message: Add percentage test
diff: @@ -49,3 +49,27 @@ EXECUTE v1(5)
  9998
  9997
  9996
  +
  +statement ok
  +PREPARE v1 AS SELECT * FROM generate_series(0, 10000, 1) tbl(i) ORDER BY i DESC LIMIT ?::VARCHAR %
  +
  +query I
  +EXECUTE v1('0.05')
  +----
  +10000
  +9999
  +9998
  +9997
  +9996
  +
  +statement ok
  +CREATE TABLE doubles AS SELECT 0.05 d
  +
  +query I
  +SELECT * FROM generate_series(0, 10000, 1) tbl(i) ORDER BY i DESC LIMIT (SELECT d FROM doubles) %
  +----
  +10000
  +9999
  +9998
  +9997
  +9996
  