ANSI C, C

#include <dctam.h>
int  dc_tam_rewrite (DCLONG tblid, struct DC_TAMKEY
                     *keyadr, int keyno, char *datadr,
                     int datsize, DCLONG flags)

K&R C

#include <dctam.h>
int  dc_tam_rewrite (tblid, keyadr, keyno, datadr, datsize,
                     flags)
DCLONG    tblid;
struct DC_TAMKEY *keyadr;
int       keyno;
char      *datadr;
int       datsize;
DCLONG    flags;

The function dc_tam_rewrite() updates and outputs a record input by the function dc_tam_read.

Once the function dc_tam_read() is called to input a record for update processing, the function dc_tam_rewrite() can be called any number of times before the synchronization point of the transaction is acquired. However, the function dc_tam_rewrite() cannot be called after the function dc_tam_delete() or dc_tam_read_cancel().

If the function dc_tam_rewrite() returns with an error, all the resources specified within this function are released, and the status before this function was called is regained.

When a request is made to update multiple specified records, even if one of the records causes an error, the processing of all the records specified in this function results in an error.

The key value storage location in the update data and the key area length are as specified in the tamcre command used for creation of a TAM table file.

The data part has a key value if the key value is assigned to the data part (the -s option not specified in the tamcre command) when a TAM table file is created. Therefore, an error is returned if the key value specified in the function dc_tam_rewrite() is not found in the update data. The data part has no key value if no key value is assigned to the data part (the -s option specified in the tamcre command). In this case, no check is made on the contents of the update data.

tblid

Specify the table descriptor of the TAM table whose record is to be updated. The table descriptor is the value returned with the function dc_tam_open().

keyadr

Specify the address of the structure having the address of the key value of the record to be updated. The structure format is as follows:

struct DC_TAMKEY {
                  char *keyname;
                 };

• keyname
  Specify the address of the key value. The key value must be specified with the length of the key area of the record to be updated.
  

keyno

Specify the number of request records (number of structures specified for keyadr).

datadr

Specify the address of the update data.

datsize

Specify the length of the update data. The update data length must be equal to or greater than (record length x number of request records).

flags

Specify DCNOFLAGS.