database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-28 23:42:10 +03:00
Code Activity

Update FAQ.

Browse Source
This commit is contained in:
Bruce Momjian
2002-02-12 17:14:55 +00:00
parent 0ae55405de
commit d39a369912
2 changed files with 23 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
doc/src/FAQ/FAQ.html
View File

@ -14,7 +14,7 @@
alink="#0000ff">
<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
<P>Last updated: Sat Feb 2 16:46:36 EST 2002</P>
<P>Last updated: Tue Feb 12 12:14:52 EST 2002</P>
<P>Current maintainer: Bruce Momjian (<A href=
"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR>
@ -119,6 +119,9 @@
<SMALL>SERIAL</SMALL> insert?<BR>
<A href="#4.15.3">4.15.3</A>) Don't <I>currval()</I> and
<I>nextval()</I> lead to a race condition with other users?<BR>
<A href="#4.15.4">4.15.4</A>) Why aren't my sequence numbers reused
on transaction abort? Why are there gaps in the numbers of my
sequence/SERIAL column?<BR>
<A href="#4.16">4.16</A>) What is an <SMALL>OID</SMALL>? What is a
<SMALL>TID</SMALL>?<BR>
<A href="#4.17">4.17</A>) What is the meaning of some of the terms
@ -1092,6 +1095,15 @@ BYTEA bytea variable-length byte array (null-byte safe)
<P>No. Currval() returns the current value assigned by your
backend, not by all users.</P>
<H4><A name="4.15.4">4.15.4</A>) Why aren't my sequence numbers reused
on transaction abort? Why are there gaps in the numbers of my
sequence/SERIAL column?</H4>
<P>To improve concurrency, sequence values are given out to running
transactions as needed and are now <i>locked</i> until the
transaction completes. This causes gaps in numbering from aborted
transactions.
<H4><A name="4.16">4.16</A>) What is an <SMALL>OID</SMALL>? What is
a <SMALL>TID</SMALL>?</H4>