diff --git a/source/common/src/tmsg.c b/source/common/src/tmsg.c
index ce038a6df1..52edd79f3b 100644
--- a/source/common/src/tmsg.c
+++ b/source/common/src/tmsg.c
@@ -4169,19 +4169,22 @@ int32_t tEncodeSVAlterTbReq(SEncoder *pEncoder, const SVAlterTbReq *pReq) {
 
   if (tEncodeCStr(pEncoder, pReq->tbName) < 0) return -1;
   if (tEncodeI8(pEncoder, pReq->action) < 0) return -1;
-  if (tEncodeCStr(pEncoder, pReq->colName) < 0) return -1;
   switch (pReq->action) {
     case TSDB_ALTER_TABLE_ADD_COLUMN:
+      if (tEncodeCStr(pEncoder, pReq->colName) < 0) return -1;
       if (tEncodeI8(pEncoder, pReq->type) < 0) return -1;
       if (tEncodeI8(pEncoder, pReq->flags) < 0) return -1;
       if (tEncodeI32v(pEncoder, pReq->bytes) < 0) return -1;
       break;
     case TSDB_ALTER_TABLE_DROP_COLUMN:
+      if (tEncodeCStr(pEncoder, pReq->colName) < 0) return -1;
       break;
     case TSDB_ALTER_TABLE_UPDATE_COLUMN_BYTES:
+      if (tEncodeCStr(pEncoder, pReq->colName) < 0) return -1;
       if (tEncodeI32v(pEncoder, pReq->colModBytes) < 0) return -1;
       break;
     case TSDB_ALTER_TABLE_UPDATE_COLUMN_NAME:
+      if (tEncodeCStr(pEncoder, pReq->colName) < 0) return -1;
       if (tEncodeCStr(pEncoder, pReq->colNewName) < 0) return -1;
       break;
     case TSDB_ALTER_TABLE_UPDATE_TAG_VAL:
@@ -4217,16 +4220,20 @@ int32_t tDecodeSVAlterTbReq(SDecoder *pDecoder, SVAlterTbReq *pReq) {
   if (tDecodeCStr(pDecoder, &pReq->colName) < 0) return -1;
   switch (pReq->action) {
     case TSDB_ALTER_TABLE_ADD_COLUMN:
+      if (tDecodeCStr(pDecoder, &pReq->colName) < 0) return -1;
       if (tDecodeI8(pDecoder, &pReq->type) < 0) return -1;
       if (tDecodeI8(pDecoder, &pReq->flags) < 0) return -1;
       if (tDecodeI32v(pDecoder, &pReq->bytes) < 0) return -1;
       break;
     case TSDB_ALTER_TABLE_DROP_COLUMN:
+      if (tDecodeCStr(pDecoder, &pReq->colName) < 0) return -1;
       break;
     case TSDB_ALTER_TABLE_UPDATE_COLUMN_BYTES:
+      if (tDecodeCStr(pDecoder, &pReq->colName) < 0) return -1;
       if (tDecodeI32v(pDecoder, &pReq->colModBytes) < 0) return -1;
       break;
     case TSDB_ALTER_TABLE_UPDATE_COLUMN_NAME:
+      if (tDecodeCStr(pDecoder, &pReq->colName) < 0) return -1;
       if (tDecodeCStr(pDecoder, &pReq->colNewName) < 0) return -1;
       break;
     case TSDB_ALTER_TABLE_UPDATE_TAG_VAL: