Remove blank lines in HTML FAQ.
This commit is contained in:
Bruce Momjian
parent
051b52c886
commit
876ef5d5c9
2
doc/FAQ
2
doc/FAQ
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
Frequently Asked Questions (FAQ) for PostgreSQL
|
||||
|
||||
Last updated: Mon Dec 11 17:44:33 EST 2006
|
||||
Last updated: Mon Dec 11 17:45:54 EST 2006
|
||||
|
||||
Current maintainer: Bruce Momjian (bruce@momjian.us)
|
||||
|
||||
|
|
|
|||
|
|
@ -10,7 +10,7 @@
|
|||
alink="#0000ff">
|
||||
<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
|
||||
|
||||
<P>Last updated: Mon Dec 11 17:44:33 EST 2006</P>
|
||||
<P>Last updated: Mon Dec 11 17:45:54 EST 2006</P>
|
||||
|
||||
<P>Current maintainer: Bruce Momjian (<A href=
|
||||
"mailto:bruce@momjian.us">bruce@momjian.us</A>)
|
||||
|
|
@ -42,7 +42,7 @@
|
|||
development team?<BR>
|
||||
<A href="#item1.13">1.13</A>) How does PostgreSQL compare to other
|
||||
<SMALL>DBMS</SMALL>s?<BR>
|
||||
|
||||
|
||||
|
||||
<H2 align="center">User Client Questions</H2>
|
||||
<A href="#item2.1">2.1</A>) What interfaces are available for
|
||||
|
|
@ -51,7 +51,7 @@
|
|||
PostgreSQL with Web pages?<BR>
|
||||
<A href="#item2.3">2.3</A>) Does PostgreSQL have a graphical user
|
||||
interface?<BR>
|
||||
|
||||
|
||||
|
||||
<H2 align="center">Administrative Questions</H2>
|
||||
<A href="#item3.1">3.1</A>) How do I install PostgreSQL somewhere other
|
||||
|
|
@ -281,7 +281,7 @@
|
|||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
|
||||
|
||||
<H3 id="item1.9">1.9) How do I find out about known bugs or
|
||||
missing features?</H3>
|
||||
|
||||
|
|
@ -307,7 +307,7 @@
|
|||
<li>The new feature is added to the
|
||||
<A href="http://www.postgresql.org/docs/faqs.TODO.html">TODO</A> list</li>
|
||||
</ul>
|
||||
|
||||
|
||||
<P>PostgreSQL does not use a bug tracking system because we find
|
||||
it more efficient to respond directly to email and keep the
|
||||
<A href="http://www.postgresql.org/docs/faqs.TODO.html">TODO</A>
|
||||
|
|
@ -318,7 +318,7 @@
|
|||
<a href="http://www.postgresql.org/developer/sourcecode/">CVS</a>
|
||||
log messages. Even the release notes do not list every change
|
||||
made to the software.</P>
|
||||
|
||||
|
||||
<H3 id="item1.10">1.10) What documentation is available?</H3>
|
||||
|
||||
<P>PostgreSQL includes extensive documentation, including a large
|
||||
|
|
@ -370,7 +370,7 @@
|
|||
"http://mysite.verizon.net/Graeme_Birchall/id1.html">http://mysite.verizon.net/Graeme_Birchall/id1.html</A>
|
||||
</LI>
|
||||
</UL>
|
||||
|
||||
|
||||
<H3 id="item1.12">1.12) How do I submit a patch or join the development
|
||||
team?</H3>
|
||||
|
||||
|
|
@ -503,7 +503,7 @@
|
|||
|
||||
<P>There are three major areas for potential performance
|
||||
improvement:</P>
|
||||
|
||||
|
||||
<DL>
|
||||
<DT><B>Query Changes</B></DT>
|
||||
|
||||
|
|
@ -583,7 +583,7 @@
|
|||
PostgreSQL minor releases are designed to fix only common bugs
|
||||
with the least risk. The community considers <i>not</i> upgrading
|
||||
more risky that upgrading.</P>
|
||||
|
||||
|
||||
<P>Major releases (e.g. from 7.3 to 7.4) often change the internal
|
||||
format of system tables and data files. These changes are often complex,
|
||||
so we don't maintain backward compatibility for data files. A dump/reload
|
||||
|
|
@ -638,7 +638,7 @@
|
|||
|
||||
<P>There are also system tables beginning with <I>pg_</I> that describe
|
||||
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
|
||||
|
|
@ -660,7 +660,7 @@
|
|||
</PRE>
|
||||
<P>You might then want to do <I>VACUUM FULL tab</I> to reclaim the
|
||||
disk space used by the expired rows.</P>
|
||||
|
||||
|
||||
<H3 id="item4.4">4.4) What is the maximum size for a row, a
|
||||
table, and a database?</H3>
|
||||
|
||||
|
|
@ -735,7 +735,7 @@ table?</TD><TD>unlimited</TD></TR>
|
|||
|
||||
<P><SMALL>NULL</SMALL>s are stored as bitmaps, so they
|
||||
use very little space.</P>
|
||||
|
||||
|
||||
<H3 id="item4.6">4.6) Why are my queries slow? Why don't they
|
||||
use my indexes?</H3>
|
||||
|
||||
|
|
@ -760,7 +760,7 @@ table?</TD><TD>unlimited</TD></TR>
|
|||
However, <SMALL>LIMIT</SMALL> combined with <SMALL>ORDER BY</SMALL>
|
||||
often will use an index because only a small portion of the table
|
||||
is returned.</P>
|
||||
|
||||
|
||||
<P>If you believe the optimizer is incorrect in choosing a
|
||||
sequential scan, use <CODE>SET enable_seqscan TO 'off'</CODE> and
|
||||
run query again to see if an index scan is indeed faster.</P>
|
||||
|
|
@ -847,7 +847,7 @@ table?</TD><TD>unlimited</TD></TR>
|
|||
SELECT COALESCE(col1, '') || COALESCE(col2, '')
|
||||
FROM tab
|
||||
</PRE>
|
||||
|
||||
|
||||
<P>To sort by the <SMALL>NULL</SMALL> status, use the <SMALL>IS NULL</SMALL>
|
||||
and <SMALL>IS NOT NULL</SMALL> modifiers in your <SMALL>ORDER BY</SMALL> clause.
|
||||
Things that are <I>true</I> will sort higher than things that are <I>false</I>,
|
||||
|
|
@ -948,7 +948,7 @@ length</TD></TR>
|
|||
execute("INSERT INTO person (name) VALUES ('Blaise Pascal')");
|
||||
new_id = execute("SELECT currval('person_id_seq')");
|
||||
</PRE>
|
||||
|
||||
|
||||
<H3 id="item4.11.3">4.11.3) Doesn't <I>currval()</I>
|
||||
lead to a race condition with other users?</H3>
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue