Github user viirya commented on the pull request:
https://github.com/apache/spark/pull/11647#issuecomment-195229737
For example, this case:
// Common factor elimination for conjunction
case and @ (left And right) =>
val lhs = splitDisjunctivePredicates(left)
val rhs = splitDisjunctivePredicates(right)
....
Because the where clause in TPCDS Q3 has a long pattern like this: (...) ||
(...) || (...) ..........., the recursively running
`splitDisjunctivePredicates` should spend significant time.
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