Re: SQL Diff ?

Kevin Kempter wrote:
> Hi List;
>
> I have a very large table (52million rows) - I'm creating a copy of it to rid
> it of 35G worth of dead space, then I'll do a sync, drop the original table
> and rename table2.
>
> Once I have the table2 as a copy of table1 what's the best way to select all
> rows that have been changed, modified in table1  since the initial laod from
> table1 into table2?
>
> Also I'll need to delete any rows in table2 that no longer remain in table1.
>

Set log_statement to 'mod' (or 'ddl' if you expect any changes to the
schema itself) in postgresql.conf. Then it's just a matter of parsing
out the mods in the log.