473,804 Members | 2,048 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

pg_dump and circular dependency

Table A has a CHECK constraint testing boolean function F.
Function F has a SELECT from Table A.

In my manual build script, I create the table, then the function, and then at the very end of the script to I do an ALTER TABLE ADD CHECK.

pg_dump appears to put the CHECK constraint as a clause in the CREATE TABLE statement. Now I'm in trouble, because whichever of the table or the function is read in first by pg_restore refers to an object that hasn't been created yet. The restore fails.

I suppose I can replace the CHECK with an explicit trigger (that uses an exception) and then pg_dump will get the creation sequence correct. Is there another way?

---------------------------(end of broadcast)---------------------------
TIP 4: Don't 'kill -9' the postmaster

Nov 22 '05 #1
1 2149
an****@pillette .com writes:
Table A has a CHECK constraint testing boolean function F.
Function F has a SELECT from Table A. In my manual build script, I create the table, then the function, and then at the very end of the script to I do an ALTER TABLE ADD CHECK. I suppose I can replace the CHECK with an explicit trigger (that uses an exception) and then pg_dump will get the creation sequence correct. Is there another way?


In 7.4 you could create the function first using SET
check_function_ bodies = false. 7.5 will have a proper solution...
pg_dump can now actually detect reference circularities and fix them
by using ALTER ...

regards, tom lane

---------------------------(end of broadcast)---------------------------
TIP 7: don't forget to increase your free space map settings

Nov 22 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

4
2828
by: Evelyne | last post by:
On a server W2K, IIS5, I have many messages from ASP : cirdular dependency between types/modules. Which can be the origin of the problem? Example : Event Type: Warning Event Source: Active Server Pages Event Category: None Event ID: 9 Date: 09/07/2004 Time: 09:29:25
2
3106
by: ernesto basc?n pantoja | last post by:
Hi everybody: I'm implementing a general C++ framework and I have a basic question about circular dependencies: I am creating a base class Object, my Object class has a method defined as: virtual String toString(); where String is defined as:
4
4804
by: ro86 | last post by:
Hello everyone! I am a newbie to C++ (~1 Week experience) and I have a few months of experience with object-oriented languages (Objective-C). I am currently working just for fun on a particle system. All the particles are controlled by a "server". The server performs all kinds of operations on them (updating, drawing etc.). The particles (my "clients") on the other hand need to retrieve once a while some information from their server...
4
3288
by: Henke | last post by:
I have this scenario. public class A { public int numbers; public class A() { }
2
761
by: Rimma Meital via .NET 247 | last post by:
(Type your message here) -------------------------------- From: Rimma Meital I have 2 DLLs (Class Libraries). Both defines single-ton objects - logger object (writes to logger) and application_management object (stores paths and other things, reads ini file of the application). Both needs to refer to each other -> application_management can write to a logger and logger needs to know the path of logger file. Of course, it's circular...
4
3817
by: jack turer | last post by:
I have a database in pgsql (7.3.2) on redhat 9. When I try a 'pg_dump mydb' to back up the database, I get: pg_dump: could not find namespace with OID 2200 Verbose version is: -bash-2.05b$ pg_dump -v mydb | more pg_dump: saving database definition pg_dump: reading namespaces pg_dump: reading user-defined types
3
2877
by: Rob Clark | last post by:
Hi, I have an issue which is the ordinary and always recurring circular dependency - but I do not know how to resolve it :-( The usual forward declaration does not help... I have a client that uses a resource. As a consequence of using the resource, the resource later receives an asynchronous notification (from an underlying layer, e.g. OS). This notification should then be forwarded to the Client that owns the resource.
7
13527
by: barias | last post by:
Although circular dependencies are something developers should normally avoid, unfortunately they are very easy to create accidentally between classes in a VS project (i.e. circular compile-time dependencies). But then I started wondering how "easy" it would be to similarly make a NON-RUNTIME circular dependency between (implicitly linked) DLLs. Indeed authors like John Lakos, who focus on compile/link-time dependencies (not run-time),...
3
7060
by: donnyma | last post by:
I have a problem that looks like it has not been discussed before in these groups. I have a simple SQLAgent job that runs sp_who (could be anything, but let's just say sp_who for this example). I have set the jobstep to write to an output file "T:\out.txt". If the job is owned by an admin, it runs fine and writes the output file. If it is owned by a non-admin user, it gets the following error msg: Warning: cannot write logfile...
0
9716
marktang
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...
0
10354
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
10359
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,...
0
10101
tracyyun
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...
0
9177
agi2029
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...
1
7643
isladogs
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...
0
5536
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
0
5675
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
2
3837
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.