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  1. Sub-task HIVE-28254
    CBO (Calcite Return Path): Multiple DISTINCT leads to wrong results
  2. Sub-task HIVE-22748
    Remove disabling of IdentityProjectRemover transformation for Return Path
  3. Sub-task HIVE-22638
    Fix insert statement issue with return path
  4. Sub-task HIVE-22536
    Improve return path enabling/disabling
  5. Sub-task HIVE-22369
    Handle HiveTableFunctionScan at return path
  6. Sub-task HIVE-16512
    Join fails on operator return path on CBO
  7. Sub-task HIVE-16492
    Create view doesn't work with Calcite Return path
  8. Sub-task HIVE-14611
    CBO: Calcite Operator To Hive Operator(Calcite Return Path): Support Tablesample clause
  9. Sub-task HIVE-14610
    CBO: Calcite Operator To Hive Operator(Calcite Return Path): Fix wrong result in input30
  10. Sub-task HIVE-14594
    CBO: Calcite Operator To Hive Operator(Calcite Return Path): Fix wrong result in join_filters_overlap
  11. Sub-task HIVE-14590
    CBO (Calcite Return Path) Incorrect result set when limit is present in one of the union branches
  12. Sub-task HIVE-14565
    CBO (Calcite Return Path) Handle field access for nested column
  13. Sub-task HIVE-14562
    CBO (Calcite Return Path) Wrong results for limit + offset
  14. Sub-task HIVE-14522
    CBO: Calcite Operator To Hive Operator(Calcite Return Path): Fix test failure for auto_join_filters
  15. Sub-task HIVE-14442
    CBO: Calcite Operator To Hive Operator(Calcite Return Path): Wrong result/plan in group by with hive.map.aggr=false
  16. Sub-task HIVE-14396
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): TestCliDriver count.q failure
  17. Sub-task HIVE-13005
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): RexNode convert(ExprNodeConstantDesc literal) decimal support bug
  18. Sub-task HIVE-12924
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): TestCliDriver groupby_ppr_multi_distinct.q failure
  19. Sub-task HIVE-12923
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): TestCliDriver groupby_grouping_sets4.q failure
  20. Sub-task HIVE-12806
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): MiniTezCliDriver vector_auto_smb_mapjoin_14.q failure
  21. Sub-task HIVE-12805
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): MiniTezCliDriver skewjoin.q failure
  22. Sub-task HIVE-12803
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): MiniTezCliDriver count.q failure
  23. Sub-task HIVE-12802
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): MiniTezCliDriver.vector_join_filters.q failure
  24. Sub-task HIVE-12798
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): MiniTezCliDriver.vector* queries failures due to NPE in Vectorizer.onExpressionHasNullSafes()
  25. Sub-task HIVE-12518
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): fix test failure for groupby_resolution.q
  26. Sub-task HIVE-12335
    CBO (Calcite Return Path): Support for unique join
  27. Sub-task HIVE-12305
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): UDAF can not pull up constant expressions
  28. Sub-task HIVE-12301
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): fix test failure for udf_percentile.q
  29. Sub-task HIVE-12297
    CBO: Calcite Operator To Hive Operator (Calcite Return Path) : dealing with '$' in typeInfo
  30. Sub-task HIVE-12272
    CBO: Calcite Operator To Hive Operator (Calcite Return Path) : columnPruner prunes everything when union is the last operator before FS
  31. Sub-task HIVE-12203
    CBO (Calcite Return Path): groupby_grouping_id2.q returns wrong results
  32. Sub-task HIVE-11907
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): fix TestJdbcDriver2
  33. Sub-task HIVE-11896
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): deal with hive default partition when inserting data
  34. Sub-task HIVE-11895
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): fix udaf_percentile_approx_23.q
  35. Sub-task HIVE-11894
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): correct table column name in CTAS queries
  36. Sub-task HIVE-11646
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): fix multiple window spec for PTF operator
  37. Sub-task HIVE-11629
    CBO: Calcite Operator To Hive Operator (Calcite Return Path) : fix the filter expressions for full outer join and right outer join
  38. Sub-task HIVE-11623
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): fix the tableAlias for ReduceSink operator
  39. Sub-task HIVE-11614
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): ctas after order by has problem
  40. Sub-task HIVE-11597
    [CBO new return path] Handling of strings of zero-length
  41. Sub-task HIVE-11557
    CBO (Calcite Return Path): Convert to flat AND/OR
  42. Sub-task HIVE-11480
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): char/varchar as input to GenericUDAF
  43. Sub-task HIVE-11465
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): fix stringToMap
  44. Sub-task HIVE-11445
    CBO: Calcite Operator To Hive Operator (Calcite Return Path) : groupby distinct does not work
  45. Sub-task HIVE-11437
    CBO: Calcite Operator To Hive Operator (Calcite Return Path) : dealing with insert into
  46. Sub-task HIVE-11436
    CBO: Calcite Operator To Hive Operator (Calcite Return Path) : dealing with empty char
  47. Sub-task HIVE-11416
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): Groupby Optimizer assumes the schema can match after removing RS and GBY
  48. Sub-task HIVE-11409
    CBO: Calcite Operator To Hive Operator (Calcite Return Path): add SEL before UNION
  49. Sub-task HIVE-11391
    CBO (Calcite Return Path): Add CBO tests with return path on
  50. Sub-task HIVE-11390
    CBO (Calcite Return Path): Fix table alias propagation for windowing
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