/usr/share/doc/slony1-2-doc/adminguide/function.check-unconfirmed-log.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>       check_unconfirmed_log()
      </TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REV="MADE"
HREF="mailto:slony1-general@lists.slony.info"><LINK
REL="HOME"
TITLE="Slony-I 2.2.5 Documentation"
HREF="index.html"><LINK
REL="UP"
TITLE="Schema schemadoc"
HREF="schema.html"><LINK
REL="PREVIOUS"
TITLE="       check_table_field_exists(p_field text, p_table text, p_namespace text)
      "
HREF="function.check-table-field-exists-p-field-text-p-table-text-p-namespace-text.html"><LINK
REL="NEXT"
TITLE="       checkmoduleversion()
      "
HREF="function.checkmoduleversion.html"><LINK
REL="STYLESHEET"
TYPE="text/css"
HREF="stylesheet.css"><META
HTTP-EQUIV="Content-Type"
CONTENT="text/html; charset=ISO-8859-1"></HEAD
><BODY
CLASS="SECTION"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="5"
ALIGN="center"
VALIGN="bottom"
><SPAN
CLASS="PRODUCTNAME"
>Slony-I</SPAN
> 2.2.5 Documentation</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
HREF="function.check-table-field-exists-p-field-text-p-table-text-p-namespace-text.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
HREF="schema.html"
>Fast Backward</A
></TD
><TD
WIDTH="60%"
ALIGN="center"
VALIGN="bottom"
>Chapter 8. Schema schemadoc</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="top"
><A
HREF="schema.html"
>Fast Forward</A
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="top"
><A
HREF="function.checkmoduleversion.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECTION"
><H1
CLASS="SECTION"
><A
NAME="FUNCTION.CHECK-UNCONFIRMED-LOG"
>8.32. check_unconfirmed_log()</A
></H1
><P
>       <P
><B
>Function Properties</B
></P
><P
><B
>Language: </B
>PLPGSQL</P
><P
><B
>Return Type: </B
>boolean</P
>
 
       
        </P><PRE
CLASS="PROGRAMLISTING"
>declare
	v_rc		bool = false;
	v_error		bool = false;
	v_origin	integer;
	v_allconf	bigint;
	v_allsnap	txid_snapshot;
	v_count		bigint;
begin
	--
	-- Loop over all nodes that are the origin of at least one set
	--
	for v_origin in select distinct set_origin as no_id
			from sl_set loop
		--
		-- Per origin determine which is the highest event seqno
		-- that is confirmed by all subscribers to any of the
		-- origins sets.
		--
		select into v_allconf min(max_seqno) from (
				select con_received, max(con_seqno) as max_seqno
					from sl_confirm
					where con_origin = v_origin
					and con_received in (
						select distinct sub_receiver
							from sl_set as SET,
								sl_subscribe as SUB
							where SET.set_id = SUB.sub_set
							and SET.set_origin = v_origin
						)
					group by con_received
			) as maxconfirmed;
		if not found then
			raise NOTICE 'check_unconfirmed_log(): cannot determine highest ev_seqno for node % confirmed by all subscribers', v_origin;
			v_error = true;
			continue;
		end if;

		--
		-- Get the txid snapshot that corresponds with that event
		--
		select into v_allsnap ev_snapshot
			from sl_event
			where ev_origin = v_origin
			and ev_seqno = v_allconf;
		if not found then
			raise NOTICE 'check_unconfirmed_log(): cannot find event %,% in sl_event', v_origin, v_allconf;
			v_error = true;
			continue;
		end if;

		--
		-- Count the number of log rows that appeard after that event.
		--
		select into v_count count(*) from (
			select 1 from sl_log_1
				where log_origin = v_origin
				and log_txid &gt;= &quot;pg_catalog&quot;.txid_snapshot_xmax(v_allsnap)
			union all
			select 1 from sl_log_1
				where log_origin = v_origin
				and log_txid in (
					select * from &quot;pg_catalog&quot;.txid_snapshot_xip(v_allsnap)
				)
			union all
			select 1 from sl_log_2
				where log_origin = v_origin
				and log_txid &gt;= &quot;pg_catalog&quot;.txid_snapshot_xmax(v_allsnap)
			union all
			select 1 from sl_log_2
				where log_origin = v_origin
				and log_txid in (
					select * from &quot;pg_catalog&quot;.txid_snapshot_xip(v_allsnap)
				)
		) as cnt;

		if v_count &gt; 0 then
			raise NOTICE 'check_unconfirmed_log(): origin % has % log rows that have not propagated to all subscribers yet', v_origin, v_count;
			v_rc = true;
		end if;
	end loop;

	if v_error then
		raise EXCEPTION 'check_unconfirmed_log(): aborting due to previous inconsistency';
	end if;

	return v_rc;
end;</PRE
><P>
      </P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="function.check-table-field-exists-p-field-text-p-table-text-p-namespace-text.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="function.checkmoduleversion.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>check_table_field_exists(p_field text, p_table text, p_namespace text)</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="schema.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>checkmoduleversion()</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>
slony1-2-doc 2.2.5-2 / usr / share / doc / slony1-2-doc / adminguide / function.check-unconfirmed-log.html
