Mention that when alter rewrites a table, indexes are also rebuilt.

diff --git a/doc/src/sgml/ref/alter_table.sgml b/doc/src/sgml/ref/alter_table.sgml
index 85f7c75c999bfc37d9dfc7cc90f9515bd7a1f89e..833753aedeb3f2ecb445621265048dbe11b4857c 100644 (file)
--- a/doc/src/sgml/ref/alter_table.sgml
+++ b/doc/src/sgml/ref/alter_table.sgml
@@ -1,5 +1,5 @@
 
 
@@ -689,8 +689,8 @@ ALTER TABLE name
 
    
     Adding a column with a non-null default or changing the type of an
-    existing column will require the entire table to be rewritten.  This
-    might take a significant amount of time for a large table; and it will
+    existing column will require the entire table and indexes to be rewritten.
+    This might take a significant amount of time for a large table; and it will
     temporarily require double the disk space.  Adding or removing a system
     oid column likewise requires rewriting the entire table.