// Begin a transaction.
static void sedna_begin(SC *conn)
{
int res;
// Disable autocommit mode.
SEDNA_AUTOCOMMIT_DISABLE(conn);
// Start the transaction.
res = SEbegin(conn);
VERIFY_RES(SEDNA_BEGIN_TRANSACTION_SUCCEEDED, res, conn);
}
int main()
{
struct SednaConnection conn = SEDNA_CONNECTION_INITIALIZER;
int bytes_read, res, value;
char buf[1024];
const char* url = "localhost";
const char* db_name = "testdb";
const char* login = "******";
const char* password = "******";
printf("Client started.\n");
value = SEDNA_AUTOCOMMIT_OFF;
res = SEsetConnectionAttr(&conn, SEDNA_ATTR_AUTOCOMMIT, (void*)&value, sizeof(int));
//connecting to database "testdb" with login "SYSTEM", password "MANAGER"
res = SEconnect(&conn, url, db_name, login, password);
if(res != SEDNA_SESSION_OPEN)
{
printf("Session starting failed: \n%s\n", SEgetLastErrorMsg(&conn));
return -1;
}
//begin transaction
res = SEbegin(&conn);
if(res != SEDNA_BEGIN_TRANSACTION_SUCCEEDED)
{
printf("Begin transaction failed: \n%s\n", SEgetLastErrorMsg(&conn));
//closing session
SEclose(&conn);
return -1;
}
// load data from file "region.xml" into the document "region"
res = SEexecute(&conn, "LOAD \"..\\data\\region.xml\" \"region\"");
if(res != SEDNA_BULK_LOAD_SUCCEEDED)
{
printf("Bulk load failed: \n%s\n", SEgetLastErrorMsg(&conn));
// closing session
SEclose(&conn);
return -1;
}
// execute XQuery query
res = SEexecute(&conn, "doc(\"region\")/*/*");
if(res != SEDNA_QUERY_SUCCEEDED)
{
printf("Query failed: \n%s\n", SEgetLastErrorMsg(&conn));
//closing session
SEclose(&conn);
return -1;
}
// iterate over the result sequence and retrieve the result data
while((res = SEnext(&conn)) != SEDNA_RESULT_END)
{
if (res == SEDNA_ERROR)
{
printf("Failed to get next result item from server: \n%s\n", SEgetLastErrorMsg(&conn));
//closing session
SEclose(&conn);
return -1;
}
printf("\nresult item:\n");
do
{
bytes_read = SEgetData(&conn, buf, 1024 - 1);
if(bytes_read == SEDNA_ERROR)
{
printf("Failed to get result data from server: \n%s\n", SEgetLastErrorMsg(&conn));
//closing session
SEclose(&conn);
return -1;
}
buf[bytes_read] = '\0';
printf("%s", buf);
}while(bytes_read > 0);
printf("\n");
}
// Drop document "region"
res = SEexecute(&conn, "DROP DOCUMENT \"region\"");
if(res != SEDNA_UPDATE_SUCCEEDED)
{
printf("Drop document failed: \n%s\n", SEgetLastErrorMsg(&conn));
// closing session
SEclose(&conn);
return -1;
}
//commiting transaction
res = SEcommit(&conn);
if(res != SEDNA_COMMIT_TRANSACTION_SUCCEEDED)
{
printf("Commit transaction failed: \n%s\n", SEgetLastErrorMsg(&conn));
//closing session
SEclose(&conn);
return -1;
}
//closing session
res = SEclose(&conn);
if(res != SEDNA_SESSION_CLOSED)
{
printf("An error occured while trying to close session: \n%s\n", SEgetLastErrorMsg(&conn));
return -1;
}
return 0;
}