The BSRTKEY structure is a structure to define key field in the sort processing or the merging processing.
When the specification of the key field is omitted, the entire record is considered to be a key field.
The size of the area when the area of BSRTKEY structure is secured can be calculated by using BS_KEYTABSIZE(n). BS_KEYTABSIZE(n) is a macro to calculate the size of BSRTKEY structure with 'n' occurrences of BSKEY structure.
Note
The key field is not omissible for text file CSV format and text file TSV format.
typedef struct {
unsigned long entry_no;
BSKEY key_entry[1];
} BSRTKEY;BSRTKEY structure member
In the following, it explains about the member of the BSRTKEY structure.
entry_no
This specifies the number of the key field (BSKEY structure).
When 0 is specified, this means that the key field is omitted.
key_entry[n]
This specifies the key field.
For more information, refer to BSKEY structure.