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<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">thanks for the response!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">## What means "big" (how many records are you dealing with)?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">These are the sizes (number of records) of the main tables:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">- location (points) ~ 450 000<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">- event ~ 150 000<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">- occurrence ~ 270 000<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">## I know this sounds silly - but are your tables properly indexed (you<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">don't have to index primary keys, but other columns that are used in<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">relations need an index)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">There are indexes for the foreign keys of the main tables. Also all "controlled vocabulary" columns are indexed.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">Th referencing tables are usually smaller than 500 records.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">## What exact QGIS version are you using? 2.18.x - in the about dialogue<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">you can find this, including the exact github version string<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">I tried it with:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">- Ubuntu 16.04 (in virtual machine on Windows 10): 2.18.11 https://github.com/qgis/QGIS/commit/29548e7<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">- Windows 10: 2.18.11 https://github.com/qgis/QGIS/commit/29548e7<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">## How I set everything up<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">I created "relations" (location-event and event-occurrence) in the project properties.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">In the "fields" tab of the layers properties I also changed respective "edit widgets" to "Relation Reference".<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">For the controlled vocabulary I changed the "edit widgets" to "Value Relation" (I used the Autoform plugin https://github.com/sourcepole/AutoForm for it and checked it manually)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">I kept "Attribute editor layout" with the "Autogenerate" setting.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">## What I want to have:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">I want to be able to add new events (and occurrences) to locations.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">## What happens:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">When I want to create a new **location**, I have to wait for a few minutes. Then the input window pops up, but I cannot access it because QGIS has frozen.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">When I want to create a new **event**, an empty window opens, QGIS freezes and nothing happens for many minutes.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">When I want to create a new **occurrence**, the table opens slowly, but I can enter all necessary values and store it to the database.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">## Question:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">Can QGIS handle tables of the sizes mentioned above?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">Do you have an idea, what I could have done wrong?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext">I could also provide more information and maybe even a minimal example.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext">Thanks and best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:windowtext">Jakob<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="color:windowtext;mso-fareast-language:NO-BOK">From:</span></b><span lang="EN-US" style="color:windowtext;mso-fareast-language:NO-BOK"> Qgis-user [mailto:qgis-user-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Andreas Neumann<br>
<b>Sent:</b> fredag 4. august 2017 09.39<br>
<b>To:</b> qgis-user@lists.osgeo.org<br>
<b>Subject:</b> Re: [Qgis-user] QGIS Input Form for PostGIS<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p>Hi Jakob,<span style="font-size:12.0pt;mso-fareast-language:NO-BOK"><o:p></o:p></span></p>
<p>I don't think there is much background information or documentation available on relations.<o:p></o:p></p>
<p>The obvious questions to you are:<o:p></o:p></p>
<p>- What means "big" (how many records are you dealing with)?<o:p></o:p></p>
<p>- I know this sounds silly - but are your tables properly indexed (you don't have to index primary keys, but other columns that are used in relations need an index)<o:p></o:p></p>
<p>- What exact QGIS version are you using? 2.18.x - in the about dialogue you can find this, including the exact github version string<o:p></o:p></p>
<p>- if we can't help you further, it may help to see your create table statements (including all indexes)<o:p></o:p></p>
<p>Andreas<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On 03.08.2017 11:47, Jakob Miksch wrote:<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span lang="EN-GB">Hello,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">I have a (rather big) Postgres/PostGIS database that basically looks like this:
<a href="https://ibb.co/bK7PKv">https://ibb.co/bK7PKv</a></span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">I want to use QGIS for editing and inserting data.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">I already found these ressources:</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"><a href="https://docs.qgis.org/2.18/en/docs/user_manual/working_with_vector/vector_properties.html#fields-properties">https://docs.qgis.org/2.18/en/docs/user_manual/working_with_vector/vector_properties.html#fields-properties</a></span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"><a href="https://docs.qgis.org/2.18/en/docs/user_manual/working_with_vector/attribute_table.html#creating-one-or-many-to-many-relations">https://docs.qgis.org/2.18/en/docs/user_manual/working_with_vector/attribute_table.html#creating-one-or-many-to-many-relations</a></span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"><a href="https://docs.qgis.org/2.18/en/docs/training_manual/create_vector_data/forms.html">https://docs.qgis.org/2.18/en/docs/training_manual/create_vector_data/forms.html</a></span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">I tried it: I created the relations and built custom forms.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">However, when I want to insert or edit something. QGIS becomes really slow and crashes finally. But before I describe the problems in more detail I want to read more about it. I find the documentation (linked above) a
bit too little. </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">So, my question:</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Is there any documentation I have missed?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Is there any book (chapter) you can recommend?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Do you know of any example where QGIS is used for entering data into many related tables in Postgres/PostGIS at once?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB">I am thankful for any hint or resource.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal">Jakob<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:NO-BOK"><br>
<br>
<br>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:NO-BOK"><o:p> </o:p></span></p>
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