modules/ud/ud_serial.c
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FUNCTIONS
This source file includes following functions.
- create_serial
/***************************************
Functions for handling serials
Status: NOT REVUED, NOT TESTED
Author(s): Andrei Robachevsky
******************/ /******************
Modification History:
andrei (08/02/2000) Created.
******************/ /******************
Copyright (c) 2000 RIPE NCC
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of the author not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS; IN NO EVENT SHALL
AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
***************************************/
#include "ud.h"
#include "ud_int.h"
/************************************************************
* create_serial() *
* *
* Creates a serial record for given transaction *
* For updates creates 2 serial records (DEL+ADD) *
* *
* Important fields of transaction are: *
* tr->action TR_CREATE/TR_UPDATE/TR_DELETE *
* tr->object_id should be filled in *
* tr->sequence_id should be set to current *
* *
* Returns: *
* currnt serial number. *
* -1 in case of an error *
* *
*************************************************************/
long create_serial(Transaction_t *tr)
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{
static char query[STR_M];
long current_serial=0;
int sql_err;
/* fprintf(stderr, "creating serial\n"); */
if(!ACT_CREATE(tr->action)) {
/* set the atlast field of the latest record for this object to 0 */
/* because it is moved to history */
sprintf(query, "UPDATE serials SET atlast=0 "
"WHERE object_id=%ld "
"AND sequence_id=%ld ", tr->object_id, tr->sequence_id-1);
sql_err = SQ_execute_query(tr->sql_connection, query, (SQ_result_set_t **)NULL);
if (sql_err) { // we can have empty updates, but not errors
fprintf(stderr, "E: <create_serial>: cannot update %s\n", query);
current_serial=-1;
}
/* generate DEL serial */
sprintf(query, "INSERT serials SET "
"object_id=%ld, "
"sequence_id=%ld, "
"atlast=0, "
"operation=%d ", tr->object_id, tr->sequence_id-1, OP_DEL);
sql_err = SQ_execute_query(tr->sql_connection, query, (SQ_result_set_t **)NULL);
if (sql_err) {
fprintf(stderr, "E: <create_serial>: cannot insert %s\n",query);
current_serial=-1;
}
if(current_serial!=-1)current_serial=mysql_insert_id(tr->sql_connection);
/* there is nothing more to do when OP_DEL */
if(ACT_DELETE(tr->action)) return(current_serial);
}
/* now insert creation serial */
sprintf(query, "INSERT serials SET "
"object_id=%ld, "
"sequence_id=%ld, "
"atlast=1, "
"operation=%d ", tr->object_id, tr->sequence_id, OP_ADD);
sql_err = SQ_execute_query(tr->sql_connection, query, (SQ_result_set_t **)NULL);
if (sql_err) {
fprintf(stderr, "E: <create_serial>: cannot insert %s\n",query);
current_serial=-1;
}
if(current_serial!=-1)current_serial=mysql_insert_id(tr->sql_connection);
return(current_serial);
}