Add documentation about when trigger values NEW/OLD return NULL.

Jeff Davis

diff --git a/doc/src/sgml/plpgsql.sgml b/doc/src/sgml/plpgsql.sgml
index e47142078c0eefa4b376bb718c618b1c0f9932f9..6b8c6c832c1e62d8d3726782862bd4307f8ca2f7 100644 (file)
--- a/doc/src/sgml/plpgsql.sgml
+++ b/doc/src/sgml/plpgsql.sgml
@@ -1,4 +1,4 @@
-
+
 
 
   <application>PL/pgSQL</application> - <acronym>SQL</acronym> Procedural Language
@@ -3036,7 +3036,8 @@ RAISE unique_violation USING MESSAGE = 'Duplicate user ID: ' || user_id;
       
        Data type RECORD; variable holding the new
        database row for INSERT/UPDATE operations in row-level
-       triggers. This variable is NULL in statement-level triggers.
+       triggers. This variable is NULL in statement-level triggers
+       and for DELETE operations.
       
      
     
@@ -3047,7 +3048,8 @@ RAISE unique_violation USING MESSAGE = 'Duplicate user ID: ' || user_id;
       
        Data type RECORD; variable holding the old
        database row for UPDATE/DELETE operations in row-level
-       triggers. This variable is NULL in statement-level triggers.
+       triggers. This variable is NULL in statement-level triggers
+       and for INSERT operations.