[fix](Nereids) generating function should not folding to NullLiteral (#29003) #29511
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…pache#29003) should not fold table generating function to null when do constant folding. we should remove Generate node and replaced it by project later.
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pick from master
PR #29003
commit: f371528
should not fold table generating function to null when do constant folding. we should remove Generate node and replaced it by project later.
Proposed changes
Issue Number: close #xxx
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