support pow(min(col), 2)

src/client/src/tscSQLParser.c

@@ -1886,7 +1886,6 @@ static int32_t handleAggregateExpr(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_
   pSqlExpr->param[0].nType = TSDB_DATA_TYPE_BINARY;
 
 //    tbufCloseWriter(&bw); // TODO there is a memory leak
-  tExprTreeDestroy(pInfo->pExpr->pExpr, NULL);
   return TSDB_CODE_SUCCESS;
 }
 

src/common/inc/texpr.h

@@ -115,7 +115,7 @@ typedef struct tExprNode {
     struct {
       int16_t functionId;
       uint8_t numChildren;
-      struct tExprNode** pChildren;
+      struct tExprNode **pChildren;
     } _func;
   };
   int16_t resultType;

src/common/src/texpr.c

@@ -956,6 +956,8 @@ tExprNode* exprdup(tExprNode* pNode) {
   }
 
   pCloned->nodeType = pNode->nodeType;
+  pCloned->resultType = pNode->resultType;
+  pCloned->resultBytes = pNode->resultBytes;
   return pCloned;
 }