diff --git a/src/bin/gs_guc/cluster_guc.conf b/src/bin/gs_guc/cluster_guc.conf
index e480e990f1258601997ad72034330f3694c3570c..ea5f91cb24b742a79feb3e84c33bca28ad3ff5f9 100755
--- a/src/bin/gs_guc/cluster_guc.conf
+++ b/src/bin/gs_guc/cluster_guc.conf
@@ -594,6 +594,7 @@ enable_ustore|bool|0,0|NULL|Enable to create ustore table|
 enable_default_ustore_table|bool|0,0|NULL|Enable to create ustore table by default|
 enable_gtt_concurrent_truncate|bool|0,0|NULL|Enable concurrent truncate table for GTT|
 foreign_key_checks|bool|0,0|NULL|Enable foreign key check on insert, update or drop operation,only applicable to b-format db.|
+unique_checks|bool|0,0|NULL|Enable unique check,only applicable to b-format db.|
 reserve_space_for_nullable_atts|bool|0,0|NULL|Enable reserve space for nullable attributes, only applicable to ustore|
 undo_space_limit_size|int|819200,17179869184|kB|Maximum physical space of the undo command|
 undo_limit_size_per_transaction|int|2048,17179869184|kB|Maximum space for allocating undo resources in a transaction|
diff --git a/src/common/backend/utils/misc/guc.cpp b/src/common/backend/utils/misc/guc.cpp
index f0653d8367cce30c32c6e8a6e9bff2abfdd5c1af..dcdec4b4dffbcbbaff51618cc6195f83fa6d9a3d 100755
--- a/src/common/backend/utils/misc/guc.cpp
+++ b/src/common/backend/utils/misc/guc.cpp
@@ -2192,6 +2192,20 @@ static void InitConfigureNamesBool()
             NULL,
             NULL
         },
+        {{"unique_checks",
+            PGC_USERSET,
+            NODE_ALL,
+            QUERY_TUNING,
+            gettext_noop("Enable unique check,"
+            "only applicable to b-format db."
+            ),
+            NULL},
+            &u_sess->attr.attr_common.unique_checks,
+            true,
+            NULL,
+            NULL,
+            NULL
+        },
         {{"enable_dump_trigger_definer",
             PGC_USERSET,
             NODE_ALL,
diff --git a/src/include/knl/knl_guc/knl_session_attr_common.h b/src/include/knl/knl_guc/knl_session_attr_common.h
index a12c5c4ea3908f60071f78612e1e350e20999006..de5d03e53be73379e0550be7731aec986a7aca56 100644
--- a/src/include/knl/knl_guc/knl_session_attr_common.h
+++ b/src/include/knl/knl_guc/knl_session_attr_common.h
@@ -253,6 +253,7 @@ typedef struct knl_session_attr_common {
     int time_record_level;
     bool enable_record_nettime;
     bool foreign_key_checks;
+    bool unique_checks;
     bool enable_dump_trigger_definer;
 #ifdef ENABLE_HTAP
     bool enable_parallel_populate;