Dropping Default Constraints
Jun 29, 2007
Hello
We've got a product which uses merge replication with anonymous pullsubscriptions.
At most custome sites it's running on SQL Server 2000, a few with SQL 2005, which is running wich replication compatibility level 80 due to .
As it happens, db schema changes. So I have to drop a column with a default constraint. First the constraint, then the column.
This works excellently on the publisher - but not on the subscriber
The schema script 'exec sp_repldropcolumn '[dbo].[role_modul_rmd]', 'rmd_modul_enabled', 1' could not be propagated to the subscriber. (Quelle: MSSQL_REPL, Fehlernummer: MSSQL_REPL-2147201001)Hilfe abrufen: http://help/MSSQL_REPL-2147201001The object 'DF__role_modu__rmd_m__3119DB2C' is dependent on column 'rmd_modul_enabled'. (Quelle: MSSQLServer, Fehlernummer: 5074)Hilfe abrufen: http://help/5074ALTER TABLE DROP COLUMN rmd_modul_enabled failed because one or more objects access this column. (Quelle: MSSQLServer, Fehlernummer: 4922)Hilfe abrufen: http://help/4922
What can bi done?
Thanks for your advice
Aline
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Oct 13, 2004
Hi, I want to drop a column from a table with default constraint. It is giving me error..
------------------
Server: Msg 5074, Level 16, State 1, Line 1
The object 'DF__ACTIVITY___ROLLU__108B795B' is dependent on column 'ROLLUP_BGT_COST_FIXED'.
Server: Msg 4922, Level 16, State 1, Line 1
ALTER TABLE DROP COLUMN ROLLUP_BGT_COST_FIXED failed because one or more objects access this column.
-------------------------
Here is the drop statement
-----------
DROP STATISTICS ACTIVITY_BASELINE.ROLLUP_BGT_COST_FIXED
ALTER TABLE ACTIVITY_BASELINE DROP COLUMN ROLLUP_BGT_COST_FIXED;
------------------------
How can I first drop the constraint?
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Oct 15, 2007
How to remove the constraints on a table in sql server 2000? I need to drop the column, so i need to drop the constraint before that.
Alter Table Table_Name NO CHECK constraints ALL.
Once I execute the above one, it says, "Successfully Executed" but when I try to drop it doesnt allow me and gives me the following error:
Server: Msg 5074, Level 16, State 1, Line 1
The object 'DF_Users_Created_by' is dependent on column 'CREATED_BY'.
Server: Msg 4922, Level 16, State 1, Line 1
ALTER TABLE DROP COLUMN CREATED_BY failed because one or more objects access this column.
Any ideas?
Thanks,
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Jun 1, 2004
Hi,
Is it possible to use wildards in SQL to drop a constraint on a table?
Thanks!
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Apr 27, 2007
Assuming that I have created relationships (PKs and FKs) on my tables already, does the following statement permanently remove a Foreign Key constraint, or does it mearly disable it?ALTER TABLE myTable NOCHECK CONSTRAINT FK_myForeignKeyGO Also, I can't seem to find out how to temporarily remove the Identity qualifier of a field, and then reset it back as Identity later. Any help?Finally, will a failure of ALTER TABLE affect the @@ERROR variable? Can I check @@ERROR after each ALTER TABLE table statement to see if @@ERROR <> 0?The reason for both of these issues is that I am redesigning an unnormalized database, and I need to write a large script to drop all constraints on all tables, transform the data as normalized into the new table structure, and then re-enable constraints, Identity fields, etc. Thanks.
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Jul 28, 2006
I have some C# code written a little while that imports data nightly
into a database. Most of the data is typically deleted from the tables
and imported again. There are some tables where data is never deleted
and references other tables. Because there are constraints between
these tables, the code processes the import in the following sequence.
get constraints from database->drop constraints->delete data->apply
constaints->import data
I was curious how I can accomplish similiar results in SSIS. I know I
can execute a process task to manage the constraints, but I was
wondering if there is any other way.
Thanks,
PJ
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Jul 23, 2005
I just looked at a coworker's stored procedure and this person isdropping 4 Foreign key constraints and then re-adding them afterprocessing the required logic (updating rows in the 4 tables inquestion).Is there *ANY* good reason to do this? What are the performanceimplications of doing this - negative or otherwise?I was furious when I found this because every once in a while I wouldnotice that the constraints would be in flux....some days they werethere, othere days there were not. I mean, this is a good enough reasonto NOT do this, but I need some additional feedback. Maybe there *is* agood reason, and that the logic just needs tweaking.Thanks.
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Feb 10, 2004
Does anyone know a query that will return the value defined on a default constraint for a database table.column ?
So, if I have table :
create table #bill (
column1 int not null,
column2 char(4) default 'AAAA'
)
Something that would give me the 'AAAA' back ?
Thanks,
Bill
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Dec 6, 2005
Hi guys,
I am trying to write a query that seaches for all DEFAULT constraints in a database and prints the column with the default value, the value of the default, and the name of the default constraint.
So far I have the two queries that let me get all the information I need.
SELECT Name FROM sysobjects
WHERE xtype = 'D'
SELECT column_default, column_name FROM INFORMATION_SCHEMA.COLUMNS
WHERE column_default IS NOT Null
I am unable to merge them into one query. I cannot seem to find a commun field to both of them.
Many thanks in advance.
Darkneon
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Oct 30, 2005
I am doing a little research on Google about this topic and I ran intothis thread:http://groups.google.com/group/micr...dc13d4ee6758966I read SQL Server MVP Louis Davidson's post saying:"Actually they are more likely to drop the concept of bound defaults.Constraints are the standard way to do this, and really should be the wayyou create defaults anyhow."Even I read in the Microsoft SQL Server Introduction (SQL 7 bookpage 244, however we're using SQL Server 2000):"Constraints define rules regarding the values allowed in columns and arethe standard mechanism for enforcing integrity, preferred over triggers,rules, and defaults. They are also used by the query optimizer to improveperformance in selectivity estimation, cost calculations, and queryrewriting."Why constraint defaults are better? The second sentence about constraintshaving better optimization, I am guessing they don't mean this aboutDefault Constraints, rather the other type of constraints?Because I don't see how a Default Constraint have anything to do withperformance? Isn't default only to do with new records being created?At work we are setting all tables' columns to have constraint defaultsof 0 or ' ' (space character) in order not to have any column with theNULL value. Therefore we have dozens of files containing statements like:alter table TABLE1 add constraint TABLE1_ID_DFDEFAULT(' ') FOR IDgoalter table TABLE1 add constraint TABLE1_QUANTITY_DFDEFAULT(0) FOR QUANTITYgoFirst I was thinking to create 3 SQL Defaults called:DefaultZeroDefaultSpaceDefaultDateand then bind these defaults to all the columns of all tables excludingprimary keys. After creating the tables I would enumerate throughall the columns and bind one of these three Defaults based on theirdatatype:number = DefaultZerotext type = DefaultSpacedate type = DefaultDateAnd then unbind the ones that we specifically need to specify otherdefault values.So my question is should I do this by using sp_binddefault or stickwith using Default Constraints inside a table/columns loop code?Thank you
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Dec 14, 2007
Does anyone know how to tell sp_rename to look in a schema other than the default.
The code below reproduces the problem.
-- WORKS IN default schema
--
create table dbo.TestDF1(
dfField intconstraint DF1 default 0
)
go
sp_rename 'DF1', 'DF2', 'OBJECT'
go
Select name
From
sys.default_constraints
where
object_name(parent_object_id) = 'TestDF1'
go
drop table dbo.TestDF1
go
-- DOESN'T WORK IN added schema
--
create schema TestSchema
go
create table TestSchema.TestDF2(
dfField intconstraint DF3 default 0
)
go
sp_rename 'DF3', 'DF4', 'OBJECT'
go
Msg 15248, Level 11, State 1, Procedure sp_rename, Line 315
Either the parameter @objname is ambiguous or the claimed @objtype (OBJECT) is wrong.
---------------------------
drop table TestSchema.TestDF2
go
drop schema TestSchema
go
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Oct 22, 2015
CREATE TABLE XYZ
(
ID int DEFAULT 5000,
NAME VARCHAR(100)
)
I have many tables that have many columns with default values
Is there a way to get a listing of
TAB_NAME, COL_NAME, Data_type, Default_Value
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Feb 21, 2008
I am using the "Transfer SQL Server Objects Task" to copy some tables from database A to database B including data.
The tables, primary key constraints, Foreign key, data and all transfers nicely except for "DEFAULT CONSTRAINTS" on the tables.
I have failed to find any option in the "Transfer SQL Server Objects Task" task to explicitly say "copy default constraints". So I guess logically it should happen automatically but it doesn't. I hope it is not a bug :-)
Any option anyone knows will help.
Thanks.
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Jan 9, 2007
I know this is probably a flick of a switch but I cannot figure out which switch. Setup is SQL Server / Stored Procedures / DAL / BLL(skipped for testing) / PL. The stored procedure queries from only one table and two columns are ignored because they are being phased out. I can run the stored procedure and preview the data in the DAL but when I create a page with an ODS linked to the DAL and a GridView I get this error. I checked every column that does not allow nulls and they all have values. I checked unique columns (ID is the only unique and is Identity=Yes in the table definition). I checked foreign-key columns for values that are not in the foreign table and there are none. Any ideas why do I get this?
Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.
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Jan 17, 2008
Hi,
I am getting the above error when trying to load a report into my Web Application, I have tracked the error down to one specific field in my database. Even though this field is a NVarChar field and is of size 30 it would seem that there is an issue returning the value from the field. I can write it into the database no problems but when I try to get it out of the database it returns the above error.
e.g
MOB 401.908.804 - Fails
0401.907.324 - okay
8239 9082 (pager) - fails
Anyone got an idea on how to fix this????
Regards..
Peter.
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Aug 2, 2015
I have 595 default constraints in my database. I can return a list of them using the following:
select * from sys.default_constraints
Is there a way I can return a list of just the ones where NULL is still allowed? I want to update all of the columns with a default value to not allow NULLs.
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Aug 11, 2015
@pvColumnName VARCHAR(100) = Default,
However, I am unable to determine what is the value for Default. Is it '' ?
Default is not permitted as a constant - below fails to parse:
WHERE t2.TABLE_TYPE = 'BASE TABLE'
AND (@pvColumnName = Default OR t1.[COLUMN_NAME] Like @vColumnName)
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May 28, 2002
Is there a way we can prevent a object owner from dropping his tables. Example:
There is a user called 'tom' who is given create table permissions, 'tom' creates the table completes his dev and then the table is moved into production where 'tom' is still the owner. However, in production, 'tom' does not have the create table privs. Because 'tom' is the owner of the table, he is still able to drop the table in production. This is what I am trying to avoid. I would like to retain 'tom' as the owner and want to take away his create/drop privs.
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Nov 17, 2000
Does anyone have any generic scripts that Drop all the statistics that SQL auto generates?? I have hundreds of '_WA_....'
indicies that are auto created by SS7 and I just want to get rid of ALL of them. Thanks!
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Dec 7, 1999
Simple heres the syntax Alter Table XX Drop PRIMARY KEY.
This is not working whats up?
Thanks,
Phil
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Apr 12, 2001
Whats the quickest way to drop a column from a table with 1 million rows.
This is for SQL Server 6.5
Thanks for all the responses,
Chan
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May 22, 2001
I need to drop a database but cannot because there are 2 open connections that I cannot drop via EM. Is there a way to do this without starting and stopping??
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Jul 20, 1998
Hi,
I`m new at SQL Server so excuse me if this question sounds dumb.
Does anybody know how to drop columns in a table. I know I can drop and re-build the table,
but I would prefer and easier way.
Thanks
-Z
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Dec 21, 1998
Hi,
After I drop the database, I backed up the master database, I recreate the database with new name. When I tried to do the import on the command level,
It gives me the error:
Attempt to locate entry in the sysdatabases for database 'db1' by name,
failed -- no entry found in that name.
What should I do? Thanks.
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Jul 6, 2001
I have run the following script to create a default on a table:
alter table TableXYY
add default 0 for ColumnX
Now, how do I delete this default (without re-creating the table)??
Thanks
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Jul 23, 2001
Anyone know how to drop all users associated with a particular login not matter what database they're contained in?
ie login AdminUser / User AdminUser (in databases master, Dev1)
....
Thus, is there a way to drop the AdminUser login above and associated user
AdminUser in databases master, Dev1 in example above.
Thanks
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Sep 7, 2007
Hi friends,
How I can drop a database insatance from a different server ( data base is SQL Server 2005) from my code
Hoping a early reply ....
Thanks :)
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Feb 22, 2004
Hi
I am using SQL server 7 database and ASP as front end. I run an application where a text file is loaded into database. After this is done procedures are run to create a set of tables that have snapshots of the data in the text file.. each time i load a new text file i want to create the snapshots.. i hve written a stored procedure to create tables and insert values into the tables.. however how do i delete the tables i created the previous time.. the number of snapshots and their names will depend on the size of the text file.. how do i refer to all the snapshots created and drop them all before creating new ones?
plese guide
regds
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Jan 3, 2007
Looking for suggestions.
I have a database that is giving me a bad Index error. When I go to drop the necessary Index it is telling me that it either does not exist or cannot be dropped. However when I try to build that index, it tells me one already exists.
Is there any way to drop all of the indexes or at the very least see what the indexes are? This particular database is using 2005 Express.
Any help would be great!
Shawn
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Sep 20, 2006
I think the answer to this question will be something like 'you'll have to re-initialize the subscribers', but I need to ask anyway...
I created a publication where my foreign key constraint we NOT created with NOT FOR REPLICATION. My publication is configured to replicate DDL changes. Is there any way I can drop and re-create the constraint in the publisher and get replication to push the change to the subscribers?
Thanks for your help
Graham
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Mar 10, 2007
I have trouble dropping a job that was a maintence plan.
I get the following error. Is there a way around this?
TITLE: Microsoft SQL Server Management Studio
------------------------------
Drop failed for Job 'Maintenne Plan'. (Microsoft.SqlServer.Smo)
An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)
------------------------------
The DELETE statement conflicted with the REFERENCE constraint "FK_subplan_job_id". The conflict occurred in database "msdb", table "dbo.sysmaintplan_subplans", column 'job_id'.
The statement has been terminated. (Microsoft SQL Server, Error: 547)
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Jan 16, 2008
I am trying to run a dymanic DROP DATABASE <dbname> command in a stored procedure called from ASP.NET. I typically connect from the .net using a SQL builtin account. I am getting this error:
System.Data.SqlClient.SqlException: Cannot drop the database 'db_testco', because it does not exist or you do not have permission.
The database is there for sure asI can browse it via the Studio manager. What permission do I need to set for my .net login to allow it to drop ? I tried adding the Delete permission to the database and still no go...
Setup: SQL 2005 SP2 2 Node cluster.
Thanks.
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Oct 11, 2007
Hi,
I have a table with multiple column and has millions of rows in it(say about 50 millions ) and its in production.
What is the best way of dropping the a column from the table without impacting the systems performance. Remeber this table will be used some application to get some data out of it.
~Mohan
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