I am porting a DB2 ESQL to ORACLE ESQL. In DB2 we can pass a structure in procedure by statement

EXEC SQL CALL procedure_name USING DESCRIPTOR: structure_name;

i want to modify the above line for oracle.

Thanks in advance

Since I don't know DB2 or what a DB2 structure looks like
I don't know what might be equivalent in Oracle.

In ESQL/ORACLE we can call procedure BY

EXEC SQL CALL procedure_name(:tr_1,:tr_2,....);

If you can tell me how can i call that procedure using a C structure test1 which is

Struct testpr
{
int tr_1;
int tr_2;
.......
};

struct testpr test1;

instead of (:tr_1,:tr_2,....), that can also be helpful.

I believe that TYPE datatype should meets your requirements.
I suggest you run some simple proof of concept tests to learn what actually works for you.