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This is a small fix in FAQ. It just clean up some old comments and 

change an old -not-working piece of code.
This commit is contained in:
Bruce Momjian 2004-06-04 04:09:40 +00:00
parent bf2a115f2f
commit 768916d753
2 changed files with 12 additions and 16 deletions
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12
doc/FAQ
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@ -1,7 +1,7 @@
Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Mon Mar 29 00:07:11 EST 2004
Last updated: Fri Jun 4 00:09:16 EDT 2004
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
@ -965,11 +965,11 @@ BYTEA bytea variable-length byte array (null-byte safe)
all databases. If you want to change the OID to something else, or if
you want to make a copy of the table, with the original OIDs, there is
no reason you can't do it:
CREATE TABLE new_table(old_oid oid, mycol int);
SELECT old_oid, mycol INTO new FROM old;
COPY new TO '/tmp/pgtable';
DELETE FROM new;
COPY new WITH OIDS FROM '/tmp/pgtable';
CREATE TABLE new_table(mycol int);
SELECT oid AS old_oid, mycol INTO tmp_table FROM old_table;
COPY tmp_table TO '/tmp/pgtable';
COPY new_table WITH OIDS FROM '/tmp/pgtable';
DROP TABLE tmp_table;
OIDs are stored as 4-byte integers, and will overflow at 4 billion. No
one has reported this ever happening, and we plan to have the limit

16
doc/src/FAQ/FAQ.html
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@ -10,7 +10,7 @@
alink="#0000ff">
<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
<P>Last updated: Thu May 6 10:22:34 EDT 2004</P>
<P>Last updated: Fri Jun 4 00:09:16 EDT 2004</P>
<P>Current maintainer: Bruce Momjian (<A href=
"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR>
@ -1213,16 +1213,12 @@ BYTEA bytea variable-length byte array (null-byte safe)
of the table, with the original <SMALL>OID</SMALL>s, there is no
reason you can't do it:</P>
<PRE>
CREATE TABLE new_table(old_oid oid, mycol int);
SELECT old_oid, mycol INTO new FROM old;
COPY new TO '/tmp/pgtable';
DELETE FROM new;
COPY new WITH OIDS FROM '/tmp/pgtable';
</PRE>
<!--
CREATE TABLE new_table(mycol int);
INSERT INTO new_table (oid, mycol) SELECT oid, mycol FROM old_table;
-->
SELECT oid AS old_oid, mycol INTO tmp_table FROM old_table;
COPY tmp_table TO '/tmp/pgtable';
COPY new_table WITH OIDS FROM '/tmp/pgtable';
DROP TABLE tmp_table;
</PRE>
<P>O<SMALL>ID</SMALL>s are stored as 4-byte integers, and will
overflow at 4 billion. No one has reported this ever happening, and
we plan to have the limit removed before anyone does.</P>