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>1.4. Current Limitations</A
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><P
> <SPAN
CLASS="PRODUCTNAME"
>Slony-I</SPAN
> does not automatically replicate
<P
></P
></P><UL
><LI
><P
>Changes to large objects (BLOBS)</P
></LI
><LI
><P
>Changes made by DDL commands</P
></LI
><LI
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>Changes to users and roles</P
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>Changes made by the TRUNCATE command,
though this might change in a future version of <SPAN
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> The main reason for these limitations is that <SPAN
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>Slony-I</SPAN
>
collects updates using triggers, and neither schema changes nor large
object operations are captured by triggers</P
><P
>There is a capability for <SPAN
CLASS="PRODUCTNAME"
>Slony-I</SPAN
> to propagate notably DDL changes
if you submit them as scripts via the <SPAN
CLASS="APPLICATION"
>slonik</SPAN
> <A
HREF="stmtddlscript.html"
>SLONIK EXECUTE SCRIPT</A
> operation. That is not handled
<SPAN
CLASS="QUOTE"
>"automatically;"</SPAN
> you, as a database administrator, will
have to construct an SQL DDL script and submit it, via <A
HREF="stmtddlscript.html"
>SLONIK EXECUTE SCRIPT</A
>.</P
><P
>If you have these sorts of requirements, it may be worth
exploring the use of <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> 8.X <ACRONYM
CLASS="ACRONYM"
>PITR</ACRONYM
> (Point In
Time Recovery), where <ACRONYM
CLASS="ACRONYM"
>WAL</ACRONYM
> logs are replicated to
remote</P
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