Hi!
Postgres 14 hot standby server server is running in Debian Linux under WSL. It saves wal log from master to pg_wal directory. wal_keep size is 100GB.
Command
pg_recvlogical -P pgoutput -o proto_version=1 -o publication_names=koiktabelid_pub --create-slot --start --slot=naitategevust --dbname=sba --file=tulem.log
writes modification commands to file
Command
pg_recvlogical --create-slot --start --slot=naitategevust --dbname=sba --file=-
show modification commands in screen.
How to specify start time and number of commands to decode as pg_recvlogical parameters?
Output is too verbose, contains data types.
How show next 100 sql commands starting from from some date, eq from March 18,2025 14:21:00 ?
If there is no ready solution, I can create ASP.NET MVC 9 controller for this. Controller should probably ask wal contents from server starting at this time using replication protocol or directly read wal files from pg_wal directory and decode them.
Replication sample in https://www.npgsql.org/doc/replication.html
shows how to decode realtime replication messages for single table.
How to specify start time from which replication commands are retured? Or is there some exisising wal decoder in C# or as command-line utility?
Posted also in
https://stackoverflow.com/questions/79518438/how-to-convert-wal-log-to-sql-commands-from-given-time
Andrus
