<div>Hi Pierre,</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Oracle stores its own metadata into mdsys.all_sdo_geom_metadata table.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">I think Oracle provider uses this table, but I would like to know if it’s true ?</span></p></blockquote>
<div><br></div><div>Yes it does if you tick the checkbox for "Only Look in meta data table", otherwise QGIS will scan the entire database.</div><div>Advantage - It's infinitely faster using the Oracle metadata table.</div>
<div>Disadvantage - you need to keep it up to date; Oracle doesn't do it natively.</div><div><br></div><div>Jonathan</div><br><br><div class="gmail_quote">On 2 July 2013 08:32, PIERRE Sylvain <span dir="ltr"><<a href="mailto:sylvain.pierre@cg67.fr" target="_blank">sylvain.pierre@cg67.fr</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="FR" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hi all,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I’m now going deeper into testing :<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I load some big table (200 000 or 300 000 rows with polygon geomtry) from our coprorate DB.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I compare time loading with same operation in Mapinfo.<u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Loading takes little more time than in Mapinfo, but panning zooming are slightly slower with Mapinfo than QGis.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">For the first point Mapinfo uses a metadata table (MAPCATALOG) which stores layer’s bounding box.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Oracle stores its own metadata into mdsys.all_sdo_geom_metadata table.<u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I think Oracle provider uses this table, but I would like to know if it’s true ?<u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Or is there any other action from Qgis api before loading that makes this difference ?<u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thanks<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><table border="1" cellpadding="0" style="border:none;border-top:solid gray 1.0pt">
<tbody><tr style="min-height:54.95pt"><td width="294" style="width:220.5pt;border:none;padding:1.5pt 1.5pt 1.5pt 1.5pt;min-height:54.95pt"><p class="MsoNormal" style="margin-left:21.3pt"><b><span lang="EN-US" style="font-size:14.0pt;font-family:"Arial","sans-serif";color:#cc0066">→</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1f497d"> </span><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d">Sylvain PIERRE</span></b><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#cc0066"><u></u><u></u></span></b></p>
<div class="im"><p class="MsoNormal" style="margin-left:21.3pt"><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#cc0066"> </span><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">Ingénieur Géographe<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-left:21.3pt"><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"> Adjoint au chef du service<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:21.3pt">
<span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"> Direction de l’Agriculture, de l’Espace Rural et de l’Environnement<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:21.3pt">
<span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"> </span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">Service Administration Générale<u></u><u></u></span></p>
</div><p class="MsoNormal" style="margin-left:21.3pt;line-height:115%"><span style="font-family:"Arial","sans-serif";color:navy"> </span><b><span style="font-size:8.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#1f497d">Conseil Général du Bas-Rhin</span></b><b><span style="font-size:8.0pt;line-height:115%;font-family:"Arial","sans-serif";color:navy"><u></u><u></u></span></b></p>
</td><td width="167" style="width:125.35pt;border:none;padding:1.4pt 1.4pt 1.4pt 1.4pt;min-height:54.95pt"><p class="MsoNormal" align="center" style="text-align:center;line-height:115%"><a href="http://www.bas-rhin.fr/" target="_blank"><span style="color:navy;text-decoration:none"><img border="0" width="152" height="72" alt="Description : Description : \\dsi7085103\c$\Users\samuel.guigon\Pictures\CG67\logo_CG67+www_coul.jpg"></span></a><span lang="EN-US" style="font-size:8.0pt;line-height:115%;font-family:"Calibri","sans-serif";color:#1f497d"><u></u><u></u></span></p>
</td></tr><tr style="min-height:54.95pt"><td width="463" colspan="2" style="width:347.35pt;border-top:solid gray 1.0pt;border-left:none;border-bottom:solid gray 1.0pt;border-right:none;padding:1.5pt 1.5pt 1.5pt 1.5pt;min-height:54.95pt">
<p class="MsoNormal" style="line-height:115%"><span style="font-size:8.0pt;line-height:115%;font-family:"Arial","sans-serif";color:gray"> </span><span lang="EN-US" style="font-size:8.0pt;line-height:115%;font-family:"Arial","sans-serif";color:gray">Passerelle 67 <br>
</span></p><div class="im"> 20 rue Livio / 67000 Strasbourg<br> Tél : <a href="tel:%2B33%203%2088%2076%2068%2088" value="+33388766888" target="_blank">+33 3 88 76 68 88</a> – mobile :<br> Fax : 03 88 76 68 71<br>
Email : <a href="mailto:sylvain.pierre@cg67.fr" target="_blank">sylvain.pierre@cg67.fr</a><u></u><u></u></div><p></p></td></tr></tbody></table><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
</div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">De :</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:qgis-user-bounces@lists.osgeo.org" target="_blank">qgis-user-bounces@lists.osgeo.org</a> [mailto:<a href="mailto:qgis-user-bounces@lists.osgeo.org" target="_blank">qgis-user-bounces@lists.osgeo.org</a>] <b>De la part de</b> PIERRE Sylvain<br>
<b>Envoyé :</b> jeudi 27 juin 2013 11:24<br><b>À :</b> kimaidou; Andreas Neumann<br><b>Cc :</b> qgis-user<br><b>Objet :</b> Re: [Qgis-user] QGIS and Oracle native connection<u></u><u></u></span></p></div></div><div class="im">
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hi,<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Yes !<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Unlike Oracle DB manager which, each time you run it, re-scan all schemas, the browse panel scan only one time.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thanks a lot !<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p></div><table border="1" cellpadding="0" style="border:none;border-top:solid gray 1.0pt">
<tbody><tr style="min-height:54.95pt"><td width="294" style="width:220.5pt;border:none;padding:1.5pt 1.5pt 1.5pt 1.5pt;min-height:54.95pt"><p class="MsoNormal" style="margin-left:21.3pt"><b><span lang="EN-US" style="font-size:14.0pt;font-family:"Arial","sans-serif";color:#cc0066">→</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1f497d"> </span><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1f497d">Sylvain PIERRE</span></b><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#cc0066"><u></u><u></u></span></b></p>
<div class="im"><p class="MsoNormal" style="margin-left:21.3pt"><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#cc0066"> </span><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">Ingénieur Géographe<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-left:21.3pt"><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"> Adjoint au chef du service<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:21.3pt">
<span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"> Direction de l’Agriculture, de l’Espace Rural et de l’Environnement<u></u><u></u></span></p><p class="MsoNormal" style="margin-left:21.3pt">
<span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d"> </span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#1f497d">Service Administration Générale<u></u><u></u></span></p>
</div><p class="MsoNormal" style="margin-left:21.3pt;line-height:115%"><span style="font-family:"Arial","sans-serif";color:navy"> </span><b><span style="font-size:8.0pt;line-height:115%;font-family:"Arial","sans-serif";color:#1f497d">Conseil Général du Bas-Rhin</span></b><b><span style="font-size:8.0pt;line-height:115%;font-family:"Arial","sans-serif";color:navy"><u></u><u></u></span></b></p>
</td><td width="167" style="width:125.35pt;border:none;padding:1.4pt 1.4pt 1.4pt 1.4pt;min-height:54.95pt"><p class="MsoNormal" align="center" style="text-align:center;line-height:115%"><a href="http://www.bas-rhin.fr/" target="_blank"><span style="color:navy;text-decoration:none"><img border="0" width="152" height="72" alt="Description : Description : \\dsi7085103\c$\Users\samuel.guigon\Pictures\CG67\logo_CG67+www_coul.jpg"></span></a><span lang="EN-US" style="font-size:8.0pt;line-height:115%;font-family:"Calibri","sans-serif";color:#1f497d"><u></u><u></u></span></p>
</td></tr><tr style="min-height:54.95pt"><td width="463" colspan="2" style="width:347.35pt;border-top:solid gray 1.0pt;border-left:none;border-bottom:solid gray 1.0pt;border-right:none;padding:1.5pt 1.5pt 1.5pt 1.5pt;min-height:54.95pt">
<p class="MsoNormal" style="line-height:115%"><span style="font-size:8.0pt;line-height:115%;font-family:"Arial","sans-serif";color:gray"> </span><span lang="EN-US" style="font-size:8.0pt;line-height:115%;font-family:"Arial","sans-serif";color:gray">Passerelle 67 <br>
</span></p><div class="im"> 20 rue Livio / 67000 Strasbourg<br> Tél : <a href="tel:%2B33%203%2088%2076%2068%2088" value="+33388766888" target="_blank">+33 3 88 76 68 88</a> – mobile :<br> Fax : 03 88 76 68 71<br>
Email : <a href="mailto:sylvain.pierre@cg67.fr" target="_blank">sylvain.pierre@cg67.fr</a><u></u><u></u></div><p></p></td></tr></tbody></table><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">De :</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:qgis-user-bounces@lists.osgeo.org" target="_blank">qgis-user-bounces@lists.osgeo.org</a> [mailto:<a href="mailto:qgis-user-bounces@lists.osgeo.org" target="_blank">qgis-user-bounces@lists.osgeo.org</a>] <b>De la part de</b> kimaidou</span></p>
<div class="im"><br><b>Envoyé :</b> jeudi 27 juin 2013 10:23<br></div><div class="im"><b>À :</b> Andreas Neumann<br><b>Cc :</b> qgis-user<br></div><b>Objet :</b> Re: [Qgis-user] QGIS and Oracle native connection<u></u><u></u><p>
</p><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal" style="margin-bottom:12.0pt">Hi <br></p><div class="im"><br>A suggestion : have you tried to use the Browser pannel ( in french : Menu Vue > Panneaux > Parcourir) or the DbManager to access the data ? With these 2 tools, you can very quickly navigate through databases, schemas and tables, without the need to wait for QGIS to scan them all.<u></u><u></u></div>
<p></p></div><div><p class="MsoNormal">Regards<u></u><u></u></p></div><div><p class="MsoNormal">Michael<u></u><u></u></p></div></div><div><div class="h5"><div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p>
<div><p class="MsoNormal">2013/6/26 Andreas Neumann <<a href="mailto:a.neumann@carto.net" target="_blank">a.neumann@carto.net</a>><u></u><u></u></p><p class="MsoNormal">Hi,<br><br>I think this would be a very useful addition also for other database providers (Postgis, SQL server, etc.)<br>
<br>The problem is that we are in feature freeze now. Only bugfixes allowed at this time. New features (like this two-step scanning will have to wait for QGIS 2.0x or 2.1.<br><br>Andreas<u></u><u></u></p><div><p class="MsoNormal">
<br><br>On Wed, 26 Jun 2013 09:38:38 +0200, PIERRE Sylvain wrote:<u></u><u></u></p></div><blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
<div><p class="MsoNormal" style="margin-bottom:12.0pt">Hi everybody,<br><br>I’ve installed Qgis-dev yesterday in order to test Oracle<br>connection.<br><br>I work in a french local government. 95% of our data are stored into<br>
Oracle.<br><br>So this new connection looks very interesting for us.<br><br>The main things is definitively slowness at scanning DB.<br><br>We have more than 20 schema and users can’t wait that Qgis scans all<br>schemas until they can load their data.<br>
<br>I know you can stop scan BUT if unfortunatly you are interest in the<br>last one schema, you have to wait…<br><br>Is it possible to only list all schema in the UI and only scan data on<br>demand when user select a schema ?<br>
<br>Sylvain<u></u><u></u></p></div><p class="MsoNormal">→ SYLVAIN PIERRE<u></u><u></u></p><div><p class="MsoNormal" style="margin-bottom:12.0pt"><br><br> Ingénieur Géographe<br><br> Adjoint au chef du service<br>
<br> Direction de l’Agriculture, de l’Espace Rural et<br>de l’Environnement<br><br> Service Administration Générale<u></u><u></u></p></div><p class="MsoNormal"> CONSEIL GÉNÉRAL DU BAS-RHIN<br><br> [1]<u></u><u></u></p>
<div><p class="MsoNormal"><br><br> Passerelle 67<br> 20 rue Livio / 67000 Strasbourg<br> Tél : <a href="tel:%2B33%203%2088%2076%2068%2088" target="_blank">+33 3 88 76 68 88</a> – mobile :<br> Fax : 03 88 76 68 71<u></u><u></u></p>
</div><p class="MsoNormal"> Email : <a href="mailto:sylvain.pierre@cg67.fr" target="_blank">sylvain.pierre@cg67.fr</a> [2]<br><br>DE : <a href="mailto:qgis-user-bounces@lists.osgeo.org" target="_blank">qgis-user-bounces@lists.osgeo.org</a><br>
[mailto:<a href="mailto:qgis-user-bounces@lists.osgeo.org" target="_blank">qgis-user-bounces@lists.osgeo.org</a>] DE LA PART DE Jonathan<br>Moules<br>ENVOYÉ : mardi 14 mai 2013 18:05<br>À : Jürgen E.; <a href="mailto:qgis-user@lists.osgeo.org" target="_blank">qgis-user@lists.osgeo.org</a><br>
OBJET : Re: [Qgis-user] QGIS and Oracle native connection<u></u><u></u></p><div><p class="MsoNormal" style="margin-bottom:12.0pt"><br><br>Hi Jürgen,<br><br>I've updated to the newest nightly build (1.9.0-19 - yesterday) and<br>
note it has a couple of fixes. Its also faster, in part because its<br>not listing the recycling tables now.<br><br>We have 551 rows in our all_sdo_geom_metadata table - seems we've had<br>a clean-up.<u></u><u></u></p>
<p class="MsoNormal">Can you work out which queries take particularly long (I added some<br>progress messages recently)?<u></u><u></u></p><p class="MsoNormal" style="margin-bottom:12.0pt"><br>I'm now using "only look in meta data table", "use estimated table<br>
metadata" and "only existing geometry types" as my defaults.<br><br>In the bottom left there's something that says "Scanning column ... "<br>and then shows the column. The speed this cycles through tables seems<br>
to vary - it goes blur-fast if I've just done it a minute ago (despite<br>restarting QGIS), so I guess in those cases Oracle caches - it only<br>takes < 5 seconds.<br><br>But if I do it for the first time, some of them take a significant<br>
time, though it doesn't seem to be entirely related to their size (the<br>vast majority of the tables are only in the thousands of rows or<br>smaller - the millions are the exception (probably 5)).<u></u><u></u></p><p class="MsoNormal">
You can "stop" the detection and then pick what's already there.<u></u><u></u></p><p class="MsoNormal" style="margin-bottom:12.0pt"><br>I completely missed the fact that "connect" turns into stop. Even took<br>
me a minute after reading your email to find it.<br><br>Do you have<u></u><u></u></p></div><div><blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
<p class="MsoNormal">re isn't any primary key) on<br>the client side.<br><br>Yes and no. Each table has a column with a unique number that is set<u></u><u></u></p></blockquote></div><p class="MsoNormal"> be unique and not-nullable, but its not set as a primary key in<u></u><u></u></p>
<div><p class="MsoNormal"><br>Oracle. MapInfo and ArcSDE use this column as their index (MapInfo<br>because its called MI_PRINX, and ArcSDE because we tell it to when we<br>register the table).<br><br>I don't know how normal this setup is, but the only other thing that's<br>
ever hinted at wanting an explicit primary key is GeoServer, and then<br>only as a "WARN" event in the logs.<br><br>A thought - if it can't find a primary key, how about testing to see<br>if there's a column called MI_PRINX? Anywhere with MapInfo will have<br>
it.<br><br><a href="http://testdrive.mapinfo.com/TECHSUPP/MIPROD.NSF/5c41496d5951a49c852562b5004f3a44/fcb3edc86ce9460b80256ae7004ee597" target="_blank">http://testdrive.mapinfo.com/TECHSUPP/MIPROD.NSF/5c41496d5951a49c852562b5004f3a44/fcb3edc86ce9460b80256ae7004ee597</a><u></u><u></u></p>
</div><p class="MsoNormal">[3]<br><br>Jonathan<br><br>On 14 May 2013 10:31, Jürgen E. wrote:<u></u><u></u></p><div><div><p class="MsoNormal"><br><br>Hi Jonathan,<br><br>On Mon, 13. May 2013 at 13:06:49 +0100, Jonathan Moules wrote:<u></u><u></u></p>
<p class="MsoNormal">The first and most obvious thing is that it's incredibly slow to<u></u><u></u></p><p class="MsoNormal">list the<u></u><u></u></p><p class="MsoNormal">tables. I don't know how many tables were used in the test setup,<u></u><u></u></p>
<p class="MsoNormal">but we<u></u><u></u></p><p class="MsoNormal">have over a thousand spatial tables ranging from one row to 20<u></u><u></u></p><p class="MsoNormal">million on<u></u><u></u></p><p class="MsoNormal">an Oracle Locator 10g setup that has about 50 concurrent users.<br>
In the best case scenario ("Only look in meta data table" and "Use<br>estimated table metadata" both checked), it still takes a full two<u></u><u></u></p><p class="MsoNormal">minutes<u></u><u></u></p>
<p class="MsoNormal">
to list all of the tables. If I don't have those checkboxes checked<u></u><u></u></p><p class="MsoNormal">it<u></u><u></u></p><p class="MsoNormal">takes much longer (scanning the table that has ~20million features<u></u><u></u></p>
<p class="MsoNormal">alone<u></u><u></u></p><p class="MsoNormal">takes about a minute!).<u></u><u></u></p><p class="MsoNormal" style="margin-bottom:12.0pt"><br>Can you work out which queries take particularly long (I added some<br>
progress<br>messages recently)?<u></u><u></u></p><p class="MsoNormal">Does QGIS need to do all of the checks it does when actually listing<u></u><u></u></p><p class="MsoNormal">the<u></u><u></u></p><p class="MsoNormal">tables?<u></u><u></u></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>Well, QGIS needs to know which geometry types are present. And that<br>might take<br>long to determine. It might be possible to do that lazy - ie. on<br>demand<br>(introduce another level to the tree where the types in the geometry<br>
column<br>are.<u></u><u></u></p><p class="MsoNormal">Its also impossible to "add" a table while the list is being<u></u><u></u></p><p class="MsoNormal">generated so<u></u><u></u></p><p class="MsoNormal">the user has to wait until its finished before being able to<u></u><u></u></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">continue.<br><br>You can "stop" the detection and then pick what's already there.<u></u><u></u></p><p class="MsoNormal">Panning. Again, fine with smaller datasets, but the larger ones<u></u><u></u></p>
<p class="MsoNormal">cause<u></u><u></u></p><p class="MsoNormal">issues.<u></u><u></u></p><p class="MsoNormal"><br>Do you have numeric primary keys? Otherwise QGIS must build a map that<br>assigns<br>numeric keys to the primary keys (or ROWID if there isn't any primary<br>
key) on<br>the client side.<br><br>Jürgen<br><br>--<br>Jürgen E. Fischer norBIT GmbH Tel. +49-4931-918175-31<br>Dipl.-Inf. (FH) Rheinstraße 13 Fax. +49-4931-918175-50<u></u><u></u></p></div></div><p class="MsoNormal">Software Engineer D-26506 Norden <a href="http://www.norbit.de" target="_blank">http://www.norbit.de</a> [5]<u></u><u></u></p>
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