diff --git a/source/common/src/tcol.c b/source/common/src/tcol.c
index 4b45c98d24..34a6ee92bc 100644
--- a/source/common/src/tcol.c
+++ b/source/common/src/tcol.c
@@ -44,11 +44,11 @@ uint8_t getDefaultEncode(uint8_t type) {
     case TSDB_DATA_TYPE_DOUBLE:
       return TSDB_COLVAL_ENCODE_DELTAD;
     case TSDB_DATA_TYPE_VARCHAR:  // TSDB_DATA_TYPE_BINARY
-      return TSDB_COLVAL_ENCODE_SIMPLE8B;
+      return TSDB_COLVAL_ENCODE_DISABLED;
     case TSDB_DATA_TYPE_TIMESTAMP:
       return TSDB_COLVAL_ENCODE_XOR;
     case TSDB_DATA_TYPE_NCHAR:
-      return TSDB_COLVAL_ENCODE_SIMPLE8B;
+      return TSDB_COLVAL_ENCODE_DISABLED;
     case TSDB_DATA_TYPE_UTINYINT:
       return TSDB_COLVAL_ENCODE_SIMPLE8B;
     case TSDB_DATA_TYPE_USMALLINT:
@@ -58,9 +58,9 @@ uint8_t getDefaultEncode(uint8_t type) {
     case TSDB_DATA_TYPE_UBIGINT:
       return TSDB_COLVAL_ENCODE_SIMPLE8B;
     case TSDB_DATA_TYPE_JSON:
-      return TSDB_COLVAL_ENCODE_SIMPLE8B;
+      return TSDB_COLVAL_ENCODE_DISABLED;
     case TSDB_DATA_TYPE_VARBINARY:
-      return TSDB_COLVAL_ENCODE_SIMPLE8B;
+      return TSDB_COLVAL_ENCODE_DISABLED;
     case TSDB_DATA_TYPE_DECIMAL:
       return TSDB_COLVAL_ENCODE_DELTAD;
     case TSDB_DATA_TYPE_BLOB: