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Jakob Huber
postgres-lambda-diff
Commits
790c6669
Commit
790c6669
authored
20 years ago
by
Bruce Momjian
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Update FAQ text file.
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790c6669
Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Sat Jan 29 23:
25:05
EST 2005
Last updated: Sat Jan 29 23:
44:48
EST 2005
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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@@ -481,22 +481,17 @@
may not be duplicated.
If postmaster is running, start psql in one window, then find the PID
of the postgres process used by psql using
SELECT pg_backend_pid()
. Use a debugger to attach to the postgres PID. You can set
breakpoints in the debugger and issue queries from psql. If you are
debugging postgres startup, you can set PGOPTIONS="-W n", then start
psql. This will cause startup to delay for n seconds so you can attach
to the process with the debugger, set any breakpoints, and continue
through the startup sequence.
There are several
log_*
server configuration variables that enable printing of process
statistics which can be very useful for debugging and performance
measurements.
of the postgres process used by psql using SELECT pg_backend_pid().
Use a debugger to attach to the postgres PID. You can set breakpoints
in the debugger and issue queries from psql. If you are debugging
postgres startup, you can set PGOPTIONS="-W n", then start psql. This
will cause startup to delay for n seconds so you can attach to the
process with the debugger, set any breakpoints, and continue through
the startup sequence.
There are several log_* server configuration variables that enable
printing of process statistics which can be very useful for debugging
and performance measurements.
You can also compile with profiling to see what functions are taking
execution time. The backend profile files will be deposited in the
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@@ -725,11 +720,8 @@ log_*
section 4.10.
* The default C locale must be used during initdb because it is not
possible to know the next-greater character in a non-C locale. You
can create a special
text_pattern_ops
index for such cases that work only for
LIKE
indexing.
can create a special text_pattern_ops index for such cases that
work only for LIKE indexing.
In pre-8.0 releases, indexes often can not be used unless the data
types exactly match the index's column types. This is particularly
...
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@@ -919,7 +911,7 @@ BYTEA bytea variable-length byte array (null-byte safe)
4.17) How do I create a column that will default to the current time?
Use CURRENT_TIMESTAMP:
CREATE TABLE test (x int, modtime timestamp DEFAULT CURRENT_TIMESTAMP );
CREATE TABLE test (x int, modtime timestamp DEFAULT CURRENT_TIMESTAMP );
4.18) How do I perform an outer join?
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alink=
"#0000ff"
>
<H1>
Frequently Asked Questions (FAQ) for PostgreSQL
</H1>
<P>
Last updated: Sat Jan 29 23:
25:05
EST 2005
</P>
<P>
Last updated: Sat Jan 29 23:
44:48
EST 2005
</P>
<P>
Current maintainer: Bruce Momjian (
<A
href=
"mailto:pgman@candle.pha.pa.us"
>
pgman@candle.pha.pa.us
</A>
)
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