Merge pull request #20570 from taosdata/szhou/fix-td23266

fix: create function error for json/decimal/blob/varbinary type

source/libs/parser/src/parTranslater.c

@@ -6395,6 +6395,15 @@ static int32_t translateCreateFunction(STranslateContext* pCxt, SCreateFunctionS
   if (fmIsBuiltinFunc(pStmt->funcName)) {
     return generateSyntaxErrMsg(&pCxt->msgBuf, TSDB_CODE_PAR_INVALID_FUNCTION_NAME);
   }
+
+  if (TSDB_DATA_TYPE_JSON == pStmt->outputDt.type ||
+      TSDB_DATA_TYPE_VARBINARY == pStmt->outputDt.type ||
+      TSDB_DATA_TYPE_DECIMAL == pStmt->outputDt.type ||
+      TSDB_DATA_TYPE_BLOB == pStmt->outputDt.type ||
+      TSDB_DATA_TYPE_MEDIUMBLOB == pStmt->outputDt.type) {
+    return generateSyntaxErrMsgExt(&pCxt->msgBuf, TSDB_CODE_PAR_SYNTAX_ERROR, "Unsupported output type for UDF");
+  }
+
   SCreateFuncReq req = {0};
   strcpy(req.name, pStmt->funcName);
   req.igExists = pStmt->ignoreExists;

tests/script/tsim/query/udf.sim

@@ -29,6 +29,9 @@ else
   sql create function bit_and as '/tmp/udf/libbitand.so' outputtype int bufSize 8;
   sql create aggregate function l2norm as '/tmp/udf/libl2norm.so' outputtype double bufSize 8;
 endi
+
+sql_error create function bit_and as '/tmp/udf/libbitand.so' oputtype json;
+
 sql show functions;
 if $rows != 2 then
   return -1