fishing out LOG: duration lines from the logfile.

Hi,

I think its not going to a trivial task to take out only the LOG duration
lines from a PostgreSQL logfile. We need to extract the duration and
the actual statement. I think i will put a custom delimeters around the
statements for the time being so that the log parser can parse it
unambigiously. Is there any better method?

Regds
Mallah.

Example Log file:

LOG: duration: 3.725 ms statement: SELECT c.oid,
n.nspname,
c.relname
FROM pg_catalog.pg_class c
LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE pg_catalog.pg_table_is_visible(c.oid)
AND c.relname ~ '^users$'
ORDER BY 2, 3;

other log messages
other log messages
other log messages

LOG: duration: 0.705 ms statement: SELECT relhasindex, relkind,
relchecks, reltriggers, relhasrules
FROM pg_catalog.pg_class WHERE oid = '17411'
LOG: duration: 5.929 ms statement: SELECT a.attname,
pg_catalog.format_type(a.atttypid, a.atttypmod),
a.attnotnull, a.atthasdef, a.attnum
FROM pg_catalog.pg_attribute a
WHERE a.attrelid = '17411' AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
LOG: duration: 0.799 ms statement: SELECT substring(d.adsrc for 128)
FROM pg_catalog.pg_attrdef d
WHERE d.adrelid = '17411' AND d.adnum = 1
LOG: duration: 0.965 ms statement: SELECT substring(d.adsrc for 128)
FROM pg_catalog.pg_attrdef d
WHERE d.adrelid = '17411' AND d.adnum = 31
LOG: duration: 0.998 ms statement: SELECT substring(d.adsrc for 128)
FROM pg_catalog.pg_attrdef d
WHERE d.adrelid = '17411' AND d.adnum = 33
LOG: duration: 2.288 ms statement: SELECT c2.relname, i.indisprimary,
i.indisunique, pg_catalog.pg_get_indexdef(i.indexrelid)
FROM pg_catalog.pg_class c, pg_catalog.pg_class c2,
pg_catalog.pg_index i
WHERE c.oid = '17411' AND c.oid = i.indrelid AND i.indexrelid =
c2.oid
ORDER BY i.indisprimary DESC, i.indisunique DESC, c2.relname

LOG: duration: 2.288 ms statement: SELECT c2.relname, i.indisprimary,
i.indisunique, pg_catalog.pg_get_indexdef(i.indexrelid)
FROM pg_catalog.pg_class c, pg_catalog.pg_class c2,
pg_catalog.pg_index i
WHERE c.oid = '17411' AND c.oid = i.indrelid AND i.indexrelid =
c2.oid
ORDER BY i.indisprimary DESC, i.indisunique DESC, c2.relname
:statement end (<-- custom delimit)