schema level variables and deferrable unique constraints

<br /><font face="sans-serif" size="2">sorry my last mail went incomplete</font><br /><font color="#800080"
face="sans-serif"size="1">please read through this and ignore my last mail</font><br /><font color="#800080"
face="sans-serif"size="1">paraM</font><br /><font color="#800080" face="sans-serif" size="1"> </font><br /><font
color="#800080"face="sans-serif" size="1">----- Forwarded by Paramveer Singh/Trilogy on 20/09/2004 05:21 PM
-----</font><br/><table width="100%"><tr valign="top"><td></td><td><font face="sans-serif" size="1"><b>Paramveer
Singh</b></font><p><fontface="sans-serif" size="1">20/09/2004 05:56 PM</font><br /></td><td><font face="Arial"
size="1">       </font><br /><font face="sans-serif" size="1">        To:        pgsql-hackers@postgresql.org</font><br
/><fontface="sans-serif" size="1">        cc:        </font><br /><font face="sans-serif" size="1">        Subject:    
  schema level variables and deferrable unique constraints</font></td></tr></table><br /><br /><font face="sans-serif"
size="2">hi!</font><br/><font face="sans-serif" size="2">I apologize for mailing on the hackers list but I posted on
thegeneral list and did not get a good answer.</font><br /><font face="sans-serif" size="2">I have two independent
issues,but am addressing them together.</font><br /><br /><font face="sans-serif" size="2">1.</font><br /><font
face="sans-serif"size="2">Oracle has package level variables which are not mappable to any postgres
equivalent.</font><br/><font face="sans-serif" size="2">could we have something like schema scope variables which could
bedirectly referred from let's say plpgsql functions?</font><br /><font face="sans-serif" size="2">Can someone give me
somepointers on how to go about implementing this?</font><br /><br /><font face="sans-serif" size="2">2.</font><br
/><fontface="sans-serif" size="2">Postgres does not support deferrable unique constraints.</font><br /><font
face="sans-serif"size="2">we would however like to support this especially as some updates give non-standard behavior
becauseof this.</font><br /><font face="sans-serif" size="2">where do I start reading up on what all needs to be done
tosupport this?</font><br /><font face="sans-serif" size="2">I have no idea about the postgres codebase. I only
understandthe implementation of the plpgsql library.</font><br /><font face="sans-serif" size="2">Any pointers on where
tostart would be helpful</font><br /><br /><font face="sans-serif" size="2">thanks</font><br /><font face="sans-serif"
size="2">paraM</font><br/>