Description:
------------
Using table aliases when retrieving a column value (for the purpose of resolving column name ambiguity) is producing an "invalid column name" error.  

This produces the error:
$sql = "select t1.c1, t2.c1 from..."
$intValue1 = pg_fetch_result($rs, $intRow, 't1.c1');
$intValue2 = pg_fetch_result($rs, $intRow, 't2.c1');

This is ambiguous but does not produce an error:
$sql = "select t1.c1, t2.c1 from..."
$intValue1 = pg_fetch_result($rs, $intRow, 'A');
$intValue2 = pg_fetch_result($rs, $intRow, 'B');

This is valid:
$sql = "select t1.c1 as A, t2.c1 as B from..."
$intValue1 = pg_fetch_result($rs, $intRow, 'A');
$intValue2 = pg_fetch_result($rs, $intRow, 'B');




PostGres: 8.0.3

php.ini diff:
ShortTags = Off


Reproduce code:
---------------
$sql = "select t1.c1, t2.c1 from table1 t1, table2 t2";
$rs = pg_query($sql);
$intValue = pg_fetch_result($rs, $intRow, 't1.c1');



Expected result:
----------------
I expect to be able to retrieve the columns using the explicit name that includes the table alias.

Previous versions did not produce this error.  I also ran this same test using mySql (mysql_fetch) which does not produce the error.

I also tested this which does not produce the error: 
$row = pg_fetch_assoc($rs);
$intValue1 = $row['t1.c1']
$intValue2 = $row['t2.c1']



Actual result:
--------------
[client 127.0.0.2] PHP Warning: pg_fetch_result() [function.pg-fetch-result]: Bad column offset specified in /home/spr/Documents/web/spr/spr4/web/10dev/modules/datasvcs.php on line 210