docs: mention CREATE TABLE LIKE linkage using INCLUDING DEFAULTS

Mention that CREATE TABLE LIKE INCLUDING DEFAULTS creates a link between
the original and new tables if a default function modifies the database,
like nextval().

diff --git a/doc/src/sgml/ref/create_table.sgml b/doc/src/sgml/ref/create_table.sgml
index a422edd2313dfcf51db3fa53d272227dec5f844c..e0b8a4ecaf60a0595f2e340aa4b9fc1d5a1d2812 100644 (file)
--- a/doc/src/sgml/ref/create_table.sgml
+++ b/doc/src/sgml/ref/create_table.sgml
@@ -329,7 +329,10 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXI
      
      
       Default expressions for the copied column definitions will only be
-      copied if INCLUDING DEFAULTS is specified.  The
+      copied if INCLUDING DEFAULTS is specified. 
+      Defaults that call database-modification functions, like
+      nextval, create a linkage between the original and
+      new tables.  The
       default behavior is to exclude default expressions, resulting in the
       copied columns in the new table having null defaults.