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by: John Towell |
last post by:
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We are trying to load a set of data using Hibernate (O/R mapping tool).
Hibernate creates foreign key constraints when it is creating our DB
(mysql 4.0.14). The process for loading data requires us to break these
constraints at certain points, however they will all be satisfied at the
end of the transaction.
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by: Jason Madison |
last post by:
We sometimes get very large databases that we want to cut down to use for
testing.
The information is all related to a central accounts table.
The way I thought of doing this is to grab all the foreign constraints and
turn them into cascade delete constraints, then delete as many accounts as I
want.
After this I will restore the constraints back to their original state.
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by: Scott Ribe |
last post by:
I've got a problem which I think may be a bug in Postgres, but I wonder if
I'm missing something. Two tables, A & B have foreign key relations to each
other. A 3rd table C, inherits from A. A stored procedure updates a row in
C, adds a row each in B & C. I get an integrity violation. All the foreign
keys are deferrable, and the stored procedure is called from within a
transaction with constraints deferred. (And the foreign keys do refer to...
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by: Brendan Jurd |
last post by:
Hi all,
I read on the manual page for Inheritance that:
"A limitation of the inheritance feature is that indexes (including
unique constraints) and foreign key constraints only apply to single
tables, not to their inheritance children. Thus, in the above example,
specifying that another table's column REFERENCES cities(name) would
allow the other table to contain city names but not capital names. This
deficiency will probably be fixed...
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by: Bob Stearns |
last post by:
Why is the following constraint invalid? I want to make sure that every
row in IS3.ANIMALS_PRIV_INDEXES matches one of those in
IS3.table_var_defn with part of the primary key fixed. Since this is
illegal with the following message, how do I achieve this result? The
last thing below is a working constraint from another table.
ALTER TABLE IS3.ANIMALS_PRIV_INDEXES
ADD CONSTRAINT
FOREIGN KEY(3, variable_id)
REFERENCES...
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by: Rajesh Tiwari |
last post by:
Hi Group,
i have a foreign key in a table in sql server.i am using a dataset and
populating it with the contents of this table.my problem is that i am not
able to access the foreign key that i cretaed on this table in the
database.i am using a code something like this.if i check the number of
constraints on the table it prints 1,which is nothing but the primary key
constraint on this table,why doesn't it print 2 and show both primary and...
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by: wespvp |
last post by:
I am using PostgreSQL 7.4.1 on RedHat 7.2.
The query I am executing is something like (I replaced all the return values
with 'count'):
db=> explain select count(*) from messages m join (select * from
message_recipients r join addresses a on a.Address_Key=r.Recipient where
a.Address='lra.edi@edi.cma-cgm.com') as foo on
(m.Message_Key=foo.Message_Key AND (m.Message_Date >= '29-MAR-04') AND
(m.Message_Date <= '31-MAR-04...
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by: okonita |
last post by:
DB2v8.2 LUW. Unable to drop Foreign Key constraints...although DROP constraints returns undefined name. Am I missing somrthing here?
Hi all,
I have a perplexing DB2 Drop command situation. Environment I have tried severally to drop Foreign Key constraints on a set of tables and each time I get a SQL0204N "SQL071030104307060" is an undefined name. ".
However, when I go back to look at the table or load data, I get a constraint error...
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by: Bobby Edward |
last post by:
I have an xsd dataset. I created a simple query called GetDataByUserId. I
can preview the data fine!
I created a very simple BLL function that calls it and returns a datatable.
When I run the code I get....
=======================
Server Error in '/MyCompanyMyProject' Application.
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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