Index: src/sqlite.h.in
==================================================================
--- src/sqlite.h.in
+++ src/sqlite.h.in
@@ -3066,10 +3066,12 @@
 ** respectively.
 ** In other words, the initial ":" or "$" or "@" or "?"
 ** is included as part of the name.)^
 ** ^Parameters of the form "?" without a following integer have no name
 ** and are referred to as "nameless" or "anonymous parameters".
+** ^Any parameter that is optimized out of the prepared statement by the 
+** query planner becomes a nameless or anonymous parameter.
 **
 ** ^The first host parameter has an index of 1, not 0.
 **
 ** ^If the value N is out of range or if the N-th parameter is
 ** nameless, then NULL is returned.  ^The returned string is