<div xmlns="http://www.w3.org/1999/xhtml"><div style="color:rgb(0,0,0);font-family:Arial,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;text-align:start;text-transform:none;white-space:normal;background-color:rgb(255,255,255);"><div>Problem solved.</div><div>The reason was that I used pgcli.</div><div>When I use psql, everything works as it should.</div><div>I assume that pgcli chooses transaction isolation level by itself.</div></div><div style="color:rgb(0,0,0);font-family:Arial,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;text-align:start;text-transform:none;white-space:normal;background-color:rgb(255,255,255);"> </div><div style="color:rgb(0,0,0);font-family:Arial,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;text-align:start;text-transform:none;white-space:normal;background-color:rgb(255,255,255);"><a target="_blank" style="color:rgb(153,0,153);" rel="noopener noreferrer" href="https://www.sql.ru/forum/1310005/funkciya-v-pg11-2-ne-zapuskaetsya-s-urovnem-izolyacii-serializable">https://www.sql.ru/forum/1310005/funkciya-v-pg11-2-ne-zapuskaetsya-s-urovnem-izolyacii-serializable</a></div><div style="color:rgb(0,0,0);font-family:Arial,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;text-align:start;text-transform:none;white-space:normal;background-color:rgb(255,255,255);"> </div><div style="color:rgb(0,0,0);font-family:Arial,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;text-align:start;text-transform:none;white-space:normal;background-color:rgb(255,255,255);">Thank you!</div></div><div><br /></div><div><br /></div><div>08.03.2019, 22:36, "David G. Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>:</div><blockquote type="cite"><p>On Fri, Mar 8, 2019 at 11:11 AM PG Bug reporting form<br /><<a href="mailto:noreply(at)postgresql(dot)org">noreply(at)postgresql(dot)org</a>> wrote:<br /></p><blockquote><br /> The following bug has been logged on the website:<br /><br /> Bug reference: 15678<br /></blockquote><p><br /></p><blockquote> P.S. If in the future you want to get more sensible error reports, then you<br /> should think about a few examples. People understand examples better than<br /> lengthy documentation descriptions.<br /></blockquote><p><br />Likewise a self-contained executable example makes diagnosing bug<br />reports considerably easier. As Andres said this is likely a caching<br />issue related to when changed settings take effect after making a<br />physical change.<br /><br />David J.<br /></p></blockquote>