support join for json tag

src/query/src/qExecutor.c

@@ -3398,7 +3398,7 @@ void setTagValue(SOperatorInfo* pOperatorInfo, void *pTable, SQLFunctionCtx* pCt
   SQueryAttr *pQueryAttr = pRuntimeEnv->pQueryAttr;
 
   SExprInfo* pExprInfo = &pExpr[0];
-  if (pQueryAttr->numOfOutput == 2 && pExprInfo->base.functionId == TSDB_FUNC_TS_COMP && pQueryAttr->stableQuery) {
+  if (pQueryAttr->numOfOutput == 1 && pExprInfo->base.functionId == TSDB_FUNC_TS_COMP && pQueryAttr->stableQuery) {
     assert(pExprInfo->base.numOfParams == 2);
 
     int16_t      tagColId = (int16_t)pExprInfo->base.param[1].i64;

src/util/src/tcompare.c

@@ -488,7 +488,8 @@ __compar_fn_t getComparFunc(int32_t type, int32_t optr) {
       break;
     }
 
-    case TSDB_DATA_TYPE_NCHAR: {
+    case TSDB_DATA_TYPE_NCHAR:
+    case TSDB_DATA_TYPE_JSON:{
       if (optr == TSDB_RELATION_MATCH) {
         comparFn = compareStrRegexCompMatch;
       } else if (optr == TSDB_RELATION_NMATCH) {