Fix serde of window lead/lag defaults#20608
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## Which issue does this PR close? - Closes apache#20607. ## Rationale for this change Don't lose values in serde ## What changes are included in this PR? Preservation of window function arguments, particularly default value ## Are these changes tested? A RTT is included ## Are there any user-facing changes? Users with distributed query engines such as Ballista will have more queries work than before **note**: AI was used to create this PR
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Which issue does this PR close?
Rationale for this change
Don't lose values in serde
What changes are included in this PR?
Preservation of window function arguments, particularly default value
Are these changes tested?
A RTT is included
Are there any user-facing changes?
Users with distributed query engines such as Ballista will have more queries work than before
note: AI was used to create this PR