[opt](Nereids) add where Null rule to create empty relation as where false (#38135) #38361
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…false (apache#38135) explain shape plan select * from table2 where Null; explain shape plan select * from table2 where false; in this case, null literal can be regard as same as false literal
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cherry-pick: #38135
explain shape plan select * from table2 where Null; explain shape plan select * from table2 where false; in this case, null literal can be regard as same as false literal
Proposed changes
Issue Number: close #xxx