backup_label (after execting pg_start_backup) will have the start transaction log file information, I can this use this file to extract the current time line ID.
Also I guess the time line ID will be changed only when server is recovered. So, I can safely use the same Time Line ID extracted from backup_label to formulate the transaction log file from the output of pg_stop_backup also.
girish R G peetle wrote: > On PostgreSQL 8.0, I need to convert output of pg_start_backup / pg_stop_backup to transaction log > file name. In the the latest versions we have pg_xlogfile_name function to do this, but 8.0 there is > not function to achieve this. > > Is it possible to export pg_xlogfile_name function from the latest versions(8.2+) and import it to > PostgreSQL 8.0 server ? > > I couldn't find any information regrading getting a dump of system function in PostgreSQL > documentation.
You cannot dump/restore this function into 8.0, it needs server side C code.
The best you can probably do is to figure out part of the name yourself, like WAL location '1/80000A8' corresponds to *0000000100000008 (with a wildcard, because we do not know the time line). That's maybe good enough to narrow down which WAL file to archive.