About debugging trigger

<div class="Section1"><p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:
12.0pt">Hi,<br /><br /> I have a question about how to insert standard output statement in trigger for debugging
purpose.<br /><br /> I have tried using the following:</span></font><ul type="disc"><li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;   mso-list:l0 level1 lfo1"><font face="Times New Roman"
size="3"><spanstyle="font-size:12.0pt">echo 'show debug message' ;</span></font><li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;   mso-list:l0 level1 lfo1"><font face="Times New Roman"
size="3"><spanstyle="font-size:12.0pt">echo "show debug message" ; </span></font><li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;   mso-list:l0 level1 lfo1"><font face="Times New Roman"
size="3"><spanstyle="font-size:12.0pt">print("show debug message");</span></font><li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;   mso-list:l0 level1 lfo1"><font face="Times New Roman"
size="3"><spanstyle="font-size:12.0pt">print('show debug message');</span></font><li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;   mso-list:l0 level1 lfo1"><font face="Times New Roman"
size="3"><spanstyle="font-size:12.0pt">dbms_output.put_line('show debug message');</span></font><li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;   mso-list:l0 level1 lfo1"><font face="Times New Roman"
size="3"><spanstyle="font-size:12.0pt">dbms_output.put_line("show debug message");</span></font></ul><p
class="MsoNormal"><fontface="Times New Roman" size="3"><span style="font-size: 
12.0pt">However, I got the following error message: </span></font><ul type="disc"><li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;   mso-list:l1 level1 lfo2"><font face="Times New Roman"
size="3"><spanstyle="font-size:12.0pt">ERROR:  syntax error at or near "echo" at character 1<br /> QUERY:  echo 'show
debugmessage'</span></font><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
mso-list:l1level1 lfo2"><font face="Times New Roman" size="3"><span style="font-size:12.0pt">ERROR:  syntax error at or
near"print" at character 1<br /> QUERY:  print('show debug message') </span></font><li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;   mso-list:l1 level1 lfo2"><font face="Times New Roman"
size="3"><spanstyle="font-size:12.0pt">ERROR:  syntax error at or near "dbms_output" at character 1<br /> QUERY: 
dbms_output.put_line("showdebug message")</span></font></ul><p class="MsoNormal"><font face="Times New Roman"
size="3"><spanstyle="font-size: 
12.0pt"><br /> I know that in Oracle, the way to insert standard output statement in trigger is using
dbms_output.put_line()method, but it doesn't seem to work in pgadmin. <br /><br /> I have already checked the
frequentlyasked questions list as well as the pgAdmin documentation for a solution and I also have tried searching
Google,however I can not find a solution for it. Please help when you get a chance! <br /><br /> Thank you in
advance,</span></font><pclass="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 
12.0pt"> </span></font><p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:
12.0pt">Michael</span></font><font face="Arial" size="2"><span style="font-size:
10.0pt;font-family:Arial"></span></font></div>