maropu commented on a change in pull request #24118: [SPARK-26736][SQL] if 
filter condition has rand() function it does not do partition prunning
URL: https://github.com/apache/spark/pull/24118#discussion_r266292141
 
 

 ##########
 File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
 ##########
 @@ -63,7 +63,7 @@ object PhysicalOperation extends PredicateHelper {
         val substitutedFields = 
fields.map(substitute(aliases)).asInstanceOf[Seq[NamedExpression]]
         (Some(substitutedFields), filters, other, 
collectAliases(substitutedFields))
 
-      case Filter(condition, child) if condition.deterministic =>
+      case Filter(condition, child) if condition.deterministic || 
condition.isInstanceOf[And] =>
 
 Review comment:
   I think this pattern should not return non-determinisitc exprs, but this 
current change does so, right?
   Can we modify code to extract deterministic exprs in line 67-69?
   

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