Thread: Getting transaction details from the WAL?
Hello, PostgreSQL community! I am wondering if it is possible to get content changes to a particular table from a point-in-time by exploring the WAL or any other artifacts relating to transaction management. Any help or comment is appreciated! Cheers, Bo
> On May 22, 2021, at 19:00, Bo Guo <bo.guo@gisticinc.com> wrote:
>
> I am wondering if it is possible to get content changes to a particular table from a point-in-time by exploring the
WALor any other artifacts relating to transaction management.
Perhaps the easiest way to do this is to use logical decoding, which you can use to capture changes from the WAL,
convertingthem to other formats. While it forms the basis of logical replication, there are other plug-ins to the
framework. You might look at wal2json:
https://github.com/eulerto/wal2json
or the test plugin in contrib/
https://www.postgresql.org/docs/current/test-decoding.html
This is great, Thanks, Chrsitophe! Bo On 5/22/21 7:03 PM, Christophe Pettus wrote: > >> On May 22, 2021, at 19:00, Bo Guo <bo.guo@gisticinc.com> wrote: >> >> I am wondering if it is possible to get content changes to a particular table from a point-in-time by exploring the WALor any other artifacts relating to transaction management. > Perhaps the easiest way to do this is to use logical decoding, which you can use to capture changes from the WAL, convertingthem to other formats. While it forms the basis of logical replication, there are other plug-ins to the framework. You might look at wal2json: > > https://github.com/eulerto/wal2json > > or the test plugin in contrib/ > > https://www.postgresql.org/docs/current/test-decoding.html