diff --git a/src/query/src/qExtbuffer.c b/src/query/src/qExtbuffer.c
index fc9c60b39b0cfa4b591cc77c1efcdac4e6647ce9..17be294531e51982924d84700fc21653ad231224 100644
--- a/src/query/src/qExtbuffer.c
+++ b/src/query/src/qExtbuffer.c
@@ -344,8 +344,6 @@ static FORCE_INLINE int32_t primaryKeyComparator(int64_t f1, int64_t f2, int32_t
     return 0;
   }
 
-  assert(colIdx == 0);
-
   if (tsOrder == TSDB_ORDER_DESC) {  // primary column desc order
     return (f1 < f2) ? 1 : -1;
   } else {  // asc