From 2ccf79a6a16728911602d48c7bfc661e759d20e3 Mon Sep 17 00:00:00 2001
From: Bruce Momjian
Date: Tue, 1 Feb 2005 01:41:37 +0000
Subject: [PATCH] Remove FAQ mention of DROP column.
---
doc/FAQ | 21 ++++++---------------
doc/src/FAQ/FAQ.html | 26 ++++++--------------------
2 files changed, 12 insertions(+), 35 deletions(-)
diff --git a/doc/FAQ b/doc/FAQ
index c092e10b9c..3c35b3c2ec 100644
--- a/doc/FAQ
+++ b/doc/FAQ
@@ -1,7 +1,7 @@
Frequently Asked Questions (FAQ) for PostgreSQL
- Last updated: Mon Jan 31 20:35:58 EST 2005
+ Last updated: Mon Jan 31 20:41:21 EST 2005
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
@@ -51,7 +51,7 @@
4.1) How do I SELECT only the first few rows of a query? A random row?
4.2) How do I find out what tables, indexes, databases, and users are
defined? How do I see the queries used by psql to display them?
- 4.3) How do you remove a column from a table, or change its data type?
+ 4.3) How do you change a column's data type?
4.4) What is the maximum size for a row, a table, and a database?
4.5) How much database disk space is required to store data from a
typical text file?
@@ -491,25 +491,16 @@
query to get information about the database.
There are also system tables beginning with pg_ that describe these
- too. Use psql -l will list all databases.
+ too.
+
+ Use psql -l will list all databases.
Also try the file pgsql/src/tutorial/syscat.source. It illustrates
many of the SELECTs needed to get information from the database system
tables.
- 4.3) How do you remove a column from a table, or change its data type?
+ 4.3) How do you change a column's data type?
- DROP COLUMN functionality was added in release 7.3 with ALTER TABLE
- DROP COLUMN. In earlier versions, you can 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;
-
Changing the data type of a column can be done easily in 8.0 and later
with ALTER TABLE ALTER COLUMN TYPE.
diff --git a/doc/src/FAQ/FAQ.html b/doc/src/FAQ/FAQ.html
index 1385d59012..71fd857710 100644
--- a/doc/src/FAQ/FAQ.html
+++ b/doc/src/FAQ/FAQ.html
@@ -10,7 +10,7 @@
alink="#0000ff">
Frequently Asked Questions (FAQ) for PostgreSQL
- Last updated: Mon Jan 31 20:35:58 EST 2005
+ Last updated: Mon Jan 31 20:41:21 EST 2005
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
@@ -74,8 +74,7 @@
4.2) How do I find out what tables, indexes,
databases, and users are defined? How do I see the queries used
by psql to display them?
- 4.3) How do you remove a column from a
- table, or change its data type?
+ 4.3) How do you change a column's data type?
4.4) What is the maximum size for a row, a
table, and a database?
4.5) How much database disk space is required
@@ -645,28 +644,15 @@
database.
There are also system tables beginning with pg_ that describe
- these too. Use psql -l will list all databases.
+ these too.
+
+ Use psql -l will list all databases.
Also try the file pgsql/src/tutorial/syscat.source. It
illustrates many of the SELECTs needed to get
information from the database system tables.
- 4.3) How do you remove a column from a
- table, or change its data type?
-
- DROP COLUMN functionality was added in release 7.3
- with ALTER TABLE DROP COLUMN. In earlier versions,
- you can 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;
-
+ 4.3) How do you change a column's data type?
Changing the data type of a column can be done easily in 8.0
and later with ALTER TABLE ALTER COLUMN TYPE.
--
2.40.0