<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">You’re going to want to chain a ST_DumpRings (turn polygons to rings) to an ST_Dump (turn mutlis to singletons) and then look at the dump ring composite type and omit ring 1 from the relation…<div class=""><br class=""></div><div class="">Something like:</div><div class=""><br class=""></div><div class=""><br class="">WITH <br class="">poly AS (<br class=""> SELECT 'MULTIPOLYGON(((0 0, 0 10, 10 10, 10 0, 0 0), (4 4, 4 5, 5 5, 5 4, 4 4)))'::geometry AS g<br class=""> ),<br class="">rings AS (<br class=""> SELECT (ST_DumpRings((ST_Dump(g)).geom)).* FROM poly<br class=""> )<br class="">SELECT * FROM rings<br class="">WHERE path != '{0}';<br class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Aug 13, 2019, at 7:39 AM, <<a href="mailto:paul.malm@lfv.se" class="">paul.malm@lfv.se</a>> <<a href="mailto:paul.malm@lfv.se" class="">paul.malm@lfv.se</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Hi, I would like to create a table with all the interior rings (islands) from a table with multipolygons lakes.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">I’ve only come this far:<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">CREATE TABLE "islands" AS SELECT (ST_InteriorRingn(the_geom, 2)).geometry AS the_geom FROM public."lakes";<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">But this is only collecting the first island in each lake.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Thankful for any suggestions.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">/Paul<span class="Apple-converted-space"> </span><o:p class=""></o:p></span></div></div><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); 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