diff --git a/src/query/inc/qFilter.h b/src/query/inc/qFilter.h
index c34a56cc1cd6e135947eee897f87d060880f15c7..dcfbe7f0952bffe49caa2b7869d994935c47ac3f 100644
--- a/src/query/inc/qFilter.h
+++ b/src/query/inc/qFilter.h
@@ -180,6 +180,7 @@ typedef struct SFilterGroup {
 typedef struct SFilterColInfo {
   uint8_t type;
   int32_t dataType;
+  uint8_t optr;   // for equal operation in the relation of RELATION_IN
   void   *info;
 } SFilterColInfo;