On Wed, Nov 10, 2004 at 09:18:21AM +0000, Sam Mason wrote: > > mkfifo db1 > psql -h "db1" -t -q -c "$query" > db1 > mkfifo db2 > psql -h "db2" -t -q -c "$query" > db2 > diff -u -0 db1 db2
This should work for small data sets, but the OP said the tables were about 5G. Unless you use a cursor, psql will fetch the entire result before writing anything. Also, some implementations of diff might read all of the data from one file before reading much from the other file, especially if the files have differences. Hope you have lots of memory.... -- Michael Fuhr http://www.fuhr.org/~mfuhr/ ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
