From aafe72efb2d9a01db77bacf94b9b103042b5eb60 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Sat, 27 Apr 2002 03:04:08 +0000
Subject: [PATCH] Update DROP COLUMN example to use transactions and
rollback-able DROP TABLE>
---
doc/FAQ | 5 ++++-
doc/src/FAQ/FAQ.html | 5 ++++-
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/doc/FAQ b/doc/FAQ
index 791cfbd9d37..2c4193a833d 100644
--- a/doc/FAQ
+++ b/doc/FAQ
@@ -1,7 +1,7 @@
Frequently Asked Questions (FAQ) for PostgreSQL
- Last updated: Thu Apr 18 00:44:51 EDT 2002
+ Last updated: Fri Apr 26 23:03:46 EDT 2002
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
@@ -637,11 +637,14 @@
4.4) How do you remove a column from a table?
We do not support ALTER TABLE DROP COLUMN, but do this:
+ BEGIN;
+ LOCK TABLE old_table;
SELECT ... -- select all columns but the one you want to remove
INTO TABLE new_table
FROM old_table;
DROP TABLE old_table;
ALTER TABLE new_table RENAME TO old_table;
+ COMMIT;
4.5) What is the maximum size for a row, a table, and a database?
diff --git a/doc/src/FAQ/FAQ.html b/doc/src/FAQ/FAQ.html
index 8f0dbb11bbc..988aa3f968f 100644
--- a/doc/src/FAQ/FAQ.html
+++ b/doc/src/FAQ/FAQ.html
@@ -14,7 +14,7 @@
alink="#0000ff">
<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
- <P>Last updated: Thu Apr 18 00:44:51 EDT 2002</P>
+ <P>Last updated: Fri Apr 26 23:03:46 EDT 2002</P>
<P>Current maintainer: Bruce Momjian (<A href=
"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR>
@@ -827,11 +827,14 @@
<P>We do not support <SMALL>ALTER TABLE DROP COLUMN,</SMALL> but do
this:</P>
<PRE>
+ BEGIN;
+ LOCK TABLE old_table;
SELECT ... -- select all columns but the one you want to remove
INTO TABLE new_table
FROM old_table;
DROP TABLE old_table;
ALTER TABLE new_table RENAME TO old_table;
+ COMMIT;
</PRE>
<H4><A name="4.5">4.5</A>) What is the maximum size for a row, a
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