Update info about relkind and pg_type entries for composite-types patch.

diff --git a/doc/src/sgml/catalogs.sgml b/doc/src/sgml/catalogs.sgml
index 58027891c8273be8d3f212935bf8ca1ba335936c..a27441a409091da36f6f414d99b5d79de2f40248 100644 (file)
--- a/doc/src/sgml/catalogs.sgml
+++ b/doc/src/sgml/catalogs.sgml
@@ -1,6 +1,6 @@
 
 
 
@@ -890,11 +890,12 @@
   pg_class
 
   
-   pg_class catalogs tables and mostly
+   pg_class catalogs tables and most
    everything else that has columns or is otherwise similar to a
    table.  This includes indexes (but see also
    pg_index), sequences, views, and some
-   kinds of special relation.  Below, when we mean all of these
+   kinds of special relation; see relkind.
+.  Below, when we mean all of these
    kinds of objects we speak of relations.  Not all
    fields are meaningful for all relation types.
   
@@ -957,7 +958,7 @@
       relfilenode
       oid
       
-      Name of the on-disk file of this relation
+      Name of the on-disk file of this relation; 0 if none
      
 
      
@@ -1030,7 +1031,7 @@
       
       
        'r' = ordinary table, 'i' = index, 'S' = sequence, 'v' = view,
-       's' = special, 't' = secondary TOAST table
+       'c' = composite type, 's' = special, 't' = TOAST table
       
      
 
@@ -3127,8 +3128,9 @@
   
    This catalog stores information about data types.  Scalar types
    (base types) are created with CREATE TYPE.
-   A complex type is also created for each table in the database, to
+   A complex type is automatically created for each table in the database, to
    represent the row structure of the table.  It is also possible to create
+   complex types with CREATE TYPE AS, and
    derived types with CREATE DOMAIN.
   
 
@@ -3242,9 +3244,11 @@
       
        If this is a complex type (see
        typtype), then this field points to
-       the pg_class entry that defines the
-       corresponding table. A table could theoretically be used as a
-       composite data type, but this is only partly functional.
+       the pg_class entry that defines the
+       corresponding table.  (For a free-standing composite type, the
+       pg_class entry doesn't really represent
+       a table, but it is needed anyway for the type's
+       pg_attribute entries to link to.)
        Zero for non-complex types.