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slony1_funcs.sql
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slony1_funcs.sql
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-- ----------------------------------------------------------------------
-- slony1_funcs.sql
--
-- Declaration of replication support functions.
--
-- Copyright (c) 2003-2010, PostgreSQL Global Development Group
-- Author: Jan Wieck, Afilias USA INC.
--
--
-- ----------------------------------------------------------------------
-- **********************************************************************
-- * C functions in src/backend/slony1_base.c
-- **********************************************************************
-- ----------------------------------------------------------------------
-- FUNCTION createEvent (cluster_name, ev_type [, ev_data [...]])
--
-- Create an sl_event entry
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text)
returns bigint
as '$libdir/slony1_funcs', '_Slony_I_createEvent'
language C
called on null input;
comment on function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text) is
'FUNCTION createEvent (cluster_name, ev_type [, ev_data [...]])
Create an sl_event entry';
create or replace function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text)
returns bigint
as '$libdir/slony1_funcs', '_Slony_I_createEvent'
language C
called on null input;
comment on function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text) is
'FUNCTION createEvent (cluster_name, ev_type [, ev_data [...]])
Create an sl_event entry';
create or replace function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text)
returns bigint
as '$libdir/slony1_funcs', '_Slony_I_createEvent'
language C
called on null input;
comment on function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text) is
'FUNCTION createEvent (cluster_name, ev_type [, ev_data [...]])
Create an sl_event entry';
create or replace function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text)
returns bigint
as '$libdir/slony1_funcs', '_Slony_I_createEvent'
language C
called on null input;
comment on function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text) is
'FUNCTION createEvent (cluster_name, ev_type [, ev_data [...]])
Create an sl_event entry';
create or replace function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text, ev_data4 text)
returns bigint
as '$libdir/slony1_funcs', '_Slony_I_createEvent'
language C
called on null input;
comment on function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text, ev_data4 text) is
'FUNCTION createEvent (cluster_name, ev_type [, ev_data [...]])
Create an sl_event entry';
create or replace function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text, ev_data4 text, ev_data5 text)
returns bigint
as '$libdir/slony1_funcs', '_Slony_I_createEvent'
language C
called on null input;
comment on function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text, ev_data4 text, ev_data5 text) is
'FUNCTION createEvent (cluster_name, ev_type [, ev_data [...]])
Create an sl_event entry';
create or replace function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text, ev_data4 text, ev_data5 text, ev_data6 text)
returns bigint
as '$libdir/slony1_funcs', '_Slony_I_createEvent'
language C
called on null input;
comment on function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text, ev_data4 text, ev_data5 text, ev_data6 text) is
'FUNCTION createEvent (cluster_name, ev_type [, ev_data [...]])
Create an sl_event entry';
create or replace function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text, ev_data4 text, ev_data5 text, ev_data6 text, ev_data7 text)
returns bigint
as '$libdir/slony1_funcs', '_Slony_I_createEvent'
language C
called on null input;
comment on function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text, ev_data4 text, ev_data5 text, ev_data6 text, ev_data7 text) is
'FUNCTION createEvent (cluster_name, ev_type [, ev_data [...]])
Create an sl_event entry';
create or replace function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text, ev_data4 text, ev_data5 text, ev_data6 text, ev_data7 text, ev_data8 text)
returns bigint
as '$libdir/slony1_funcs', '_Slony_I_createEvent'
language C
called on null input;
comment on function @NAMESPACE@.createEvent (p_cluster_name name, p_event_type text, ev_data1 text, ev_data2 text, ev_data3 text, ev_data4 text, ev_data5 text, ev_data6 text, ev_data7 text, ev_data8 text) is
'FUNCTION createEvent (cluster_name, ev_type [, ev_data [...]])
Create an sl_event entry';
-- ----------------------------------------------------------------------
-- FUNCTION denyAccess ()
--
-- Trigger function to prevent modifications to a table on
-- a subscriber.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.denyAccess ()
returns trigger
as '$libdir/slony1_funcs', '_Slony_I_denyAccess'
language C
security definer;
comment on function @NAMESPACE@.denyAccess () is
'Trigger function to prevent modifications to a table on a subscriber';
grant execute on function @NAMESPACE@.denyAccess () to public;
-- ----------------------------------------------------------------------
-- FUNCTION lockedSet (cluster_name)
--
-- Trigger function to prevent modifications to a table before
-- and after a moveSet().
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.lockedSet ()
returns trigger
as '$libdir/slony1_funcs', '_Slony_I_lockedSet'
language C;
comment on function @NAMESPACE@.lockedSet () is
'Trigger function to prevent modifications to a table before and after a moveSet()';
-- ----------------------------------------------------------------------
-- FUNCTION getLocalNodeId (name)
--
--
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.getLocalNodeId (p_cluster name) returns int4
as '$libdir/slony1_funcs', '_Slony_I_getLocalNodeId'
language C
security definer;
grant execute on function @NAMESPACE@.getLocalNodeId (p_cluster name) to public;
comment on function @NAMESPACE@.getLocalNodeId (p_cluster name) is
'Returns the node ID of the node being serviced on the local database';
-- ----------------------------------------------------------------------
-- FUNCTION getModuleVersion ()
--
-- Returns the compiled in version number of the Slony-I shared
-- object.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.getModuleVersion () returns text
as '$libdir/slony1_funcs', '_Slony_I_getModuleVersion'
language C
security definer;
grant execute on function @NAMESPACE@.getModuleVersion () to public;
comment on function @NAMESPACE@.getModuleVersion () is
'Returns the compiled-in version number of the Slony-I shared object';
create or replace function @NAMESPACE@.checkmoduleversion () returns text as $$
declare
moduleversion text;
begin
select into moduleversion @NAMESPACE@.getModuleVersion();
if moduleversion <> '@MODULEVERSION@' then
raise exception 'Slonik version: @MODULEVERSION@ != Slony-I version in PG build %',
moduleversion;
end if;
return null;
end;$$ language plpgsql;
comment on function @NAMESPACE@.checkmoduleversion () is
'Inline test function that verifies that slonik request for STORE
NODE/INIT CLUSTER is being run against a conformant set of
schema/functions.';
select @NAMESPACE@.checkmoduleversion();
-----------------------------------------------------------------------
-- This function checks to see if the namespace name is valid.
--
-- Apparently pgAdminIII does different validation than Slonik, and so
-- users that set up cluster names using pgAdminIII can get in trouble in
-- that they do not get around to needing Slonik until it is too
-- late...
-----------------------------------------------------------------------
create or replace function @NAMESPACE@.check_namespace_validity () returns boolean as $$
declare
c_cluster text;
begin
c_cluster := '@CLUSTERNAME@';
if c_cluster !~ E'^[[:alpha:]_][[:alnum:]_\$]{0,62}$' then
raise exception 'Cluster name % is not a valid SQL symbol!', c_cluster;
else
raise notice 'checked validity of cluster % namespace - OK!', c_cluster;
end if;
return 't';
end
$$ language plpgsql;
select @NAMESPACE@.check_namespace_validity();
drop function @NAMESPACE@.check_namespace_validity();
-- ----------------------------------------------------------------------
-- FUNCTION logTrigger ()
--
--
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.logTrigger () returns trigger
as '$libdir/slony1_funcs', '_Slony_I_logTrigger'
language C
security definer;
comment on function @NAMESPACE@.logTrigger () is
'This is the trigger that is executed on the origin node that causes
updates to be recorded in sl_log_1/sl_log_2.';
grant execute on function @NAMESPACE@.logTrigger () to public;
-- ----------------------------------------------------------------------
-- FUNCTION terminateNodeConnections (failed_node)
--
--
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.terminateNodeConnections (p_failed_node int4) returns int4
as $$
declare
v_row record;
begin
for v_row in select nl_nodeid, nl_conncnt,
nl_backendpid from @NAMESPACE@.sl_nodelock
where nl_nodeid = p_failed_node for update
loop
perform @NAMESPACE@.killBackend(v_row.nl_backendpid, 'TERM');
delete from @NAMESPACE@.sl_nodelock
where nl_nodeid = v_row.nl_nodeid
and nl_conncnt = v_row.nl_conncnt;
end loop;
return 0;
end;
$$ language plpgsql;
comment on function @NAMESPACE@.terminateNodeConnections (p_failed_node int4) is
'terminates all backends that have registered to be from the given node';
-- ----------------------------------------------------------------------
-- FUNCTION killBackend (pid, signame)
--
--
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.killBackend (p_pid int4, p_signame text) returns int4
as '$libdir/slony1_funcs', '_Slony_I_killBackend'
language C;
comment on function @NAMESPACE@.killBackend(p_pid int4, p_signame text) is
'Send a signal to a postgres process. Requires superuser rights';
-- ----------------------------------------------------------------------
-- FUNCTION seqtrack (seqid, seqval)
--
--
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.seqtrack (p_seqid int4, p_seqval int8) returns int8
as '$libdir/slony1_funcs', '_Slony_I_seqtrack'
strict language C;
comment on function @NAMESPACE@.seqtrack(p_seqid int4, p_seqval int8) is
'Returns NULL if seqval has not changed since the last call for seqid';
-- ----------------------------------------------------------------------
-- FUNCTION slon_quote_brute(text)
--
-- Function that quotes a given string.
-- All existing quotes will be escaped.
--
-- This function will be used to quote output of internal functions.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.slon_quote_brute(p_tab_fqname text) returns text
as $$
declare
v_fqname text default '';
begin
v_fqname := '"' || replace(p_tab_fqname,'"','""') || '"';
return v_fqname;
end;
$$ language plpgsql immutable;
comment on function @NAMESPACE@.slon_quote_brute(p_tab_fqname text) is
'Brutally quote the given text';
-- ----------------------------------------------------------------------
-- FUNCTION slon_quote_input(text)
--
-- Function that quotes a given fqn. This function quotes every
-- word that isn't quoted yet. Words or groups of words that are
-- already quoted will be untouched.
--
-- This function will be used to quote user input.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.slon_quote_input(p_tab_fqname text) returns text as $$
declare
v_nsp_name text;
v_tab_name text;
v_i integer;
v_l integer;
v_pq2 integer;
begin
v_l := length(p_tab_fqname);
-- Let us search for the dot
if p_tab_fqname like '"%' then
-- if the first part of the ident starts with a double quote, search
-- for the closing double quote, skipping over double double quotes.
v_i := 2;
while v_i <= v_l loop
if substr(p_tab_fqname, v_i, 1) != '"' then
v_i := v_i + 1;
else
v_i := v_i + 1;
if substr(p_tab_fqname, v_i, 1) != '"' then
exit;
end if;
v_i := v_i + 1;
end if;
end loop;
else
-- first part of ident is not quoted, search for the dot directly
v_i := 1;
while v_i <= v_l loop
if substr(p_tab_fqname, v_i, 1) = '.' then
exit;
end if;
v_i := v_i + 1;
end loop;
end if;
-- v_i now points at the dot or behind the string.
if substr(p_tab_fqname, v_i, 1) = '.' then
-- There is a dot now, so split the ident into its namespace
-- and objname parts and make sure each is quoted
v_nsp_name := substr(p_tab_fqname, 1, v_i - 1);
v_tab_name := substr(p_tab_fqname, v_i + 1);
if v_nsp_name not like '"%' then
v_nsp_name := '"' || replace(v_nsp_name, '"', '""') ||
'"';
end if;
if v_tab_name not like '"%' then
v_tab_name := '"' || replace(v_tab_name, '"', '""') ||
'"';
end if;
return v_nsp_name || '.' || v_tab_name;
else
-- No dot ... must be just an ident without schema
if p_tab_fqname like '"%' then
return p_tab_fqname;
else
return '"' || replace(p_tab_fqname, '"', '""') || '"';
end if;
end if;
end;$$ language plpgsql immutable;
comment on function @NAMESPACE@.slon_quote_input(p_text text) is
'quote all words that aren''t quoted yet';
-- **********************************************************************
-- * PL/pgSQL functions for administrative tasks
-- **********************************************************************
-- ----------------------------------------------------------------------
-- FUNCTION slonyVersionMajor()
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.slonyVersionMajor()
returns int4
as $$
begin
return 2;
end;
$$ language plpgsql;
comment on function @NAMESPACE@.slonyVersionMajor () is
'Returns the major version number of the slony schema';
-- ----------------------------------------------------------------------
-- FUNCTION slonyVersionMinor()
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.slonyVersionMinor()
returns int4
as $$
begin
return 1;
end;
$$ language plpgsql;
comment on function @NAMESPACE@.slonyVersionMinor () is
'Returns the minor version number of the slony schema';
-- ----------------------------------------------------------------------
-- FUNCTION slonyVersionPatchlevel()
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.slonyVersionPatchlevel()
returns int4
as $$
begin
return 0;
end;
$$ language plpgsql;
comment on function @NAMESPACE@.slonyVersionPatchlevel () is
'Returns the version patch level of the slony schema';
-- ----------------------------------------------------------------------
-- FUNCTION slonyVersion()
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.slonyVersion()
returns text
as $$
begin
return @NAMESPACE@.slonyVersionMajor()::text || '.' ||
@NAMESPACE@.slonyVersionMinor()::text || '.' ||
@NAMESPACE@.slonyVersionPatchlevel()::text;
end;
$$ language plpgsql;
comment on function @NAMESPACE@.slonyVersion() is
'Returns the version number of the slony schema';
-- ----------------------------------------------------------------------
-- FUNCTION registry_set_int4(key, value);
-- FUNCTION registry_get_int4(key, default);
-- FUNCTION registry_set_text(key, value);
-- FUNCTION registry_get_text(key, default);
-- FUNCTION registry_set_timestamp(key, value);
-- FUNCTION registry_get_timestamp(key, default);
--
-- Functions for accessing sl_registry
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.registry_set_int4(p_key text, p_value int4)
returns int4 as $$
BEGIN
if p_value is null then
delete from @NAMESPACE@.sl_registry
where reg_key = p_key;
else
lock table @NAMESPACE@.sl_registry;
update @NAMESPACE@.sl_registry
set reg_int4 = p_value
where reg_key = p_key;
if not found then
insert into @NAMESPACE@.sl_registry (reg_key, reg_int4)
values (p_key, p_value);
end if;
end if;
return p_value;
END;
$$ language plpgsql;
comment on function @NAMESPACE@.registry_set_int4(p_key text, p_value int4) is
'registry_set_int4(key, value)
Set or delete a registry value';
create or replace function @NAMESPACE@.registry_get_int4(p_key text, p_default int4)
returns int4 as $$
DECLARE
v_value int4;
BEGIN
select reg_int4 into v_value from @NAMESPACE@.sl_registry
where reg_key = p_key;
if not found then
v_value = p_default;
if p_default notnull then
perform @NAMESPACE@.registry_set_int4(p_key, p_default);
end if;
else
if v_value is null then
raise exception 'Slony-I: registry key % is not an int4 value',
p_key;
end if;
end if;
return v_value;
END;
$$ language plpgsql;
comment on function @NAMESPACE@.registry_get_int4(p_key text, p_default int4) is
'registry_get_int4(key, value)
Get a registry value. If not present, set and return the default.';
create or replace function @NAMESPACE@.registry_set_text(p_key text, p_value text)
returns text as $$
BEGIN
if p_value is null then
delete from @NAMESPACE@.sl_registry
where reg_key = p_key;
else
lock table @NAMESPACE@.sl_registry;
update @NAMESPACE@.sl_registry
set reg_text = p_value
where reg_key = p_key;
if not found then
insert into @NAMESPACE@.sl_registry (reg_key, reg_text)
values (p_key, p_value);
end if;
end if;
return p_value;
END;
$$ language plpgsql;
comment on function @NAMESPACE@.registry_set_text(text, text) is
'registry_set_text(key, value)
Set or delete a registry value';
create or replace function @NAMESPACE@.registry_get_text(p_key text, p_default text)
returns text as $$
DECLARE
v_value text;
BEGIN
select reg_text into v_value from @NAMESPACE@.sl_registry
where reg_key = p_key;
if not found then
v_value = p_default;
if p_default notnull then
perform @NAMESPACE@.registry_set_text(p_key, p_default);
end if;
else
if v_value is null then
raise exception 'Slony-I: registry key % is not a text value',
p_key;
end if;
end if;
return v_value;
END;
$$ language plpgsql;
comment on function @NAMESPACE@.registry_get_text(p_key text, p_default text) is
'registry_get_text(key, value)
Get a registry value. If not present, set and return the default.';
create or replace function @NAMESPACE@.registry_set_timestamp(p_key text, p_value timestamptz)
returns timestamp as $$
BEGIN
if p_value is null then
delete from @NAMESPACE@.sl_registry
where reg_key = p_key;
else
lock table @NAMESPACE@.sl_registry;
update @NAMESPACE@.sl_registry
set reg_timestamp = p_value
where reg_key = p_key;
if not found then
insert into @NAMESPACE@.sl_registry (reg_key, reg_timestamp)
values (p_key, p_value);
end if;
end if;
return p_value;
END;
$$ language plpgsql;
comment on function @NAMESPACE@.registry_set_timestamp(p_key text, p_value timestamptz) is
'registry_set_timestamp(key, value)
Set or delete a registry value';
create or replace function @NAMESPACE@.registry_get_timestamp(p_key text, p_default timestamptz)
returns timestamp as $$
DECLARE
v_value timestamp;
BEGIN
select reg_timestamp into v_value from @NAMESPACE@.sl_registry
where reg_key = p_key;
if not found then
v_value = p_default;
if p_default notnull then
perform @NAMESPACE@.registry_set_timestamp(p_key, p_default);
end if;
else
if v_value is null then
raise exception 'Slony-I: registry key % is not an timestamp value',
p_key;
end if;
end if;
return v_value;
END;
$$ language plpgsql;
comment on function @NAMESPACE@.registry_get_timestamp(p_key text, p_default timestamptz) is
'registry_get_timestamp(key, value)
Get a registry value. If not present, set and return the default.';
-- ----------------------------------------------------------------------
-- FUNCTION cleanupNodelock ()
--
-- Remove old entries from the nodelock table
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.cleanupNodelock ()
returns int4
as $$
declare
v_row record;
begin
for v_row in select nl_nodeid, nl_conncnt, nl_backendpid
from @NAMESPACE@.sl_nodelock
for update
loop
if @NAMESPACE@.killBackend(v_row.nl_backendpid, 'NULL') < 0 then
raise notice 'Slony-I: cleanup stale sl_nodelock entry for pid=%',
v_row.nl_backendpid;
delete from @NAMESPACE@.sl_nodelock where
nl_nodeid = v_row.nl_nodeid and
nl_conncnt = v_row.nl_conncnt;
end if;
end loop;
return 0;
end;
$$ language plpgsql;
comment on function @NAMESPACE@.cleanupNodelock() is
'Clean up stale entries when restarting slon';
-- ----------------------------------------------------------------------
-- FUNCTION registerNodeConnection (nodeid)
--
-- register a node connection for a slon so that only that slon services
-- the node
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.registerNodeConnection (p_nodeid int4)
returns int4
as $$
begin
insert into @NAMESPACE@.sl_nodelock
(nl_nodeid, nl_backendpid)
values
(p_nodeid, pg_backend_pid());
return 0;
end;
$$ language plpgsql;
comment on function @NAMESPACE@.registerNodeConnection (p_nodeid int4) is
'Register (uniquely) the node connection so that only one slon can service the node';
-- ----------------------------------------------------------------------
-- FUNCTION initializeLocalNode (no_id, no_comment)
--
-- Initializes a new node.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.initializeLocalNode (p_local_node_id int4, p_comment text)
returns int4
as $$
declare
v_old_node_id int4;
v_first_log_no int4;
v_event_seq int8;
begin
-- ----
-- Grab the central configuration lock
-- ----
lock table @NAMESPACE@.sl_config_lock;
-- ----
-- Make sure this node is uninitialized or got reset
-- ----
select last_value::int4 into v_old_node_id from @NAMESPACE@.sl_local_node_id;
if v_old_node_id != -1 then
raise exception 'Slony-I: This node is already initialized';
end if;
-- ----
-- Set sl_local_node_id to the requested value and add our
-- own system to sl_node.
-- ----
perform setval('@NAMESPACE@.sl_local_node_id', p_local_node_id);
perform @NAMESPACE@.storeNode_int (p_local_node_id, p_comment);
if (pg_catalog.current_setting('max_identifier_length')::integer - pg_catalog.length('@NAMESPACE@')) < 5 then
raise notice 'Slony-I: Cluster name length [%] versus system max_identifier_length [%] ', pg_catalog.length('@NAMESPACE@'), pg_catalog.current_setting('max_identifier_length');
raise notice 'leaves narrow/no room for some Slony-I-generated objects (such as indexes).';
raise notice 'You may run into problems later!';
end if;
return p_local_node_id;
end;
$$ language plpgsql;
comment on function @NAMESPACE@.initializeLocalNode (p_local_node_id int4, p_comment text) is
'no_id - Node ID #
no_comment - Human-oriented comment
Initializes the new node, no_id';
-- ----------------------------------------------------------------------
-- FUNCTION storeNode (no_id, no_comment)
--
-- Generate the STORE_NODE event.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.storeNode (p_no_id int4, p_no_comment text)
returns bigint
as $$
begin
perform @NAMESPACE@.storeNode_int (p_no_id, p_no_comment);
return @NAMESPACE@.createEvent('_@CLUSTERNAME@', 'STORE_NODE',
p_no_id::text, p_no_comment::text);
end;
$$ language plpgsql
called on null input;
comment on function @NAMESPACE@.storeNode(p_no_id int4, p_no_comment text) is
'no_id - Node ID #
no_comment - Human-oriented comment
Generate the STORE_NODE event for node no_id';
-- ----------------------------------------------------------------------
-- FUNCTION storeNode_int (no_id, no_comment)
--
-- Process the STORE_NODE event.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.storeNode_int (p_no_id int4, p_no_comment text)
returns int4
as $$
declare
v_old_row record;
begin
-- ----
-- Grab the central configuration lock
-- ----
lock table @NAMESPACE@.sl_config_lock;
-- ----
-- Check if the node exists
-- ----
select * into v_old_row
from @NAMESPACE@.sl_node
where no_id = p_no_id
for update;
if found then
-- ----
-- Node exists, update the existing row.
-- ----
update @NAMESPACE@.sl_node
set no_comment = p_no_comment
where no_id = p_no_id;
else
-- ----
-- New node, insert the sl_node row
-- ----
insert into @NAMESPACE@.sl_node
(no_id, no_active, no_comment) values
(p_no_id, 'f', p_no_comment);
end if;
return p_no_id;
end;
$$ language plpgsql;
comment on function @NAMESPACE@.storeNode_int(p_no_id int4, p_no_comment text) is
'no_id - Node ID #
no_comment - Human-oriented comment
Internal function to process the STORE_NODE event for node no_id';
-- ----------------------------------------------------------------------
-- FUNCTION enableNode (no_id)
--
-- Generate the ENABLE_NODE event.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.enableNode (p_no_id int4)
returns bigint
as $$
declare
v_local_node_id int4;
v_node_row record;
begin
-- ----
-- Grab the central configuration lock
-- ----
lock table @NAMESPACE@.sl_config_lock;
-- ----
-- Check that we are the node to activate and that we are
-- currently disabled.
-- ----
v_local_node_id := @NAMESPACE@.getLocalNodeId('_@CLUSTERNAME@');
select * into v_node_row
from @NAMESPACE@.sl_node
where no_id = p_no_id
for update;
if not found then
raise exception 'Slony-I: node % not found', p_no_id;
end if;
if v_node_row.no_active then
raise exception 'Slony-I: node % is already active', p_no_id;
end if;
-- ----
-- Activate this node and generate the ENABLE_NODE event
-- ----
perform @NAMESPACE@.enableNode_int (p_no_id);
return @NAMESPACE@.createEvent('_@CLUSTERNAME@', 'ENABLE_NODE',
p_no_id::text);
end;
$$ language plpgsql;
comment on function @NAMESPACE@.enableNode(p_no_id int4) is
'no_id - Node ID #
Generate the ENABLE_NODE event for node no_id';
-- ----------------------------------------------------------------------
-- FUNCTION enableNode_int (no_id)
--
-- Process the ENABLE_NODE event.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.enableNode_int (p_no_id int4)
returns int4
as $$
declare
v_local_node_id int4;
v_node_row record;
v_sub_row record;
begin
-- ----
-- Grab the central configuration lock
-- ----
lock table @NAMESPACE@.sl_config_lock;
-- ----
-- Check that the node is inactive
-- ----
select * into v_node_row
from @NAMESPACE@.sl_node
where no_id = p_no_id
for update;
if not found then
raise exception 'Slony-I: node % not found', p_no_id;
end if;
if v_node_row.no_active then
return p_no_id;
end if;
-- ----
-- Activate the node and generate sl_confirm status rows for it.
-- ----
update @NAMESPACE@.sl_node
set no_active = 't'
where no_id = p_no_id;
insert into @NAMESPACE@.sl_confirm
(con_origin, con_received, con_seqno)
select no_id, p_no_id, 0 from @NAMESPACE@.sl_node
where no_id != p_no_id
and no_active;
insert into @NAMESPACE@.sl_confirm
(con_origin, con_received, con_seqno)
select p_no_id, no_id, 0 from @NAMESPACE@.sl_node
where no_id != p_no_id
and no_active;
-- ----
-- Generate ENABLE_SUBSCRIPTION events for all sets that
-- origin here and are subscribed by the just enabled node.
-- ----
v_local_node_id := @NAMESPACE@.getLocalNodeId('_@CLUSTERNAME@');
for v_sub_row in select SUB.sub_set, SUB.sub_provider from
@NAMESPACE@.sl_set S,
@NAMESPACE@.sl_subscribe SUB
where S.set_origin = v_local_node_id
and S.set_id = SUB.sub_set
and SUB.sub_receiver = p_no_id
for update of S
loop
perform @NAMESPACE@.enableSubscription (v_sub_row.sub_set,
v_sub_row.sub_provider, p_no_id);
end loop;
return p_no_id;
end;
$$ language plpgsql;
comment on function @NAMESPACE@.enableNode_int(p_no_id int4) is
'no_id - Node ID #
Internal function to process the ENABLE_NODE event for node no_id';
-- ----------------------------------------------------------------------
-- FUNCTION disableNode (no_id)
--
-- Generate the DISABLE_NODE event.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.disableNode (p_no_id int4)
returns bigint
as $$
begin
-- **** TODO ****
raise exception 'Slony-I: disableNode() not implemented';
end;
$$ language plpgsql;
comment on function @NAMESPACE@.disableNode(p_no_id int4) is
'generate DISABLE_NODE event for node no_id';
-- ----------------------------------------------------------------------
-- FUNCTION disableNode_int (no_id)
--
-- Process the DISABLE_NODE event.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.disableNode_int (p_no_id int4)
returns int4
as $$
begin
-- **** TODO ****
raise exception 'Slony-I: disableNode_int() not implemented';
end;
$$ language plpgsql;
comment on function @NAMESPACE@.disableNode(p_no_id int4) is
'process DISABLE_NODE event for node no_id
NOTE: This is not yet implemented!';
-- ----------------------------------------------------------------------
-- FUNCTION dropNode (no_id)
--
-- Generate the DROP_NODE event.
-- ----------------------------------------------------------------------
create or replace function @NAMESPACE@.dropNode (p_no_id int4)
returns bigint
as $$
declare
v_node_row record;
begin
-- ----
-- Grab the central configuration lock
-- ----
lock table @NAMESPACE@.sl_config_lock;
-- ----
-- Check that this got called on a different node
-- ----
if p_no_id = @NAMESPACE@.getLocalNodeId('_@CLUSTERNAME@') then
raise exception 'Slony-I: DROP_NODE cannot initiate on the dropped node';
end if;
select * into v_node_row from @NAMESPACE@.sl_node
where no_id = p_no_id
for update;
if not found then
raise exception 'Slony-I: unknown node ID %', p_no_id;
end if;
-- ----
-- Make sure we do not break other nodes subscriptions with this
-- ----
if exists (select true from @NAMESPACE@.sl_subscribe
where sub_provider = p_no_id)
then
raise exception 'Slony-I: Node % is still configured as a data provider',
p_no_id;
end if;
-- ----
-- Make sure no set originates there any more
-- ----
if exists (select true from @NAMESPACE@.sl_set
where set_origin = p_no_id)
then
raise exception 'Slony-I: Node % is still origin of one or more sets',
p_no_id;
end if;