soumyakanti3578 commented on code in PR #5196:
URL: https://github.com/apache/hive/pull/5196#discussion_r1939964029


##########
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/views/HivePushdownSnapshotFilterRule.java:
##########
@@ -80,7 +82,12 @@ private HivePushdownSnapshotFilterRule(Config config) {
   @Override
   public void onMatch(RelOptRuleCall call) {
     HiveFilter filter = call.rel(0);
-    RexNode newCondition = filter.getCondition().accept(new 
SnapshotIdShuttle(call.builder().getRexBuilder(), call.getMetadataQuery(), 
filter));
+    RexNode expandedCondition = RexUtil.expandSearch(
+        filter.getCluster().getRexBuilder(), null, filter.getCondition()
+    );

Review Comment:
   I added this because of the following failure:
   ```
   [ERROR] Failures:
   [ERROR]   
TestMaterializedViewRebuild.testSecondRebuildCanBeIncrementalAfterMajorCompaction:127
 cannot convert SARG literal to class java.lang.Long
   ```
   This CBO plan for which this fails is:
   ```
   HiveProject(a=[$0], b=[$1], c=[$2])
     HiveFilter(condition=[SEARCH($0, Sarg[(0..+∞); NULL AS TRUE])])
       HiveTableScan(table=[[default, t1]], table:alias=[t1])
   ```
   The plan is generated while running the query: 
https://github.com/apache/hive/blob/84cdf6003678ed673d59d223ef7f4dac1aa6fdc0/itests/hive-unit/src/test/java/org/apache/hadoop/hive/ql/txn/compactor/TestMaterializedViewRebuild.java#L127
   
   The root cause of the issue is that we are trying to get a `Sarg` value as 
`Long` here:
   
https://github.com/apache/hive/blob/84cdf6003678ed673d59d223ef7f4dac1aa6fdc0/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/views/HivePushdownSnapshotFilterRule.java#L120
   
   Let me know if the diff is fine or if we should add an `if` check for `Sarg` 
and extract the snapshotId from it.



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