visitor.getConditions()对于某些特殊的值无法解析

l_shipdate <= date '1998-12-01' - interval '90' day
对于该查询条件，visitor.getConditions().getvalues()得到的值为null

Start by reproducing the reported condition with `l_shipdate <= date '1998-12-01' - interval '90' day` and inspect how `visitor.getConditions().getValues()` handles the date and interval expression. Done means this condition is parsed successfully and the returned values are no longer null.

Written by the indexing model from the issue text.