Description:
------------
pg_convert, pg_update, pg_insert 
can't handle inputs that reference enum columns.

syntactically enum columns can be treated like string columns.



Test script:
---------------
<?php
function sql_assert($c,$q)
{
	$r=pg_query($c,$q);
	if($r)
	{
		pg_free_result($r);
		return;
	}
	echo "FAILED: $q\nERROR:".pg_last_error($c)."\n";
	echo "can't initialise the test environment - giving up";
	die(1);
}
$con=pg_connect("host=127.0.0.1 user=test password=php5 dbname=phptest");
sql_assert($con,"drop type if exists enumtest cascade;");
sql_assert($con," create type enumtest as enum ( 'alpha', 'beta', 'gamma' );");
sql_assert($con," drop table if exists e_test;");
sql_assert($con," create table e_test( id integer, label text, num enumtest );");
print_r(pg_convert($con,"e_test",array('id'=>11,'label'=>'fail','num'=>'gamma')));


Expected result:
----------------
some text starting with the word Array

Actual result:
--------------
nothing.