Add paragraph about ON CONFLICT interaction with partitioning.

Author: Peter Geoghegan and Andres Freund
Discussion: CAM3SWZScpWzQ-7EJC77vwqzZ1GO8GNmURQ1QqDQ3wRn7AbW1Cg@mail.gmail.com,
    CAHGQGwFUCWwSU7dtc2aRdRk73ztyr_jY5cPOyts+K8xKJ92X4Q@mail.gmail.com
Backpatch: 9.5, where UPSERT was introduced

diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml
index fe5a076fe120da59ca2d7e96ecd59f6039db43f7..58a2e9b36e55adbe31db7ba6a6ecf55e90e7005d 100644 (file)
--- a/doc/src/sgml/ddl.sgml
+++ b/doc/src/sgml/ddl.sgml
@@ -3246,6 +3246,15 @@ ANALYZE measurement;
      
     
 
+    
+     
+      INSERT statements with ON CONFLICT
+      clauses are unlikely to work as expected, as the ON CONFLICT
+      action is only taken in case of unique violations on the specified
+      target relation, not its child relations.
+     
+    
+