upgraded to Firefox 10. When I manually enter a URL into the location bar, the "Go To" arrow does not have focus, so the Enter Key will not work. I have to manually select the "Go To" arrow to navigate. Any suggestions?

This could be the AVG safe search extension. If you have that installed, try disabling it. Instructions here: [[Using extensions with Firefox#w_how-to-disable-or-remove-extensions]]

How to see wether the index is a primary key index or not

hi,
can anybody let me know how to get wether the index is made on the primary key (i.e primary key index)
can we do by querying the user_constriants table.
plz let me know..

Maran.Viswarayar wrote:
Vijay,
Was that different from Anurag's reply?Yes it was. Anurag didn't include the index_name in his query.
It is possible for the index name to be different from the constraint_name, so if you listed just the primary key constraint names you might decide that a given index was not a "primary key" index because you couldn't find a constraint with the matching name.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk
To post code, statspack/AWR report, execution plans or trace files, start and end the section with the tag {noformat}{noformat} (lowercase, curly brackets, no spaces) so that the text appears in fixed format.
"Science is more than a body of knowledge; it is a way of thinking"
Carl Sagan

Null in Composite Primary Key and "Primary keys must not contain null"

Hello all.
I'm a newbie concerning to JPA/EJB3, but I was wondering if toplinks doesn't support composite primary keys with null in some field (something perfectly right in any RDBMS).
I used JDeveloper (I'm using Oracle 10g database and JDeveloper 10.1.3.2.) wizards to generate JPA classes and I checked out generated files (with annotations), so they should be right (by the way, other O-R mappings for my model are working right, but this one).
I'm getting the next error:
Exception Description: The primary key read from the row [DatabaseRecord(
     TSUBGRUPOSLDI.CD_GRUP => 01
     TSUBGRUPOSLDI.CD_SUBGRUP => null
     TSUBGRUPOSLDI.CG_POBL => 058
     TSUBGRUPOSLDI.CG_PROV => 28
     TSUBGRUPOSLDI.DSCR => Sanidad)] during the execution of the query was detected to be null. Primary keys must not contain null.
Compound primary key is (CD_GRUP, CD_SUBGRUP). No foreign keys, no joins (only a NamedQuery: "select o from ..."). It's the simplest case!
I checked out that everything runs ok if there's no "null" value in CD_SUBGRUP.
After some research (this and other forums) I'm beginning to believe that it's not supported, but not sure.
Am I doing sth wrong? If not, what is the reason to not support this? Will it be supported in the future?
Thanks in advance.

Null is a special value and in many databases is not comparable to another null value (hence the isNull operator) and may pose problems when used to uniquely identify an Entity. TopLink does not support null values within a composite PK. As the nullable column is most likely not designated as a PK within your database table (many databases do not allow this) I recommend updating the Entity PKs to match that of the database.
--Gordon

Oh.. Primary key index is missing!

Database: 10.2.0.4.0
Platform : Linux
SQL> SELECT CONSTRAINT_NAME,CONSTRAINT_TYPE,INDEX_NAME FROM DBA_CONSTRAINTS WHER
E TABLE_NAME='ISSUE_COMMENTS';
CONSTRAINT_NAME C STATUS VALIDATED
SYS_C0031516 C ENABLED VALIDATED
SYS_C0031517 C ENABLED VALIDATED
SYS_C0031519 P ENABLED VALIDATED
SQL> SELECT INDEX_NAME,TABLE_NAME FROM DBA_INDEXES WHERE TABLE_NAME='ISSUE_COMMENTS';
INDEX_NAME TABLE_NAME
INDEX_ISSUE_COMMENTS ISSUE_COMMENTS
SQL> select distinct index_name,column_name,table_name from dba_ind_columns wher
e table_name in ('ISSUE_COMMENTS');
INDEX_NAME COLUMN_NAME TABLE_NAME
INDEX_ISSUE_COMMENTS IDX ISSUE_COMMENTS
INDEX_ISSUE_COMMENTS ISSUE_ID ISSUE_COMMENTS
INDEX_ISSUE_COMMENTS PARENT_ID ISSUE_COMMENTS
Where is the index for the primary key 'SYS_C0031519'?
SQL>
After droping and recreating the primary key also,just primary constrainy is created but there is no corresponding index.
SQL> ALTER TABLE ISSUE_COMMENTS DROP CONSTRAINT SYS_C0031519;
Table altered.
SQL> ALTER TABLE ISSUE_COMMENTS ADD PRIMARY KEY (IDX)
2 USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS
3 STORAGE(INITIAL 32768 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
4 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
5 TABLESPACE "TABLE_DATA" ENABLE;
Table altered.
SQL> SELECT CONSTRAINT_NAME,CONSTRAINT_TYPE,status,validated FROM DBA_CONSTRAINT
S WHERE TABLE_NAME='ISSUE_COMMENTS';
CONSTRAINT_NAME C STATUS VALIDATED
SYS_C0031516 C ENABLED VALIDATED
SYS_C0031517 C ENABLED VALIDATED
SYS_C0034310 P ENABLED VALIDATED
SQL> SELECT INDEX_NAME,TABLE_NAME FROM DBA_INDEXES WHERE TABLE_NAME='ISSUE_COMMENTS';
INDEX_NAME TABLE_NAME
INDEX_ISSUE_COMMENTS ISSUE_COMMENTS
SQL> select distinct index_name,column_name,table_name from dba_ind_columns wher
e table_name in ('ISSUE_COMMENTS');
INDEX_NAME COLUMN_NAME TABLE_NAME
INDEX_ISSUE_COMMENTS IDX ISSUE_COMMENTS
INDEX_ISSUE_COMMENTS ISSUE_ID ISSUE_COMMENTS
INDEX_ISSUE_COMMENTS PARENT_ID ISSUE_COMMENTS
Here also, the primary key constraint SYS_C0034310 is available but there is no index for that primary key.
Where the primary index has gone?

MohanaKrishnan wrote:
Database: 10.2.0.4.0
Platform : Linux
SQL> SELECT CONSTRAINT_NAME,CONSTRAINT_TYPE,INDEX_NAME FROM DBA_CONSTRAINTS WHER
E TABLE_NAME='ISSUE_COMMENTS';
CONSTRAINT_NAME C STATUS VALIDATED
SYS_C0031516 C ENABLED VALIDATED
SYS_C0031517 C ENABLED VALIDATED
SYS_C0031519 P ENABLED VALIDATED
Your first query is not consistent with the first set of results you have displayed.
Your later query for index columns is also not very helpful as it won't list the column names in the right order.
The probably answer to your question is that the index you have is non-unique and starts with the column you've used for the primary key, which means Oracle can use it to support the primary key constraint. Here's a quick cut-n-paste from a SQL*Plus session to demonstrate the point:
SQL> create table t1 (n1 number, v1 varchar2(10));
Table created.
SQL> create index t1_n1 on t1(n1);
Index created.
SQL> alter table t1 add primary key(n1);
Table altered.
SQL> select index_name from user_indexes where table_name = 'T1';
INDEX_NAME
T1_N1
1 row selected.
SQL> select constraint_name, constraint_type, index_name from user_constraints
2 where table_name = 'T1';
CONSTRAINT_NAME C INDEX_NAME
SYS_C0033465 P T1_N1
1 row selected.
SQL> spool offNote how I've added a primary key with no name, and Oracle has decided to use the t1_n1 index to support it.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk
"Science is more than a body of knowledge; it is a way of thinking" Carl Sagan
Edited by: Jonathan Lewis on Dec 31, 2008 2:16 PM
Apologies to Satish - I didn't see either prior post

Named query, primary keys must not contain null

We have an question on the named query. Here is the scenario:
Class JoinClassC (id, name, desc, comment) is mapped to two tables Join_Table_A (id, name, description) and Join_Table_B (id, name, comments); Join_Table_A is the primary table; two tables are associated via primary key.
Defined a named query (findByName, ReadAllQuery/SQL) for JoinClassC descriptor. The sql is:
SELECT a.ID,a.NAME,a.DESCRIPTION,b.COMMENTS FROM JOIN_TABLE_A a, JOIN_TABLE_B b WHERE a.NAME=#name AND a.ID=b.ID AND a.NAME=b.NAME
Getting QueryException while executing the query. Here is the trace:
[3/2/05 13:50:24:795 EST] f8b62aa SystemOut O 2005.03.02 01:50:24.795--ServerSession(738697921)--Thread[Servlet.Engine.Transports : 4,5,main]--Connection(1095574161)--SELECT a.ID,a.NAME,a.DESCRIPTION,b.COMMENTS FROM JOIN_TABLE_A a, JOIN_TABLE_B b WHERE a.NAME='persistence' AND a.ID=b.ID AND a.NAME=b.NAME
2005.03.02 01:50:24.835--ClientSession(1127670417)--Thread[Servlet.Engine.Transports : 4,5,main]--Exception [TOPLINK-6044] (OracleAS TopLink - 10g (9.0.4.4) (Build 040627)): oracle.toplink.exceptions.QueryException
Exception Description: The primary key read from the row [DatabaseRow(
     USER04.JOIN_TABLE_B.ID => 2
     USER04.JOIN_TABLE_A.NAME => persistence
     USER04.JOIN_TABLE_A.DESCRIPTION => FJF Persistence Fram
     USER04.JOIN_TABLE_B.COMMENTS => The Persistence Fram)] during the execution of the query was detected to be null. Primary keys must not contain null.
Query: ReadAllQuery(com.ford.it.persistence.unittest.dom.JoinClassC)Local Exception Stack:
Exception [TOPLINK-6044] (OracleAS TopLink - 10g (9.0.4.4) (Build 040627)): oracle.toplink.exceptions.QueryException
Exception Description: The primary key read from the row [DatabaseRow(
     USER04.JOIN_TABLE_B.ID => 2
     USER04.JOIN_TABLE_A.NAME => persistence
     USER04.JOIN_TABLE_A.DESCRIPTION => FJF Persistence Fram
     USER04.JOIN_TABLE_B.COMMENTS => The Persistence Fram)] during the execution of the query was detected to be null. Primary keys must not contain null.
Query: ReadAllQuery(com.ford.it.persistence.unittest.dom.JoinClassC)
     at oracle.toplink.exceptions.QueryException.nullPrimaryKeyInBuildingObject(QueryException.java:542)
Adding b.ID to the sql select will solve the problem.
Question: does the primary key must be present in the sql select to run this kind of query? Any way to work around the restriction?
Your help would be greatly appreciated.
Haiwei

The problem is that you need to select both primary keys for the multiple table descriptor.
i.e.
SELECT a.ID,a.NAME,a.DESCRIPTION,b.ID, b.COMMENTS FROM JOIN_TABLE_A a, JOIN_TABLE_B b WHERE a.NAME=#name AND a.ID=b.ID AND a.NAME=b.NAME
Your SQL needs to return the same data that TopLink would have selected, which includes the primary key for both tables. TopLink expects both a.ID and b.ID fields in the select, because your only select one and the field names are the same TopLink thought the ID field was for b.ID not a.ID, if you select both it will be ok.

Concept about Primary Key index

I have a partitioned table as follow:
CREATE TABLE TEST
(TEST_KEY NUMBER(10,0) NOT NULL
,FOREIGN_KEY NUMBER(10,0) NOT NULL
,PARAM_ID NUMBER(10,0)
,PARAM_VALUE VARCHAR2(256)
PARTITION BY HASH (operation_key) PARTITIONS 15
STORE IN (TEST_R1_TS, TEST_R2_TS, TEST_R3_TS, TEST_R4_TS, TEST_R5_TS)
CACHE
I also created a partitioned index for the TEST_KEY to be used as primary key index.
CREATE INDEX TEST_PK_IDX ON PARAMETER_1(TEST_KEY) LOCAL
STORE IN (TEST_i1_ts, TEST_i2_ts, TEST_i3_ts, TEST_i4_ts, TEST_i5_ts);
When I try to run alter table to add primary key, I got index not exist error?
SQL> alter table TEST add (constraint test_pk primary key (test_key) using index test_pk_idx);
alter table parameter_1 add (constraint pa1_pk primary key (parameter_key) using index pa_pk_idx)
ERROR at line 1:
ORA-01418: specified index does not exist
BUT, I could find my index in the USER_INDEXES table...
SQL> select index_name from user_indexes where index_name like '%TEST_PK%';
INDEX_NAME
TEST_PK_IDX
Why? Help is very appreciated.
Thank you in advanced.

check the names of the tables in the script you give ... they are different for the table and the index. When you add the constraint the table name and column name mysteriously change in the error message, so I think that you aren't showing us what actually happened.

Problems creating a partitioned primary key index.

I am creating a partitioned table and I noticed that when I use the constraint option of the create table the primary key is not partitioned. I then tried using the using index clause and specifying the create index local and that is giving errors. Here is my current syntax that is causing the errors:
create table redef_temp (
     USER_ID          VARCHAR2(32),
     GROUP_ID     VARCHAR2(32),
     JOIN_DATE     DATE DEFAULT SYSDATE NOT NULL,
     constraint primary key
     using index (create index pk_redef_temp
on redef_temp (USER_ID, GROUP_ID)
LOCAL STORE IN (IDX)))
tablespace data
partition by hash (user_id)
     (PARTITION ic_x_user_group_part_p1 tablespace DATA,
     PARTITION ic_x_user_group_part_p2 tablespace DATA,
     PARTITION ic_x_user_group_part_p3 tablespace DATA,
     PARTITION ic_x_user_group_part_p4 tablespace DATA)
PARALLEL ENABLE ROW MOVEMENT;
Thanks

The following works on 9.2.0.8 and 10.2.0.3:
create table redef_temp (
     USER_ID VARCHAR2(32),
     GROUP_ID VARCHAR2(32),
     JOIN_DATE DATE DEFAULT SYSDATE NOT NULL,
     constraint pk_redef_temp primary key (user_id, group_id)
     using index (
          create index pk_redef_temp
          on redef_temp (USER_ID, GROUP_ID)
          LOCAL tablespace test_8k
tablespace test_8k
partition by hash (user_id) (
     PARTITION ic_x_user_group_part_p1 tablespace test_8k,
     PARTITION ic_x_user_group_part_p2 tablespace test_8k,
     PARTITION ic_x_user_group_part_p3 tablespace test_8k,
     PARTITION ic_x_user_group_part_p4 tablespace test_8k
PARALLEL ENABLE ROW MOVEMENT
/Your syntax for the constraint definition was wrong, and your use of 'store in' for the index tablespace was wrong. I've had to change all tablespace names to 'test_8k'.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk

Modifer keys do not work with mouse in Illustrator

Below is a copy of a bug report I just submitted to Adobe. I don't suppose any users have run across this and found a solution or workaround?
I found someone else with this problem in an archived topic thread, but the only response that poor fellow got was an accusation of not following instructions (His problem wasn't user error, BTW).
Thanks
******BUG******
Concise problem statement:
Modifer keys do not work with mouse: For example, free transform or rotate behaviors that require "Click-Ctrl" .
Steps to reproduce bug:
1. select object
2. select free transform tool
3. left click (without releasing) a corner of the bounding box.
4. start dragging
5. press ctrl
Results:
object behaves as though the ctrl key was not pressed. i.e. the cursor does not change shape and the object scales rather than distorts.
Expected results: The cursor should change shape as the ctrl key is pressed and the object should distort rather than scale.
Additional information: This behavior is intermittent. Occasionally Illustrator recognizes the "Click-Ctrl" combination and behaves exactly as the help file predicts it will. The cursor changes shape and the object distorts rather than scales. I can offer no rhyme or reason for when Illustrator will behave as advertised and when it will ignore the modifier keys.
The example above involves the free transform tool, but the problem occurs just as often with other tool behaviors that require a modifier key + mouse combination.
Primarily using Wacom Intuos3 tablet. (with latest drivers), but have also tried combinations with microsoft mouse or both mice installed.
Also, immediately after an occurrence Illustrator bug, left AI open, went to a different app that uses mouse+modifier (Ctrl+Click). That different app recognizes Ctrl+Click with no problems whatsoever.

Thanks Guys,
Good to know it's working for you. I guess that's the nature of intermittent bugs. Of course, Adobe's bug report form has a field for version, which I, of course, filled in. Sorry I didn't add it to this post. I'm using the latest version CS3 v13.0.2.
Stephen,
Sorry I was not more clear when I said, "For example, ...". I was talking about the modifier keys not working with several different tools. The Free Transform tool advertises functionality that is supposed to work with a "Click (down, but don't release)then hold down Ctrl" combination. The Rotate tool advertises a behavior that is supposed to work with an "Alt-Click" combination. These are just 2 examples of the modifier keys not working. I focused primarily on one example in the bug report(ctrl after and in addition to click in the free transform tool, not alt-click in the rotate tool).
Here is what I expect(quoted from Adobe's CS3 help file)
(From the "Distort Objects with the Free transform tool" help topic)
"Select one or more objects.
Select the Free Transform tool .
Start dragging a corner handle on the bounding box (not a side handle), and then do one of the following:
Hold down Ctrl (Windows) or Command (Mac OS) until the selection is at the desired level of distortion.
Hold down Shift+Alt+Ctrl (Windows) or Shift+Option+Command (Mac OS) to distort in perspective."
(from the "Rotate an object by a specific angle" help topic:)
You can control the exact angle of rotation with the Rotate command.
Select one or more objects.
"Do one of the following:
To rotate around the center point, choose Object > Transform > Rotate, or double-click the Rotate tool.
To rotate around a different reference point, select the Rotate tool. Then Alt‑click (Windows) or Option‑click (Mac OS) where you want the reference point to be in the document window.
Enter the rotation angle in the Angle text box...."
These Tool based mouse-key combinations do occasionally work as they are supposed to, so I know what the expected results are supposed to look like, but whether they work or not appears to depend on the phase of the moon, the day of the week, and the color of the president's underwear.
Other non-tool based mouse-key combinations in Illustrator work consistently all the time - Ctrl-A for Select All as just one example that always works.
Thanks Again

My laptop keyboard is having problems. I took it if to change my bottom case it worked fine prior and then after just the power key worked. I cleaned everything nothing is bent in the cable. now my power key is not working

Hi my keyboard is not working I took off the bottom case to change it prior my keyboard was fine and after just the power key worked. I checked everything no portions were bent and it plugged in good. I tried to turn it on this morning and now the power key doors not work??

Back up all data.
Triple-click anywhere in the line below to select it:
pmset -g assertions
Copy the selected text to the Clipboard (command-C).
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V).
Post any lines of output that appear below what you entered — the text, please, not a screenshot.

The enter key is not working in firefox but it has working fine in chrome and IE so please help me to rid out from this.

The enter key is not working in firefox but it has working fine in chrome and IE so please help me to rid out from this.

Hello gokulaan, '''try Firefox Safe Mode''' to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.
''(If you're not using it, switch to the Default theme.)''
* You can open Firefox 4.0+ in Safe Mode by holding the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* Or open the Help menu and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
''Once you get the pop-up, just select "'Start in Safe Mode"''
'''''If the issue is not present in Firefox Safe Mode''''', your problem is probably caused by an extension, and you need to figure out which one. Please follow the [[Troubleshooting extensions and themes]] article for that.
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
''When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.''
Thank you.

Keyboard keys are not working

Im on mac OS X 10.6.8 several keyboard keys are not working. For instance the at symbol is not working or question mark and random other punctuation keys. The problem started after running some code from terminal to trun off mouse acceleration and then installing a plug-in to control more accurately the mouse funtions. Ive since uninstalled the plug in and disabled the adjustment in terminal. Ive checked all the normal keyboard funcions to make sure settings were not funky. When I log out and log in as a differnt user the problem with the keyboard is fixed. Someone please help
Code I ran
defaults write .GlobalPreferences com.apple.mouse.scaling -1
http://www.lockergnome.com/osx/2011/07/13/how-to-turn-off-mouse-acceleration-in- os-x/

Hello lindzthecreator,
I suggest this part of the article named One or more keys on the keyboard do not respond found here http://support.apple.com/kb/ts1381
Some keys don't work as expected
From the Apple menu, choose System Preferences.
From the View menu, choose Speech.
Click the Text to Speech tab.
If "Speak selected text when the key is pressed" is enabled, the key or key combination set to speak text cannot be used for other purposes or used to type text--click Set Key and change it to a less-commonly used key combination (try to use modifier keys such as Shift, Command, Option, and Control). Or, disable the "Speak selected text when the key is pressed" option.
Click the Universal Access pane in System Preferences, click the Keyboard tab.
Make sure that Slow Keys is turned off. With Slow Keys on, you need to press a key for a longer period of time for it to be recognized.
In the Universal Access pane, click the Mouse tab, and make sure Mouse Keys is turned off. With Mouse Keys enabled, you cannot use the Numeric Keypad to enter numbers--instead the keypad moves the pointer (cursor). (There is an option to enable Mouse Keys with five presses of the Option key; you may want to turn that option off to avoid accidentally enabling it.) If Mouse Keys is enabled and you are using a keyboard with no numeric keypad or Num Lock function, see Unable to type while Mouse Keys is enabled in Mac OS X.
If the function keys on the top row of the keyboard are not working as expected, see Mac OS X: How to change the behavior of function keys.
If the issue persists, use Keyboard Viewer to help isolate the issue:
Click the Language & Text pane (Mac OS X v10.6) or International pane (Mac OS X v10.5.8 or earlier) in System Preferences.
Click the Input Sources tab (or Input Menu tab in Mac OS X 10.5.8 or earlier).
Click the Keyboard & Character Viewer "On" checkbox to select it (click the Keyboard Viewer "On" checkbox in Mac OS X 10.5.8 or earlier).
From the Input (flag) menu, choose Show Keyboard Viewer.
If the keyboard is connected and detected by Mac OS X, the keys you type will highlight in the Keyboard Viewer window. Open TextEdit (or any text application), and try to type something using the keys that were previously not responding to see if they highlight in Keyboard Viewer.
Start from the Mac OS X Install Disc, choose Terminal from the Utilities menu and test the keys which were previously not working. If the keys work while started from the Install disc, then the keyboard itself is working correctly. Use Mac OS X: How to troubleshoot a software issue to isolate the software issue that may be causing the keys to not respond.
All the very best,
Sterling

Some Keys are not working on Lenovo G570

Hello all
I am new here, looking for some help regarding my Lenovo G570.
Yesterday, it was working perfectly, I properly shut is down. I have set a BIOS pasword.
Today, when I switch it on, I was unable to type the pasword becasu some keys were not working. However, I managed to loged in with the help of On Screen Keyboard. After analysing it, I came to know that some keys on numpad includeing 0,2 and on the 2nd line(vertical numerical keys) 1,2,3,4,7,8,9,0 are not working. I tried to re-install the OS but I set a BIOS paswoed containing one of the missing keys.
Please let me know whether it is a software problem or should i take my laptop to some repairing shop?
Thanks
Solved!
Go to Solution.

Hi Asadkhan92,
Welcome to Lenovo Community!
As per the query we understood that you are facing an issue with the keyboard in your Lenovo G570 laptop.
As you have mentioned that the some keys are not working in your laptop, as you have also mentioned that the onscreen keyboard is working, please connect the external keyboard and check for the issue, this is to confirm if the issue with the hardware or software.
If the external keyboard works fine and if the keypad is not working then it’s a issue with the keypad of the laptop.
Please visit the nearest service centre for further details.
Click here to open a link where you can select the country and get the exact contact support number. I’m sure they will be a great help.
Hope this helps!
Best regards,
Ashwin.S
Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
Follow @LenovoForums on Twitter!

"backspace", "g" and "h" keys are not working.

hello,
my laptop is HP 450 and windows 7.it is one years old. i haven't spilled anyting on it or damaed it in anyway i can think of.
suddenly the "backspace" , "g" and " h " keys are not working.
please help me, because i have to complete my university assignment as soon as possible.
tank you,
shehara

Hi,
While this could be a hardware issue, it's always worth trying the following.
Open windows Control Panel, open Device Manager, expand Keyboards, right click the entry 'Standard PS/2 Keyboard' and select Uninstall.
Shutdown the notebook.
Then unplug the AC Adapter and then remove the battery. Hold down the Power button for 30 seconds. Re-insert the battery and plug in the AC Adapter.
Tap away at the esc key as you start the notebook to launch the Start-up Menu and then select f10 to enter the bios menu. Press f9 to load the defaults ( this is sometimes f5, but the menu at the bottom will show the correct key ), use the arrow keys to select 'Yes' and hit enter. Press f10 to save the setting and again use the arrow keys to select 'Yes' and hit enter.
Regards,
DP-K
****Click the White thumb to say thanks****
****Please mark Accept As Solution if it solves your problem****
****I don't work for HP****
Microsoft MVP - Windows Experience

Primary key index not working in a select statment

Similar Messages

Maybe you are looking for