add comment for stb

include/common/tmsg.h

@@ -262,6 +262,7 @@ typedef struct {
   int32_t numOfTags;
   SArray* pColumns;
   SArray* pTags;
+  char    comment[TSDB_STB_COMMENT_LEN];
 } SMCreateStbReq;
 
 int32_t tSerializeSMCreateStbReq(void** buf, SMCreateStbReq* pReq);

include/util/tdef.h

@@ -186,8 +186,8 @@ do { \
 #define TSDB_MAX_SQL_SHOW_LEN     1024
 #define TSDB_MAX_ALLOWED_SQL_LEN  (1*1024*1024u)          // sql length should be less than 1mb
 
-#define TSDB_APP_NAME_LEN          TSDB_UNI_LEN
-
+#define TSDB_APP_NAME_LEN         TSDB_UNI_LEN
+#define TSDB_STB_COMMENT_LEN      1024
   /**
    *  In some scenarios uint16_t (0~65535) is used to store the row len.
    *  - Firstly, we use 65531(65535 - 4), as the SDataRow/SKVRow contains 4 bits header.

source/common/src/tmsg.c

@@ -359,6 +359,7 @@ int32_t tSerializeSMCreateStbReq(void **buf, SMCreateStbReq *pReq) {
     tlen += taosEncodeString(buf, pField->name);
   }
 
+  tlen += taosEncodeString(buf, pReq->comment);
   return tlen;
 }
 
@@ -397,6 +398,7 @@ void *tDeserializeSMCreateStbReq(void *buf, SMCreateStbReq *pReq) {
     }
   }
 
+  buf = taosDecodeStringTo(buf, pReq->comment);
   return buf;
 }
 

source/dnode/mnode/impl/inc/mndDef.h

@@ -307,6 +307,7 @@ typedef struct {
   SSchema* pColumns;
   SSchema* pTags;
   SRWLatch lock;
+  char     comment[TSDB_STB_COMMENT_LEN];
 } SStbObj;
 
 typedef struct {

source/dnode/mnode/impl/src/mndStb.c

@@ -104,6 +104,7 @@ static SSdbRaw *mndStbActionEncode(SStbObj *pStb) {
     SDB_SET_BINARY(pRaw, dataPos, pSchema->name, TSDB_COL_NAME_LEN, STB_ENCODE_OVER)
   }
 
+  SDB_SET_BINARY(pRaw, dataPos, pStb->comment, TSDB_STB_COMMENT_LEN, STB_ENCODE_OVER)
   SDB_SET_RESERVE(pRaw, dataPos, TSDB_STB_RESERVE_SIZE, STB_ENCODE_OVER)
   SDB_SET_DATALEN(pRaw, dataPos, STB_ENCODE_OVER)
 
@@ -171,6 +172,7 @@ static SSdbRow *mndStbActionDecode(SSdbRaw *pRaw) {
     SDB_GET_BINARY(pRaw, dataPos, pSchema->name, TSDB_COL_NAME_LEN, STB_DECODE_OVER)
   }
 
+  SDB_GET_BINARY(pRaw, dataPos, pStb->comment, TSDB_STB_COMMENT_LEN, STB_DECODE_OVER)
   SDB_GET_RESERVE(pRaw, dataPos, TSDB_STB_RESERVE_SIZE, STB_DECODE_OVER)
 
   terrno = 0;
@@ -234,6 +236,7 @@ static int32_t mndStbActionUpdate(SSdb *pSdb, SStbObj *pOld, SStbObj *pNew) {
   pOld->numOfTags = pNew->numOfTags;
   memcpy(pOld->pColumns, pNew->pColumns, pOld->numOfColumns * sizeof(SSchema));
   memcpy(pOld->pTags, pNew->pTags, pOld->numOfTags * sizeof(SSchema));
+  memcpy(pOld->comment, pNew->comment, TSDB_STB_COMMENT_LEN);
   taosWUnLockLatch(&pOld->lock);
   return 0;
 }