C++ (Cpp) show_gp_session_roleの例

コード例 #1

ファイル: cdbvars.c プロジェクト: happyjoblzp/gpdb

/*
 * Assign hook routine for "gp_session_role" option.  Because this variable
 * has context PGC_BACKEND, we expect this assigment to happen only during
 * setup of a BACKEND, e.g., based on the role value specified on the connect
 * request.
 *
 * See src/backend/util/misc/guc.c for option definition.
 */
const char *
assign_gp_session_role(const char *newval, bool doit, GucSource source __attribute__((unused)) )
{

#if FALSE
	elog(DEBUG1, "assign_gp_session_role: gp_session_role=%s, newval=%s, doit=%s",
		 show_gp_session_role(), newval, (doit ? "true" : "false"));
#endif

	GpRoleValue newrole = string_to_role(newval);

	if (newrole == GP_ROLE_UNDEFINED)
	{
		return NULL;
	}

	if (doit)
	{
		Gp_session_role = newrole;
		Gp_role = Gp_session_role;

		if (Gp_role == GP_ROLE_DISPATCH)
			Gp_segment = -1;
	}
	return newval;
}

コード例 #2

ファイル: cdbvars.c プロジェクト: PengJi/gpdb-comments

/*
 * Assign hook routine for "gp_session_role" option.  Because this variable
 * has context PGC_BACKEND, we expect this assigment to happen only during
 * setup of a BACKEND, e.g., based on the role value specified on the connect
 * request.
 *
 * See src/backend/util/misc/guc.c for option definition.
 */
const char *
assign_gp_session_role(const char *newval, bool doit, GucSource source __attribute__((unused)))
{
#if FALSE
	elog(DEBUG1, "assign_gp_session_role: gp_session_role=%s, newval=%s, doit=%s",
		 show_gp_session_role(), newval, (doit ? "true" : "false"));
#endif

	GpRoleValue newrole = string_to_role(newval);

	if (newrole == GP_ROLE_UNDEFINED)
	{
		return NULL;
	}

	/* Force utility mode in a stand-alone backend. */
	if (!IsPostmasterEnvironment && newrole != GP_ROLE_UTILITY)
	{
		if (source != PGC_S_DEFAULT)
			elog(WARNING, "gp_session_role forced to 'utility' in single-user mode");

		newval = strdup("utility");
		newrole = GP_ROLE_UTILITY;
	}

	if (doit)
	{
		Gp_session_role = newrole;
		Gp_role = Gp_session_role;

		if (Gp_role == GP_ROLE_DISPATCH)
			Gp_segment = -1;

		if (Gp_role == GP_ROLE_UTILITY && MyProc != NULL)
			MyProc->mppIsWriter = false;
	}
	return newval;
}