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Update FAQ.

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Bruce Momjian
1999-09-28 05:10:18 +00:00
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Frequently Asked Questions (FAQ) for PostgreSQL Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Wed Sep 1 19:26:40 EDT 1999 Last updated: Tue Sep 28 01:06:15 EDT 1999
Current maintainer: Bruce Momjian (maillist@candle.pha.pa.us) Current maintainer: Bruce Momjian (maillist@candle.pha.pa.us)
@@ -95,6 +95,7 @@
4.20) How do I tell what PostgreSQL version I am running? 4.20) How do I tell what PostgreSQL version I am running?
4.21) My large-object operations get invalid large obj descriptor. 4.21) My large-object operations get invalid large obj descriptor.
Why? Why?
4.22) How do I create a column that will default to the current time?
Extending PostgreSQL Extending PostgreSQL
@@ -196,8 +197,9 @@
The database server is now working on Windows NT using the Cygnus The database server is now working on Windows NT using the Cygnus
Unix/NT porting library. See pgsql/doc/README.NT in the distribution. Unix/NT porting library. See pgsql/doc/README.NT in the distribution.
There is another port using U/Win at There is also a web page at
http://surya.wipro.com/uwin/ported.html. http://members.tripod.com/~kevlo/postgres/portNT.html. There is
another port using U/Win at http://surya.wipro.com/uwin/ported.html.
1.5) Where can I get PostgreSQL? 1.5) Where can I get PostgreSQL?
@@ -254,7 +256,7 @@
1.7) What is the latest release of PostgreSQL? 1.7) What is the latest release of PostgreSQL?
The latest release of PostgreSQL is version 6.5. The latest release of PostgreSQL is version 6.5.2.
We plan to have major releases every four months. We plan to have major releases every four months.
@@ -580,7 +582,7 @@
You need to increase the postmaster's limit on how many concurrent You need to increase the postmaster's limit on how many concurrent
backend processes it can start. backend processes it can start.
In Postgres 6.5, the default limit is 32 processes. You can increase In Postgres 6.5.*, the default limit is 32 processes. You can increase
it by restarting the postmaster with a suitable -N value. With the it by restarting the postmaster with a suitable -N value. With the
default configuration you can set -N as large as 1024; if you need default configuration you can set -N as large as 1024; if you need
more, increase MAXBACKENDS in include/config.h and rebuild. You can more, increase MAXBACKENDS in include/config.h and rebuild. You can
@@ -903,6 +905,18 @@ BYTEA bytea variable-length array of bytes
If you are using a client interface like ODBC you may need to set If you are using a client interface like ODBC you may need to set
auto-commit off. auto-commit off.
4.22) How do I create a column that will default to the current time?
The tempation is to do:
create table test (x int, modtime timestamp default 'now');
but this makes the column default to the time of table creation, not
the time of row insertion. Instead do:
create table test (x int, modtime timestamp default text 'now');
The casting of the value to text prevents the default value from being
computed at table creation time, and delays it until insertion time.
_________________________________________________________________ _________________________________________________________________
Extending PostgreSQL Extending PostgreSQL