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Postgres FD Implementation
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Abuhujair Javed
Postgres FD Implementation
Commits
4f63cc6a
Commit
4f63cc6a
authored
Feb 01, 2005
by
Bruce Momjian
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Final FAQ cleanups to remove information about very old releases.
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doc/FAQ
View file @
4f63cc6a
Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Mon Jan 31 21:
35:15
EST 2005
Last updated: Mon Jan 31 21:
40:28
EST 2005
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
...
...
@@ -808,18 +808,18 @@
uncertain how a cross-database query should even behave.
contrib/dblink allows cross-database queries using function calls. Of
course, a client can make simultaneous connections to different
course, a client can
also
make simultaneous connections to different
databases and merge the results on the client side.
4.19) How do I return multiple rows or columns from a function?
I
n 7.3, you can easily return multiple rows or columns from a
function,
http://techdocs.postgresql.org/guides/SetReturningFunctions.
I
t is easy using set-returning functions,
http://techdocs.postgresql.org/guides/SetReturningFunctions.
4.20) Why can't I reliably create/drop temporary tables in PL/PgSQL
functions?
PL/PgSQL caches function
conten
ts, and an unfortunate side effect is
PL/PgSQL caches function
scrip
ts, and an unfortunate side effect is
that if a PL/PgSQL function accesses a temporary table, and that table
is later dropped and recreated, and the function called again, the
function will fail because the cached function contents still point to
...
...
@@ -838,8 +838,7 @@
possible to use a third-party encrypted transport, such as stunnel
or ssh, rather than PostgreSQL's native SSL connections.)
* Database user passwords are automatically encrypted when stored in
version 7.3. In previous versions, you must enable the option
PASSWORD_ENCRYPTION in postgresql.conf.
the system tables.
* The server can run using an encrypted file system.
_________________________________________________________________
...
...
doc/src/FAQ/FAQ.html
View file @
4f63cc6a
...
...
@@ -10,7 +10,7 @@
alink=
"#0000ff"
>
<H1>
Frequently Asked Questions (FAQ) for PostgreSQL
</H1>
<P>
Last updated: Mon Jan 31 21:
35:15
EST 2005
</P>
<P>
Last updated: Mon Jan 31 21:
40:28
EST 2005
</P>
<P>
Current maintainer: Bruce Momjian (
<A
href=
"mailto:pgman@candle.pha.pa.us"
>
pgman@candle.pha.pa.us
</A>
)
...
...
@@ -1040,25 +1040,25 @@ length</TD></TR>
uncertain how a cross-database query should even behave.
</P>
<P><I>
contrib/dblink
</I>
allows cross-database queries using
function calls. Of course, a client can make simultaneous
function calls. Of course, a client can
also
make simultaneous
connections to different databases and merge the results on the
client side.
</P>
<H4><A
name=
"4.19"
>
4.19
</A>
) How do I return multiple rows or
columns from a function?
</H4>
<P>
In 7.3, you can easily return multiple rows or columns from a
function,
<P>
It is easy using set-returning functions,
<a
href=
"http://techdocs.postgresql.org/guides/SetReturningFunctions"
>
http://techdocs.postgresql.org/guides/SetReturningFunctions
</a>
.
<H4><A
name=
"4.20"
>
4.20
</A>
) Why can't I reliably create/drop
temporary tables in PL/PgSQL functions?
</H4>
<P>
PL/PgSQL caches function contents, and an unfortunate side effect
<P>
PL/PgSQL caches function scripts, and an unfortunate side effect
is that if a PL/PgSQL function accesses a temporary table, and that
table is later dropped and recreated, and the function called
again, the function will fail because the cached function contents
still
point to the old temporary table. The solution is to use
table is later dropped and recreated, and the function called
again,
the function will fail because the cached function contents still
point to the old temporary table. The solution is to use
<SMALL>
EXECUTE
</SMALL>
for temporary table access in PL/PgSQL. This
will cause the query to be reparsed every time.
</P>
...
...
@@ -1075,8 +1075,7 @@ length</TD></TR>
encrypted transport, such as stunnel or ssh, rather than PostgreSQL's
native SSL connections.)
<LI>
Database user passwords are automatically encrypted when stored in
version 7.3. In previous versions, you must enable the option
<I>
PASSWORD_ENCRYPTION
</I>
in
<I>
postgresql.conf
</I>
.
</LI>
the system tables.
</LI>
<LI>
The server can run using an encrypted file system.
</LI>
</UL>
...
...
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