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/** Implementation of the pqxx::transaction class.
*
* pqxx::transaction represents a regular database transaction.
*
* Copyright (c) 2000-2019, Jeroen T. Vermeulen.
*
* See COPYING for copyright license. If you did not receive a file called
* COPYING with this source code, please notify the distributor of this mistake,
* or contact the author.
*/
#include "pqxx/compiler-internal.hxx"
#include <stdexcept>
#include "pqxx/connection_base"
#include "pqxx/result"
#include "pqxx/transaction"
pqxx::internal::basic_transaction::basic_transaction(
connection_base &C,
const std::string &IsolationLevel,
readwrite_policy rw) :
namedclass{"transaction"},
dbtransaction(C, IsolationLevel, rw)
{
}
void pqxx::internal::basic_transaction::do_commit()
{
try
{
direct_exec("COMMIT");
}
catch (const statement_completion_unknown &e)
{
// Outcome of "commit" is unknown. This is a disaster: we don't know the
// resulting state of the database.
process_notice(e.what() + std::string{"\n"});
const std::string msg =
"WARNING: Commit of transaction '" + name() + "' is unknown. "
"There is no way to tell whether the transaction succeeded "
"or was aborted except to check manually.";
process_notice(msg + "\n");
throw in_doubt_error{msg};
}
catch (const std::exception &e)
{
if (not conn().is_open())
{
// We've lost the connection while committing. There is just no way of
// telling what happened on the other end. >8-O
process_notice(e.what() + std::string{"\n"});
const std::string Msg =
"WARNING: Connection lost while committing transaction "
"'" + name() + "'. "
"There is no way to tell whether the transaction succeeded "
"or was aborted except to check manually.";
process_notice(Msg + "\n");
throw in_doubt_error{Msg};
}
else
{
// Commit failed--probably due to a constraint violation or something
// similar.
throw;
}
}
}
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