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authorBruce Momjian2005-02-01 01:41:37 +0000
committerBruce Momjian2005-02-01 01:41:37 +0000
commit2ccf79a6a16728911602d48c7bfc661e759d20e3 (patch)
tree6224d0a8141c5e6974b1eb1f7eb9c0efd2e6b4f4 /doc/src
parent25deba3141ecc2d29422e7cd06d0efe0a1d94be1 (diff)
Remove FAQ mention of DROP column.
Diffstat (limited to 'doc/src')
-rw-r--r--doc/src/FAQ/FAQ.html26
1 files changed, 6 insertions, 20 deletions
diff --git a/doc/src/FAQ/FAQ.html b/doc/src/FAQ/FAQ.html
index 1385d590127..71fd8577107 100644
--- a/doc/src/FAQ/FAQ.html
+++ b/doc/src/FAQ/FAQ.html
@@ -10,7 +10,7 @@
alink="#0000ff">
<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
- <P>Last updated: Mon Jan 31 20:35:58 EST 2005</P>
+ <P>Last updated: Mon Jan 31 20:41:21 EST 2005</P>
<P>Current maintainer: Bruce Momjian (<A href=
@@ -74,8 +74,7 @@
<A href="#4.2">4.2</A>) How do I find out what tables, indexes,
databases, and users are defined? How do I see the queries used
by <I>psql</I> to display them?<BR>
- <A href="#4.3">4.3</A>) How do you remove a column from a
- table, or change its data type?<BR>
+ <A href="#4.3">4.3</A>) How do you change a column's data type?<BR>
<A href="#4.4">4.4</A>) What is the maximum size for a row, a
table, and a database?<BR>
<A href="#4.5">4.5</A>) How much database disk space is required
@@ -645,28 +644,15 @@
database.</P>
<P>There are also system tables beginning with <I>pg_</I> that describe
- these too. Use <I>psql -l</I> will list all databases.</P>
+ these too.</P>
+
+ <P>Use <I>psql -l</I> will list all databases.</P>
<P>Also try the file <I>pgsql/src/tutorial/syscat.source</I>. It
illustrates many of the <SMALL>SELECT</SMALL>s needed to get
information from the database system tables.</P>
- <H4><A name="4.3">4.3</A>) How do you remove a column from a
- table, or change its data type?</H4>
-
- <P><SMALL>DROP COLUMN</SMALL> functionality was added in release 7.3
- with <SMALL>ALTER TABLE DROP COLUMN</SMALL>. In earlier versions,
- you can 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="4.3">4.3</A>) How do you change a column's data type?</H4>
<P>Changing the data type of a column can be done easily in 8.0
and later with <SMALL>ALTER TABLE ALTER COLUMN TYPE</SMALL>.