Update tscUtil.c

add additional check when super table uid is 0.

src/client/src/tscUtil.c

@@ -64,7 +64,7 @@ void tscGetMetricMetaCacheKey(SSqlCmd* pCmd, char* str, uint64_t uid) {
   size_t redundantLen = 20;
 
   size_t bufSize = strlen(pMeterMetaInfo->name) + tbnameCondLen + strlen(join) + strlen(tagIdBuf);
-  if (cond != NULL) {
+  if (cond != NULL && cond->cond != NULL) {
     bufSize += strlen(cond->cond);
   }
 
@@ -72,7 +72,7 @@ void tscGetMetricMetaCacheKey(SSqlCmd* pCmd, char* str, uint64_t uid) {
   char* tmp = calloc(1, bufSize);
 
   int32_t keyLen = snprintf(tmp, bufSize, "%s,%s,%s,%d,%s,[%s],%d", pMeterMetaInfo->name,
-                            (cond != NULL ? cond->cond : NULL), (tbnameCondLen > 0 ? pTagCond->tbnameCond.cond : NULL),
+                            (cond != NULL && cond->cond != NULL) ? cond->cond : NULL), (tbnameCondLen > 0 ? pTagCond->tbnameCond.cond : NULL),
                             pTagCond->relType, join, tagIdBuf, pCmd->groupbyExpr.orderType);
 
   assert(keyLen <= bufSize);