Pas de underscore si table_prefix est vide.

ecrire/inc_db_mysql.php3

@@ -90,6 +90,9 @@ function spip_mysql_select($select, $from, $where,
 // Passage d'une requete standardisee
 //
 function traite_query($query) {
+	if ($GLOBALS['table_prefix']) $table_pref = $GLOBALS['table_prefix']."_";
+	else $table_pref = "";
+
 	if ($GLOBALS['mysql_rappel_connexion'] AND $db = $GLOBALS['spip_mysql_db'])
 		$db = '`'.$db.'`.';
 
@@ -99,14 +102,14 @@ function traite_query($query) {
 			$suite = strstr($query, $regs[0]);
 			$query = substr($query, 0, -strlen($suite));
 		}
-		$query = preg_replace('/([,\s])spip_/', '\1'.$db.$GLOBALS['table_prefix'].'_', $query) . $suite;
+		$query = preg_replace('/([,\s])spip_/', '\1'.$db.$table_pref, $query) . $suite;
 	}
 	else {
 		if (eregi('[[:space:]](VALUES|WHERE)[[:space:]]', $query, $regs)) {
 			$suite = strstr($query, $regs[0]);
 			$query = substr($query, 0, -strlen($suite));
 		}
-		$query = ereg_replace('([[:space:],])spip_', '\1'.$db.$GLOBALS['table_prefix'].'_', $query) . $suite;
+		$query = ereg_replace('([[:space:],])spip_', '\1'.$db.$table_pref, $query) . $suite;
 	}
 
 	return $query;

ecrire/optimiser.php3

@@ -324,8 +324,10 @@ function optimiser_base() {
 	//
 	// MySQL
 	//
+	if ($GLOBALS['table_prefix']) $table_pref = $GLOBALS['table_prefix']."_";
+	else $table_pref = "";
 
-	$query = "SHOW TABLES LIKE '".$GLOBALS['table_prefix']."_%'";
+	$query = "SHOW TABLES LIKE '$table_pref%'";
 	$result = spip_query($query);
 	while ($row = spip_fetch_array($result)) $tables[] = $row[0];