diff --git a/src/query/src/dist_plan/commutativity.rs b/src/query/src/dist_plan/commutativity.rs
index 4f96966b46..194e2d3b9d 100644
--- a/src/query/src/dist_plan/commutativity.rs
+++ b/src/query/src/dist_plan/commutativity.rs
@@ -158,8 +158,9 @@ impl Categorizer {
             | Expr::ScalarSubquery(_)
             | Expr::Wildcard { .. } => Commutativity::Unimplemented,
 
-            Expr::Alias(_)
-            | Expr::Unnest(_)
+            Expr::Alias(alias) => Self::check_expr(&alias.expr),
+
+            Expr::Unnest(_)
             | Expr::GroupingSet(_)
             | Expr::Placeholder(_)
             | Expr::OuterReferenceColumn(_, _) => Commutativity::Unimplemented,
diff --git a/src/query/src/optimizer/windowed_sort.rs b/src/query/src/optimizer/windowed_sort.rs
index 2ce78d38b9..8751211c2d 100644
--- a/src/query/src/optimizer/windowed_sort.rs
+++ b/src/query/src/optimizer/windowed_sort.rs
@@ -12,12 +12,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+use std::collections::HashSet;
 use std::sync::Arc;
 
 use datafusion::physical_optimizer::PhysicalOptimizerRule;
 use datafusion::physical_plan::coalesce_batches::CoalesceBatchesExec;
 use datafusion::physical_plan::coalesce_partitions::CoalescePartitionsExec;
 use datafusion::physical_plan::filter::FilterExec;
+use datafusion::physical_plan::projection::ProjectionExec;
 use datafusion::physical_plan::repartition::RepartitionExec;
 use datafusion::physical_plan::sorts::sort::SortExec;
 use datafusion::physical_plan::sorts::sort_preserving_merge::SortPreservingMergeExec;
@@ -88,7 +90,7 @@ impl WindowedSortPhysicalRule {
                             .expr
                             .as_any()
                             .downcast_ref::<PhysicalColumn>()
-                        && column_expr.name() == scanner_info.time_index
+                        && scanner_info.time_index.contains(column_expr.name())
                     {
                     } else {
                         return Ok(Transformed::no(plan));
@@ -148,13 +150,13 @@ impl WindowedSortPhysicalRule {
 #[derive(Debug)]
 struct ScannerInfo {
     partition_ranges: Vec<Vec<PartitionRange>>,
-    time_index: String,
+    time_index: HashSet<String>,
     tag_columns: Vec<String>,
 }
 
 fn fetch_partition_range(input: Arc<dyn ExecutionPlan>) -> DataFusionResult<Option<ScannerInfo>> {
     let mut partition_ranges = None;
-    let mut time_index = None;
+    let mut time_index = HashSet::new();
     let mut tag_columns = None;
     let mut is_batch_coalesced = false;
 
@@ -172,9 +174,21 @@ fn fetch_partition_range(input: Arc<dyn ExecutionPlan>) -> DataFusionResult<Opti
             is_batch_coalesced = true;
         }
 
+        // Collects alias of the time index column.
+        if let Some(projection) = plan.as_any().downcast_ref::<ProjectionExec>() {
+            for (expr, output_name) in projection.expr() {
+                if let Some(column_expr) = expr.as_any().downcast_ref::<PhysicalColumn>() {
+                    if time_index.contains(column_expr.name()) {
+                        time_index.insert(output_name.clone());
+                    }
+                }
+            }
+        }
+
         if let Some(region_scan_exec) = plan.as_any().downcast_ref::<RegionScanExec>() {
             partition_ranges = Some(region_scan_exec.get_uncollapsed_partition_ranges());
-            time_index = Some(region_scan_exec.time_index());
+            // Reset time index column.
+            time_index = HashSet::from([region_scan_exec.time_index()]);
             tag_columns = Some(region_scan_exec.tag_columns());
 
             // set distinguish_partition_ranges to true, this is an incorrect workaround
@@ -189,7 +203,7 @@ fn fetch_partition_range(input: Arc<dyn ExecutionPlan>) -> DataFusionResult<Opti
     let result = try {
         ScannerInfo {
             partition_ranges: partition_ranges?,
-            time_index: time_index?,
+            time_index,
             tag_columns: tag_columns?,
         }
     };
diff --git a/tests/cases/distributed/explain/order_by.result b/tests/cases/distributed/explain/order_by.result
index 6553ea1b68..a558ee9336 100644
--- a/tests/cases/distributed/explain/order_by.result
+++ b/tests/cases/distributed/explain/order_by.result
@@ -75,3 +75,84 @@ DROP TABLE test;
 
 Affected Rows: 0
 
+CREATE TABLE test_pk(pk INTEGER PRIMARY KEY, i INTEGER, t TIMESTAMP TIME INDEX) WITH('compaction.type'='twcs', 'compaction.twcs.max_inactive_window_files'='4');
+
+Affected Rows: 0
+
+INSERT INTO test_pk VALUES (1, 1, 1), (2, NULL, 2), (3, 1, 3), (4, 2, 4), (5, 2, 5), (6, NULL, 6);
+
+Affected Rows: 6
+
+-- Test aliasing.
+SELECT i, t AS alias_ts FROM test_pk ORDER BY t DESC LIMIT 5;
+
++---+-------------------------+
+| i | alias_ts                |
++---+-------------------------+
+|   | 1970-01-01T00:00:00.006 |
+| 2 | 1970-01-01T00:00:00.005 |
+| 2 | 1970-01-01T00:00:00.004 |
+| 1 | 1970-01-01T00:00:00.003 |
+|   | 1970-01-01T00:00:00.002 |
++---+-------------------------+
+
+-- Test aliasing.
+SELECT i, t AS alias_ts FROM test_pk ORDER BY alias_ts DESC LIMIT 5;
+
++---+-------------------------+
+| i | alias_ts                |
++---+-------------------------+
+|   | 1970-01-01T00:00:00.006 |
+| 2 | 1970-01-01T00:00:00.005 |
+| 2 | 1970-01-01T00:00:00.004 |
+| 1 | 1970-01-01T00:00:00.003 |
+|   | 1970-01-01T00:00:00.002 |
++---+-------------------------+
+
+-- SQLNESS REPLACE (-+) -
+-- SQLNESS REPLACE (\s\s+) _
+-- SQLNESS REPLACE (peers.*) REDACTED
+-- SQLNESS REPLACE (metrics.*) REDACTED
+-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
+EXPLAIN ANALYZE SELECT i, t AS alias_ts FROM test_pk ORDER BY t DESC LIMIT 5;
+
++-+-+-+
+| stage | node | plan_|
++-+-+-+
+| 0_| 0_|_MergeScanExec: REDACTED
+|_|_|_|
+| 1_| 0_|_ProjectionExec: expr=[i@0 as i, t@1 as alias_ts] REDACTED
+|_|_|_SortPreservingMergeExec: [test_pk.t__temp__0@2 DESC] REDACTED
+|_|_|_WindowedSortExec: expr=test_pk.t__temp__0@2 DESC num_ranges=1 fetch=5 REDACTED
+|_|_|_PartSortExec: expr=test_pk.t__temp__0@2 DESC num_ranges=1 limit=5 REDACTED
+|_|_|_ProjectionExec: expr=[i@0 as i, t@1 as t, t@1 as test_pk.t__temp__0] REDACTED
+|_|_|_SeqScan: region=REDACTED, partition_count=1 (1 memtable ranges, 0 file 0 ranges) REDACTED
+|_|_|_|
+|_|_| Total rows: 5_|
++-+-+-+
+
+-- SQLNESS REPLACE (-+) -
+-- SQLNESS REPLACE (\s\s+) _
+-- SQLNESS REPLACE (peers.*) REDACTED
+-- SQLNESS REPLACE (metrics.*) REDACTED
+-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
+EXPLAIN ANALYZE SELECT i, t AS alias_ts FROM test_pk ORDER BY alias_ts DESC LIMIT 5;
+
++-+-+-+
+| stage | node | plan_|
++-+-+-+
+| 0_| 0_|_MergeScanExec: REDACTED
+|_|_|_|
+| 1_| 0_|_ProjectionExec: expr=[i@0 as i, t@1 as alias_ts] REDACTED
+|_|_|_SortPreservingMergeExec: [t@1 DESC] REDACTED
+|_|_|_WindowedSortExec: expr=t@1 DESC num_ranges=1 fetch=5 REDACTED
+|_|_|_PartSortExec: expr=t@1 DESC num_ranges=1 limit=5 REDACTED
+|_|_|_SeqScan: region=REDACTED, partition_count=1 (1 memtable ranges, 0 file 0 ranges) REDACTED
+|_|_|_|
+|_|_| Total rows: 5_|
++-+-+-+
+
+DROP TABLE test_pk;
+
+Affected Rows: 0
+
diff --git a/tests/cases/distributed/explain/order_by.sql b/tests/cases/distributed/explain/order_by.sql
index 39ad15bbb1..4c2f505697 100644
--- a/tests/cases/distributed/explain/order_by.sql
+++ b/tests/cases/distributed/explain/order_by.sql
@@ -27,3 +27,29 @@ EXPLAIN SELECT a, b FROM test ORDER BY a, b;
 EXPLAIN SELECT DISTINCT a, b FROM test ORDER BY a, b;
 
 DROP TABLE test;
+
+CREATE TABLE test_pk(pk INTEGER PRIMARY KEY, i INTEGER, t TIMESTAMP TIME INDEX) WITH('compaction.type'='twcs', 'compaction.twcs.max_inactive_window_files'='4');
+
+INSERT INTO test_pk VALUES (1, 1, 1), (2, NULL, 2), (3, 1, 3), (4, 2, 4), (5, 2, 5), (6, NULL, 6);
+
+-- Test aliasing.
+SELECT i, t AS alias_ts FROM test_pk ORDER BY t DESC LIMIT 5;
+
+-- Test aliasing.
+SELECT i, t AS alias_ts FROM test_pk ORDER BY alias_ts DESC LIMIT 5;
+
+-- SQLNESS REPLACE (-+) -
+-- SQLNESS REPLACE (\s\s+) _
+-- SQLNESS REPLACE (peers.*) REDACTED
+-- SQLNESS REPLACE (metrics.*) REDACTED
+-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
+EXPLAIN ANALYZE SELECT i, t AS alias_ts FROM test_pk ORDER BY t DESC LIMIT 5;
+
+-- SQLNESS REPLACE (-+) -
+-- SQLNESS REPLACE (\s\s+) _
+-- SQLNESS REPLACE (peers.*) REDACTED
+-- SQLNESS REPLACE (metrics.*) REDACTED
+-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
+EXPLAIN ANALYZE SELECT i, t AS alias_ts FROM test_pk ORDER BY alias_ts DESC LIMIT 5;
+
+DROP TABLE test_pk;
diff --git a/tests/cases/standalone/common/order/order_by_exceptions.result b/tests/cases/standalone/common/order/order_by_exceptions.result
index 0a3c47a272..6c2b95f98a 100644
--- a/tests/cases/standalone/common/order/order_by_exceptions.result
+++ b/tests/cases/standalone/common/order/order_by_exceptions.result
@@ -70,20 +70,16 @@ EXPLAIN SELECT a % 2, b FROM test UNION SELECT a % 2 AS k, b FROM test ORDER BY
 | logical_plan  | Sort: Int64(-1) ASC NULLS LAST                                                                            |
 |               |   Aggregate: groupBy=[[test.a % Int64(2), test.b]], aggr=[[]]                                             |
 |               |     Union                                                                                                 |
-|               |       Projection: CAST(test.a AS Int64) % Int64(2) AS test.a % Int64(2), test.b                           |
-|               |         MergeScan [is_placeholder=false]                                                                  |
-|               |       Projection: CAST(test.a AS Int64) % Int64(2) AS test.a % Int64(2), test.b                           |
-|               |         MergeScan [is_placeholder=false]                                                                  |
+|               |       MergeScan [is_placeholder=false]                                                                    |
+|               |       MergeScan [is_placeholder=false]                                                                    |
 | physical_plan | CoalescePartitionsExec                                                                                    |
 |               |   AggregateExec: mode=FinalPartitioned, gby=[test.a % Int64(2)@0 as test.a % Int64(2), b@1 as b], aggr=[] |
 |               |     CoalesceBatchesExec: target_batch_size=8192                                                           |
 |               |       RepartitionExec: REDACTED
 |               |         AggregateExec: mode=Partial, gby=[test.a % Int64(2)@0 as test.a % Int64(2), b@1 as b], aggr=[]    |
 |               |           UnionExec                                                                                       |
-|               |             ProjectionExec: expr=[CAST(a@0 AS Int64) % 2 as test.a % Int64(2), b@1 as b]                  |
-|               |               MergeScanExec: REDACTED
-|               |             ProjectionExec: expr=[CAST(a@0 AS Int64) % 2 as test.a % Int64(2), b@1 as b]                  |
-|               |               MergeScanExec: REDACTED
+|               |             MergeScanExec: REDACTED
+|               |             MergeScanExec: REDACTED
 |               |                                                                                                           |
 +---------------+-----------------------------------------------------------------------------------------------------------+
 
diff --git a/tests/cases/standalone/optimizer/order_by.result b/tests/cases/standalone/optimizer/order_by.result
index 038e47bbfd..51f19153e1 100644
--- a/tests/cases/standalone/optimizer/order_by.result
+++ b/tests/cases/standalone/optimizer/order_by.result
@@ -52,3 +52,84 @@ explain select * from numbers order by number asc limit 10;
 |               |                                                                                                                                                                                                                                        |
 +---------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
 
+CREATE TABLE test_pk(pk INTEGER PRIMARY KEY, i INTEGER, t TIMESTAMP TIME INDEX) WITH('compaction.type'='twcs', 'compaction.twcs.max_inactive_window_files'='4');
+
+Affected Rows: 0
+
+INSERT INTO test_pk VALUES (1, 1, 1), (2, NULL, 2), (3, 1, 3), (4, 2, 4), (5, 2, 5), (6, NULL, 6);
+
+Affected Rows: 6
+
+-- Test aliasing.
+SELECT i, t AS alias_ts FROM test_pk ORDER BY t DESC LIMIT 5;
+
++---+-------------------------+
+| i | alias_ts                |
++---+-------------------------+
+|   | 1970-01-01T00:00:00.006 |
+| 2 | 1970-01-01T00:00:00.005 |
+| 2 | 1970-01-01T00:00:00.004 |
+| 1 | 1970-01-01T00:00:00.003 |
+|   | 1970-01-01T00:00:00.002 |
++---+-------------------------+
+
+-- Test aliasing.
+SELECT i, t AS alias_ts FROM test_pk ORDER BY alias_ts DESC LIMIT 5;
+
++---+-------------------------+
+| i | alias_ts                |
++---+-------------------------+
+|   | 1970-01-01T00:00:00.006 |
+| 2 | 1970-01-01T00:00:00.005 |
+| 2 | 1970-01-01T00:00:00.004 |
+| 1 | 1970-01-01T00:00:00.003 |
+|   | 1970-01-01T00:00:00.002 |
++---+-------------------------+
+
+-- SQLNESS REPLACE (-+) -
+-- SQLNESS REPLACE (\s\s+) _
+-- SQLNESS REPLACE (peers.*) REDACTED
+-- SQLNESS REPLACE (metrics.*) REDACTED
+-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
+EXPLAIN ANALYZE SELECT i, t AS alias_ts FROM test_pk ORDER BY t DESC LIMIT 5;
+
++-+-+-+
+| stage | node | plan_|
++-+-+-+
+| 0_| 0_|_MergeScanExec: REDACTED
+|_|_|_|
+| 1_| 0_|_ProjectionExec: expr=[i@0 as i, alias_ts@1 as alias_ts] REDACTED
+|_|_|_SortPreservingMergeExec: [t@2 DESC] REDACTED
+|_|_|_WindowedSortExec: expr=t@2 DESC num_ranges=1 fetch=5 REDACTED
+|_|_|_PartSortExec: expr=t@2 DESC num_ranges=1 limit=5 REDACTED
+|_|_|_ProjectionExec: expr=[i@0 as i, t@1 as alias_ts, t@1 as t] REDACTED
+|_|_|_SeqScan: region=REDACTED, partition_count=1 (1 memtable ranges, 0 file 0 ranges) REDACTED
+|_|_|_|
+|_|_| Total rows: 5_|
++-+-+-+
+
+-- SQLNESS REPLACE (-+) -
+-- SQLNESS REPLACE (\s\s+) _
+-- SQLNESS REPLACE (peers.*) REDACTED
+-- SQLNESS REPLACE (metrics.*) REDACTED
+-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
+EXPLAIN ANALYZE SELECT i, t AS alias_ts FROM test_pk ORDER BY alias_ts DESC LIMIT 5;
+
++-+-+-+
+| stage | node | plan_|
++-+-+-+
+| 0_| 0_|_MergeScanExec: REDACTED
+|_|_|_|
+| 1_| 0_|_SortPreservingMergeExec: [alias_ts@1 DESC] REDACTED
+|_|_|_WindowedSortExec: expr=alias_ts@1 DESC num_ranges=1 fetch=5 REDACTED
+|_|_|_PartSortExec: expr=alias_ts@1 DESC num_ranges=1 limit=5 REDACTED
+|_|_|_ProjectionExec: expr=[i@0 as i, t@1 as alias_ts] REDACTED
+|_|_|_SeqScan: region=REDACTED, partition_count=1 (1 memtable ranges, 0 file 0 ranges) REDACTED
+|_|_|_|
+|_|_| Total rows: 5_|
++-+-+-+
+
+DROP TABLE test_pk;
+
+Affected Rows: 0
+
diff --git a/tests/cases/standalone/optimizer/order_by.sql b/tests/cases/standalone/optimizer/order_by.sql
index eb8bf6e5f0..18802eeda8 100644
--- a/tests/cases/standalone/optimizer/order_by.sql
+++ b/tests/cases/standalone/optimizer/order_by.sql
@@ -7,3 +7,29 @@ explain select * from numbers order by number asc;
 explain select * from numbers order by number desc limit 10;
 
 explain select * from numbers order by number asc limit 10;
+
+CREATE TABLE test_pk(pk INTEGER PRIMARY KEY, i INTEGER, t TIMESTAMP TIME INDEX) WITH('compaction.type'='twcs', 'compaction.twcs.max_inactive_window_files'='4');
+
+INSERT INTO test_pk VALUES (1, 1, 1), (2, NULL, 2), (3, 1, 3), (4, 2, 4), (5, 2, 5), (6, NULL, 6);
+
+-- Test aliasing.
+SELECT i, t AS alias_ts FROM test_pk ORDER BY t DESC LIMIT 5;
+
+-- Test aliasing.
+SELECT i, t AS alias_ts FROM test_pk ORDER BY alias_ts DESC LIMIT 5;
+
+-- SQLNESS REPLACE (-+) -
+-- SQLNESS REPLACE (\s\s+) _
+-- SQLNESS REPLACE (peers.*) REDACTED
+-- SQLNESS REPLACE (metrics.*) REDACTED
+-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
+EXPLAIN ANALYZE SELECT i, t AS alias_ts FROM test_pk ORDER BY t DESC LIMIT 5;
+
+-- SQLNESS REPLACE (-+) -
+-- SQLNESS REPLACE (\s\s+) _
+-- SQLNESS REPLACE (peers.*) REDACTED
+-- SQLNESS REPLACE (metrics.*) REDACTED
+-- SQLNESS REPLACE region=\d+\(\d+,\s+\d+\) region=REDACTED
+EXPLAIN ANALYZE SELECT i, t AS alias_ts FROM test_pk ORDER BY alias_ts DESC LIMIT 5;
+
+DROP TABLE test_pk;