ILE C considerations for DDM

 

ILE C programs can refer to DDM files.

Generally, DDM file names can be specified in ILE C programming language anywhere a database file name can be specified, for both iSeries™ and non-iSeries target servers.

Specify DDM file names on the Create C Program (CRTCPGM) command to do the following items:

• Access remote files on an iSeries or non-iSeries server that contains source statements. To do this, specify a DDM file name on the SRCFILE parameter, and a member name on the SRCMBR parameter. Notes:

  1. For iSeries or System/38™ target systems, you access a remote iSeries or System/38 source file (or member) in the same manner as a local source file and member.

  2. For non-iSeries target servers, access a remote source file by using the same file name for the SRCMBR and the SRCFILE parameters.

• Place the compiler listing in a database file on a target server. To do this, specify a DDM file name on the PRTFILE parameter of the CRTCPGM command.

When using ILE C programming language, consider the following items:

• If the target system is not an iSeries server or a System/38, you can specify a DDM file name as the include file on the #INCLUDE source directive statement, but the member name must be the same as the DDM file name.

• ILE C programming language only supports sequential I/O operations.

• Although ILE C programming language does not directly support keyed files, key exceptions might occur if you are using a keyed file.

 

Parent topic:

Programming language considerations for DDM