Function GetDatabasePath

src/common/relpath.c:109–129

* GetDatabasePath - construct path to a database directory * * Result is a palloc'd string. * * XXX this must agree with GetRelationPath()! */

 * XXX this must agree with GetRelationPath()!
 */
char *
GetDatabasePath(Oid dbNode, Oid spcNode)
{
	if (spcNode == GLOBALTABLESPACE_OID)
	{
		/* Shared system relations live in {datadir}/global */
		Assert(dbNode == 0);
		return pstrdup("global");
	}
	else if (spcNode == DEFAULTTABLESPACE_OID)
	{
		/* The default tablespace is {datadir}/base */
		return psprintf("base/%u", dbNode);
	}
	else
	{
		/* All other tablespaces are accessed via symlinks */
		return psprintf("pg_tblspc/%u/%s/%u",
						spcNode, GP_TABLESPACE_VERSION_DIRECTORY, dbNode);
	}
}

/*
 * GetRelationPath - construct path to a relation's file