feat: support pivot and unpivot #17946
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DataFrame API
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Which issue does this PR close?
pivot&unpivot(melt) to DataFrame #12907Rationale for this change
currently pivot and unpivot are not supported.
https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select-pivot.html
https://spark.apache.org/docs/latest/sql-ref-syntax-qry-select-unpivot.html
What changes are included in this PR?
support pivot and unpivot.
Are these changes tested?
UT
Are there any user-facing changes?
No