[TD-3284] <fix>: taosdemo support fixed value tag. (#5632)

Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

src/kit/taosdemo/taosdemo.c

@@ -1962,7 +1962,7 @@ static char* getTagValueFromTagSample(SSuperTable* stbInfo, int tagUsePos) {
   return dataBuf;
 }
 
-static char* generateTagVaulesForStb(SSuperTable* stbInfo) {
+static char* generateTagVaulesForStb(SSuperTable* stbInfo, int32_t tableSeq) {
   char*  dataBuf = (char*)calloc(TSDB_MAX_SQL_LEN+1, 1);
   if (NULL == dataBuf) {
     printf("calloc failed! size:%d\n", TSDB_MAX_SQL_LEN+1);
@@ -1981,20 +1981,27 @@ static char* generateTagVaulesForStb(SSuperTable* stbInfo) {
         return NULL;
       }
 
-      char* buf = (char*)calloc(stbInfo->tags[i].dataLen+1, 1);
+      int tagBufLen = stbInfo->tags[i].dataLen + 1;
+      char* buf = (char*)calloc(tagBufLen, 1);
       if (NULL == buf) {
         printf("calloc failed! size:%d\n", stbInfo->tags[i].dataLen);
         tmfree(dataBuf);
         return NULL;
       }
-      rand_string(buf, stbInfo->tags[i].dataLen);
+
+      if (tableSeq % 2) {
+        tstrncpy(buf, "beijing", tagBufLen);
+      } else {
+        tstrncpy(buf, "shanghai", tagBufLen);
+      }
+      //rand_string(buf, stbInfo->tags[i].dataLen);
       dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
               "\'%s\', ", buf);
       tmfree(buf);
     } else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                 "int", strlen("int"))) {
       dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
-              "%d, ", rand_int());
+              "%d, ", tableSeq);
     } else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                 "bigint", strlen("bigint"))) {
       dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
@@ -2585,10 +2592,10 @@ static void* createTable(void *sarg)
           len += snprintf(buffer + len,
                   buff_len - len, "create table ");
         }
-  
+
         char* tagsValBuf = NULL;
         if (0 == superTblInfo->tagSource) {
-          tagsValBuf = generateTagVaulesForStb(superTblInfo);
+          tagsValBuf = generateTagVaulesForStb(superTblInfo, i);
         } else {
           tagsValBuf = getTagValueFromTagSample(
                   superTblInfo,
@@ -2598,7 +2605,7 @@ static void* createTable(void *sarg)
           free(buffer);
           return NULL;
         }
-  
+
         len += snprintf(buffer + len,
                 superTblInfo->maxSqlLen - len,
                 "if not exists %s.%s%d using %s.%s tags %s ",
@@ -2607,7 +2614,7 @@ static void* createTable(void *sarg)
                 superTblInfo->sTblName, tagsValBuf);
         free(tagsValBuf);
         batchNum++;
-  
+
         if ((batchNum < superTblInfo->batchCreateTableNum)
                 && ((superTblInfo->maxSqlLen - len)
                     >= (superTblInfo->lenOfTagOfOneRow + 256))) {
@@ -4499,7 +4506,7 @@ static int generateSQLHead(char *tableName, int32_t tableSeq,
     if (AUTO_CREATE_SUBTBL == superTblInfo->autoCreateTable) {
       char* tagsValBuf = NULL;
       if (0 == superTblInfo->tagSource) {
-            tagsValBuf = generateTagVaulesForStb(superTblInfo);
+            tagsValBuf = generateTagVaulesForStb(superTblInfo, tableSeq);
       } else {
             tagsValBuf = getTagValueFromTagSample(
                     superTblInfo,