Method execute

src/jrd/jrd.cpp:5071–5114

ITransaction* JStatement::execute(CheckStatusWrapper* user_status, ITransaction* apiTra,
	IMessageMetadata* inMetadata, void* inBuffer, IMessageMetadata* outMetadata, void* outBuffer)
{
	JTransaction* jt = NULL;

	try
	{
		if (apiTra)
			jt = getAttachment()->getTransactionInterface(user_status, apiTra);

		EngineContextHolder tdbb(user_status, this, FB_FUNCTION);

		jrd_tra* tra = jt ? jt->getHandle() : NULL;

		if (tra)
			validateHandle(tdbb, tra);

		check_database(tdbb);

		try
		{
			DSQL_execute(tdbb, &tra, getHandle(),
				inMetadata, static_cast<UCHAR*>(inBuffer),
				outMetadata, static_cast<UCHAR*>(outBuffer));

			jt = checkTranIntf(getAttachment(), jt, tra);
		}
		catch (const Exception& ex)
		{
			transliterateException(tdbb, ex, user_status, "JStatement::execute");
			jt = checkTranIntf(getAttachment(), jt, tra);
			return jt;
		}
		trace_warning(tdbb, user_status, "JStatement::execute");
	}
	catch (const Exception& ex)
	{
		ex.stuffException(user_status);
		return apiTra;
	}

	successful_completion(user_status);
	return jt;
}


JResultSet* JStatement::openCursor(CheckStatusWrapper* user_status, ITransaction* transaction,