## Proposed changes
Now, Agg's child predicates will not spread to agg.
For example:
select a, sum(b)
from (
select a,b from t where a = 1 and b = 2
) t
group by a
`a = 1` in scan can be propagated to `a` of agg.
But `b = 2` in scan can not be propagated to `sum(b)` of agg.
Issue Number: #38905
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Co-authored-by: liutang123 <liulijia@gmail.com>