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[udig-devel] [jira] Created: (UDIG-817) suggestions for data source wizard
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suggestions for data source wizard
----------------------------------
Key: UDIG-817
URL: http://jira.codehaus.org/browse/UDIG-817
Project: uDIG
Type: Improvement
Message-ID: <447B2459.8010203@xxxxxxxxxxxxx>
Date: Mon, 29 May 2006 12:42:01 -0400
From: Chris Holmes <cholmes@xxxxxxxxxxxxx>
Organization: The Open Planning Project
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To: Jesse Eichar <jeichar@xxxxxxxxxxxxxxx>
Subject: Re: [Geotools-devel] Re: [udig-devel] [jira] Created: (UDIG-809)
postgis doesn't raise events
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Hey, if anyone's hacking on this code, could you put in a bit of a
better error report?
Now that many people are using postgres 8, when they forget their
primary key they get a message about oid's not found. Perhaps have that
error report say 'no oid's found - if you are using postgres 8 or later
you need to define a primary key on your data'.
The more elegant way would be to check the version before trying to use
the oidfidmapper, and if there's no primary key and it's later than when
oid's were phased out raise the right message about no primary key. But
the former's probably easier, and would work fine.
Chris
Jesse Eichar wrote:
> Hi Michael,
>
> I was preparing for a demo so it is possible that the classes are
> redundant and I didn't have time to correctly investigate the issue.
> I'm looking into it now and this is my current understanding, anyone
> can correct me I'm still learning postgis.
>
> OIDFidMapper and PostGISAutoIncrementMapper are not redundant because:
> 1. OIDFidMapper is used when there is no Primary key and as a last
> resort. PostGISAutoIncrementMapper is used when there is a primary key.
> 2. The implementation of createID in PostGISAutoIncrementMapper only
> works on postgres 8+ databases. If the db is not a postgres 8+ then it
> uses the AutoIncrementFIDMapper to obtain the featureID.
>
> MaxIncFIDMapper and AutoIncrementFIDMapper are not redundant because
> MaxIncFIDMapper is used when the primary key is NOT autoincrement. The
> implementations are the same because I don't know a way in SQL to query
> for the last returned item in the sequence and so ended up using the
> same query. If there is no way to make that query then perhaps
> AutoIncrementFIDMapper should be abstract and all datastore should have
> their own subclass of AutoIncrementFIDMapper.
>
> Comments are welcome.
>
> Jesse
>
> On 26-May-06, at 1:09 AM, Michael Brasser wrote:
>
>> Jesse,
>>
>> THANK YOU for your updates to the PostGIS feature id mapper (and
>> AutoIncrementFIDMapper). This one has been bugging us for a while
>> (GEOT-847, which I have now closed).
>>
>> It seems like the updates have made a couple classes redundant
>> (correct me if I'm wrong):
>>
>> +OIDFidMapper.java or PostGISAutoIncrementFIDMapper.java
>> One uses PGStatement, and the other use SQL, but I think they do the
>> same thing...
>>
>> +MaxIncFIDMapper.java or AutoIncrementFIDMapper.java
>> One uses "Select MAX...", and the other uses "...order by...", but
>> again I think they do the same thing...
>>
>> Michael
>>
>> Jesse Eichar (JIRA) wrote:
>>
>>> postgis doesn't raise events
>>> ----------------------------
>>>
>>> Key: UDIG-809
>>> URL: http://jira.codehaus.org/browse/UDIG-809
>>> Project: uDIG
>>> Type: Bug
>>>
>>> Components: postgis
>>> Versions: UDIG 1.1.RC0
>>> Reporter: Jesse Eichar
>>> Assigned to: Jody Garnett
>>> Fix For: uDig Alberta Demo
>>
>> _______________________________________________
>> User-friendly Desktop Internet GIS (uDig)
>> http://udig.refractions.net
>> http://lists.refractions.net/mailman/listinfo/udig-devel
>
>
>
>
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--
Chris Holmes
The Open Planning Project
http://topp.openplans.org
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