Hi, i am trying to define user define function which has argument integer bat and returning integer. step 1: i have added function defination in udf_80.sql as follow create function xtest(one integer) returns integer external name udf.xtest; step 2: i have added function defination in udf.mal module udf; command xtest(b:bat[:oid,:int]):int address UDFBATxtest comment "function xtest"; module batudf; command xtest(b:bat[:oid,:int]):int address UDFBATxtest comment "function xtest"; step 3: then i have define this function in udf.c file UDFBATxtest_(int *ret, BAT *src) { return MAL_SUCCEED; } str UDFBATxtest(int *ires, bat *ione) { BAT *bone = NULL; str msg = NULL; /* assert calling sanity */ assert(ione != NULL); /* bat-id -> BAT-descriptor */ if ((bone = BATdescriptor(*ione)) == NULL) throw(MAL, "batudf.xtest", RUNTIME_OBJECT_MISSING); /* do the work */ msg = UDFBATxtest_ ( ires, bone); return msg; } step 4: then i have compiled source code and installed it: step 5: i am try to execute xtest function on mclient but i got following error sql>select xtest(id) from student; TypeException:user.s23_1[16]:'udf.xtest' undefined in: _53:any := udf.xtest(_51:int) TypeException:user.s23_1[17]:'bat.insert' undefined in: _54:any := bat.insert(_45:bat[:oid,:int], _50:oid, _53:any) program contains errors step 6: write a mail and sent to you for getting help i hope you will give me. -- Regards, Swapnil K. Joshi _______________________________________________ users-list mailing list users-list@monetdb.org http://mail.monetdb.org/mailman/listinfo/users-list