add indexUnique()

diff --git a/includes/DatabasePostgreSQL.php b/includes/DatabasePostgreSQL.php
index 75c7fe4..736822f 100644 (file)
--- a/includes/DatabasePostgreSQL.php
+++ b/includes/DatabasePostgreSQL.php
@@ -171,6 +171,18 @@ class DatabasePgsql extends Database {
                return false;
        }
 
+       function indexUnique ($table, $index, $fname = 'Database::indexUnique' ) {
+               $sql = "SELECT indexname FROM pg_indexes WHERE tablename='{$table}'".
+                       " AND indexdef LIKE 'CREATE UNIQUE%({$index})'";
+               $res = $this->query( $sql, $fname );
+               if ( !$res )
+                       return NULL;
+               while ($row = $this->fetchObject( $res )) 
+                       return true;
+               return false;
+               
+       }
+
        function fieldInfo( $table, $field ) {
                wfDebugDieBacktrace( 'Database::fieldInfo() error : mysql_fetch_field() not implemented for postgre' );
                /*