Maximum index key length exceeded

Hi,
I am getting following error on executing this command in MS SQL server 2012-
Command -
alter table <table1_name> add constraint <constraint name> foreign key (<column1 name>) references <table2_name>(<column2_name>)
Error -
System Error: #1400025: Maximum index key length exceeded
Warning: #1500562: Index will apply to all business objects
Any suggestion on what I can check in this case?
Thanks.

alter table <table1_name> add constraint <constraint name> foreign key (<column1 name>) references <table2_name>(<column2_name>)
Error -
System Error: #1400025: Maximum index key length exceeded
Warning: #1500562: Index will apply to all business objects
Any suggestion on what I can check in this case?
This is not a SQL Server error. What tool are you using? If you are using SSMS, maybe a DDL trigger?
Dan Guzman, SQL Server MVP, http://www.dbdelta.com

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[b]ORA-01450: maximum key length exceeded[/b]

Hi I get this error when trying to migrate MS Access 2000 to Oracle. I get this error on foreign key and primary keys saying that the maximum key length has been exceeded.
What does this mean and how can I fix it? Can anyone help?
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Maximum key length also depends on tablespace block size. It seems that your value (1942) may be for 2K blocks.
At least for my 10.2.0.1.0 on Windoze it takes
1478 for 2k tablespace
3118 for 4k tablespace
6398 for 8k tablespace
If you have 2K blocks I'd say it is somewhat rather small blocks, I'd normally use 8K blocks.
So if you have possibility (have at least version 9, probably 9.2 don't know exactly) to create tablespaces with non default blocksize then as a temporal solution you can create tablespace with larger blocksize and create index in it.
Of course so you have to allocate also some memory for these blocksizes and so divide your memory in possibly less utilized pieces.
See example for my 8k default blocksize test DB:
SQL> create table v (a varchar2(4000), b varchar2(4000), c varchar2(4000));
Table created.
SQL> insert into v values (lpad('a', 4000, 'a'), null, null);
1 row created.
SQL> create index vidx on v (a, b, c);
create index vidx on v (a, b, c)
ERROR at line 1:
ORA-01450: maximum key length (6398) exceeded
SQL> alter system set db_16k_cache_size = 10240;
System altered.
SQL> create tablespace big datafile 'big.dbf' size 10 m blocksize 16k;
Tablespace created.
SQL> create index vidx on v (a, b, c) tablespace big;
Index created.
Gints Plivna
http://www.gplivna.eu
Message was edited by:
gintsp
Of course inserting a row was completely unnecessary :)

ConfigMgr Certificate Support Clarification: CAs with 4096-bit RSA Key Lengths

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ORA 01450 : maximum key length (1942) exceeded

hI all,
i got that message when try to create index.
ORA 01450 : maximum key length (1942) exceeded
Regards,

Maximum key length also depends on tablespace block size. It seems that your value (1942) may be for 2K blocks.
At least for my 10.2.0.1.0 on Windoze it takes
1478 for 2k tablespace
3118 for 4k tablespace
6398 for 8k tablespace
If you have 2K blocks I'd say it is somewhat rather small blocks, I'd normally use 8K blocks.
So if you have possibility (have at least version 9, probably 9.2 don't know exactly) to create tablespaces with non default blocksize then as a temporal solution you can create tablespace with larger blocksize and create index in it.
Of course so you have to allocate also some memory for these blocksizes and so divide your memory in possibly less utilized pieces.
See example for my 8k default blocksize test DB:
SQL> create table v (a varchar2(4000), b varchar2(4000), c varchar2(4000));
Table created.
SQL> insert into v values (lpad('a', 4000, 'a'), null, null);
1 row created.
SQL> create index vidx on v (a, b, c);
create index vidx on v (a, b, c)
ERROR at line 1:
ORA-01450: maximum key length (6398) exceeded
SQL> alter system set db_16k_cache_size = 10240;
System altered.
SQL> create tablespace big datafile 'big.dbf' size 10 m blocksize 16k;
Tablespace created.
SQL> create index vidx on v (a, b, c) tablespace big;
Index created.
Gints Plivna
http://www.gplivna.eu
Message was edited by:
gintsp
Of course inserting a row was completely unnecessary :)

ORA-01450: maximum key length (string) exceeded

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One way is use db_block_size like 16 K
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From Show parameter nls_length_semantics
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Will below solution works ?
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This I found at ORA-01450: maximum key length (6398) exceeded
thanks

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about.me/MoussaEltayeb

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Hi frnds,
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<SAP:Code area="PARSING">ADAPTER.SOAP_EXCEPTION</SAP:Code>
<SAP:P1 />
<SAP:P2 />
<SAP:P3 />
<SAP:P4 />
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Identifier length exceeds the maximum of 31 characters

I use the sun f90 compiler to compile a subroutine. However, the compiler told me the subroutine's name is too long. Deos anybody know how to solve this problem? I really need such long subroutine name. Many thanks!
% f90 -DCAM -DNO_SHR_VMATH -DHIDE_SHR_MSG -inline=%auto -fast -g -fsimple=1 -fns=no -O4 -DHIDE_MPI -g -c gfdl_column_diagnostics_mod.F90
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What is causing this error, from the windows service?
There was an exception running the extensions specified in the config file. ---> Maximum request length exceeded

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We can get the logs from:
<Install Driver>:\Program Files\Microsoft SQL Server\MSSQL.<X>\Reporting Services\LogFiles
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Maximum request length exceeded

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Maximum index key length exceeded

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