Error running a simple C routine.

[Minhajuddin]

Hi all,

I have a simple c routine.

Code: Select all

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

int simpleRoutine(int i)
{
i = 101010;
return i;
}

I have compiled it into an obj file "simpleRoutine.obj". And I created a routine in Datastage, with the settings:

Routine Name: simpleRoutineds
Type: External Function
Object Type : Object
External subroutine name: simpleRoutine
Return type: int
Library Path: C:\osh\
Arguments:
argument Name: i
I/O type: I
Native type: int


I have set the library path to C:\osh\ where I have the object file for this routine.


But, when I try to compile a job using this routine it is throwing up an error. Please help me debug it. Here is the error:

Code: Select all

Output from transformer compilation follows:

##I TFCN 000001 10:01:38(000) <main_program> 
Ascential DataStage(tm) Enterprise Edition 7.5
Copyright (c) 2004, 1997-2004 Ascential Software Corporation.
All Rights Reserved


##I TOSH 000002 10:01:38(001) <main_program> orchgeneral: loaded
##I TOSH 000002 10:01:38(002) <main_program> orchsort: loaded
##I TOSH 000002 10:01:38(003) <main_program> orchstats: loaded
##W TFPA 000012 10:01:38(006) <main_program> Warning: the PWD environment variable is not defined. Remote process startup may be unsuccessful as a result.If your ORCHESTRATE job does not start up correctly, please set your PWD variable to a value that will work on all nodes of your system.
##E TBLD 000000 10:01:52(000) <main_program> Error when checking composite operator: Subprocess command failed with exit status 40192
##E TFSR 000019 10:01:52(001) <main_program> Could not check all operators because of previous error(s)
##W TFCP 000000 10:01:52(002) <transform> Error when checking composite operator:  The number of reject datasets "0"is less than the number of input datasets "1".
##I TBLD 000000 10:01:52(003) <main_program> Error when checking composite operator: Output from subprocess: C:\Ascential\DataStage\Projects\Test\RT_BP11.O\V0S3_cRoutine_Transformer_3.C(239) : warning C4244: '=' : conversion from 'APT_Int64' to 'int', possible loss of data

##W TFCP 000025 10:01:52(004) <transform> Error when checking composite operator: Possible range limitation
##W TFCP 000000 10:01:52(005) <transform> Error when checking composite operator:  Implicit conversion from source type "Int32" to result type "Decimal".
##I TFCP 000008 10:01:52(006) <transform> Error when checking composite operator: cxx    -LC:/Ascential/DataStage/Projects/Test/RT_BP11.O/ -LC:/Ascential/DataStage/PXEngine/lib -LC:/Ascential/DataStage/PXEngine/user_lib -W/TP -W/dll -W/base:0x50000000 -lliborchnt -lliborchcorent -lliborchbuildopnt C:\osh\.o C:/Ascential/DataStage/Projects/Test/RT_BP11.O/V0S3_cRoutine_Transformer_3.tmp.o -o C:/Ascential/DataStage/Projects/Test/RT_BP11.O/V0S3_cRoutine_Transformer_3.dll
##I TBLD 000000 10:01:52(007) <main_program> Error when checking composite operator: Output from subprocess: LINK : warning LNK4224: /DEBUGTYPE:BOTH is no longer supported;  ignored

##I TBLD 000000 10:01:52(008) <main_program> Error when checking composite operator: Output from subprocess: LINK : fatal error LNK1181: cannot open input file 'C:osh.o'

##E TCOS 000029 10:01:52(009) <main_program> Creation of step finished with status = FAILED (cRoutine.Transformer_3)

*** Internal Generated Transformer Code follows:
0001: //
0002: // Generated file to implement the V0S3_repos_Transformer_3 transform operator.
0003: //
0004: 
0005: // define external functions used
0006: extern int32 simpleRoutine(int32 i);
0007: 
0008: // define our input/output link names
0009: inputname 0 DSLink2;
0010: outputname 0 DSLink6;
0011: 
0012: initialize {
0013: 	// define our row rejected variable
0014: 	int8 RowRejected0;
0015: 
0016: 	// define our null set variable
0017: 	int8 NullSetVar0;
0018: 
0019: }
0020: 
0021: mainloop {
0022: 	// initialise our row rejected variable
0023: 	RowRejected0 = 1;
0024: 
0025: 	// evaluate columns (no constraints) for link: DSLink6
0026: 	DSLink6.state = simpleRoutine(2);
0027: 	DSLink6.agg_popn = DSLink2.population;
0028: 	writerecord 0;
0029: 	RowRejected0 = 0;
0030: }
0031: 
0032: finish {
0033: }
0034: 
*** End of Internal Generated Transformer Code

[ray.wurlod]

Modifying the input argument in a function is never a good plan - you can get unwanted side effects. What did you actually want this function to accomplish?

[Minhajuddin]

Hi Ray,

I wanted to get started with c routines. It's just a simple routine which just returns a number '101010'. I thought if this ran fine.. I could dive into more complex routines.....

[kduke]

If you look at the settings within DataStage it will tell you the compiler name and options used. You need to match these to create your own routines. Do a search there are several posts explaining how to do this.

[Minhajuddin]

Hi Kim,

I searched the forum but didn't get the exact method of linking a c routine... maybe I am missing something....

And even the datastage documentation doesn't have an example of a c routine.....

[ray.wurlod]

Compiling and linking C routines is usually achieved using what's called a "make file". Research this term in your C language manuals. Under the covers the compiler gets involved, so too might other commands such as ld - it really depends on what your routine requires. It's impossible, really, to give a generic "one size fits all" answer.

[shivadas]

Hi Muju,

Did you got any soluction how to build and use c routine in DS