1. refactor in-predicate filter estimation example: A in (1, 2, 3, 4) after in-preidcate filter, A.stats.max<=4 and A.stats.min>=1 2. maintain minExpr and maxExpr in in-predicate stats derive
1. refactor in-predicate filter estimation example: A in (1, 2, 3, 4) after in-preidcate filter, A.stats.max<=4 and A.stats.min>=1 2. maintain minExpr and maxExpr in in-predicate stats derive