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--></style></div><div>Hi,</div><div><br data-mce-bogus="1"></div><div>Of course if you select * from a table where a column "the_geom" exists and perform in the same time some geometry computation with an alias named "the_geom" (i.e. "AS the_geom"), then you have two columns named "the_geom".</div><div><br data-mce-bogus="1"></div><div>Best regards,</div><div>Hugues</div><div><br></div><div data-marker="__SIG_PRE__"><br></div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>De: </b>"paul malm" <paul.malm@lfv.se><br><b>À: </b>"PostGIS Users Discussion" <postgis-users@lists.osgeo.org><br><b>Envoyé: </b>Jeudi 4 Juillet 2019 14:26:07<br><b>Objet: </b>Re: [postgis-users] creating points from polygons, storing all attributes<br></div><div><br></div><div data-marker="__QUOTED_TEXT__">
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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Thanks, I’ve tried that but get this error:</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.5pt;font-family:Consolas;color:#222222;background:white">ERROR: column "the_geom" is specified more than once SQL state: 42701</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.5pt;font-family:Consolas;color:#222222;background:white">/Paul</span><span lang="EN-US" style="color:#1F497D"></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:SV">Från:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:SV"> postgis-users [mailto:postgis-users-bounces@lists.osgeo.org]
<b>För </b>Derek Watling<br>
<b>Skickat:</b> den 4 juli 2019 13:55<br>
<b>Till:</b> PostGIS Users Discussion<br>
<b>Ämne:</b> Re: [postgis-users] creating points from polygons, storing all attributes</span></p>
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<p class="MsoNormal"> </p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">CREATE TABLE NewPointLayer AS SELECT
<span style="background:yellow;mso-highlight:yellow">*,</span> ST_PointOnSurface(the_geom)::geometry(Point,32632) AS the_geom FROM OldPolygonLayer</span><span lang="EN-ZA"></span></p>
<p class="MsoNormal"><span lang="EN-ZA"> </span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:EN-ZA">From:</span></b><span lang="EN-US" style="mso-fareast-language:EN-ZA"> postgis-users <postgis-users-bounces@lists.osgeo.org>
<b>On Behalf Of </b>paul.malm@lfv.se<br>
<b>Sent:</b> Thursday, 04 July 2019 13:47<br>
<b>To:</b> postgis-users@lists.osgeo.org<br>
<b>Subject:</b> [postgis-users] creating points from polygons, storing all attributes</span></p>
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<p class="MsoNormal"><span lang="EN-ZA"> </span></p>
<p class="MsoNormal"><span lang="EN-US">Hi,</span></p>
<p class="MsoNormal"><span lang="EN-US">I would like to create a point table from a polygon table. One point in each polygon</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">Query = CREATE TABLE NewPointLayer AS SELECT ST_PointOnSurface(the_geom)::geometry(Point,32632) AS the_geom FROM OldPolygonLayer</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE"> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">But how do I write the query to get all the attributes from OldPolygonLayer to the NewPointLayer?</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE"> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="background:#E8F2FE">Thanks in advance,</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">Paul</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:#BB005E;background:#E8F2FE"> </span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
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