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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Just a side note because a lot of people seem to be deploying on Database as a Service platforms.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>The big DbaaS providers do not offer plpython as an extension because it is untrusted. You probably won’t find any PL language that is untrusted on any of the top 4 cloud providers.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>So if you are using Amazon RDS, Aurora, Microsoft Azure, or Google Cloud DbaaS, you should expect to not have it.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Note I’m not talking about running your own VMS on these, if you have PostgreSQL installed on your own VM, then the DbaaS restrictions don’t affect you. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> postgis-users [mailto:postgis-users-bounces@lists.osgeo.org] <b>On Behalf Of </b>Imre Samu<br><b>Sent:</b> Saturday, December 3, 2022 11:10 PM<br><b>To:</b> PostGIS Users Discussion <postgis-users@lists.osgeo.org><br><b>Subject:</b> Re: [postgis-users] Has anyone got novel Python function example<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>> It will be interesting to see novel Python functions in PostGIS.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Server side?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>1. Postgis Raster see<o:p></o:p></p></div><div><p class=MsoNormal> "11.3.4. Use PLPython to dump out images via SQL" <o:p></o:p></p></div><div><p class=MsoNormal> <a href="https://postgis.net/docs/using_raster_dataman.html">https://postgis.net/docs/using_raster_dataman.html</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>2.) book: "PostGIS-Cookbook" <a href="https://www.packtpub.com/product/postgis-cookbook-second-edition/9781788299329">https://www.packtpub.com/product/postgis-cookbook-second-edition/9781788299329</a><o:p></o:p></p></div><div><p class=MsoNormal> - "Writing PostGIS functions with PL/Python"<o:p></o:p></p></div><div><p class=MsoNormal> <a href="https://github.com/PacktPublishing/PostGIS-Cookbook-Second-Edition/blob/master/Chapter08/code%20snippets/chp08_R4.sql">https://github.com/PacktPublishing/PostGIS-Cookbook-Second-Edition/blob/master/Chapter08/code%20snippets/chp08_R4.sql</a><o:p></o:p></p></div><div><p class=MsoNormal> - "Geocoding with geopy and PL/Python" <o:p></o:p></p></div><div><p class=MsoNormal> <a href="https://github.com/PacktPublishing/PostGIS-Cookbook-Second-Edition/blob/master/Chapter08/code%20snippets/chp08_R7.sql">https://github.com/PacktPublishing/PostGIS-Cookbook-Second-Edition/blob/master/Chapter08/code%20snippets/chp08_R7.sql</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><div><p class=MsoNormal>3.) The plpygis has some simple examples: <a href="https://plpygis.readthedocs.io/en/latest/examples.html">https://plpygis.readthedocs.io/en/latest/examples.html</a><o:p></o:p></p></div><div><p class=MsoNormal>"<span class=gmail-pre><span style='font-size:11.0pt;font-family:"Courier New";background:#ECF0F3'>plpygis</span></span><span style='font-size:13.0pt;color:#3E4349'> is a Python conveter to and from the PostGIS </span><span class=gmail-pre><span style='font-size:11.0pt;font-family:"Courier New";background:#ECF0F3'>geometry</span></span><span style='font-size:13.0pt;color:#3E4349'> type, WKB, EWKB, GeoJSON and Shapely geometries and additionally supports </span><span class=gmail-pre><span style='font-size:11.0pt;font-family:"Courier New";background:#ECF0F3'>__geo_interface__</span></span><span style='font-size:13.0pt;color:#3E4349'>. </span><span class=gmail-pre><span style='font-size:11.0pt;font-family:"Courier New";background:#ECF0F3'>plpygis</span></span><span style='font-size:13.0pt;color:#3E4349'> is intended for use in PL/Python functions."</span><o:p></o:p></p></div><div><p class=MsoNormal>see more: <o:p></o:p></p></div><div><p class=MsoNormal>- <a href="https://plpygis.readthedocs.io/en/latest/">https://plpygis.readthedocs.io/en/latest/</a><o:p></o:p></p></div><div><p class=MsoNormal>- <a href="https://github.com/bosth/plpygis">https://github.com/bosth/plpygis</a><o:p></o:p></p></div><div><p class=MsoNormal>- slide ( 2017 ) <a href="https://2017.foss4g.org/post_conference/Extending-PostGIS-with-Python.pdf">https://2017.foss4g.org/post_conference/Extending-PostGIS-with-Python.pdf</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>4.) CartoDB is also plpythonu based.<o:p></o:p></p></div><div><p class=MsoNormal>- <a href="https://github.com/search?q=repo%3ACartoDB%2Fcartodb+plpython&type=code">https://github.com/search?q=repo%3ACartoDB%2Fcartodb+plpython&type=code</a><o:p></o:p></p></div><div><p class=MsoNormal>- crankshaft ( CARTO Spatial Analysis extension for PostgreSQL ) <a href="https://github.com/CartoDB/crankshaft">https://github.com/CartoDB/crankshaft</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>5.) (tutorial) Map Matching in PostGIS with Valhalla and PL/Python<o:p></o:p></p></div><div><p class=MsoNormal><a href="https://gis-ops.com/map-matching-postgis-plpython/">https://gis-ops.com/map-matching-postgis-plpython/</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>6.) Apache MADlib ( Graph, Deep learning, Statistics, .. ) <o:p></o:p></p></div><div><p class=MsoNormal><a href="https://madlib.apache.org/docs/latest/index.html">https://madlib.apache.org/docs/latest/index.html</a> ( mostly plpythonu based ) <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>....<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Be careful:<o:p></o:p></p></div><div><p class=MsoNormal><i>"</i><i><span style='font-size:11.0pt;font-family:"Arial",sans-serif;color:black'>PL/Python is only available as an <span class=gmail-quote>“untrusted”</span> language, meaning it does not offer any way of restricting what users can do in it and is therefore named </span></i><code><i><span style='font-size:11.0pt;color:black'>plpython3u</span></i></code><i><span style='font-size:11.0pt;font-family:"Arial",sans-serif;color:black'>. A trusted variant </span></i><code><i><span style='font-size:11.0pt;color:black'>plpython</span></i></code><i><span style='font-size:11.0pt;font-family:"Arial",sans-serif;color:black'> might become available in the future if a secure execution mechanism is developed in Python. The writer of a function in untrusted PL/Python must take care that the function cannot be used to do anything unwanted, since it will be able to do anything that could be done by a user logged in as the database administrator. Only superusers can create functions in untrusted languages such as </span></i><code><i><span style='font-size:11.0pt;color:black'>plpython3u</span></i></code><i><span style='font-size:11.0pt;font-family:"Arial",sans-serif;color:black'>."</span></i><o:p></o:p></p></div><div><p class=MsoNormal><a href="https://www.postgresql.org/docs/15/plpython.html">https://www.postgresql.org/docs/15/plpython.html</a><o:p></o:p></p></div><div><p class=MsoNormal><a href="https://dba.stackexchange.com/questions/132352/why-is-pl-python-untrusted">https://dba.stackexchange.com/questions/132352/why-is-pl-python-untrusted</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Regards,<o:p></o:p></p></div><div><p class=MsoNormal> Imre<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Shaozhong SHI <<a href="mailto:shishaozhong@gmail.com">shishaozhong@gmail.com</a>> ezt írta (időpont: 2022. dec. 3., Szo, 21:59):<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><p class=MsoNormal>It will be interesting to see novel Python functions in PostGIS.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Regards,<o:p></o:p></p></div><div><p class=MsoNormal>David<o:p></o:p></p></div><p class=MsoNormal>_______________________________________________<br>postgis-users mailing list<br><a href="mailto:postgis-users@lists.osgeo.org" target="_blank">postgis-users@lists.osgeo.org</a><br><a href="https://lists.osgeo.org/mailman/listinfo/postgis-users" target="_blank">https://lists.osgeo.org/mailman/listinfo/postgis-users</a><o:p></o:p></p></blockquote></div></div></div></body></html>