gtpc2mdl | C/C++ Language Support User's Guide |
This function creates an empty persistent sorted set collection using the default data definition (DD) and assigns a persistent identifier (PID) to the collection.
A sorted set collection is the same as a sorted bag collection except that the sort fields of added elements must be unique.
Format
#include <c$to2.h> long TO2_createSortedSet ( TO2_PID_PTR pid_ptr, TO2_ENV_PTR env_ptr, const long *entryLength, const long *sortFieldLength, const long *sortFieldDisplacement);
Normal Return
The normal return is a positive value.
Error Return
An error return is indicated by a zero. When zero is returned, use the TO2_getErrorCode function to determine the specific error code. For more information, see Error Handling.
The following error codes are common for this function:
TO2_ERROR_DATA_LGH
TO2_ERROR_ENV
TO2_ERROR_LOCATOR_LGH
TO2_ERROR_LOCATOR_NOT_UNIQUE
Programming Considerations
A commit scope will be created for the TO2_createSortedSet request. If the request is successful, the scope will be committed. If an error occurs while processing the TO2_createSortedSet request, the scope will be rolled back.
Examples
The following example creates a persistent sorted set collection.
#include <c$to2.h> /* Needed for TO2 API functions */ #include <stdio.h> /* APIs for standard I/O functions */ TO2_ENV_PTR env_ptr; /* PTR to the TO2 environment */ TO2_PID collect; /* will hold collection's PID */ long entryLength; /* PTR to Max Entry Length */ long sortFieldLength; /* PTR to field length */ long sortFieldDisplacement; /* PTR to keyFLD */
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if (TO2_createSortedSet(&collect, env_ptr, &entryLength, &sortFieldLength, &sortFieldDisplacement) == TO2_ERROR) { printf("TO2_createSortedSet failed!\n"); process_error(env_ptr); } else { printf("TO2_createSortedSet successful!\n"); }
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