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--
-- PLPGSQL
--
-- Scenario:
--
-- A building with a modern TP cable installation where any
-- of the wall connectors can be used to plug in phones,
-- ethernet interfaces or local office hubs. The backside
-- of the wall connectors is wired to one of several patch-
-- fields in the building.
--
-- In the patchfields, there are hubs and all the slots
-- representing the wall connectors. In addition there are
-- slots that can represent a phone line from the central
-- phone system.
--
-- Triggers ensure consistency of the patching information.
--
-- Functions are used to build up powerful views that let
-- you look behind the wall when looking at a patchfield
-- or into a room.
--
create table Room (
roomno char(8),
comment text
);
create unique index Room_rno on Room using btree (roomno bpchar_ops);
create table WSlot (
slotname char(20),
roomno char(8),
slotlink char(20),
backlink char(20)
);
create unique index WSlot_name on WSlot using btree (slotname bpchar_ops);
create table PField (
name text,
comment text
);
create unique index PField_name on PField using btree (name text_ops);
create table PSlot (
slotname char(20),
pfname text,
slotlink char(20),
backlink char(20)
);
create unique index PSlot_name on PSlot using btree (slotname bpchar_ops);
create table PLine (
slotname char(20),
phonenumber char(20),
comment text,
backlink char(20)
);
create unique index PLine_name on PLine using btree (slotname bpchar_ops);
create table Hub (
name char(14),
comment text,
nslots integer
);
create unique index Hub_name on Hub using btree (name bpchar_ops);
create table HSlot (
slotname char(20),
hubname char(14),
slotno integer,
slotlink char(20)
);
create unique index HSlot_name on HSlot using btree (slotname bpchar_ops);
create index HSlot_hubname on HSlot using btree (hubname bpchar_ops);
create table System (
name text,
comment text
);
create unique index System_name on System using btree (name text_ops);
create table IFace (
slotname char(20),
sysname text,
ifname text,
slotlink char(20)
);
create unique index IFace_name on IFace using btree (slotname bpchar_ops);
create table PHone (
slotname char(20),
comment text,
slotlink char(20)
);
create unique index PHone_name on PHone using btree (slotname bpchar_ops);
-- ************************************************************
-- *
-- * Trigger procedures and functions for the patchfield
-- * test of PL/pgSQL
-- *
-- ************************************************************
-- ************************************************************
-- * AFTER UPDATE on Room
-- * - If room no changes let wall slots follow
-- ************************************************************
create function tg_room_au() returns trigger as '
begin
if new.roomno != old.roomno then
update WSlot set roomno = new.roomno where roomno = old.roomno;
end if;
return new;
end;
' language plpgsql;
create trigger tg_room_au after update
on Room for each row execute procedure tg_room_au();
-- ************************************************************
-- * AFTER DELETE on Room
-- * - delete wall slots in this room
-- ************************************************************
create function tg_room_ad() returns trigger as '
begin
delete from WSlot where roomno = old.roomno;
return old;
end;
' language plpgsql;
create trigger tg_room_ad after delete
on Room for each row execute procedure tg_room_ad();
-- ************************************************************
-- * BEFORE INSERT or UPDATE on WSlot
-- * - Check that room exists
-- ************************************************************
create function tg_wslot_biu() returns trigger as $$
begin
if count(*) = 0 from Room where roomno = new.roomno then
raise exception 'Room % does not exist', new.roomno;
end if;
return new;
end;
$$ language plpgsql;
create trigger tg_wslot_biu before insert or update
on WSlot for each row execute procedure tg_wslot_biu();
-- ************************************************************
-- * AFTER UPDATE on PField
-- * - Let PSlots of this field follow
-- ************************************************************
create function tg_pfield_au() returns trigger as '
begin
if new.name != old.name then
update PSlot set pfname = new.name where pfname = old.name;
end if;
return new;
end;
' language plpgsql;
create trigger tg_pfield_au after update
on PField for each row execute procedure tg_pfield_au();
-- ************************************************************
-- * AFTER DELETE on PField
-- * - Remove all slots of this patchfield
-- ************************************************************
create function tg_pfield_ad() returns trigger as '
begin
delete from PSlot where pfname = old.name;
return old;
end;
' language plpgsql;
create trigger tg_pfield_ad after delete
on PField for each row execute procedure tg_pfield_ad();
-- ************************************************************
-- * BEFORE INSERT or UPDATE on PSlot
-- * - Ensure that our patchfield does exist
-- ************************************************************
create function tg_pslot_biu() returns trigger as $proc$
declare
pfrec record;
ps alias for new;
begin
select into pfrec * from PField where name = ps.pfname;
if not found then
raise exception $$Patchfield "%" does not exist$$, ps.pfname;
end if;
return ps;
end;
$proc$ language plpgsql;
create trigger tg_pslot_biu before insert or update
on PSlot for each row execute procedure tg_pslot_biu();
-- ************************************************************
-- * AFTER UPDATE on System
-- * - If system name changes let interfaces follow
-- ************************************************************
create function tg_system_au() returns trigger as '
begin
if new.name != old.name then
update IFace set sysname = new.name where sysname = old.name;
end if;
return new;
end;
' language plpgsql;
create trigger tg_system_au after update
on System for each row execute procedure tg_system_au();
-- ************************************************************
-- * BEFORE INSERT or UPDATE on IFace
-- * - set the slotname to IF.sysname.ifname
-- ************************************************************
create function tg_iface_biu() returns trigger as $$
declare
sname text;
sysrec record;
begin
select into sysrec * from system where name = new.sysname;
if not found then
raise exception $q$system "%" does not exist$q$, new.sysname;
end if;
sname := 'IF.' || new.sysname;
sname := sname || '.';
sname := sname || new.ifname;
if length(sname) > 20 then
raise exception 'IFace slotname "%" too long (20 char max)', sname;
end if;
new.slotname := sname;
return new;
end;
$$ language plpgsql;
create trigger tg_iface_biu before insert or update
on IFace for each row execute procedure tg_iface_biu();
-- ************************************************************
-- * AFTER INSERT or UPDATE or DELETE on Hub
-- * - insert/delete/rename slots as required
-- ************************************************************
create function tg_hub_a() returns trigger as '
declare
hname text;
dummy integer;
begin
if tg_op = ''INSERT'' then
dummy := tg_hub_adjustslots(new.name, 0, new.nslots);
return new;
end if;
if tg_op = ''UPDATE'' then
if new.name != old.name then
update HSlot set hubname = new.name where hubname = old.name;
end if;
dummy := tg_hub_adjustslots(new.name, old.nslots, new.nslots);
return new;
end if;
if tg_op = ''DELETE'' then
dummy := tg_hub_adjustslots(old.name, old.nslots, 0);
return old;
end if;
end;
' language plpgsql;
create trigger tg_hub_a after insert or update or delete
on Hub for each row execute procedure tg_hub_a();
-- ************************************************************
-- * Support function to add/remove slots of Hub
-- ************************************************************
create function tg_hub_adjustslots(hname bpchar,
oldnslots integer,
newnslots integer)
returns integer as '
begin
if newnslots = oldnslots then
return 0;
end if;
if newnslots < oldnslots then
delete from HSlot where hubname = hname and slotno > newnslots;
return 0;
end if;
for i in oldnslots + 1 .. newnslots loop
insert into HSlot (slotname, hubname, slotno, slotlink)
values (''HS.dummy'', hname, i, '''');
end loop;
return 0;
end
' language plpgsql;
-- Test comments
COMMENT ON FUNCTION tg_hub_adjustslots_wrong(bpchar, integer, integer) IS 'function with args';
ERROR: function tg_hub_adjustslots_wrong(character, integer, integer) does not exist
COMMENT ON FUNCTION tg_hub_adjustslots(bpchar, integer, integer) IS 'function with args';
COMMENT ON FUNCTION tg_hub_adjustslots(bpchar, integer, integer) IS NULL;
-- ************************************************************
-- * BEFORE INSERT or UPDATE on HSlot
-- * - prevent from manual manipulation
-- * - set the slotname to HS.hubname.slotno
-- ************************************************************
create function tg_hslot_biu() returns trigger as '
declare
sname text;
xname HSlot.slotname%TYPE;
hubrec record;
begin
select into hubrec * from Hub where name = new.hubname;
if not found then
raise exception ''no manual manipulation of HSlot'';
end if;
if new.slotno < 1 or new.slotno > hubrec.nslots then
raise exception ''no manual manipulation of HSlot'';
end if;
if tg_op = ''UPDATE'' and new.hubname != old.hubname then
if count(*) > 0 from Hub where name = old.hubname then
raise exception ''no manual manipulation of HSlot'';
end if;
end if;
sname := ''HS.'' || trim(new.hubname);
sname := sname || ''.'';
sname := sname || new.slotno::text;
if length(sname) > 20 then
raise exception ''HSlot slotname "%" too long (20 char max)'', sname;
end if;
new.slotname := sname;
return new;
end;
' language plpgsql;
create trigger tg_hslot_biu before insert or update
on HSlot for each row execute procedure tg_hslot_biu();
-- ************************************************************
-- * BEFORE DELETE on HSlot
-- * - prevent from manual manipulation
-- ************************************************************
create function tg_hslot_bd() returns trigger as '
declare
hubrec record;
begin
select into hubrec * from Hub where name = old.hubname;
if not found then
return old;
end if;
if old.slotno > hubrec.nslots then
return old;
end if;
raise exception ''no manual manipulation of HSlot'';
end;
' language plpgsql;
create trigger tg_hslot_bd before delete
on HSlot for each row execute procedure tg_hslot_bd();
-- ************************************************************
-- * BEFORE INSERT on all slots
-- * - Check name prefix
-- ************************************************************
create function tg_chkslotname() returns trigger as '
begin
if substr(new.slotname, 1, 2) != tg_argv[0] then
raise exception ''slotname must begin with %'', tg_argv[0];
end if;
return new;
end;
' language plpgsql;
create trigger tg_chkslotname before insert
on PSlot for each row execute procedure tg_chkslotname('PS');
create trigger tg_chkslotname before insert
on WSlot for each row execute procedure tg_chkslotname('WS');
create trigger tg_chkslotname before insert
on PLine for each row execute procedure tg_chkslotname('PL');
create trigger tg_chkslotname before insert
on IFace for each row execute procedure tg_chkslotname('IF');
create trigger tg_chkslotname before insert
on PHone for each row execute procedure tg_chkslotname('PH');
-- ************************************************************
-- * BEFORE INSERT or UPDATE on all slots with slotlink
-- * - Set slotlink to empty string if NULL value given
-- ************************************************************
create function tg_chkslotlink() returns trigger as '
begin
if new.slotlink isnull then
new.slotlink := '''';
end if;
return new;
end;
' language plpgsql;
create trigger tg_chkslotlink before insert or update
on PSlot for each row execute procedure tg_chkslotlink();
create trigger tg_chkslotlink before insert or update
on WSlot for each row execute procedure tg_chkslotlink();
create trigger tg_chkslotlink before insert or update
on IFace for each row execute procedure tg_chkslotlink();
create trigger tg_chkslotlink before insert or update
on HSlot for each row execute procedure tg_chkslotlink();
create trigger tg_chkslotlink before insert or update
on PHone for each row execute procedure tg_chkslotlink();
-- ************************************************************
-- * BEFORE INSERT or UPDATE on all slots with backlink
-- * - Set backlink to empty string if NULL value given
-- ************************************************************
create function tg_chkbacklink() returns trigger as '
begin
if new.backlink isnull then
new.backlink := '''';
end if;
return new;
end;
' language plpgsql;
create trigger tg_chkbacklink before insert or update
on PSlot for each row execute procedure tg_chkbacklink();
create trigger tg_chkbacklink before insert or update
on WSlot for each row execute procedure tg_chkbacklink();
create trigger tg_chkbacklink before insert or update
on PLine for each row execute procedure tg_chkbacklink();
-- ************************************************************
-- * BEFORE UPDATE on PSlot
-- * - do delete/insert instead of update if name changes
-- ************************************************************
create function tg_pslot_bu() returns trigger as '
begin
if new.slotname != old.slotname then
delete from PSlot where slotname = old.slotname;
insert into PSlot (
slotname,
pfname,
slotlink,
backlink
) values (
new.slotname,
new.pfname,
new.slotlink,
new.backlink
);
return null;
end if;
return new;
end;
' language plpgsql;
create trigger tg_pslot_bu before update
on PSlot for each row execute procedure tg_pslot_bu();
-- ************************************************************
-- * BEFORE UPDATE on WSlot
-- * - do delete/insert instead of update if name changes
-- ************************************************************
create function tg_wslot_bu() returns trigger as '
begin
if new.slotname != old.slotname then
delete from WSlot where slotname = old.slotname;
insert into WSlot (
slotname,
roomno,
slotlink,
backlink
) values (
new.slotname,
new.roomno,
new.slotlink,
new.backlink
);
return null;
end if;
return new;
end;
' language plpgsql;
create trigger tg_wslot_bu before update
on WSlot for each row execute procedure tg_Wslot_bu();
-- ************************************************************
-- * BEFORE UPDATE on PLine
-- * - do delete/insert instead of update if name changes
-- ************************************************************
create function tg_pline_bu() returns trigger as '
begin
if new.slotname != old.slotname then
delete from PLine where slotname = old.slotname;
insert into PLine (
slotname,
phonenumber,
comment,
backlink
) values (
new.slotname,
new.phonenumber,
new.comment,
new.backlink
);
return null;
end if;
return new;
end;
' language plpgsql;
create trigger tg_pline_bu before update
on PLine for each row execute procedure tg_pline_bu();
-- ************************************************************
-- * BEFORE UPDATE on IFace
-- * - do delete/insert instead of update if name changes
-- ************************************************************
create function tg_iface_bu() returns trigger as '
begin
if new.slotname != old.slotname then
delete from IFace where slotname = old.slotname;
insert into IFace (
slotname,
sysname,
ifname,
slotlink
) values (
new.slotname,
new.sysname,
new.ifname,
new.slotlink
);
return null;
end if;
return new;
end;
' language plpgsql;
create trigger tg_iface_bu before update
on IFace for each row execute procedure tg_iface_bu();
-- ************************************************************
-- * BEFORE UPDATE on HSlot
-- * - do delete/insert instead of update if name changes
-- ************************************************************
create function tg_hslot_bu() returns trigger as '
begin
if new.slotname != old.slotname or new.hubname != old.hubname then
delete from HSlot where slotname = old.slotname;
insert into HSlot (
slotname,
hubname,
slotno,
slotlink
) values (
new.slotname,
new.hubname,
new.slotno,
new.slotlink
);
return null;
end if;
return new;
end;
' language plpgsql;
create trigger tg_hslot_bu before update
on HSlot for each row execute procedure tg_hslot_bu();
-- ************************************************************
-- * BEFORE UPDATE on PHone
-- * - do delete/insert instead of update if name changes
-- ************************************************************
create function tg_phone_bu() returns trigger as '
begin
if new.slotname != old.slotname then
delete from PHone where slotname = old.slotname;
insert into PHone (
slotname,
comment,
slotlink
) values (
new.slotname,
new.comment,
new.slotlink
);
return null;
end if;
return new;
end;
' language plpgsql;
create trigger tg_phone_bu before update
on PHone for each row execute procedure tg_phone_bu();
-- ************************************************************
-- * AFTER INSERT or UPDATE or DELETE on slot with backlink
-- * - Ensure that the opponent correctly points back to us
-- ************************************************************
create function tg_backlink_a() returns trigger as '
declare
dummy integer;
begin
if tg_op = ''INSERT'' then
if new.backlink != '''' then
dummy := tg_backlink_set(new.backlink, new.slotname);
end if;
return new;
end if;
if tg_op = ''UPDATE'' then
if new.backlink != old.backlink then
if old.backlink != '''' then
dummy := tg_backlink_unset(old.backlink, old.slotname);
end if;
if new.backlink != '''' then
dummy := tg_backlink_set(new.backlink, new.slotname);
end if;
else
if new.slotname != old.slotname and new.backlink != '''' then
dummy := tg_slotlink_set(new.backlink, new.slotname);
end if;
end if;
return new;
end if;
if tg_op = ''DELETE'' then
if old.backlink != '''' then
dummy := tg_backlink_unset(old.backlink, old.slotname);
end if;
return old;
end if;
end;
' language plpgsql;
create trigger tg_backlink_a after insert or update or delete
on PSlot for each row execute procedure tg_backlink_a('PS');
create trigger tg_backlink_a after insert or update or delete
on WSlot for each row execute procedure tg_backlink_a('WS');
create trigger tg_backlink_a after insert or update or delete
on PLine for each row execute procedure tg_backlink_a('PL');
-- ************************************************************
-- * Support function to set the opponents backlink field
-- * if it does not already point to the requested slot
-- ************************************************************
create function tg_backlink_set(myname bpchar, blname bpchar)
returns integer as '
declare
mytype char(2);
link char(4);
rec record;
begin
mytype := substr(myname, 1, 2);
link := mytype || substr(blname, 1, 2);
if link = ''PLPL'' then
raise exception
''backlink between two phone lines does not make sense'';
end if;
if link in (''PLWS'', ''WSPL'') then
raise exception
''direct link of phone line to wall slot not permitted'';
end if;
if mytype = ''PS'' then
select into rec * from PSlot where slotname = myname;
if not found then
raise exception ''% does not exist'', myname;
end if;
if rec.backlink != blname then
update PSlot set backlink = blname where slotname = myname;
end if;
return 0;
end if;
if mytype = ''WS'' then
select into rec * from WSlot where slotname = myname;
if not found then
raise exception ''% does not exist'', myname;
end if;
if rec.backlink != blname then
update WSlot set backlink = blname where slotname = myname;
end if;
return 0;
end if;
if mytype = ''PL'' then
select into rec * from PLine where slotname = myname;
if not found then
raise exception ''% does not exist'', myname;
end if;
if rec.backlink != blname then
update PLine set backlink = blname where slotname = myname;
end if;
return 0;
end if;
raise exception ''illegal backlink beginning with %'', mytype;
end;
' language plpgsql;
-- ************************************************************
-- * Support function to clear out the backlink field if
-- * it still points to specific slot
-- ************************************************************
create function tg_backlink_unset(bpchar, bpchar)
returns integer as '
declare
myname alias for $1;
blname alias for $2;
mytype char(2);
rec record;
begin
mytype := substr(myname, 1, 2);
if mytype = ''PS'' then
select into rec * from PSlot where slotname = myname;
if not found then
return 0;
end if;
if rec.backlink = blname then
update PSlot set backlink = '''' where slotname = myname;
end if;
return 0;
end if;
if mytype = ''WS'' then
select into rec * from WSlot where slotname = myname;
if not found then
return 0;
end if;
if rec.backlink = blname then
update WSlot set backlink = '''' where slotname = myname;
end if;
return 0;
end if;
if mytype = ''PL'' then
select into rec * from PLine where slotname = myname;
if not found then
return 0;
end if;
if rec.backlink = blname then
update PLine set backlink = '''' where slotname = myname;
end if;
return 0;
end if;
end
' language plpgsql;
-- ************************************************************
-- * AFTER INSERT or UPDATE or DELETE on slot with slotlink
-- * - Ensure that the opponent correctly points back to us
-- ************************************************************
create function tg_slotlink_a() returns trigger as '
declare
dummy integer;
begin
if tg_op = ''INSERT'' then
if new.slotlink != '''' then
dummy := tg_slotlink_set(new.slotlink, new.slotname);
end if;
return new;
end if;
if tg_op = ''UPDATE'' then
if new.slotlink != old.slotlink then
if old.slotlink != '''' then
dummy := tg_slotlink_unset(old.slotlink, old.slotname);
end if;
if new.slotlink != '''' then
dummy := tg_slotlink_set(new.slotlink, new.slotname);
end if;
else
if new.slotname != old.slotname and new.slotlink != '''' then
dummy := tg_slotlink_set(new.slotlink, new.slotname);
end if;
end if;
return new;
end if;
if tg_op = ''DELETE'' then
if old.slotlink != '''' then
dummy := tg_slotlink_unset(old.slotlink, old.slotname);
end if;
return old;
end if;
end;
' language plpgsql;
create trigger tg_slotlink_a after insert or update or delete
on PSlot for each row execute procedure tg_slotlink_a('PS');
create trigger tg_slotlink_a after insert or update or delete
on WSlot for each row execute procedure tg_slotlink_a('WS');
create trigger tg_slotlink_a after insert or update or delete
on IFace for each row execute procedure tg_slotlink_a('IF');
create trigger tg_slotlink_a after insert or update or delete
on HSlot for each row execute procedure tg_slotlink_a('HS');
create trigger tg_slotlink_a after insert or update or delete
on PHone for each row execute procedure tg_slotlink_a('PH');
-- ************************************************************
-- * Support function to set the opponents slotlink field
-- * if it does not already point to the requested slot
-- ************************************************************
create function tg_slotlink_set(bpchar, bpchar)
returns integer as '
declare
myname alias for $1;
blname alias for $2;
mytype char(2);
link char(4);
rec record;
begin
mytype := substr(myname, 1, 2);
link := mytype || substr(blname, 1, 2);
if link = ''PHPH'' then
raise exception
''slotlink between two phones does not make sense'';
end if;
if link in (''PHHS'', ''HSPH'') then
raise exception
''link of phone to hub does not make sense'';
end if;
if link in (''PHIF'', ''IFPH'') then
raise exception
''link of phone to hub does not make sense'';
end if;
if link in (''PSWS'', ''WSPS'') then
raise exception
''slotlink from patchslot to wallslot not permitted'';
end if;
if mytype = ''PS'' then
select into rec * from PSlot where slotname = myname;
if not found then
raise exception ''% does not exist'', myname;
end if;
if rec.slotlink != blname then
update PSlot set slotlink = blname where slotname = myname;
end if;
return 0;
end if;
if mytype = ''WS'' then
select into rec * from WSlot where slotname = myname;
if not found then
raise exception ''% does not exist'', myname;
end if;
if rec.slotlink != blname then
update WSlot set slotlink = blname where slotname = myname;
end if;
return 0;
end if;
if mytype = ''IF'' then
select into rec * from IFace where slotname = myname;
if not found then
raise exception ''% does not exist'', myname;
end if;
if rec.slotlink != blname then
update IFace set slotlink = blname where slotname = myname;
end if;
return 0;
end if;
if mytype = ''HS'' then
select into rec * from HSlot where slotname = myname;
if not found then
raise exception ''% does not exist'', myname;
end if;
if rec.slotlink != blname then
update HSlot set slotlink = blname where slotname = myname;
end if;
return 0;
end if;
if mytype = ''PH'' then
select into rec * from PHone where slotname = myname;
if not found then
raise exception ''% does not exist'', myname;
end if;
if rec.slotlink != blname then
update PHone set slotlink = blname where slotname = myname;
end if;
return 0;
end if;
raise exception ''illegal slotlink beginning with %'', mytype;
end;
' language plpgsql;
-- ************************************************************
-- * Support function to clear out the slotlink field if
-- * it still points to specific slot
-- ************************************************************
create function tg_slotlink_unset(bpchar, bpchar)
returns integer as '
declare
myname alias for $1;
blname alias for $2;
mytype char(2);
rec record;
begin
mytype := substr(myname, 1, 2);
if mytype = ''PS'' then
select into rec * from PSlot where slotname = myname;
if not found then
return 0;
end if;
if rec.slotlink = blname then
update PSlot set slotlink = '''' where slotname = myname;
end if;
return 0;
end if;
if mytype = ''WS'' then
select into rec * from WSlot where slotname = myname;
if not found then
return 0;
end if;
if rec.slotlink = blname then
update WSlot set slotlink = '''' where slotname = myname;
end if;
return 0;
end if;
if mytype = ''IF'' then
select into rec * from IFace where slotname = myname;
if not found then
return 0;
end if;
if rec.slotlink = blname then
update IFace set slotlink = '''' where slotname = myname;
end if;
return 0;
end if;
if mytype = ''HS'' then
select into rec * from HSlot where slotname = myname;
if not found then
return 0;
end if;
if rec.slotlink = blname then
update HSlot set slotlink = '''' where slotname = myname;
end if;
return 0;
end if;
if mytype = ''PH'' then
select into rec * from PHone where slotname = myname;
if not found then
return 0;
end if;
if rec.slotlink = blname then
update PHone set slotlink = '''' where slotname = myname;
end if;
return 0;
end if;
end;
' language plpgsql;
-- ************************************************************
-- * Describe the backside of a patchfield slot
-- ************************************************************
create function pslot_backlink_view(bpchar)
returns text as '
<<outer>>
declare
rec record;
bltype char(2);
retval text;
begin
select into rec * from PSlot where slotname = $1;
if not found then
return '''';
end if;
if rec.backlink = '''' then
return ''-'';
end if;
bltype := substr(rec.backlink, 1, 2);
if bltype = ''PL'' then
declare
rec record;
begin
select into rec * from PLine where slotname = "outer".rec.backlink;
retval := ''Phone line '' || trim(rec.phonenumber);
if rec.comment != '''' then
retval := retval || '' ('';
retval := retval || rec.comment;
retval := retval || '')'';
end if;
return retval;
end;
end if;
if bltype = ''WS'' then
select into rec * from WSlot where slotname = rec.backlink;
retval := trim(rec.slotname) || '' in room '';
retval := retval || trim(rec.roomno);
retval := retval || '' -> '';
return retval || wslot_slotlink_view(rec.slotname);
end if;
return rec.backlink;
end;
' language plpgsql;
-- ************************************************************
-- * Describe the front of a patchfield slot
-- ************************************************************
create function pslot_slotlink_view(bpchar)
returns text as '
declare
psrec record;
sltype char(2);
retval text;
begin
select into psrec * from PSlot where slotname = $1;
if not found then
return '''';
end if;
if psrec.slotlink = '''' then
return ''-'';
end if;
sltype := substr(psrec.slotlink, 1, 2);
if sltype = ''PS'' then
retval := trim(psrec.slotlink) || '' -> '';
return retval || pslot_backlink_view(psrec.slotlink);
end if;
if sltype = ''HS'' then
retval := comment from Hub H, HSlot HS
where HS.slotname = psrec.slotlink
and H.name = HS.hubname;
retval := retval || '' slot '';
retval := retval || slotno::text from HSlot
where slotname = psrec.slotlink;
return retval;
end if;
return psrec.slotlink;
end;
' language plpgsql;
-- ************************************************************
-- * Describe the front of a wall connector slot
-- ************************************************************
create function wslot_slotlink_view(bpchar)
returns text as '
declare
rec record;
sltype char(2);
retval text;
begin
select into rec * from WSlot where slotname = $1;
if not found then
return '''';
end if;
if rec.slotlink = '''' then
return ''-'';
end if;
sltype := substr(rec.slotlink, 1, 2);
if sltype = ''PH'' then
select into rec * from PHone where slotname = rec.slotlink;
retval := ''Phone '' || trim(rec.slotname);
if rec.comment != '''' then
retval := retval || '' ('';
retval := retval || rec.comment;
retval := retval || '')'';
end if;
return retval;
end if;
if sltype = ''IF'' then
declare
syrow System%RowType;
ifrow IFace%ROWTYPE;
begin
select into ifrow * from IFace where slotname = rec.slotlink;
select into syrow * from System where name = ifrow.sysname;
retval := syrow.name || '' IF '';
retval := retval || ifrow.ifname;
if syrow.comment != '''' then
retval := retval || '' ('';
retval := retval || syrow.comment;
retval := retval || '')'';
end if;
return retval;
end;
end if;
return rec.slotlink;
end;
' language plpgsql;
-- ************************************************************
-- * View of a patchfield describing backside and patches
-- ************************************************************
create view Pfield_v1 as select PF.pfname, PF.slotname,
pslot_backlink_view(PF.slotname) as backside,
pslot_slotlink_view(PF.slotname) as patch
from PSlot PF;
--
-- First we build the house - so we create the rooms
--
insert into Room values ('001', 'Entrance');
insert into Room values ('002', 'Office');
insert into Room values ('003', 'Office');
insert into Room values ('004', 'Technical');
insert into Room values ('101', 'Office');
insert into Room values ('102', 'Conference');
insert into Room values ('103', 'Restroom');
insert into Room values ('104', 'Technical');
insert into Room values ('105', 'Office');
insert into Room values ('106', 'Office');
--
-- Second we install the wall connectors
--
insert into WSlot values ('WS.001.1a', '001', '', '');
insert into WSlot values ('WS.001.1b', '001', '', '');
insert into WSlot values ('WS.001.2a', '001', '', '');
insert into WSlot values ('WS.001.2b', '001', '', '');
insert into WSlot values ('WS.001.3a', '001', '', '');
insert into WSlot values ('WS.001.3b', '001', '', '');
insert into WSlot values ('WS.002.1a', '002', '', '');
insert into WSlot values ('WS.002.1b', '002', '', '');
insert into WSlot values ('WS.002.2a', '002', '', '');
insert into WSlot values ('WS.002.2b', '002', '', '');
insert into WSlot values ('WS.002.3a', '002', '', '');
insert into WSlot values ('WS.002.3b', '002', '', '');
insert into WSlot values ('WS.003.1a', '003', '', '');
insert into WSlot values ('WS.003.1b', '003', '', '');
insert into WSlot values ('WS.003.2a', '003', '', '');
insert into WSlot values ('WS.003.2b', '003', '', '');
insert into WSlot values ('WS.003.3a', '003', '', '');
insert into WSlot values ('WS.003.3b', '003', '', '');
insert into WSlot values ('WS.101.1a', '101', '', '');
insert into WSlot values ('WS.101.1b', '101', '', '');
insert into WSlot values ('WS.101.2a', '101', '', '');
insert into WSlot values ('WS.101.2b', '101', '', '');
insert into WSlot values ('WS.101.3a', '101', '', '');
insert into WSlot values ('WS.101.3b', '101', '', '');
insert into WSlot values ('WS.102.1a', '102', '', '');
insert into WSlot values ('WS.102.1b', '102', '', '');
insert into WSlot values ('WS.102.2a', '102', '', '');
insert into WSlot values ('WS.102.2b', '102', '', '');
insert into WSlot values ('WS.102.3a', '102', '', '');
insert into WSlot values ('WS.102.3b', '102', '', '');
insert into WSlot values ('WS.105.1a', '105', '', '');
insert into WSlot values ('WS.105.1b', '105', '', '');
insert into WSlot values ('WS.105.2a', '105', '', '');
insert into WSlot values ('WS.105.2b', '105', '', '');
insert into WSlot values ('WS.105.3a', '105', '', '');
insert into WSlot values ('WS.105.3b', '105', '', '');
insert into WSlot values ('WS.106.1a', '106', '', '');
insert into WSlot values ('WS.106.1b', '106', '', '');
insert into WSlot values ('WS.106.2a', '106', '', '');
insert into WSlot values ('WS.106.2b', '106', '', '');
insert into WSlot values ('WS.106.3a', '106', '', '');
insert into WSlot values ('WS.106.3b', '106', '', '');
--
-- Now create the patch fields and their slots
--
insert into PField values ('PF0_1', 'Wallslots basement');
--
-- The cables for these will be made later, so they are unconnected for now
--
insert into PSlot values ('PS.base.a1', 'PF0_1', '', '');
insert into PSlot values ('PS.base.a2', 'PF0_1', '', '');
insert into PSlot values ('PS.base.a3', 'PF0_1', '', '');
insert into PSlot values ('PS.base.a4', 'PF0_1', '', '');
insert into PSlot values ('PS.base.a5', 'PF0_1', '', '');
insert into PSlot values ('PS.base.a6', 'PF0_1', '', '');
--
-- These are already wired to the wall connectors
--
insert into PSlot values ('PS.base.b1', 'PF0_1', '', 'WS.002.1a');
insert into PSlot values ('PS.base.b2', 'PF0_1', '', 'WS.002.1b');
insert into PSlot values ('PS.base.b3', 'PF0_1', '', 'WS.002.2a');
insert into PSlot values ('PS.base.b4', 'PF0_1', '', 'WS.002.2b');
insert into PSlot values ('PS.base.b5', 'PF0_1', '', 'WS.002.3a');
insert into PSlot values ('PS.base.b6', 'PF0_1', '', 'WS.002.3b');
insert into PSlot values ('PS.base.c1', 'PF0_1', '', 'WS.003.1a');
insert into PSlot values ('PS.base.c2', 'PF0_1', '', 'WS.003.1b');
insert into PSlot values ('PS.base.c3', 'PF0_1', '', 'WS.003.2a');
insert into PSlot values ('PS.base.c4', 'PF0_1', '', 'WS.003.2b');
insert into PSlot values ('PS.base.c5', 'PF0_1', '', 'WS.003.3a');
insert into PSlot values ('PS.base.c6', 'PF0_1', '', 'WS.003.3b');
--
-- This patchfield will be renamed later into PF0_2 - so its
-- slots references in pfname should follow
--
insert into PField values ('PF0_X', 'Phonelines basement');
insert into PSlot values ('PS.base.ta1', 'PF0_X', '', '');
insert into PSlot values ('PS.base.ta2', 'PF0_X', '', '');
insert into PSlot values ('PS.base.ta3', 'PF0_X', '', '');
insert into PSlot values ('PS.base.ta4', 'PF0_X', '', '');
insert into PSlot values ('PS.base.ta5', 'PF0_X', '', '');
insert into PSlot values ('PS.base.ta6', 'PF0_X', '', '');
insert into PSlot values ('PS.base.tb1', 'PF0_X', '', '');
insert into PSlot values ('PS.base.tb2', 'PF0_X', '', '');
insert into PSlot values ('PS.base.tb3', 'PF0_X', '', '');
insert into PSlot values ('PS.base.tb4', 'PF0_X', '', '');
insert into PSlot values ('PS.base.tb5', 'PF0_X', '', '');
insert into PSlot values ('PS.base.tb6', 'PF0_X', '', '');
insert into PField values ('PF1_1', 'Wallslots first floor');
insert into PSlot values ('PS.first.a1', 'PF1_1', '', 'WS.101.1a');
insert into PSlot values ('PS.first.a2', 'PF1_1', '', 'WS.101.1b');
insert into PSlot values ('PS.first.a3', 'PF1_1', '', 'WS.101.2a');
insert into PSlot values ('PS.first.a4', 'PF1_1', '', 'WS.101.2b');
insert into PSlot values ('PS.first.a5', 'PF1_1', '', 'WS.101.3a');
insert into PSlot values ('PS.first.a6', 'PF1_1', '', 'WS.101.3b');
insert into PSlot values ('PS.first.b1', 'PF1_1', '', 'WS.102.1a');
insert into PSlot values ('PS.first.b2', 'PF1_1', '', 'WS.102.1b');
insert into PSlot values ('PS.first.b3', 'PF1_1', '', 'WS.102.2a');
insert into PSlot values ('PS.first.b4', 'PF1_1', '', 'WS.102.2b');
insert into PSlot values ('PS.first.b5', 'PF1_1', '', 'WS.102.3a');
insert into PSlot values ('PS.first.b6', 'PF1_1', '', 'WS.102.3b');
insert into PSlot values ('PS.first.c1', 'PF1_1', '', 'WS.105.1a');
insert into PSlot values ('PS.first.c2', 'PF1_1', '', 'WS.105.1b');
insert into PSlot values ('PS.first.c3', 'PF1_1', '', 'WS.105.2a');
insert into PSlot values ('PS.first.c4', 'PF1_1', '', 'WS.105.2b');
insert into PSlot values ('PS.first.c5', 'PF1_1', '', 'WS.105.3a');
insert into PSlot values ('PS.first.c6', 'PF1_1', '', 'WS.105.3b');
insert into PSlot values ('PS.first.d1', 'PF1_1', '', 'WS.106.1a');
insert into PSlot values ('PS.first.d2', 'PF1_1', '', 'WS.106.1b');
insert into PSlot values ('PS.first.d3', 'PF1_1', '', 'WS.106.2a');
insert into PSlot values ('PS.first.d4', 'PF1_1', '', 'WS.106.2b');
insert into PSlot values ('PS.first.d5', 'PF1_1', '', 'WS.106.3a');
insert into PSlot values ('PS.first.d6', 'PF1_1', '', 'WS.106.3b');
--
-- Now we wire the wall connectors 1a-2a in room 001 to the
-- patchfield. In the second update we make an error, and
-- correct it after
--
update PSlot set backlink = 'WS.001.1a' where slotname = 'PS.base.a1';
update PSlot set backlink = 'WS.001.1b' where slotname = 'PS.base.a3';
select * from WSlot where roomno = '001' order by slotname;
slotname | roomno | slotlink | backlink
----------------------+----------+----------------------+----------------------
WS.001.1a | 001 | | PS.base.a1
WS.001.1b | 001 | | PS.base.a3
WS.001.2a | 001 | |
WS.001.2b | 001 | |
WS.001.3a | 001 | |
WS.001.3b | 001 | |
(6 rows)
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
slotname | pfname | slotlink | backlink
----------------------+--------+----------------------+----------------------
PS.base.a1 | PF0_1 | | WS.001.1a
PS.base.a2 | PF0_1 | |
PS.base.a3 | PF0_1 | | WS.001.1b
PS.base.a4 | PF0_1 | |
PS.base.a5 | PF0_1 | |
PS.base.a6 | PF0_1 | |
(6 rows)
update PSlot set backlink = 'WS.001.2a' where slotname = 'PS.base.a3';
select * from WSlot where roomno = '001' order by slotname;
slotname | roomno | slotlink | backlink
----------------------+----------+----------------------+----------------------
WS.001.1a | 001 | | PS.base.a1
WS.001.1b | 001 | |
WS.001.2a | 001 | | PS.base.a3
WS.001.2b | 001 | |
WS.001.3a | 001 | |
WS.001.3b | 001 | |
(6 rows)
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
slotname | pfname | slotlink | backlink
----------------------+--------+----------------------+----------------------
PS.base.a1 | PF0_1 | | WS.001.1a
PS.base.a2 | PF0_1 | |
PS.base.a3 | PF0_1 | | WS.001.2a
PS.base.a4 | PF0_1 | |
PS.base.a5 | PF0_1 | |
PS.base.a6 | PF0_1 | |
(6 rows)
update PSlot set backlink = 'WS.001.1b' where slotname = 'PS.base.a2';
select * from WSlot where roomno = '001' order by slotname;
slotname | roomno | slotlink | backlink
----------------------+----------+----------------------+----------------------
WS.001.1a | 001 | | PS.base.a1
WS.001.1b | 001 | | PS.base.a2
WS.001.2a | 001 | | PS.base.a3
WS.001.2b | 001 | |
WS.001.3a | 001 | |
WS.001.3b | 001 | |
(6 rows)
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
slotname | pfname | slotlink | backlink
----------------------+--------+----------------------+----------------------
PS.base.a1 | PF0_1 | | WS.001.1a
PS.base.a2 | PF0_1 | | WS.001.1b
PS.base.a3 | PF0_1 | | WS.001.2a
PS.base.a4 | PF0_1 | |
PS.base.a5 | PF0_1 | |
PS.base.a6 | PF0_1 | |
(6 rows)
--
-- Same procedure for 2b-3b but this time updating the WSlot instead
-- of the PSlot. Due to the triggers the result is the same:
-- WSlot and corresponding PSlot point to each other.
--
update WSlot set backlink = 'PS.base.a4' where slotname = 'WS.001.2b';
update WSlot set backlink = 'PS.base.a6' where slotname = 'WS.001.3a';
select * from WSlot where roomno = '001' order by slotname;
slotname | roomno | slotlink | backlink
----------------------+----------+----------------------+----------------------
WS.001.1a | 001 | | PS.base.a1
WS.001.1b | 001 | | PS.base.a2
WS.001.2a | 001 | | PS.base.a3
WS.001.2b | 001 | | PS.base.a4
WS.001.3a | 001 | | PS.base.a6
WS.001.3b | 001 | |
(6 rows)
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
slotname | pfname | slotlink | backlink
----------------------+--------+----------------------+----------------------
PS.base.a1 | PF0_1 | | WS.001.1a
PS.base.a2 | PF0_1 | | WS.001.1b
PS.base.a3 | PF0_1 | | WS.001.2a
PS.base.a4 | PF0_1 | | WS.001.2b
PS.base.a5 | PF0_1 | |
PS.base.a6 | PF0_1 | | WS.001.3a
(6 rows)
update WSlot set backlink = 'PS.base.a6' where slotname = 'WS.001.3b';
select * from WSlot where roomno = '001' order by slotname;
slotname | roomno | slotlink | backlink
----------------------+----------+----------------------+----------------------
WS.001.1a | 001 | | PS.base.a1
WS.001.1b | 001 | | PS.base.a2
WS.001.2a | 001 | | PS.base.a3
WS.001.2b | 001 | | PS.base.a4
WS.001.3a | 001 | |
WS.001.3b | 001 | | PS.base.a6
(6 rows)
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
slotname | pfname | slotlink | backlink
----------------------+--------+----------------------+----------------------
PS.base.a1 | PF0_1 | | WS.001.1a
PS.base.a2 | PF0_1 | | WS.001.1b
PS.base.a3 | PF0_1 | | WS.001.2a
PS.base.a4 | PF0_1 | | WS.001.2b
PS.base.a5 | PF0_1 | |
PS.base.a6 | PF0_1 | | WS.001.3b
(6 rows)
update WSlot set backlink = 'PS.base.a5' where slotname = 'WS.001.3a';
select * from WSlot where roomno = '001' order by slotname;
slotname | roomno | slotlink | backlink
----------------------+----------+----------------------+----------------------
WS.001.1a | 001 | | PS.base.a1
WS.001.1b | 001 | | PS.base.a2
WS.001.2a | 001 | | PS.base.a3
WS.001.2b | 001 | | PS.base.a4
WS.001.3a | 001 | | PS.base.a5
WS.001.3b | 001 | | PS.base.a6
(6 rows)
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
slotname | pfname | slotlink | backlink
----------------------+--------+----------------------+----------------------
PS.base.a1 | PF0_1 | | WS.001.1a
PS.base.a2 | PF0_1 | | WS.001.1b
PS.base.a3 | PF0_1 | | WS.001.2a
PS.base.a4 | PF0_1 | | WS.001.2b
PS.base.a5 | PF0_1 | | WS.001.3a
PS.base.a6 | PF0_1 | | WS.001.3b
(6 rows)
insert into PField values ('PF1_2', 'Phonelines first floor');
insert into PSlot values ('PS.first.ta1', 'PF1_2', '', '');
insert into PSlot values ('PS.first.ta2', 'PF1_2', '', '');
insert into PSlot values ('PS.first.ta3', 'PF1_2', '', '');
insert into PSlot values ('PS.first.ta4', 'PF1_2', '', '');
insert into PSlot values ('PS.first.ta5', 'PF1_2', '', '');
insert into PSlot values ('PS.first.ta6', 'PF1_2', '', '');
insert into PSlot values ('PS.first.tb1', 'PF1_2', '', '');
insert into PSlot values ('PS.first.tb2', 'PF1_2', '', '');
insert into PSlot values ('PS.first.tb3', 'PF1_2', '', '');
insert into PSlot values ('PS.first.tb4', 'PF1_2', '', '');
insert into PSlot values ('PS.first.tb5', 'PF1_2', '', '');
insert into PSlot values ('PS.first.tb6', 'PF1_2', '', '');
--
-- Fix the wrong name for patchfield PF0_2
--
update PField set name = 'PF0_2' where name = 'PF0_X';
select * from PSlot order by slotname;
slotname | pfname | slotlink | backlink
----------------------+--------+----------------------+----------------------
PS.base.a1 | PF0_1 | | WS.001.1a
PS.base.a2 | PF0_1 | | WS.001.1b
PS.base.a3 | PF0_1 | | WS.001.2a
PS.base.a4 | PF0_1 | | WS.001.2b
PS.base.a5 | PF0_1 | | WS.001.3a
PS.base.a6 | PF0_1 | | WS.001.3b
PS.base.b1 | PF0_1 | | WS.002.1a
PS.base.b2 | PF0_1 | | WS.002.1b
PS.base.b3 | PF0_1 | | WS.002.2a
PS.base.b4 | PF0_1 | | WS.002.2b
PS.base.b5 | PF0_1 | | WS.002.3a
PS.base.b6 | PF0_1 | | WS.002.3b
PS.base.c1 | PF0_1 | | WS.003.1a
PS.base.c2 | PF0_1 | | WS.003.1b
PS.base.c3 | PF0_1 | | WS.003.2a
PS.base.c4 | PF0_1 | | WS.003.2b
PS.base.c5 | PF0_1 | | WS.003.3a
PS.base.c6 | PF0_1 | | WS.003.3b
PS.base.ta1 | PF0_2 | |
PS.base.ta2 | PF0_2 | |
PS.base.ta3 | PF0_2 | |
PS.base.ta4 | PF0_2 | |
PS.base.ta5 | PF0_2 | |
PS.base.ta6 | PF0_2 | |
PS.base.tb1 | PF0_2 | |
PS.base.tb2 | PF0_2 | |
PS.base.tb3 | PF0_2 | |
PS.base.tb4 | PF0_2 | |
PS.base.tb5 | PF0_2 | |
PS.base.tb6 | PF0_2 | |
PS.first.a1 | PF1_1 | | WS.101.1a
PS.first.a2 | PF1_1 | | WS.101.1b
PS.first.a3 | PF1_1 | | WS.101.2a
PS.first.a4 | PF1_1 | | WS.101.2b
PS.first.a5 | PF1_1 | | WS.101.3a
PS.first.a6 | PF1_1 | | WS.101.3b
PS.first.b1 | PF1_1 | | WS.102.1a
PS.first.b2 | PF1_1 | | WS.102.1b
PS.first.b3 | PF1_1 | | WS.102.2a
PS.first.b4 | PF1_1 | | WS.102.2b
PS.first.b5 | PF1_1 | | WS.102.3a
PS.first.b6 | PF1_1 | | WS.102.3b
PS.first.c1 | PF1_1 | | WS.105.1a
PS.first.c2 | PF1_1 | | WS.105.1b
PS.first.c3 | PF1_1 | | WS.105.2a
PS.first.c4 | PF1_1 | | WS.105.2b
PS.first.c5 | PF1_1 | | WS.105.3a
PS.first.c6 | PF1_1 | | WS.105.3b
PS.first.d1 | PF1_1 | | WS.106.1a
PS.first.d2 | PF1_1 | | WS.106.1b
PS.first.d3 | PF1_1 | | WS.106.2a
PS.first.d4 | PF1_1 | | WS.106.2b
PS.first.d5 | PF1_1 | | WS.106.3a
PS.first.d6 | PF1_1 | | WS.106.3b
PS.first.ta1 | PF1_2 | |
PS.first.ta2 | PF1_2 | |
PS.first.ta3 | PF1_2 | |
PS.first.ta4 | PF1_2 | |
PS.first.ta5 | PF1_2 | |
PS.first.ta6 | PF1_2 | |
PS.first.tb1 | PF1_2 | |
PS.first.tb2 | PF1_2 | |
PS.first.tb3 | PF1_2 | |
PS.first.tb4 | PF1_2 | |
PS.first.tb5 | PF1_2 | |
PS.first.tb6 | PF1_2 | |
(66 rows)
select * from WSlot order by slotname;
slotname | roomno | slotlink | backlink
----------------------+----------+----------------------+----------------------
WS.001.1a | 001 | | PS.base.a1
WS.001.1b | 001 | | PS.base.a2
WS.001.2a | 001 | | PS.base.a3
WS.001.2b | 001 | | PS.base.a4
WS.001.3a | 001 | | PS.base.a5
WS.001.3b | 001 | | PS.base.a6
WS.002.1a | 002 | | PS.base.b1
WS.002.1b | 002 | | PS.base.b2
WS.002.2a | 002 | | PS.base.b3
WS.002.2b | 002 | | PS.base.b4
WS.002.3a | 002 | | PS.base.b5
WS.002.3b | 002 | | PS.base.b6
WS.003.1a | 003 | | PS.base.c1
WS.003.1b | 003 | | PS.base.c2
WS.003.2a | 003 | | PS.base.c3
WS.003.2b | 003 | | PS.base.c4
WS.003.3a | 003 | | PS.base.c5
WS.003.3b | 003 | | PS.base.c6
WS.101.1a | 101 | | PS.first.a1
WS.101.1b | 101 | | PS.first.a2
WS.101.2a | 101 | | PS.first.a3
WS.101.2b | 101 | | PS.first.a4
WS.101.3a | 101 | | PS.first.a5
WS.101.3b | 101 | | PS.first.a6
WS.102.1a | 102 | | PS.first.b1
WS.102.1b | 102 | | PS.first.b2
WS.102.2a | 102 | | PS.first.b3
WS.102.2b | 102 | | PS.first.b4
WS.102.3a | 102 | | PS.first.b5
WS.102.3b | 102 | | PS.first.b6
WS.105.1a | 105 | | PS.first.c1
WS.105.1b | 105 | | PS.first.c2
WS.105.2a | 105 | | PS.first.c3
WS.105.2b | 105 | | PS.first.c4
WS.105.3a | 105 | | PS.first.c5
WS.105.3b | 105 | | PS.first.c6
WS.106.1a | 106 | | PS.first.d1
WS.106.1b | 106 | | PS.first.d2
WS.106.2a | 106 | | PS.first.d3
WS.106.2b | 106 | | PS.first.d4
WS.106.3a | 106 | | PS.first.d5
WS.106.3b | 106 | | PS.first.d6
(42 rows)
--
-- Install the central phone system and create the phone numbers.
-- They are weired on insert to the patchfields. Again the
-- triggers automatically tell the PSlots to update their
-- backlink field.
--
insert into PLine values ('PL.001', '-0', 'Central call', 'PS.base.ta1');
insert into PLine values ('PL.002', '-101', '', 'PS.base.ta2');
insert into PLine values ('PL.003', '-102', '', 'PS.base.ta3');
insert into PLine values ('PL.004', '-103', '', 'PS.base.ta5');
insert into PLine values ('PL.005', '-104', '', 'PS.base.ta6');
insert into PLine values ('PL.006', '-106', '', 'PS.base.tb2');
insert into PLine values ('PL.007', '-108', '', 'PS.base.tb3');
insert into PLine values ('PL.008', '-109', '', 'PS.base.tb4');
insert into PLine values ('PL.009', '-121', '', 'PS.base.tb5');
insert into PLine values ('PL.010', '-122', '', 'PS.base.tb6');
insert into PLine values ('PL.015', '-134', '', 'PS.first.ta1');
insert into PLine values ('PL.016', '-137', '', 'PS.first.ta3');
insert into PLine values ('PL.017', '-139', '', 'PS.first.ta4');
insert into PLine values ('PL.018', '-362', '', 'PS.first.tb1');
insert into PLine values ('PL.019', '-363', '', 'PS.first.tb2');
insert into PLine values ('PL.020', '-364', '', 'PS.first.tb3');
insert into PLine values ('PL.021', '-365', '', 'PS.first.tb5');
insert into PLine values ('PL.022', '-367', '', 'PS.first.tb6');
insert into PLine values ('PL.028', '-501', 'Fax entrance', 'PS.base.ta2');
insert into PLine values ('PL.029', '-502', 'Fax first floor', 'PS.first.ta1');
--
-- Buy some phones, plug them into the wall and patch the
-- phone lines to the corresponding patchfield slots.
--
insert into PHone values ('PH.hc001', 'Hicom standard', 'WS.001.1a');
update PSlot set slotlink = 'PS.base.ta1' where slotname = 'PS.base.a1';
insert into PHone values ('PH.hc002', 'Hicom standard', 'WS.002.1a');
update PSlot set slotlink = 'PS.base.ta5' where slotname = 'PS.base.b1';
insert into PHone values ('PH.hc003', 'Hicom standard', 'WS.002.2a');
update PSlot set slotlink = 'PS.base.tb2' where slotname = 'PS.base.b3';
insert into PHone values ('PH.fax001', 'Canon fax', 'WS.001.2a');
update PSlot set slotlink = 'PS.base.ta2' where slotname = 'PS.base.a3';
--
-- Install a hub at one of the patchfields, plug a computers
-- ethernet interface into the wall and patch it to the hub.
--
insert into Hub values ('base.hub1', 'Patchfield PF0_1 hub', 16);
insert into System values ('orion', 'PC');
insert into IFace values ('IF', 'orion', 'eth0', 'WS.002.1b');
update PSlot set slotlink = 'HS.base.hub1.1' where slotname = 'PS.base.b2';
--
-- Now we take a look at the patchfield
--
select * from PField_v1 where pfname = 'PF0_1' order by slotname;
pfname | slotname | backside | patch
--------+----------------------+----------------------------------------------------------+-----------------------------------------------
PF0_1 | PS.base.a1 | WS.001.1a in room 001 -> Phone PH.hc001 (Hicom standard) | PS.base.ta1 -> Phone line -0 (Central call)
PF0_1 | PS.base.a2 | WS.001.1b in room 001 -> - | -
PF0_1 | PS.base.a3 | WS.001.2a in room 001 -> Phone PH.fax001 (Canon fax) | PS.base.ta2 -> Phone line -501 (Fax entrance)
PF0_1 | PS.base.a4 | WS.001.2b in room 001 -> - | -
PF0_1 | PS.base.a5 | WS.001.3a in room 001 -> - | -
PF0_1 | PS.base.a6 | WS.001.3b in room 001 -> - | -
PF0_1 | PS.base.b1 | WS.002.1a in room 002 -> Phone PH.hc002 (Hicom standard) | PS.base.ta5 -> Phone line -103
PF0_1 | PS.base.b2 | WS.002.1b in room 002 -> orion IF eth0 (PC) | Patchfield PF0_1 hub slot 1
PF0_1 | PS.base.b3 | WS.002.2a in room 002 -> Phone PH.hc003 (Hicom standard) | PS.base.tb2 -> Phone line -106
PF0_1 | PS.base.b4 | WS.002.2b in room 002 -> - | -
PF0_1 | PS.base.b5 | WS.002.3a in room 002 -> - | -
PF0_1 | PS.base.b6 | WS.002.3b in room 002 -> - | -
PF0_1 | PS.base.c1 | WS.003.1a in room 003 -> - | -
PF0_1 | PS.base.c2 | WS.003.1b in room 003 -> - | -
PF0_1 | PS.base.c3 | WS.003.2a in room 003 -> - | -
PF0_1 | PS.base.c4 | WS.003.2b in room 003 -> - | -
PF0_1 | PS.base.c5 | WS.003.3a in room 003 -> - | -
PF0_1 | PS.base.c6 | WS.003.3b in room 003 -> - | -
(18 rows)
select * from PField_v1 where pfname = 'PF0_2' order by slotname;
pfname | slotname | backside | patch
--------+----------------------+--------------------------------+------------------------------------------------------------------------
PF0_2 | PS.base.ta1 | Phone line -0 (Central call) | PS.base.a1 -> WS.001.1a in room 001 -> Phone PH.hc001 (Hicom standard)
PF0_2 | PS.base.ta2 | Phone line -501 (Fax entrance) | PS.base.a3 -> WS.001.2a in room 001 -> Phone PH.fax001 (Canon fax)
PF0_2 | PS.base.ta3 | Phone line -102 | -
PF0_2 | PS.base.ta4 | - | -
PF0_2 | PS.base.ta5 | Phone line -103 | PS.base.b1 -> WS.002.1a in room 002 -> Phone PH.hc002 (Hicom standard)
PF0_2 | PS.base.ta6 | Phone line -104 | -
PF0_2 | PS.base.tb1 | - | -
PF0_2 | PS.base.tb2 | Phone line -106 | PS.base.b3 -> WS.002.2a in room 002 -> Phone PH.hc003 (Hicom standard)
PF0_2 | PS.base.tb3 | Phone line -108 | -
PF0_2 | PS.base.tb4 | Phone line -109 | -
PF0_2 | PS.base.tb5 | Phone line -121 | -
PF0_2 | PS.base.tb6 | Phone line -122 | -
(12 rows)
--
-- Finally we want errors
--
insert into PField values ('PF1_1', 'should fail due to unique index');
ERROR: duplicate key value violates unique constraint "pfield_name"
DETAIL: Key (name)=(PF1_1) already exists.
update PSlot set backlink = 'WS.not.there' where slotname = 'PS.base.a1';
ERROR: WS.not.there does not exist
CONTEXT: PL/pgSQL function "tg_backlink_a" line 17 at assignment
update PSlot set backlink = 'XX.illegal' where slotname = 'PS.base.a1';
ERROR: illegal backlink beginning with XX
CONTEXT: PL/pgSQL function "tg_backlink_a" line 17 at assignment
update PSlot set slotlink = 'PS.not.there' where slotname = 'PS.base.a1';
ERROR: PS.not.there does not exist
CONTEXT: PL/pgSQL function "tg_slotlink_a" line 17 at assignment
update PSlot set slotlink = 'XX.illegal' where slotname = 'PS.base.a1';
ERROR: illegal slotlink beginning with XX
CONTEXT: PL/pgSQL function "tg_slotlink_a" line 17 at assignment
insert into HSlot values ('HS', 'base.hub1', 1, '');
ERROR: duplicate key value violates unique constraint "hslot_name"
DETAIL: Key (slotname)=(HS.base.hub1.1 ) already exists.
insert into HSlot values ('HS', 'base.hub1', 20, '');
ERROR: no manual manipulation of HSlot
delete from HSlot;
ERROR: no manual manipulation of HSlot
insert into IFace values ('IF', 'notthere', 'eth0', '');
ERROR: system "notthere" does not exist
insert into IFace values ('IF', 'orion', 'ethernet_interface_name_too_long', '');
ERROR: IFace slotname "IF.orion.ethernet_interface_name_too_long" too long (20 char max)
--
-- The following tests are unrelated to the scenario outlined above;
-- they merely exercise specific parts of PL/PgSQL
--
--
-- Test recursion, per bug report 7-Sep-01
--
CREATE FUNCTION recursion_test(int,int) RETURNS text AS '
DECLARE rslt text;
BEGIN
IF $1 <= 0 THEN
rslt = CAST($2 AS TEXT);
ELSE
rslt = CAST($1 AS TEXT) || '','' || recursion_test($1 - 1, $2);
END IF;
RETURN rslt;
END;' LANGUAGE plpgsql;
SELECT recursion_test(4,3);
recursion_test
----------------
4,3,2,1,3
(1 row)
--
-- Test the FOUND magic variable
--
CREATE TABLE found_test_tbl (a int);
create function test_found()
returns boolean as '
declare
begin
insert into found_test_tbl values (1);
if FOUND then
insert into found_test_tbl values (2);
end if;
update found_test_tbl set a = 100 where a = 1;
if FOUND then
insert into found_test_tbl values (3);
end if;
delete from found_test_tbl where a = 9999; -- matches no rows
if not FOUND then
insert into found_test_tbl values (4);
end if;
for i in 1 .. 10 loop
-- no need to do anything
end loop;
if FOUND then
insert into found_test_tbl values (5);
end if;
-- never executes the loop
for i in 2 .. 1 loop
-- no need to do anything
end loop;
if not FOUND then
insert into found_test_tbl values (6);
end if;
return true;
end;' language plpgsql;
select test_found();
test_found
------------
t
(1 row)
select * from found_test_tbl;
a
-----
2
100
3
4
5
6
(6 rows)
--
-- Test set-returning functions for PL/pgSQL
--
create function test_table_func_rec() returns setof found_test_tbl as '
DECLARE
rec RECORD;
BEGIN
FOR rec IN select * from found_test_tbl LOOP
RETURN NEXT rec;
END LOOP;
RETURN;
END;' language plpgsql;
select * from test_table_func_rec();
a
-----
2
100
3
4
5
6
(6 rows)
create function test_table_func_row() returns setof found_test_tbl as '
DECLARE
row found_test_tbl%ROWTYPE;
BEGIN
FOR row IN select * from found_test_tbl LOOP
RETURN NEXT row;
END LOOP;
RETURN;
END;' language plpgsql;
select * from test_table_func_row();
a
-----
2
100
3
4
5
6
(6 rows)
create function test_ret_set_scalar(int,int) returns setof int as '
DECLARE
i int;
BEGIN
FOR i IN $1 .. $2 LOOP
RETURN NEXT i + 1;
END LOOP;
RETURN;
END;' language plpgsql;
select * from test_ret_set_scalar(1,10);
test_ret_set_scalar
---------------------
2
3
4
5
6
7
8
9
10
11
(10 rows)
create function test_ret_set_rec_dyn(int) returns setof record as '
DECLARE
retval RECORD;
BEGIN
IF $1 > 10 THEN
SELECT INTO retval 5, 10, 15;
RETURN NEXT retval;
RETURN NEXT retval;
ELSE
SELECT INTO retval 50, 5::numeric, ''xxx''::text;
RETURN NEXT retval;
RETURN NEXT retval;
END IF;
RETURN;
END;' language plpgsql;
SELECT * FROM test_ret_set_rec_dyn(1500) AS (a int, b int, c int);
a | b | c
---+----+----
5 | 10 | 15
5 | 10 | 15
(2 rows)
SELECT * FROM test_ret_set_rec_dyn(5) AS (a int, b numeric, c text);
a | b | c
----+---+-----
50 | 5 | xxx
50 | 5 | xxx
(2 rows)
create function test_ret_rec_dyn(int) returns record as '
DECLARE
retval RECORD;
BEGIN
IF $1 > 10 THEN
SELECT INTO retval 5, 10, 15;
RETURN retval;
ELSE
SELECT INTO retval 50, 5::numeric, ''xxx''::text;
RETURN retval;
END IF;
END;' language plpgsql;
SELECT * FROM test_ret_rec_dyn(1500) AS (a int, b int, c int);
a | b | c
---+----+----
5 | 10 | 15
(1 row)
SELECT * FROM test_ret_rec_dyn(5) AS (a int, b numeric, c text);
a | b | c
----+---+-----
50 | 5 | xxx
(1 row)
--
-- Test handling of OUT parameters, including polymorphic cases.
-- Note that RETURN is optional with OUT params; we try both ways.
--
-- wrong way to do it:
create function f1(in i int, out j int) returns int as $$
begin
return i+1;
end$$ language plpgsql;
ERROR: RETURN cannot have a parameter in function with OUT parameters
LINE 3: return i+1;
^
create function f1(in i int, out j int) as $$
begin
j := i+1;
return;
end$$ language plpgsql;
select f1(42);
f1
----
43
(1 row)
select * from f1(42);
j
----
43
(1 row)
create or replace function f1(inout i int) as $$
begin
i := i+1;
end$$ language plpgsql;
select f1(42);
f1
----
43
(1 row)
select * from f1(42);
i
----
43
(1 row)
drop function f1(int);
create function f1(in i int, out j int) returns setof int as $$
begin
j := i+1;
return next;
j := i+2;
return next;
return;
end$$ language plpgsql;
select * from f1(42);
j
----
43
44
(2 rows)
drop function f1(int);
create function f1(in i int, out j int, out k text) as $$
begin
j := i;
j := j+1;
k := 'foo';
end$$ language plpgsql;
select f1(42);
f1
----------
(43,foo)
(1 row)
select * from f1(42);
j | k
----+-----
43 | foo
(1 row)
drop function f1(int);
create function f1(in i int, out j int, out k text) returns setof record as $$
begin
j := i+1;
k := 'foo';
return next;
j := j+1;
k := 'foot';
return next;
end$$ language plpgsql;
select * from f1(42);
j | k
----+------
43 | foo
44 | foot
(2 rows)
drop function f1(int);
create function duplic(in i anyelement, out j anyelement, out k anyarray) as $$
begin
j := i;
k := array[j,j];
return;
end$$ language plpgsql;
select * from duplic(42);
j | k
----+---------
42 | {42,42}
(1 row)
select * from duplic('foo'::text);
j | k
-----+-----------
foo | {foo,foo}
(1 row)
drop function duplic(anyelement);
--
-- test PERFORM
--
create table perform_test (
a INT,
b INT
);
create function simple_func(int) returns boolean as '
BEGIN
IF $1 < 20 THEN
INSERT INTO perform_test VALUES ($1, $1 + 10);
RETURN TRUE;
ELSE
RETURN FALSE;
END IF;
END;' language plpgsql;
create function perform_test_func() returns void as '
BEGIN
IF FOUND then
INSERT INTO perform_test VALUES (100, 100);
END IF;
PERFORM simple_func(5);
IF FOUND then
INSERT INTO perform_test VALUES (100, 100);
END IF;
PERFORM simple_func(50);
IF FOUND then
INSERT INTO perform_test VALUES (100, 100);
END IF;
RETURN;
END;' language plpgsql;
SELECT perform_test_func();
perform_test_func
-------------------
(1 row)
SELECT * FROM perform_test;
a | b
-----+-----
5 | 15
100 | 100
100 | 100
(3 rows)
drop table perform_test;
--
-- Test error trapping
--
create function trap_zero_divide(int) returns int as $$
declare x int;
sx smallint;
begin
begin -- start a subtransaction
raise notice 'should see this';
x := 100 / $1;
raise notice 'should see this only if % <> 0', $1;
sx := $1;
raise notice 'should see this only if % fits in smallint', $1;
if $1 < 0 then
raise exception '% is less than zero', $1;
end if;
exception
when division_by_zero then
raise notice 'caught division_by_zero';
x := -1;
when NUMERIC_VALUE_OUT_OF_RANGE then
raise notice 'caught numeric_value_out_of_range';
x := -2;
end;
return x;
end$$ language plpgsql;
select trap_zero_divide(50);
NOTICE: should see this
NOTICE: should see this only if 50 <> 0
NOTICE: should see this only if 50 fits in smallint
trap_zero_divide
------------------
2
(1 row)
select trap_zero_divide(0);
NOTICE: should see this
NOTICE: caught division_by_zero
trap_zero_divide
------------------
-1
(1 row)
select trap_zero_divide(100000);
NOTICE: should see this
NOTICE: should see this only if 100000 <> 0
NOTICE: caught numeric_value_out_of_range
trap_zero_divide
------------------
-2
(1 row)
select trap_zero_divide(-100);
NOTICE: should see this
NOTICE: should see this only if -100 <> 0
NOTICE: should see this only if -100 fits in smallint
ERROR: -100 is less than zero
create function trap_matching_test(int) returns int as $$
declare x int;
sx smallint;
y int;
begin
begin -- start a subtransaction
x := 100 / $1;
sx := $1;
select into y unique1 from tenk1 where unique2 =
(select unique2 from tenk1 b where ten = $1);
exception
when data_exception then -- category match
raise notice 'caught data_exception';
x := -1;
when NUMERIC_VALUE_OUT_OF_RANGE OR CARDINALITY_VIOLATION then
raise notice 'caught numeric_value_out_of_range or cardinality_violation';
x := -2;
end;
return x;
end$$ language plpgsql;
select trap_matching_test(50);
trap_matching_test
--------------------
2
(1 row)
select trap_matching_test(0);
NOTICE: caught data_exception
trap_matching_test
--------------------
-1
(1 row)
select trap_matching_test(100000);
NOTICE: caught data_exception
trap_matching_test
--------------------
-1
(1 row)
select trap_matching_test(1);
NOTICE: caught numeric_value_out_of_range or cardinality_violation
trap_matching_test
--------------------
-2
(1 row)
create temp table foo (f1 int);
create function blockme() returns int as $$
declare x int;
begin
x := 1;
insert into foo values(x);
begin
x := x + 1;
insert into foo values(x);
-- we assume this will take longer than 2 seconds:
select count(*) into x from tenk1 a, tenk1 b, tenk1 c;
exception
when others then
raise notice 'caught others?';
return -1;
when query_canceled then
raise notice 'nyeah nyeah, can''t stop me';
x := x * 10;
end;
insert into foo values(x);
return x;
end$$ language plpgsql;
set statement_timeout to 2000;
select blockme();
NOTICE: nyeah nyeah, can't stop me
blockme
---------
20
(1 row)
reset statement_timeout;
select * from foo;
f1
----
1
20
(2 rows)
drop table foo;
-- Test for pass-by-ref values being stored in proper context
create function test_variable_storage() returns text as $$
declare x text;
begin
x := '1234';
begin
x := x || '5678';
-- force error inside subtransaction SPI context
perform trap_zero_divide(-100);
exception
when others then
x := x || '9012';
end;
return x;
end$$ language plpgsql;
select test_variable_storage();
NOTICE: should see this
CONTEXT: SQL statement "SELECT trap_zero_divide(-100)"
PL/pgSQL function "test_variable_storage" line 8 at PERFORM
NOTICE: should see this only if -100 <> 0
CONTEXT: SQL statement "SELECT trap_zero_divide(-100)"
PL/pgSQL function "test_variable_storage" line 8 at PERFORM
NOTICE: should see this only if -100 fits in smallint
CONTEXT: SQL statement "SELECT trap_zero_divide(-100)"
PL/pgSQL function "test_variable_storage" line 8 at PERFORM
test_variable_storage
-----------------------
123456789012
(1 row)
--
-- test foreign key error trapping
--
create temp table master(f1 int primary key);
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "master_pkey" for table "master"
create temp table slave(f1 int references master deferrable);
insert into master values(1);
insert into slave values(1);
insert into slave values(2); -- fails
ERROR: insert or update on table "slave" violates foreign key constraint "slave_f1_fkey"
DETAIL: Key (f1)=(2) is not present in table "master".
create function trap_foreign_key(int) returns int as $$
begin
begin -- start a subtransaction
insert into slave values($1);
exception
when foreign_key_violation then
raise notice 'caught foreign_key_violation';
return 0;
end;
return 1;
end$$ language plpgsql;
create function trap_foreign_key_2() returns int as $$
begin
begin -- start a subtransaction
set constraints all immediate;
exception
when foreign_key_violation then
raise notice 'caught foreign_key_violation';
return 0;
end;
return 1;
end$$ language plpgsql;
select trap_foreign_key(1);
trap_foreign_key
------------------
1
(1 row)
select trap_foreign_key(2); -- detects FK violation
NOTICE: caught foreign_key_violation
trap_foreign_key
------------------
0
(1 row)
begin;
set constraints all deferred;
select trap_foreign_key(2); -- should not detect FK violation
trap_foreign_key
------------------
1
(1 row)
savepoint x;
set constraints all immediate; -- fails
ERROR: insert or update on table "slave" violates foreign key constraint "slave_f1_fkey"
DETAIL: Key (f1)=(2) is not present in table "master".
rollback to x;
select trap_foreign_key_2(); -- detects FK violation
NOTICE: caught foreign_key_violation
trap_foreign_key_2
--------------------
0
(1 row)
commit; -- still fails
ERROR: insert or update on table "slave" violates foreign key constraint "slave_f1_fkey"
DETAIL: Key (f1)=(2) is not present in table "master".
drop function trap_foreign_key(int);
drop function trap_foreign_key_2();
--
-- Test proper snapshot handling in simple expressions
--
create temp table users(login text, id serial);
NOTICE: CREATE TABLE will create implicit sequence "users_id_seq" for serial column "users.id"
create function sp_id_user(a_login text) returns int as $$
declare x int;
begin
select into x id from users where login = a_login;
if found then return x; end if;
return 0;
end$$ language plpgsql stable;
insert into users values('user1');
select sp_id_user('user1');
sp_id_user
------------
1
(1 row)
select sp_id_user('userx');
sp_id_user
------------
0
(1 row)
create function sp_add_user(a_login text) returns int as $$
declare my_id_user int;
begin
my_id_user = sp_id_user( a_login );
IF my_id_user > 0 THEN
RETURN -1; -- error code for existing user
END IF;
INSERT INTO users ( login ) VALUES ( a_login );
my_id_user = sp_id_user( a_login );
IF my_id_user = 0 THEN
RETURN -2; -- error code for insertion failure
END IF;
RETURN my_id_user;
end$$ language plpgsql;
select sp_add_user('user1');
sp_add_user
-------------
-1
(1 row)
select sp_add_user('user2');
sp_add_user
-------------
2
(1 row)
select sp_add_user('user2');
sp_add_user
-------------
-1
(1 row)
select sp_add_user('user3');
sp_add_user
-------------
3
(1 row)
select sp_add_user('user3');
sp_add_user
-------------
-1
(1 row)
drop function sp_add_user(text);
drop function sp_id_user(text);
--
-- tests for refcursors
--
create table rc_test (a int, b int);
copy rc_test from stdin;
create function return_refcursor(rc refcursor) returns refcursor as $$
begin
open rc for select a from rc_test;
return rc;
end
$$ language plpgsql;
create function refcursor_test1(refcursor) returns refcursor as $$
begin
perform return_refcursor($1);
return $1;
end
$$ language plpgsql;
begin;
select refcursor_test1('test1');
refcursor_test1
-----------------
test1
(1 row)
fetch next in test1;
a
---
5
(1 row)
select refcursor_test1('test2');
refcursor_test1
-----------------
test2
(1 row)
fetch all from test2;
a
-----
5
50
500
(3 rows)
commit;
-- should fail
fetch next from test1;
ERROR: cursor "test1" does not exist
create function refcursor_test2(int, int) returns boolean as $$
declare
c1 cursor (param1 int, param2 int) for select * from rc_test where a > param1 and b > param2;
nonsense record;
begin
open c1($1, $2);
fetch c1 into nonsense;
close c1;
if found then
return true;
else
return false;
end if;
end
$$ language plpgsql;
select refcursor_test2(20000, 20000) as "Should be false",
refcursor_test2(20, 20) as "Should be true";
Should be false | Should be true
-----------------+----------------
f | t
(1 row)
--
-- tests for "raise" processing
--
create function raise_test1(int) returns int as $$
begin
raise notice 'This message has too many parameters!', $1;
return $1;
end;
$$ language plpgsql;
select raise_test1(5);
ERROR: too many parameters specified for RAISE
CONTEXT: PL/pgSQL function "raise_test1" line 3 at RAISE
create function raise_test2(int) returns int as $$
begin
raise notice 'This message has too few parameters: %, %, %', $1, $1;
return $1;
end;
$$ language plpgsql;
select raise_test2(10);
ERROR: too few parameters specified for RAISE
CONTEXT: PL/pgSQL function "raise_test2" line 3 at RAISE
-- Test re-RAISE inside a nested exception block. This case is allowed
-- by Oracle's PL/SQL but was handled differently by PG before 9.1.
CREATE FUNCTION reraise_test() RETURNS void AS $$
BEGIN
BEGIN
RAISE syntax_error;
EXCEPTION
WHEN syntax_error THEN
BEGIN
raise notice 'exception % thrown in inner block, reraising', sqlerrm;
RAISE;
EXCEPTION
WHEN OTHERS THEN
raise notice 'RIGHT - exception % caught in inner block', sqlerrm;
END;
END;
EXCEPTION
WHEN OTHERS THEN
raise notice 'WRONG - exception % caught in outer block', sqlerrm;
END;
$$ LANGUAGE plpgsql;
SELECT reraise_test();
NOTICE: exception syntax_error thrown in inner block, reraising
NOTICE: RIGHT - exception syntax_error caught in inner block
reraise_test
--------------
(1 row)
--
-- reject function definitions that contain malformed SQL queries at
-- compile-time, where possible
--
create function bad_sql1() returns int as $$
declare a int;
begin
a := 5;
Johnny Yuma;
a := 10;
return a;
end$$ language plpgsql;
ERROR: syntax error at or near "Johnny"
LINE 5: Johnny Yuma;
^
create function bad_sql2() returns int as $$
declare r record;
begin
for r in select I fought the law, the law won LOOP
raise notice 'in loop';
end loop;
return 5;
end;$$ language plpgsql;
ERROR: syntax error at or near "the"
LINE 4: for r in select I fought the law, the law won LOOP
^
-- a RETURN expression is mandatory, except for void-returning
-- functions, where it is not allowed
create function missing_return_expr() returns int as $$
begin
return ;
end;$$ language plpgsql;
ERROR: missing expression at or near ";"
LINE 3: return ;
^
create function void_return_expr() returns void as $$
begin
return 5;
end;$$ language plpgsql;
ERROR: RETURN cannot have a parameter in function returning void
LINE 3: return 5;
^
-- VOID functions are allowed to omit RETURN
create function void_return_expr() returns void as $$
begin
perform 2+2;
end;$$ language plpgsql;
select void_return_expr();
void_return_expr
------------------
(1 row)
-- but ordinary functions are not
create function missing_return_expr() returns int as $$
begin
perform 2+2;
end;$$ language plpgsql;
select missing_return_expr();
ERROR: control reached end of function without RETURN
CONTEXT: PL/pgSQL function "missing_return_expr"
drop function void_return_expr();
drop function missing_return_expr();
--
-- EXECUTE ... INTO test
--
create table eifoo (i integer, y integer);
create type eitype as (i integer, y integer);
create or replace function execute_into_test(varchar) returns record as $$
declare
_r record;
_rt eifoo%rowtype;
_v eitype;
i int;
j int;
k int;
begin
execute 'insert into '||$1||' values(10,15)';
execute 'select (row).* from (select row(10,1)::eifoo) s' into _r;
raise notice '% %', _r.i, _r.y;
execute 'select * from '||$1||' limit 1' into _rt;
raise notice '% %', _rt.i, _rt.y;
execute 'select *, 20 from '||$1||' limit 1' into i, j, k;
raise notice '% % %', i, j, k;
execute 'select 1,2' into _v;
return _v;
end; $$ language plpgsql;
select execute_into_test('eifoo');
NOTICE: 10 1
NOTICE: 10 15
NOTICE: 10 15 20
execute_into_test
-------------------
(1,2)
(1 row)
drop table eifoo cascade;
drop type eitype cascade;
--
-- SQLSTATE and SQLERRM test
--
create function excpt_test1() returns void as $$
begin
raise notice '% %', sqlstate, sqlerrm;
end; $$ language plpgsql;
-- should fail: SQLSTATE and SQLERRM are only in defined EXCEPTION
-- blocks
select excpt_test1();
ERROR: column "sqlstate" does not exist
LINE 1: SELECT sqlstate
^
QUERY: SELECT sqlstate
CONTEXT: PL/pgSQL function "excpt_test1" line 3 at RAISE
create function excpt_test2() returns void as $$
begin
begin
begin
raise notice '% %', sqlstate, sqlerrm;
end;
end;
end; $$ language plpgsql;
-- should fail
select excpt_test2();
ERROR: column "sqlstate" does not exist
LINE 1: SELECT sqlstate
^
QUERY: SELECT sqlstate
CONTEXT: PL/pgSQL function "excpt_test2" line 5 at RAISE
create function excpt_test3() returns void as $$
begin
begin
raise exception 'user exception';
exception when others then
raise notice 'caught exception % %', sqlstate, sqlerrm;
begin
raise notice '% %', sqlstate, sqlerrm;
perform 10/0;
exception
when substring_error then
-- this exception handler shouldn't be invoked
raise notice 'unexpected exception: % %', sqlstate, sqlerrm;
when division_by_zero then
raise notice 'caught exception % %', sqlstate, sqlerrm;
end;
raise notice '% %', sqlstate, sqlerrm;
end;
end; $$ language plpgsql;
select excpt_test3();
NOTICE: caught exception P0001 user exception
NOTICE: P0001 user exception
NOTICE: caught exception 22012 division by zero
NOTICE: P0001 user exception
excpt_test3
-------------
(1 row)
drop function excpt_test1();
drop function excpt_test2();
drop function excpt_test3();
-- parameters of raise stmt can be expressions
create function raise_exprs() returns void as $$
declare
a integer[] = '{10,20,30}';
c varchar = 'xyz';
i integer;
begin
i := 2;
raise notice '%; %; %; %; %; %', a, a[i], c, (select c || 'abc'), row(10,'aaa',NULL,30), NULL;
end;$$ language plpgsql;
select raise_exprs();
NOTICE: {10,20,30}; 20; xyz; xyzabc; (10,aaa,,30); <NULL>
raise_exprs
-------------
(1 row)
drop function raise_exprs();
-- continue statement
create table conttesttbl(idx serial, v integer);
NOTICE: CREATE TABLE will create implicit sequence "conttesttbl_idx_seq" for serial column "conttesttbl.idx"
insert into conttesttbl(v) values(10);
insert into conttesttbl(v) values(20);
insert into conttesttbl(v) values(30);
insert into conttesttbl(v) values(40);
create function continue_test1() returns void as $$
declare _i integer = 0; _r record;
begin
raise notice '---1---';
loop
_i := _i + 1;
raise notice '%', _i;
continue when _i < 10;
exit;
end loop;
raise notice '---2---';
<<lbl>>
loop
_i := _i - 1;
loop
raise notice '%', _i;
continue lbl when _i > 0;
exit lbl;
end loop;
end loop;
raise notice '---3---';
<<the_loop>>
while _i < 10 loop
_i := _i + 1;
continue the_loop when _i % 2 = 0;
raise notice '%', _i;
end loop;
raise notice '---4---';
for _i in 1..10 loop
begin
-- applies to outer loop, not the nested begin block
continue when _i < 5;
raise notice '%', _i;
end;
end loop;
raise notice '---5---';
for _r in select * from conttesttbl loop
continue when _r.v <= 20;
raise notice '%', _r.v;
end loop;
raise notice '---6---';
for _r in execute 'select * from conttesttbl' loop
continue when _r.v <= 20;
raise notice '%', _r.v;
end loop;
raise notice '---7---';
for _i in 1..3 loop
raise notice '%', _i;
continue when _i = 3;
end loop;
raise notice '---8---';
_i := 1;
while _i <= 3 loop
raise notice '%', _i;
_i := _i + 1;
continue when _i = 3;
end loop;
raise notice '---9---';
for _r in select * from conttesttbl order by v limit 1 loop
raise notice '%', _r.v;
continue;
end loop;
raise notice '---10---';
for _r in execute 'select * from conttesttbl order by v limit 1' loop
raise notice '%', _r.v;
continue;
end loop;
end; $$ language plpgsql;
select continue_test1();
NOTICE: ---1---
NOTICE: 1
NOTICE: 2
NOTICE: 3
NOTICE: 4
NOTICE: 5
NOTICE: 6
NOTICE: 7
NOTICE: 8
NOTICE: 9
NOTICE: 10
NOTICE: ---2---
NOTICE: 9
NOTICE: 8
NOTICE: 7
NOTICE: 6
NOTICE: 5
NOTICE: 4
NOTICE: 3
NOTICE: 2
NOTICE: 1
NOTICE: 0
NOTICE: ---3---
NOTICE: 1
NOTICE: 3
NOTICE: 5
NOTICE: 7
NOTICE: 9
NOTICE: ---4---
NOTICE: 5
NOTICE: 6
NOTICE: 7
NOTICE: 8
NOTICE: 9
NOTICE: 10
NOTICE: ---5---
NOTICE: 30
NOTICE: 40
NOTICE: ---6---
NOTICE: 30
NOTICE: 40
NOTICE: ---7---
NOTICE: 1
NOTICE: 2
NOTICE: 3
NOTICE: ---8---
NOTICE: 1
NOTICE: 2
NOTICE: 3
NOTICE: ---9---
NOTICE: 10
NOTICE: ---10---
NOTICE: 10
continue_test1
----------------
(1 row)
-- CONTINUE is only legal inside a loop
create function continue_test2() returns void as $$
begin
begin
continue;
end;
return;
end;
$$ language plpgsql;
-- should fail
select continue_test2();
ERROR: CONTINUE cannot be used outside a loop
CONTEXT: PL/pgSQL function "continue_test2"
-- CONTINUE can't reference the label of a named block
create function continue_test3() returns void as $$
begin
<<begin_block1>>
begin
loop
continue begin_block1;
end loop;
end;
end;
$$ language plpgsql;
-- should fail
select continue_test3();
ERROR: CONTINUE cannot be used outside a loop
CONTEXT: PL/pgSQL function "continue_test3"
drop function continue_test1();
drop function continue_test2();
drop function continue_test3();
drop table conttesttbl;
-- verbose end block and end loop
create function end_label1() returns void as $$
<<blbl>>
begin
<<flbl1>>
for _i in 1 .. 10 loop
exit flbl1;
end loop flbl1;
<<flbl2>>
for _i in 1 .. 10 loop
exit flbl2;
end loop;
end blbl;
$$ language plpgsql;
select end_label1();
end_label1
------------
(1 row)
drop function end_label1();
-- should fail: undefined end label
create function end_label2() returns void as $$
begin
for _i in 1 .. 10 loop
exit;
end loop flbl1;
end;
$$ language plpgsql;
ERROR: label does not exist at or near "flbl1"
LINE 5: end loop flbl1;
^
-- should fail: end label does not match start label
create function end_label3() returns void as $$
<<outer_label>>
begin
<<inner_label>>
for _i in 1 .. 10 loop
exit;
end loop outer_label;
end;
$$ language plpgsql;
ERROR: end label "outer_label" differs from block's label "inner_label"
LINE 7: end loop outer_label;
^
-- should fail: end label on a block without a start label
create function end_label4() returns void as $$
<<outer_label>>
begin
for _i in 1 .. 10 loop
exit;
end loop outer_label;
end;
$$ language plpgsql;
ERROR: end label "outer_label" specified for unlabelled block
LINE 6: end loop outer_label;
^
-- using list of scalars in fori and fore stmts
create function for_vect() returns void as $proc$
<<lbl>>declare a integer; b varchar; c varchar; r record;
begin
-- fori
for i in 1 .. 3 loop
raise notice '%', i;
end loop;
-- fore with record var
for r in select gs as aa, 'BB' as bb, 'CC' as cc from generate_series(1,4) gs loop
raise notice '% % %', r.aa, r.bb, r.cc;
end loop;
-- fore with single scalar
for a in select gs from generate_series(1,4) gs loop
raise notice '%', a;
end loop;
-- fore with multiple scalars
for a,b,c in select gs, 'BB','CC' from generate_series(1,4) gs loop
raise notice '% % %', a, b, c;
end loop;
-- using qualified names in fors, fore is enabled, disabled only for fori
for lbl.a, lbl.b, lbl.c in execute $$select gs, 'bb','cc' from generate_series(1,4) gs$$ loop
raise notice '% % %', a, b, c;
end loop;
end;
$proc$ language plpgsql;
select for_vect();
NOTICE: 1
NOTICE: 2
NOTICE: 3
NOTICE: 1 BB CC
NOTICE: 2 BB CC
NOTICE: 3 BB CC
NOTICE: 4 BB CC
NOTICE: 1
NOTICE: 2
NOTICE: 3
NOTICE: 4
NOTICE: 1 BB CC
NOTICE: 2 BB CC
NOTICE: 3 BB CC
NOTICE: 4 BB CC
NOTICE: 1 bb cc
NOTICE: 2 bb cc
NOTICE: 3 bb cc
NOTICE: 4 bb cc
for_vect
----------
(1 row)
-- regression test: verify that multiple uses of same plpgsql datum within
-- a SQL command all get mapped to the same $n parameter. The return value
-- of the SELECT is not important, we only care that it doesn't fail with
-- a complaint about an ungrouped column reference.
create function multi_datum_use(p1 int) returns bool as $$
declare
x int;
y int;
begin
select into x,y unique1/p1, unique1/$1 from tenk1 group by unique1/p1;
return x = y;
end$$ language plpgsql;
select multi_datum_use(42);
multi_datum_use
-----------------
t
(1 row)
--
-- Test STRICT limiter in both planned and EXECUTE invocations.
-- Note that a data-modifying query is quasi strict (disallow multi rows)
-- by default in the planned case, but not in EXECUTE.
--
create temp table foo (f1 int, f2 int);
insert into foo values (1,2), (3,4);
create or replace function footest() returns void as $$
declare x record;
begin
-- should work
insert into foo values(5,6) returning * into x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select footest();
NOTICE: x.f1 = 5, x.f2 = 6
footest
---------
(1 row)
create or replace function footest() returns void as $$
declare x record;
begin
-- should fail due to implicit strict
insert into foo values(7,8),(9,10) returning * into x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select footest();
ERROR: query returned more than one row
CONTEXT: PL/pgSQL function "footest" line 5 at SQL statement
create or replace function footest() returns void as $$
declare x record;
begin
-- should work
execute 'insert into foo values(5,6) returning *' into x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select footest();
NOTICE: x.f1 = 5, x.f2 = 6
footest
---------
(1 row)
create or replace function footest() returns void as $$
declare x record;
begin
-- this should work since EXECUTE isn't as picky
execute 'insert into foo values(7,8),(9,10) returning *' into x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select footest();
NOTICE: x.f1 = 7, x.f2 = 8
footest
---------
(1 row)
select * from foo;
f1 | f2
----+----
1 | 2
3 | 4
5 | 6
5 | 6
7 | 8
9 | 10
(6 rows)
create or replace function footest() returns void as $$
declare x record;
begin
-- should work
select * from foo where f1 = 3 into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select footest();
NOTICE: x.f1 = 3, x.f2 = 4
footest
---------
(1 row)
create or replace function footest() returns void as $$
declare x record;
begin
-- should fail, no rows
select * from foo where f1 = 0 into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select footest();
ERROR: query returned no rows
CONTEXT: PL/pgSQL function "footest" line 5 at SQL statement
create or replace function footest() returns void as $$
declare x record;
begin
-- should fail, too many rows
select * from foo where f1 > 3 into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select footest();
ERROR: query returned more than one row
CONTEXT: PL/pgSQL function "footest" line 5 at SQL statement
create or replace function footest() returns void as $$
declare x record;
begin
-- should work
execute 'select * from foo where f1 = 3' into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select footest();
NOTICE: x.f1 = 3, x.f2 = 4
footest
---------
(1 row)
create or replace function footest() returns void as $$
declare x record;
begin
-- should fail, no rows
execute 'select * from foo where f1 = 0' into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select footest();
ERROR: query returned no rows
CONTEXT: PL/pgSQL function "footest" line 5 at EXECUTE statement
create or replace function footest() returns void as $$
declare x record;
begin
-- should fail, too many rows
execute 'select * from foo where f1 > 3' into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select footest();
ERROR: query returned more than one row
CONTEXT: PL/pgSQL function "footest" line 5 at EXECUTE statement
drop function footest();
-- test scrollable cursor support
create function sc_test() returns setof integer as $$
declare
c scroll cursor for select f1 from int4_tbl;
x integer;
begin
open c;
fetch last from c into x;
while found loop
return next x;
fetch prior from c into x;
end loop;
close c;
end;
$$ language plpgsql;
select * from sc_test();
sc_test
-------------
-2147483647
2147483647
-123456
123456
0
(5 rows)
create or replace function sc_test() returns setof integer as $$
declare
c no scroll cursor for select f1 from int4_tbl;
x integer;
begin
open c;
fetch last from c into x;
while found loop
return next x;
fetch prior from c into x;
end loop;
close c;
end;
$$ language plpgsql;
select * from sc_test(); -- fails because of NO SCROLL specification
ERROR: cursor can only scan forward
HINT: Declare it with SCROLL option to enable backward scan.
CONTEXT: PL/pgSQL function "sc_test" line 7 at FETCH
create or replace function sc_test() returns setof integer as $$
declare
c refcursor;
x integer;
begin
open c scroll for select f1 from int4_tbl;
fetch last from c into x;
while found loop
return next x;
fetch prior from c into x;
end loop;
close c;
end;
$$ language plpgsql;
select * from sc_test();
sc_test
-------------
-2147483647
2147483647
-123456
123456
0
(5 rows)
create or replace function sc_test() returns setof integer as $$
declare
c refcursor;
x integer;
begin
open c scroll for execute 'select f1 from int4_tbl';
fetch last from c into x;
while found loop
return next x;
fetch relative -2 from c into x;
end loop;
close c;
end;
$$ language plpgsql;
select * from sc_test();
sc_test
-------------
-2147483647
-123456
0
(3 rows)
create or replace function sc_test() returns setof integer as $$
declare
c refcursor;
x integer;
begin
open c scroll for execute 'select f1 from int4_tbl';
fetch last from c into x;
while found loop
return next x;
move backward 2 from c;
fetch relative -1 from c into x;
end loop;
close c;
end;
$$ language plpgsql;
select * from sc_test();
sc_test
-------------
-2147483647
123456
(2 rows)
create or replace function sc_test() returns setof integer as $$
declare
c cursor for select * from generate_series(1, 10);
x integer;
begin
open c;
loop
move relative 2 in c;
if not found then
exit;
end if;
fetch next from c into x;
if found then
return next x;
end if;
end loop;
close c;
end;
$$ language plpgsql;
select * from sc_test();
sc_test
---------
3
6
9
(3 rows)
create or replace function sc_test() returns setof integer as $$
declare
c cursor for select * from generate_series(1, 10);
x integer;
begin
open c;
move forward all in c;
fetch backward from c into x;
if found then
return next x;
end if;
close c;
end;
$$ language plpgsql;
select * from sc_test();
sc_test
---------
10
(1 row)
drop function sc_test();
-- test qualified variable names
create function pl_qual_names (param1 int) returns void as $$
<<outerblock>>
declare
param1 int := 1;
begin
<<innerblock>>
declare
param1 int := 2;
begin
raise notice 'param1 = %', param1;
raise notice 'pl_qual_names.param1 = %', pl_qual_names.param1;
raise notice 'outerblock.param1 = %', outerblock.param1;
raise notice 'innerblock.param1 = %', innerblock.param1;
end;
end;
$$ language plpgsql;
select pl_qual_names(42);
NOTICE: param1 = 2
NOTICE: pl_qual_names.param1 = 42
NOTICE: outerblock.param1 = 1
NOTICE: innerblock.param1 = 2
pl_qual_names
---------------
(1 row)
drop function pl_qual_names(int);
-- tests for RETURN QUERY
create function ret_query1(out int, out int) returns setof record as $$
begin
$1 := -1;
$2 := -2;
return next;
return query select x + 1, x * 10 from generate_series(0, 10) s (x);
return next;
end;
$$ language plpgsql;
select * from ret_query1();
column1 | column2
---------+---------
-1 | -2
1 | 0
2 | 10
3 | 20
4 | 30
5 | 40
6 | 50
7 | 60
8 | 70
9 | 80
10 | 90
11 | 100
-1 | -2
(13 rows)
create type record_type as (x text, y int, z boolean);
create or replace function ret_query2(lim int) returns setof record_type as $$
begin
return query select md5(s.x::text), s.x, s.x > 0
from generate_series(-8, lim) s (x) where s.x % 2 = 0;
end;
$$ language plpgsql;
select * from ret_query2(8);
x | y | z
----------------------------------+----+---
a8d2ec85eaf98407310b72eb73dda247 | -8 | f
596a3d04481816330f07e4f97510c28f | -6 | f
0267aaf632e87a63288a08331f22c7c3 | -4 | f
5d7b9adcbe1c629ec722529dd12e5129 | -2 | f
cfcd208495d565ef66e7dff9f98764da | 0 | f
c81e728d9d4c2f636f067f89cc14862c | 2 | t
a87ff679a2f3e71d9181a67b7542122c | 4 | t
1679091c5a880faf6fb5e6087eb1b2dc | 6 | t
c9f0f895fb98ab9159f51fd0297e236d | 8 | t
(9 rows)
-- test EXECUTE USING
create function exc_using(int, text) returns int as $$
declare i int;
begin
for i in execute 'select * from generate_series(1,$1)' using $1+1 loop
raise notice '%', i;
end loop;
execute 'select $2 + $2*3 + length($1)' into i using $2,$1;
return i;
end
$$ language plpgsql;
select exc_using(5, 'foobar');
NOTICE: 1
NOTICE: 2
NOTICE: 3
NOTICE: 4
NOTICE: 5
NOTICE: 6
exc_using
-----------
26
(1 row)
drop function exc_using(int, text);
create or replace function exc_using(int) returns void as $$
declare
c refcursor;
i int;
begin
open c for execute 'select * from generate_series(1,$1)' using $1+1;
loop
fetch c into i;
exit when not found;
raise notice '%', i;
end loop;
close c;
return;
end;
$$ language plpgsql;
select exc_using(5);
NOTICE: 1
NOTICE: 2
NOTICE: 3
NOTICE: 4
NOTICE: 5
NOTICE: 6
exc_using
-----------
(1 row)
drop function exc_using(int);
-- test FOR-over-cursor
create or replace function forc01() returns void as $$
declare
c cursor(r1 integer, r2 integer)
for select * from generate_series(r1,r2) i;
c2 cursor
for select * from generate_series(41,43) i;
begin
for r in c(5,7) loop
raise notice '% from %', r.i, c;
end loop;
-- again, to test if cursor was closed properly
for r in c(9,10) loop
raise notice '% from %', r.i, c;
end loop;
-- and test a parameterless cursor
for r in c2 loop
raise notice '% from %', r.i, c2;
end loop;
-- and try it with a hand-assigned name
raise notice 'after loop, c2 = %', c2;
c2 := 'special_name';
for r in c2 loop
raise notice '% from %', r.i, c2;
end loop;
raise notice 'after loop, c2 = %', c2;
-- and try it with a generated name
-- (which we can't show in the output because it's variable)
c2 := null;
for r in c2 loop
raise notice '%', r.i;
end loop;
raise notice 'after loop, c2 = %', c2;
return;
end;
$$ language plpgsql;
select forc01();
NOTICE: 5 from c
NOTICE: 6 from c
NOTICE: 7 from c
NOTICE: 9 from c
NOTICE: 10 from c
NOTICE: 41 from c2
NOTICE: 42 from c2
NOTICE: 43 from c2
NOTICE: after loop, c2 = c2
NOTICE: 41 from special_name
NOTICE: 42 from special_name
NOTICE: 43 from special_name
NOTICE: after loop, c2 = special_name
NOTICE: 41
NOTICE: 42
NOTICE: 43
NOTICE: after loop, c2 = <NULL>
forc01
--------
(1 row)
-- try updating the cursor's current row
create temp table forc_test as
select n as i, n as j from generate_series(1,10) n;
create or replace function forc01() returns void as $$
declare
c cursor for select * from forc_test;
begin
for r in c loop
raise notice '%, %', r.i, r.j;
update forc_test set i = i * 100, j = r.j * 2 where current of c;
end loop;
end;
$$ language plpgsql;
select forc01();
NOTICE: 1, 1
NOTICE: 2, 2
NOTICE: 3, 3
NOTICE: 4, 4
NOTICE: 5, 5
NOTICE: 6, 6
NOTICE: 7, 7
NOTICE: 8, 8
NOTICE: 9, 9
NOTICE: 10, 10
forc01
--------
(1 row)
select * from forc_test;
i | j
------+----
100 | 2
200 | 4
300 | 6
400 | 8
500 | 10
600 | 12
700 | 14
800 | 16
900 | 18
1000 | 20
(10 rows)
-- same, with a cursor whose portal name doesn't match variable name
create or replace function forc01() returns void as $$
declare
c refcursor := 'fooled_ya';
r record;
begin
open c for select * from forc_test;
loop
fetch c into r;
exit when not found;
raise notice '%, %', r.i, r.j;
update forc_test set i = i * 100, j = r.j * 2 where current of c;
end loop;
end;
$$ language plpgsql;
select forc01();
NOTICE: 100, 2
NOTICE: 200, 4
NOTICE: 300, 6
NOTICE: 400, 8
NOTICE: 500, 10
NOTICE: 600, 12
NOTICE: 700, 14
NOTICE: 800, 16
NOTICE: 900, 18
NOTICE: 1000, 20
forc01
--------
(1 row)
select * from forc_test;
i | j
--------+----
10000 | 4
20000 | 8
30000 | 12
40000 | 16
50000 | 20
60000 | 24
70000 | 28
80000 | 32
90000 | 36
100000 | 40
(10 rows)
drop function forc01();
-- fail because cursor has no query bound to it
create or replace function forc_bad() returns void as $$
declare
c refcursor;
begin
for r in c loop
raise notice '%', r.i;
end loop;
end;
$$ language plpgsql;
ERROR: cursor FOR loop must use a bound cursor variable
LINE 5: for r in c loop
^
-- test RETURN QUERY EXECUTE
create or replace function return_dquery()
returns setof int as $$
begin
return query execute 'select * from (values(10),(20)) f';
return query execute 'select * from (values($1),($2)) f' using 40,50;
end;
$$ language plpgsql;
select * from return_dquery();
return_dquery
---------------
10
20
40
50
(4 rows)
drop function return_dquery();
-- test RETURN QUERY with dropped columns
create table tabwithcols(a int, b int, c int, d int);
insert into tabwithcols values(10,20,30,40),(50,60,70,80);
create or replace function returnqueryf()
returns setof tabwithcols as $$
begin
return query select * from tabwithcols;
return query execute 'select * from tabwithcols';
end;
$$ language plpgsql;
select * from returnqueryf();
a | b | c | d
----+----+----+----
10 | 20 | 30 | 40
50 | 60 | 70 | 80
10 | 20 | 30 | 40
50 | 60 | 70 | 80
(4 rows)
alter table tabwithcols drop column b;
select * from returnqueryf();
a | c | d
----+----+----
10 | 30 | 40
50 | 70 | 80
10 | 30 | 40
50 | 70 | 80
(4 rows)
alter table tabwithcols drop column d;
select * from returnqueryf();
a | c
----+----
10 | 30
50 | 70
10 | 30
50 | 70
(4 rows)
alter table tabwithcols add column d int;
select * from returnqueryf();
a | c | d
----+----+---
10 | 30 |
50 | 70 |
10 | 30 |
50 | 70 |
(4 rows)
drop function returnqueryf();
drop table tabwithcols;
-- Tests for 8.4's new RAISE features
create or replace function raise_test() returns void as $$
begin
raise notice '% % %', 1, 2, 3
using errcode = '55001', detail = 'some detail info', hint = 'some hint';
raise '% % %', 1, 2, 3
using errcode = 'division_by_zero', detail = 'some detail info';
end;
$$ language plpgsql;
select raise_test();
NOTICE: 1 2 3
DETAIL: some detail info
HINT: some hint
ERROR: 1 2 3
DETAIL: some detail info
-- Since we can't actually see the thrown SQLSTATE in default psql output,
-- test it like this; this also tests re-RAISE
create or replace function raise_test() returns void as $$
begin
raise 'check me'
using errcode = 'division_by_zero', detail = 'some detail info';
exception
when others then
raise notice 'SQLSTATE: % SQLERRM: %', sqlstate, sqlerrm;
raise;
end;
$$ language plpgsql;
select raise_test();
NOTICE: SQLSTATE: 22012 SQLERRM: check me
ERROR: check me
DETAIL: some detail info
create or replace function raise_test() returns void as $$
begin
raise 'check me'
using errcode = '1234F', detail = 'some detail info';
exception
when others then
raise notice 'SQLSTATE: % SQLERRM: %', sqlstate, sqlerrm;
raise;
end;
$$ language plpgsql;
select raise_test();
NOTICE: SQLSTATE: 1234F SQLERRM: check me
ERROR: check me
DETAIL: some detail info
-- SQLSTATE specification in WHEN
create or replace function raise_test() returns void as $$
begin
raise 'check me'
using errcode = '1234F', detail = 'some detail info';
exception
when sqlstate '1234F' then
raise notice 'SQLSTATE: % SQLERRM: %', sqlstate, sqlerrm;
raise;
end;
$$ language plpgsql;
select raise_test();
NOTICE: SQLSTATE: 1234F SQLERRM: check me
ERROR: check me
DETAIL: some detail info
create or replace function raise_test() returns void as $$
begin
raise division_by_zero using detail = 'some detail info';
exception
when others then
raise notice 'SQLSTATE: % SQLERRM: %', sqlstate, sqlerrm;
raise;
end;
$$ language plpgsql;
select raise_test();
NOTICE: SQLSTATE: 22012 SQLERRM: division_by_zero
ERROR: division_by_zero
DETAIL: some detail info
create or replace function raise_test() returns void as $$
begin
raise division_by_zero;
end;
$$ language plpgsql;
select raise_test();
ERROR: division_by_zero
create or replace function raise_test() returns void as $$
begin
raise sqlstate '1234F';
end;
$$ language plpgsql;
select raise_test();
ERROR: 1234F
create or replace function raise_test() returns void as $$
begin
raise division_by_zero using message = 'custom' || ' message';
end;
$$ language plpgsql;
select raise_test();
ERROR: custom message
create or replace function raise_test() returns void as $$
begin
raise using message = 'custom' || ' message', errcode = '22012';
end;
$$ language plpgsql;
select raise_test();
ERROR: custom message
-- conflict on message
create or replace function raise_test() returns void as $$
begin
raise notice 'some message' using message = 'custom' || ' message', errcode = '22012';
end;
$$ language plpgsql;
select raise_test();
ERROR: RAISE option already specified: MESSAGE
CONTEXT: PL/pgSQL function "raise_test" line 3 at RAISE
-- conflict on errcode
create or replace function raise_test() returns void as $$
begin
raise division_by_zero using message = 'custom' || ' message', errcode = '22012';
end;
$$ language plpgsql;
select raise_test();
ERROR: RAISE option already specified: ERRCODE
CONTEXT: PL/pgSQL function "raise_test" line 3 at RAISE
-- nothing to re-RAISE
create or replace function raise_test() returns void as $$
begin
raise;
end;
$$ language plpgsql;
select raise_test();
ERROR: RAISE without parameters cannot be used outside an exception handler
CONTEXT: PL/pgSQL function "raise_test" line 3 at RAISE
-- check cases where implicit SQLSTATE variable could be confused with
-- SQLSTATE as a keyword, cf bug #5524
create or replace function raise_test() returns void as $$
begin
perform 1/0;
exception
when sqlstate '22012' then
raise notice using message = sqlstate;
raise sqlstate '22012' using message = 'substitute message';
end;
$$ language plpgsql;
select raise_test();
NOTICE: 22012
ERROR: substitute message
drop function raise_test();
-- test CASE statement
create or replace function case_test(bigint) returns text as $$
declare a int = 10;
b int = 1;
begin
case $1
when 1 then
return 'one';
when 2 then
return 'two';
when 3,4,3+5 then
return 'three, four or eight';
when a then
return 'ten';
when a+b, a+b+1 then
return 'eleven, twelve';
end case;
end;
$$ language plpgsql immutable;
select case_test(1);
case_test
-----------
one
(1 row)
select case_test(2);
case_test
-----------
two
(1 row)
select case_test(3);
case_test
----------------------
three, four or eight
(1 row)
select case_test(4);
case_test
----------------------
three, four or eight
(1 row)
select case_test(5); -- fails
ERROR: case not found
HINT: CASE statement is missing ELSE part.
CONTEXT: PL/pgSQL function "case_test" line 5 at CASE
select case_test(8);
case_test
----------------------
three, four or eight
(1 row)
select case_test(10);
case_test
-----------
ten
(1 row)
select case_test(11);
case_test
----------------
eleven, twelve
(1 row)
select case_test(12);
case_test
----------------
eleven, twelve
(1 row)
select case_test(13); -- fails
ERROR: case not found
HINT: CASE statement is missing ELSE part.
CONTEXT: PL/pgSQL function "case_test" line 5 at CASE
create or replace function catch() returns void as $$
begin
raise notice '%', case_test(6);
exception
when case_not_found then
raise notice 'caught case_not_found % %', SQLSTATE, SQLERRM;
end
$$ language plpgsql;
select catch();
NOTICE: caught case_not_found 20000 case not found
catch
-------
(1 row)
-- test the searched variant too, as well as ELSE
create or replace function case_test(bigint) returns text as $$
declare a int = 10;
begin
case
when $1 = 1 then
return 'one';
when $1 = a + 2 then
return 'twelve';
else
return 'other';
end case;
end;
$$ language plpgsql immutable;
select case_test(1);
case_test
-----------
one
(1 row)
select case_test(2);
case_test
-----------
other
(1 row)
select case_test(12);
case_test
-----------
twelve
(1 row)
select case_test(13);
case_test
-----------
other
(1 row)
drop function catch();
drop function case_test(bigint);
-- test variadic functions
create or replace function vari(variadic int[])
returns void as $$
begin
for i in array_lower($1,1)..array_upper($1,1) loop
raise notice '%', $1[i];
end loop; end;
$$ language plpgsql;
select vari(1,2,3,4,5);
NOTICE: 1
NOTICE: 2
NOTICE: 3
NOTICE: 4
NOTICE: 5
vari
------
(1 row)
select vari(3,4,5);
NOTICE: 3
NOTICE: 4
NOTICE: 5
vari
------
(1 row)
select vari(variadic array[5,6,7]);
NOTICE: 5
NOTICE: 6
NOTICE: 7
vari
------
(1 row)
drop function vari(int[]);
-- coercion test
create or replace function pleast(variadic numeric[])
returns numeric as $$
declare aux numeric = $1[array_lower($1,1)];
begin
for i in array_lower($1,1)+1..array_upper($1,1) loop
if $1[i] < aux then aux := $1[i]; end if;
end loop;
return aux;
end;
$$ language plpgsql immutable strict;
select pleast(10,1,2,3,-16);
pleast
--------
-16
(1 row)
select pleast(10.2,2.2,-1.1);
pleast
--------
-1.1
(1 row)
select pleast(10.2,10, -20);
pleast
--------
-20
(1 row)
select pleast(10,20, -1.0);
pleast
--------
-1.0
(1 row)
-- in case of conflict, non-variadic version is preferred
create or replace function pleast(numeric)
returns numeric as $$
begin
raise notice 'non-variadic function called';
return $1;
end;
$$ language plpgsql immutable strict;
select pleast(10);
NOTICE: non-variadic function called
pleast
--------
10
(1 row)
drop function pleast(numeric[]);
drop function pleast(numeric);
-- test table functions
create function tftest(int) returns table(a int, b int) as $$
begin
return query select $1, $1+i from generate_series(1,5) g(i);
end;
$$ language plpgsql immutable strict;
select * from tftest(10);
a | b
----+----
10 | 11
10 | 12
10 | 13
10 | 14
10 | 15
(5 rows)
create or replace function tftest(a1 int) returns table(a int, b int) as $$
begin
a := a1; b := a1 + 1;
return next;
a := a1 * 10; b := a1 * 10 + 1;
return next;
end;
$$ language plpgsql immutable strict;
select * from tftest(10);
a | b
-----+-----
10 | 11
100 | 101
(2 rows)
drop function tftest(int);
create or replace function rttest()
returns setof int as $$
declare rc int;
begin
return query values(10),(20);
get diagnostics rc = row_count;
raise notice '% %', found, rc;
return query select * from (values(10),(20)) f(a) where false;
get diagnostics rc = row_count;
raise notice '% %', found, rc;
return query execute 'values(10),(20)';
get diagnostics rc = row_count;
raise notice '% %', found, rc;
return query execute 'select * from (values(10),(20)) f(a) where false';
get diagnostics rc = row_count;
raise notice '% %', found, rc;
end;
$$ language plpgsql;
select * from rttest();
NOTICE: t 2
NOTICE: f 0
NOTICE: t 2
NOTICE: f 0
rttest
--------
10
20
10
20
(4 rows)
drop function rttest();
-- Test for proper cleanup at subtransaction exit. This example
-- exposed a bug in PG 8.2.
CREATE FUNCTION leaker_1(fail BOOL) RETURNS INTEGER AS $$
DECLARE
v_var INTEGER;
BEGIN
BEGIN
v_var := (leaker_2(fail)).error_code;
EXCEPTION
WHEN others THEN RETURN 0;
END;
RETURN 1;
END;
$$ LANGUAGE plpgsql;
CREATE FUNCTION leaker_2(fail BOOL, OUT error_code INTEGER, OUT new_id INTEGER)
RETURNS RECORD AS $$
BEGIN
IF fail THEN
RAISE EXCEPTION 'fail ...';
END IF;
error_code := 1;
new_id := 1;
RETURN;
END;
$$ LANGUAGE plpgsql;
SELECT * FROM leaker_1(false);
leaker_1
----------
1
(1 row)
SELECT * FROM leaker_1(true);
leaker_1
----------
0
(1 row)
DROP FUNCTION leaker_1(bool);
DROP FUNCTION leaker_2(bool);
-- Test for appropriate cleanup of non-simple expression evaluations
-- (bug in all versions prior to August 2010)
CREATE FUNCTION nonsimple_expr_test() RETURNS text[] AS $$
DECLARE
arr text[];
lr text;
i integer;
BEGIN
arr := array[array['foo','bar'], array['baz', 'quux']];
lr := 'fool';
i := 1;
-- use sub-SELECTs to make expressions non-simple
arr[(SELECT i)][(SELECT i+1)] := (SELECT lr);
RETURN arr;
END;
$$ LANGUAGE plpgsql;
SELECT nonsimple_expr_test();
nonsimple_expr_test
-------------------------
{{foo,fool},{baz,quux}}
(1 row)
DROP FUNCTION nonsimple_expr_test();
CREATE FUNCTION nonsimple_expr_test() RETURNS integer AS $$
declare
i integer NOT NULL := 0;
begin
begin
i := (SELECT NULL::integer); -- should throw error
exception
WHEN OTHERS THEN
i := (SELECT 1::integer);
end;
return i;
end;
$$ LANGUAGE plpgsql;
SELECT nonsimple_expr_test();
nonsimple_expr_test
---------------------
1
(1 row)
DROP FUNCTION nonsimple_expr_test();
-- Test handling of string literals.
set standard_conforming_strings = off;
create or replace function strtest() returns text as $$
begin
raise notice 'foo\\bar\041baz';
return 'foo\\bar\041baz';
end
$$ language plpgsql;
WARNING: nonstandard use of \\ in a string literal
LINE 3: raise notice 'foo\\bar\041baz';
^
HINT: Use the escape string syntax for backslashes, e.g., E'\\'.
WARNING: nonstandard use of \\ in a string literal
LINE 4: return 'foo\\bar\041baz';
^
HINT: Use the escape string syntax for backslashes, e.g., E'\\'.
WARNING: nonstandard use of \\ in a string literal
LINE 4: return 'foo\\bar\041baz';
^
HINT: Use the escape string syntax for backslashes, e.g., E'\\'.
select strtest();
NOTICE: foo\bar!baz
WARNING: nonstandard use of \\ in a string literal
LINE 1: SELECT 'foo\\bar\041baz'
^
HINT: Use the escape string syntax for backslashes, e.g., E'\\'.
QUERY: SELECT 'foo\\bar\041baz'
CONTEXT: PL/pgSQL function "strtest" line 4 at RETURN
strtest
-------------
foo\bar!baz
(1 row)
create or replace function strtest() returns text as $$
begin
raise notice E'foo\\bar\041baz';
return E'foo\\bar\041baz';
end
$$ language plpgsql;
select strtest();
NOTICE: foo\bar!baz
strtest
-------------
foo\bar!baz
(1 row)
set standard_conforming_strings = on;
create or replace function strtest() returns text as $$
begin
raise notice 'foo\\bar\041baz\';
return 'foo\\bar\041baz\';
end
$$ language plpgsql;
select strtest();
NOTICE: foo\\bar\041baz\
strtest
------------------
foo\\bar\041baz\
(1 row)
create or replace function strtest() returns text as $$
begin
raise notice E'foo\\bar\041baz';
return E'foo\\bar\041baz';
end
$$ language plpgsql;
select strtest();
NOTICE: foo\bar!baz
strtest
-------------
foo\bar!baz
(1 row)
drop function strtest();
-- Test anonymous code blocks.
DO $$
DECLARE r record;
BEGIN
FOR r IN SELECT rtrim(roomno) AS roomno, comment FROM Room ORDER BY roomno
LOOP
RAISE NOTICE '%, %', r.roomno, r.comment;
END LOOP;
END$$;
NOTICE: 001, Entrance
NOTICE: 002, Office
NOTICE: 003, Office
NOTICE: 004, Technical
NOTICE: 101, Office
NOTICE: 102, Conference
NOTICE: 103, Restroom
NOTICE: 104, Technical
NOTICE: 105, Office
NOTICE: 106, Office
-- these are to check syntax error reporting
DO LANGUAGE plpgsql $$begin return 1; end$$;
ERROR: RETURN cannot have a parameter in function returning void
LINE 1: DO LANGUAGE plpgsql $$begin return 1; end$$;
^
DO $$
DECLARE r record;
BEGIN
FOR r IN SELECT rtrim(roomno) AS roomno, foo FROM Room ORDER BY roomno
LOOP
RAISE NOTICE '%, %', r.roomno, r.comment;
END LOOP;
END$$;
ERROR: column "foo" does not exist
LINE 1: SELECT rtrim(roomno) AS roomno, foo FROM Room ORDER BY roomn...
^
QUERY: SELECT rtrim(roomno) AS roomno, foo FROM Room ORDER BY roomno
CONTEXT: PL/pgSQL function "inline_code_block" line 4 at FOR over SELECT rows
-- Check variable scoping -- a var is not available in its own or prior
-- default expressions.
create function scope_test() returns int as $$
declare x int := 42;
begin
declare y int := x + 1;
x int := x + 2;
begin
return x * 100 + y;
end;
end;
$$ language plpgsql;
select scope_test();
scope_test
------------
4443
(1 row)
drop function scope_test();
-- Check handling of conflicts between plpgsql vars and table columns.
set plpgsql.variable_conflict = error;
create function conflict_test() returns setof int8_tbl as $$
declare r record;
q1 bigint := 42;
begin
for r in select q1,q2 from int8_tbl loop
return next r;
end loop;
end;
$$ language plpgsql;
select * from conflict_test();
ERROR: column reference "q1" is ambiguous
LINE 1: select q1,q2 from int8_tbl
^
DETAIL: It could refer to either a PL/pgSQL variable or a table column.
QUERY: select q1,q2 from int8_tbl
CONTEXT: PL/pgSQL function "conflict_test" line 5 at FOR over SELECT rows
create or replace function conflict_test() returns setof int8_tbl as $$
#variable_conflict use_variable
declare r record;
q1 bigint := 42;
begin
for r in select q1,q2 from int8_tbl loop
return next r;
end loop;
end;
$$ language plpgsql;
select * from conflict_test();
q1 | q2
----+-------------------
42 | 456
42 | 4567890123456789
42 | 123
42 | 4567890123456789
42 | -4567890123456789
(5 rows)
create or replace function conflict_test() returns setof int8_tbl as $$
#variable_conflict use_column
declare r record;
q1 bigint := 42;
begin
for r in select q1,q2 from int8_tbl loop
return next r;
end loop;
end;
$$ language plpgsql;
select * from conflict_test();
q1 | q2
------------------+-------------------
123 | 456
123 | 4567890123456789
4567890123456789 | 123
4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789
(5 rows)
drop function conflict_test();
-- Check that an unreserved keyword can be used as a variable name
create function unreserved_test() returns int as $$
declare
forward int := 21;
begin
forward := forward * 2;
return forward;
end
$$ language plpgsql;
select unreserved_test();
unreserved_test
-----------------
42
(1 row)
drop function unreserved_test();
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