Constant Folder Rule does not report change

What steps will reproduce the problem?
1. Turn on printing for applied query rules.
2. Run this query: 
{ "overlap1": get-overlapping-interval(interval-from-time(time("11:23:39"), 
time("11:27:19")), interval-from-time(time("12:23:39"), time("23:18:00"))), 
  "overlap2": get-overlapping-interval(interval-from-time(time("12:23:39"), time("18:27:19")), interval-from-time(time("07:19:39"), time("09:18:00"))),
  "overlap3": get-overlapping-interval(interval-from-date(date("1980-11-30"), date("1999-09-09")), interval-from-date(date("2013-01-01"), date("2014-01-01"))),
  "overlap4": get-overlapping-interval(interval-from-date(date("1980-11-30"), date("2099-09-09")), interval-from-date(date("2013-01-01"), date("2014-01-01"))),
  "overlap5": get-overlapping-interval(interval-from-datetime(datetime("1844-03-03T11:19:39"), datetime("2000-10-30T18:27:19")), interval-from-datetime(datetime("1989-03-04T12:23:39"), datetime("2009-10-10T23:18:00"))),
  "overlap6": get-overlapping-interval(interval-from-datetime(datetime("1989-03-04T12:23:39"), datetime("2000-10-30T18:27:19")), interval-from-datetime(datetime("1844-03-03T11:19:39"), datetime("1888-10-10T23:18:00")))  }

What is the expected output? What do you see instead?
The constant folding rule should show that it folded the 
"asterix:get-overlapping-interval" function. Yet, the query plan is just 
updated without registering that the constant folding rule altered the plan.

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Original issue reported on code.google.com by ecarm...@ucr.edu on 19 Mar 2015 at 4:52

ilovesoup / asterixdb

Constant Folder Rule does not report change #866