Add note deprecating use of consrc.

diff --git a/doc/src/sgml/catalogs.sgml b/doc/src/sgml/catalogs.sgml
index f918e6f1bf2ee51a6d245386fe0b7b8ae49b703a..9a8e2ff455b9267a85bb55c8850df14e4fe424e5 100644 (file)
--- a/doc/src/sgml/catalogs.sgml
+++ b/doc/src/sgml/catalogs.sgml
@@ -1,6 +1,6 @@
 
 
 
@@ -1357,6 +1357,15 @@
    
   
 
+  
+   
+    consrc is not updated when referenced objects
+    change; for example, it won't track renaming of columns.  Rather than
+    relying on this field, it's best to use pg_get_constraintdef()
+    to extract the definition of a check constraint.
+   
+  
+
   
    
     pg_class.relchecks needs to agree with the