Creating a shared-object file for a C UDR
About this task
To create a shared-object file for a C UDR:
Procedure
- Create a shared-object file and put the UDR object file
(.o file) into this shared-object file.
You can put C functions for related UDRs into the same shared-object file. However, the name of each C function must be unique within the shared-object file.
- Put the shared-object file in a directory on which the
user informix has read permission and the shared-object owner
has write permission.
The shared-object file must not have permissions that allow any user other than user informix to have write permission.
- Specify the path of the shared-object file in the EXTERNAL
NAME clause of the CREATE FUNCTION (or CREATE PROCEDURE) statement
when you register the C UDR.
The shared-object file does not have to exist before you register its path with CREATE FUNCTION or CREATE PROCEDURE. However, at UDR runtime, the paths of the shared-object file and the registered UDR must match for the database server to locate the UDR.
Results
all
, the database
server issues error -9793 and writes a message in the log file when
someone tries to execute any UDR in the shared object.For more information, see Execute a UDR. For information about how to create a shared-object file, see the Informix® User-Defined Routines and Data Types Developer's Guide.