Index: database.mysql.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/database.mysql.inc,v
retrieving revision 1.66.2.2
diff -u -r1.66.2.2 database.mysql.inc
--- database.mysql.inc	19 Oct 2007 21:49:26 -0000	1.66.2.2
+++ database.mysql.inc	25 Feb 2008 16:45:04 -0000
@@ -435,7 +435,7 @@
 function db_distinct_field($table, $field, $query) {
   $field_to_select = 'DISTINCT('. $table .'.'. $field .')';
   // (?<!text) is a negative look-behind (no need to rewrite queries that already use DISTINCT).
-  return preg_replace('/(SELECT.*)(?:'. $table .'\.|\s)(?<!DISTINCT\()(?<!DISTINCT\('. $table .'\.)'. $field .'(.*FROM )/AUsi', '\1 '. $field_to_select .'\2', $query);
+  return preg_replace('/(SELECT.*)(?:\b'. $table .'\.|\s)(?<!DISTINCT\()(?<!DISTINCT\(\b'. $table .'\.)'. $field .'(.*FROM )/AUsi', '\1 '. $field_to_select .'\2', $query);
 }
 
 /**
Index: database.mysqli.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/database.mysqli.inc,v
retrieving revision 1.32.2.1
diff -u -r1.32.2.1 database.mysqli.inc
--- database.mysqli.inc	19 Oct 2007 21:49:26 -0000	1.32.2.1
+++ database.mysqli.inc	25 Feb 2008 16:45:04 -0000
@@ -415,7 +415,7 @@
 function db_distinct_field($table, $field, $query) {
   $field_to_select = 'DISTINCT('. $table .'.'. $field .')';
   // (?<!text) is a negative look-behind (no need to rewrite queries that already use DISTINCT).
-  return preg_replace('/(SELECT.*)(?:'. $table .'\.|\s)(?<!DISTINCT\()(?<!DISTINCT\('. $table .'\.)'. $field .'(.*FROM )/AUsi', '\1 '. $field_to_select .'\2', $query);
+  return preg_replace('/(SELECT.*)(?:\b'. $table .'\.|\s)(?<!DISTINCT\()(?<!DISTINCT\(\b'. $table .'\.)'. $field .'(.*FROM )/AUsi', '\1 '. $field_to_select .'\2', $query);
 }
 
 /**
Index: database.pgsql.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/database.pgsql.inc,v
retrieving revision 1.43.2.1
diff -u -r1.43.2.1 database.pgsql.inc
--- database.pgsql.inc	19 Oct 2007 21:49:26 -0000	1.43.2.1
+++ database.pgsql.inc	25 Feb 2008 16:45:04 -0000
@@ -420,7 +420,7 @@
 function db_distinct_field($table, $field, $query) {
   $field_to_select = 'DISTINCT ON ('. $table .'.'. $field .") $table.$field";
   // (?<!text) is a negative look-behind (no need to rewrite queries that already use DISTINCT).
-  $query = preg_replace('/(SELECT.*)(?:'. $table .'\.|\s)(?<!DISTINCT\()(?<!DISTINCT\('. $table .'\.)'. $field .'(.*FROM )/AUsi', '\1 '. $field_to_select .'\2', $query);
+  $query = preg_replace('/(SELECT.*)(?:\b'. $table .'\.|\s)(?<!DISTINCT\()(?<!DISTINCT\(\b'. $table .'\.)'. $field .'(.*FROM )/AUsi', '\1 '. $field_to_select .'\2', $query);
   $query = preg_replace('/(ORDER BY )(?!'.$table.'\.'.$field.')/', '\1'."$table.$field, ", $query);
   return $query;
 }