diff --git a/src/compat/compat.h b/src/compat/compat.h
index 2760a15bb74..5aa9a9e689c 100644
--- a/src/compat/compat.h
+++ b/src/compat/compat.h
@@ -972,6 +972,7 @@ object_ownercheck(Oid classid, Oid objectid, Oid roleid)
 
 #if PG14_LT
 #define F_SUM_INT4 2108
+#define F_COUNT_ 2803
 #endif
 
 /*
diff --git a/tsl/test/expected/transparent_decompression-13.out b/tsl/test/expected/transparent_decompression-13.out
index 77501fd6c3b..82b05d887f8 100644
--- a/tsl/test/expected/transparent_decompression-13.out
+++ b/tsl/test/expected/transparent_decompression-13.out
@@ -2015,9 +2015,9 @@ WHERE device_id = 1;
  Finalize Aggregate (actual rows=1 loops=1)
    Output: count(*)
    ->  Append (actual rows=3 loops=1)
-         ->  Partial Aggregate (actual rows=1 loops=1)
-               Output: PARTIAL count(*)
-               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_1_chunk (actual rows=360 loops=1)
+         ->  Custom Scan (VectorAgg) (actual rows=1 loops=1)
+               Output: (PARTIAL count(*))
+               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_1_chunk (never executed)
                      Bulk Decompression: false
                      ->  Index Scan using compress_hyper_5_15_chunk_device_id_device_id_peer__ts_meta_idx on _timescaledb_internal.compress_hyper_5_15_chunk (actual rows=1 loops=1)
                            Output: compress_hyper_5_15_chunk._ts_meta_count, compress_hyper_5_15_chunk._ts_meta_sequence_num, compress_hyper_5_15_chunk.device_id, compress_hyper_5_15_chunk.device_id_peer, compress_hyper_5_15_chunk._ts_meta_min_3, compress_hyper_5_15_chunk._ts_meta_max_3, compress_hyper_5_15_chunk."time", compress_hyper_5_15_chunk._ts_meta_min_1, compress_hyper_5_15_chunk._ts_meta_max_1, compress_hyper_5_15_chunk.v0, compress_hyper_5_15_chunk._ts_meta_min_2, compress_hyper_5_15_chunk._ts_meta_max_2, compress_hyper_5_15_chunk.v1, compress_hyper_5_15_chunk.v2, compress_hyper_5_15_chunk.v3
@@ -2027,9 +2027,9 @@ WHERE device_id = 1;
                ->  Seq Scan on _timescaledb_internal._hyper_1_2_chunk (actual rows=504 loops=1)
                      Filter: (_hyper_1_2_chunk.device_id = 1)
                      Rows Removed by Filter: 2016
-         ->  Partial Aggregate (actual rows=1 loops=1)
-               Output: PARTIAL count(*)
-               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_3_chunk (actual rows=504 loops=1)
+         ->  Custom Scan (VectorAgg) (actual rows=1 loops=1)
+               Output: (PARTIAL count(*))
+               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_3_chunk (never executed)
                      Bulk Decompression: false
                      ->  Index Scan using compress_hyper_5_16_chunk_device_id_device_id_peer__ts_meta_idx on _timescaledb_internal.compress_hyper_5_16_chunk (actual rows=1 loops=1)
                            Output: compress_hyper_5_16_chunk._ts_meta_count, compress_hyper_5_16_chunk._ts_meta_sequence_num, compress_hyper_5_16_chunk.device_id, compress_hyper_5_16_chunk.device_id_peer, compress_hyper_5_16_chunk._ts_meta_min_3, compress_hyper_5_16_chunk._ts_meta_max_3, compress_hyper_5_16_chunk."time", compress_hyper_5_16_chunk._ts_meta_min_1, compress_hyper_5_16_chunk._ts_meta_max_1, compress_hyper_5_16_chunk.v0, compress_hyper_5_16_chunk._ts_meta_min_2, compress_hyper_5_16_chunk._ts_meta_max_2, compress_hyper_5_16_chunk.v1, compress_hyper_5_16_chunk.v2, compress_hyper_5_16_chunk.v3
diff --git a/tsl/test/expected/transparent_decompression-14.out b/tsl/test/expected/transparent_decompression-14.out
index 077c64210cb..b7a5e886e3d 100644
--- a/tsl/test/expected/transparent_decompression-14.out
+++ b/tsl/test/expected/transparent_decompression-14.out
@@ -2015,9 +2015,9 @@ WHERE device_id = 1;
  Finalize Aggregate (actual rows=1 loops=1)
    Output: count(*)
    ->  Append (actual rows=3 loops=1)
-         ->  Partial Aggregate (actual rows=1 loops=1)
-               Output: PARTIAL count(*)
-               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_1_chunk (actual rows=360 loops=1)
+         ->  Custom Scan (VectorAgg) (actual rows=1 loops=1)
+               Output: (PARTIAL count(*))
+               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_1_chunk (never executed)
                      Bulk Decompression: false
                      ->  Index Scan using compress_hyper_5_15_chunk_device_id_device_id_peer__ts_meta_idx on _timescaledb_internal.compress_hyper_5_15_chunk (actual rows=1 loops=1)
                            Output: compress_hyper_5_15_chunk._ts_meta_count, compress_hyper_5_15_chunk._ts_meta_sequence_num, compress_hyper_5_15_chunk.device_id, compress_hyper_5_15_chunk.device_id_peer, compress_hyper_5_15_chunk._ts_meta_min_3, compress_hyper_5_15_chunk._ts_meta_max_3, compress_hyper_5_15_chunk."time", compress_hyper_5_15_chunk._ts_meta_min_1, compress_hyper_5_15_chunk._ts_meta_max_1, compress_hyper_5_15_chunk.v0, compress_hyper_5_15_chunk._ts_meta_min_2, compress_hyper_5_15_chunk._ts_meta_max_2, compress_hyper_5_15_chunk.v1, compress_hyper_5_15_chunk.v2, compress_hyper_5_15_chunk.v3
@@ -2027,9 +2027,9 @@ WHERE device_id = 1;
                ->  Seq Scan on _timescaledb_internal._hyper_1_2_chunk (actual rows=504 loops=1)
                      Filter: (_hyper_1_2_chunk.device_id = 1)
                      Rows Removed by Filter: 2016
-         ->  Partial Aggregate (actual rows=1 loops=1)
-               Output: PARTIAL count(*)
-               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_3_chunk (actual rows=504 loops=1)
+         ->  Custom Scan (VectorAgg) (actual rows=1 loops=1)
+               Output: (PARTIAL count(*))
+               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_3_chunk (never executed)
                      Bulk Decompression: false
                      ->  Index Scan using compress_hyper_5_16_chunk_device_id_device_id_peer__ts_meta_idx on _timescaledb_internal.compress_hyper_5_16_chunk (actual rows=1 loops=1)
                            Output: compress_hyper_5_16_chunk._ts_meta_count, compress_hyper_5_16_chunk._ts_meta_sequence_num, compress_hyper_5_16_chunk.device_id, compress_hyper_5_16_chunk.device_id_peer, compress_hyper_5_16_chunk._ts_meta_min_3, compress_hyper_5_16_chunk._ts_meta_max_3, compress_hyper_5_16_chunk."time", compress_hyper_5_16_chunk._ts_meta_min_1, compress_hyper_5_16_chunk._ts_meta_max_1, compress_hyper_5_16_chunk.v0, compress_hyper_5_16_chunk._ts_meta_min_2, compress_hyper_5_16_chunk._ts_meta_max_2, compress_hyper_5_16_chunk.v1, compress_hyper_5_16_chunk.v2, compress_hyper_5_16_chunk.v3
diff --git a/tsl/test/expected/transparent_decompression-16.out b/tsl/test/expected/transparent_decompression-16.out
index 0e56618f5a0..354463b6566 100644
--- a/tsl/test/expected/transparent_decompression-16.out
+++ b/tsl/test/expected/transparent_decompression-16.out
@@ -2016,9 +2016,9 @@ WHERE device_id = 1;
  Finalize Aggregate (actual rows=1 loops=1)
    Output: count(*)
    ->  Append (actual rows=3 loops=1)
-         ->  Partial Aggregate (actual rows=1 loops=1)
-               Output: PARTIAL count(*)
-               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_1_chunk (actual rows=360 loops=1)
+         ->  Custom Scan (VectorAgg) (actual rows=1 loops=1)
+               Output: (PARTIAL count(*))
+               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_1_chunk (never executed)
                      Bulk Decompression: false
                      ->  Index Scan using compress_hyper_5_15_chunk_device_id_device_id_peer__ts_meta_idx on _timescaledb_internal.compress_hyper_5_15_chunk (actual rows=1 loops=1)
                            Output: compress_hyper_5_15_chunk._ts_meta_count, compress_hyper_5_15_chunk._ts_meta_sequence_num, compress_hyper_5_15_chunk.device_id, compress_hyper_5_15_chunk.device_id_peer, compress_hyper_5_15_chunk._ts_meta_min_3, compress_hyper_5_15_chunk._ts_meta_max_3, compress_hyper_5_15_chunk."time", compress_hyper_5_15_chunk._ts_meta_min_1, compress_hyper_5_15_chunk._ts_meta_max_1, compress_hyper_5_15_chunk.v0, compress_hyper_5_15_chunk._ts_meta_min_2, compress_hyper_5_15_chunk._ts_meta_max_2, compress_hyper_5_15_chunk.v1, compress_hyper_5_15_chunk.v2, compress_hyper_5_15_chunk.v3
@@ -2028,9 +2028,9 @@ WHERE device_id = 1;
                ->  Seq Scan on _timescaledb_internal._hyper_1_2_chunk (actual rows=504 loops=1)
                      Filter: (_hyper_1_2_chunk.device_id = 1)
                      Rows Removed by Filter: 2016
-         ->  Partial Aggregate (actual rows=1 loops=1)
-               Output: PARTIAL count(*)
-               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_3_chunk (actual rows=504 loops=1)
+         ->  Custom Scan (VectorAgg) (actual rows=1 loops=1)
+               Output: (PARTIAL count(*))
+               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_3_chunk (never executed)
                      Bulk Decompression: false
                      ->  Index Scan using compress_hyper_5_16_chunk_device_id_device_id_peer__ts_meta_idx on _timescaledb_internal.compress_hyper_5_16_chunk (actual rows=1 loops=1)
                            Output: compress_hyper_5_16_chunk._ts_meta_count, compress_hyper_5_16_chunk._ts_meta_sequence_num, compress_hyper_5_16_chunk.device_id, compress_hyper_5_16_chunk.device_id_peer, compress_hyper_5_16_chunk._ts_meta_min_3, compress_hyper_5_16_chunk._ts_meta_max_3, compress_hyper_5_16_chunk."time", compress_hyper_5_16_chunk._ts_meta_min_1, compress_hyper_5_16_chunk._ts_meta_max_1, compress_hyper_5_16_chunk.v0, compress_hyper_5_16_chunk._ts_meta_min_2, compress_hyper_5_16_chunk._ts_meta_max_2, compress_hyper_5_16_chunk.v1, compress_hyper_5_16_chunk.v2, compress_hyper_5_16_chunk.v3