branch-3.0: [fix](nereids) EliminateGroupByConstant should replace agg's group by after removing constant group by keys #49473 (#50043)

Cherry-picked from #49473

Co-authored-by: feiniaofeiafei <[email protected]>

Author: github-actions[bot]

fe/fe-core/src/main/java/org/apache/doris/nereids/rules/analysis/EliminateGroupByConstant.java

@@ -27,8 +27,8 @@
 import org.apache.doris.nereids.trees.plans.Plan;
 import org.apache.doris.nereids.trees.plans.logical.LogicalAggregate;
 import org.apache.doris.nereids.util.ExpressionUtils;
+import org.apache.doris.nereids.util.Utils;
 
-import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Sets;
 
 import java.util.HashMap;
@@ -75,7 +75,8 @@ public Rule build() {
             if (slotGroupByExprs.isEmpty() && lit != null) {
                 slotGroupByExprs.add(lit);
             }
-            return aggregate.withGroupByAndOutput(ImmutableList.copyOf(slotGroupByExprs),
+            return aggregate.withGroupByAndOutput(
+                    ExpressionUtils.replace(Utils.fastToImmutableList(slotGroupByExprs), constantExprsReplaceMap),
                     ExpressionUtils.replaceNamedExpressions(outputExprs, constantExprsReplaceMap));
         }).toRule(RuleType.ELIMINATE_GROUP_BY_CONSTANT);
     }

regression-test/suites/nereids_p0/aggregate/aggregate_groupby_constant.groovy

@@ -18,6 +18,7 @@
 suite("aggregate_groupby_constant") {
     sql "SET enable_nereids_planner=true"
     sql "SET enable_fallback_to_original_planner=false"
+    sql "set disable_nereids_rules='prune_empty_partition'"
 
     sql """ DROP TABLE IF EXISTS table_500_undef_partitions2_keys3_properties4_distributed_by5; """
     sql """
@@ -47,4 +48,29 @@ suite("aggregate_groupby_constant") {
                     OR table1 . `col_int_undef_signed` <> NULL )
             GROUP BY  field1,field2
             ORDER BY  field1,field2 LIMIT 10000;"""
+
+    sql """
+        SELECT
+            IF(
+                t.`col_varchar_10__undef_signed` IN ('女'),
+                (
+                    TIMESTAMPDIFF(
+                        YEAR,
+                        NOW(),
+                        NOW()
+                    )
+                ),
+                1
+            ) AS x0,
+            TIMESTAMPDIFF(
+                YEAR,
+                NOW(),
+                NOW()
+            ) AS x1
+        FROM
+        table_500_undef_partitions2_keys3_properties4_distributed_by5 AS t
+        GROUP BY
+            x0,
+            x1;
+    """
 }