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postgresql/src/test/regress/sql/plpgsql.sql

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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';
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;
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
update PSlot set backlink = 'WS.001.2a' where slotname = 'PS.base.a3';
select * from WSlot where roomno = '001' order by slotname;
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
update PSlot set backlink = 'WS.001.1b' where slotname = 'PS.base.a2';
select * from WSlot where roomno = '001' order by slotname;
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
--
-- 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;
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
update WSlot set backlink = 'PS.base.a6' where slotname = 'WS.001.3b';
select * from WSlot where roomno = '001' order by slotname;
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
update WSlot set backlink = 'PS.base.a5' where slotname = 'WS.001.3a';
select * from WSlot where roomno = '001' order by slotname;
select * from PSlot where slotname ~ 'PS.base.a' order by slotname;
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;
select * from WSlot order by slotname;
--
-- Install the central phone system and create the phone numbers.
-- They are wired 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;
select * from PField_v1 where pfname = 'PF0_2' order by slotname;
--
-- Finally we want errors
--
insert into PField values ('PF1_1', 'should fail due to unique index');
update PSlot set backlink = 'WS.not.there' where slotname = 'PS.base.a1';
update PSlot set backlink = 'XX.illegal' where slotname = 'PS.base.a1';
update PSlot set slotlink = 'PS.not.there' where slotname = 'PS.base.a1';
update PSlot set slotlink = 'XX.illegal' where slotname = 'PS.base.a1';
insert into HSlot values ('HS', 'base.hub1', 1, '');
insert into HSlot values ('HS', 'base.hub1', 20, '');
delete from HSlot;
insert into IFace values ('IF', 'notthere', 'eth0', '');
insert into IFace values ('IF', 'orion', 'ethernet_interface_name_too_long', '');
--
-- 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);
--
-- 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();
select * from found_test_tbl;
--
-- 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();
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();
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);
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);
SELECT * FROM test_ret_set_rec_dyn(5) AS (a int, b numeric, c text);
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);
SELECT * FROM test_ret_rec_dyn(5) AS (a int, b numeric, c text);
--
-- Test some simple polymorphism cases.
--
create function f1(x anyelement) returns anyelement as $$
begin
return x + 1;
end$$ language plpgsql;
select f1(42) as int, f1(4.5) as num;
select f1(point(3,4)); -- fail for lack of + operator
drop function f1(x anyelement);
create function f1(x anyelement) returns anyarray as $$
begin
return array[x + 1, x + 2];
end$$ language plpgsql;
select f1(42) as int, f1(4.5) as num;
drop function f1(x anyelement);
create function f1(x anyarray) returns anyelement as $$
begin
return x[1];
end$$ language plpgsql;
select f1(array[2,4]) as int, f1(array[4.5, 7.7]) as num;
select f1(stavalues1) from pg_statistic; -- fail, can't infer element type
drop function f1(x anyarray);
create function f1(x anyarray) returns anyarray as $$
begin
return x;
end$$ language plpgsql;
select f1(array[2,4]) as int, f1(array[4.5, 7.7]) as num;
select f1(stavalues1) from pg_statistic; -- fail, can't infer element type
drop function f1(x anyarray);
-- fail, can't infer type:
create function f1(x anyelement) returns anyrange as $$
begin
return array[x + 1, x + 2];
end$$ language plpgsql;
create function f1(x anyrange) returns anyarray as $$
begin
return array[lower(x), upper(x)];
end$$ language plpgsql;
select f1(int4range(42, 49)) as int, f1(float8range(4.5, 7.8)) as num;
drop function f1(x anyrange);
create function f1(x anycompatible, y anycompatible) returns anycompatiblearray as $$
begin
return array[x, y];
end$$ language plpgsql;
select f1(2, 4) as int, f1(2, 4.5) as num;
drop function f1(x anycompatible, y anycompatible);
create function f1(x anycompatiblerange, y anycompatible, z anycompatible) returns anycompatiblearray as $$
begin
return array[lower(x), upper(x), y, z];
end$$ language plpgsql;
select f1(int4range(42, 49), 11, 2::smallint) as int, f1(float8range(4.5, 7.8), 7.8, 11::real) as num;
select f1(int4range(42, 49), 11, 4.5) as fail; -- range type doesn't fit
drop function f1(x anycompatiblerange, y anycompatible, z anycompatible);
-- fail, can't infer type:
create function f1(x anycompatible) returns anycompatiblerange as $$
begin
return array[x + 1, x + 2];
end$$ language plpgsql;
create function f1(x anycompatiblerange, y anycompatiblearray) returns anycompatiblerange as $$
begin
return x;
end$$ language plpgsql;
select f1(int4range(42, 49), array[11]) as int, f1(float8range(4.5, 7.8), array[7]) as num;
drop function f1(x anycompatiblerange, y anycompatiblearray);
create function f1(a anyelement, b anyarray,
c anycompatible, d anycompatible,
OUT x anyarray, OUT y anycompatiblearray)
as $$
begin
x := a || b;
y := array[c, d];
end$$ language plpgsql;
select x, pg_typeof(x), y, pg_typeof(y)
from f1(11, array[1, 2], 42, 34.5);
select x, pg_typeof(x), y, pg_typeof(y)
from f1(11, array[1, 2], point(1,2), point(3,4));
select x, pg_typeof(x), y, pg_typeof(y)
from f1(11, '{1,2}', point(1,2), '(3,4)');
select x, pg_typeof(x), y, pg_typeof(y)
from f1(11, array[1, 2.2], 42, 34.5); -- fail
drop function f1(a anyelement, b anyarray,
c anycompatible, d anycompatible);
--
-- 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;
create function f1(in i int, out j int) as $$
begin
j := i+1;
return;
end$$ language plpgsql;
select f1(42);
select * from f1(42);
create or replace function f1(inout i int) as $$
begin
i := i+1;
end$$ language plpgsql;
select f1(42);
select * from f1(42);
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);
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);
select * from f1(42);
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);
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);
select * from duplic('foo'::text);
drop function duplic(anyelement);
create function duplic(in i anycompatiblerange, out j anycompatible, out k anycompatiblearray) as $$
begin
j := lower(i);
k := array[lower(i),upper(i)];
return;
end$$ language plpgsql;
select * from duplic(int4range(42,49));
select * from duplic(textrange('aaa', 'bbb'));
drop function duplic(anycompatiblerange);
--
-- test PERFORM
--
create table perform_test (
a INT,
b INT
);
create function perform_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 perform_simple_func(5);
IF FOUND then
INSERT INTO perform_test VALUES (100, 100);
END IF;
PERFORM perform_simple_func(50);
IF FOUND then
INSERT INTO perform_test VALUES (100, 100);
END IF;
RETURN;
END;' language plpgsql;
SELECT perform_test_func();
SELECT * FROM perform_test;
drop table perform_test;
--
-- Test proper snapshot handling in simple expressions
--
create temp table users(login text, id serial);
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');
select sp_id_user('userx');
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');
select sp_add_user('user2');
select sp_add_user('user2');
select sp_add_user('user3');
select sp_add_user('user3');
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;
5 10
50 100
500 1000
\.
create function return_unnamed_refcursor() returns refcursor as $$
declare
rc refcursor;
begin
open rc for select a from rc_test;
return rc;
end
$$ language plpgsql;
create function use_refcursor(rc refcursor) returns int as $$
declare
rc refcursor;
x record;
begin
rc := return_unnamed_refcursor();
fetch next from rc into x;
return x.a;
end
$$ language plpgsql;
select use_refcursor(return_unnamed_refcursor());
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');
fetch next in test1;
select refcursor_test1('test2');
fetch all from test2;
commit;
-- should fail
fetch next from test1;
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 fail
create function constant_refcursor() returns refcursor as $$
declare
rc constant refcursor;
begin
open rc for select a from rc_test;
return rc;
end
$$ language plpgsql;
select constant_refcursor();
-- but it's okay like this
create or replace function constant_refcursor() returns refcursor as $$
declare
rc constant refcursor := 'my_cursor_name';
begin
open rc for select a from rc_test;
return rc;
end
$$ language plpgsql;
select constant_refcursor();
--
-- tests for cursors with named parameter arguments
--
create function namedparmcursor_test1(int, int) returns boolean as $$
declare
c1 cursor (param1 int, param12 int) for select * from rc_test where a > param1 and b > param12;
nonsense record;
begin
open c1(param12 := $2, param1 := $1);
fetch c1 into nonsense;
close c1;
if found then
return true;
else
return false;
end if;
end
$$ language plpgsql;
select namedparmcursor_test1(20000, 20000) as "Should be false",
namedparmcursor_test1(20, 20) as "Should be true";
-- mixing named and positional argument notations
create function namedparmcursor_test2(int, int) returns boolean as $$
declare
c1 cursor (param1 int, param2 int) for select * from rc_test where a > param1 and b > param2;
nonsense record;
begin
open c1(param1 := $1, $2);
fetch c1 into nonsense;
close c1;
if found then
return true;
else
return false;
end if;
end
$$ language plpgsql;
select namedparmcursor_test2(20, 20);
-- mixing named and positional: param2 is given twice, once in named notation
-- and second time in positional notation. Should throw an error at parse time
create function namedparmcursor_test3() returns void as $$
declare
c1 cursor (param1 int, param2 int) for select * from rc_test where a > param1 and b > param2;
begin
open c1(param2 := 20, 21);
end
$$ language plpgsql;
-- mixing named and positional: same as previous test, but param1 is duplicated
create function namedparmcursor_test4() returns void as $$
declare
c1 cursor (param1 int, param2 int) for select * from rc_test where a > param1 and b > param2;
begin
open c1(20, param1 := 21);
end
$$ language plpgsql;
-- duplicate named parameter, should throw an error at parse time
create function namedparmcursor_test5() returns void as $$
declare
c1 cursor (p1 int, p2 int) for
select * from tenk1 where thousand = p1 and tenthous = p2;
begin
open c1 (p2 := 77, p2 := 42);
end
$$ language plpgsql;
-- not enough parameters, should throw an error at parse time
create function namedparmcursor_test6() returns void as $$
declare
c1 cursor (p1 int, p2 int) for
select * from tenk1 where thousand = p1 and tenthous = p2;
begin
open c1 (p2 := 77);
end
$$ language plpgsql;
-- division by zero runtime error, the context given in the error message
-- should be sensible
create function namedparmcursor_test7() returns void as $$
declare
c1 cursor (p1 int, p2 int) for
select * from tenk1 where thousand = p1 and tenthous = p2;
begin
open c1 (p2 := 77, p1 := 42/0);
end $$ language plpgsql;
select namedparmcursor_test7();
-- check that line comments work correctly within the argument list (there
-- is some special handling of this case in the code: the newline after the
-- comment must be preserved when the argument-evaluating query is
-- constructed, otherwise the comment effectively comments out the next
-- argument, too)
create function namedparmcursor_test8() returns int4 as $$
declare
c1 cursor (p1 int, p2 int) for
select count(*) from tenk1 where thousand = p1 and tenthous = p2;
n int4;
begin
open c1 (77 -- test
, 42);
fetch c1 into n;
return n;
end $$ language plpgsql;
select namedparmcursor_test8();
-- cursor parameter name can match plpgsql variable or unreserved keyword
create function namedparmcursor_test9(p1 int) returns int4 as $$
declare
c1 cursor (p1 int, p2 int, debug int) for
select count(*) from tenk1 where thousand = p1 and tenthous = p2
and four = debug;
p2 int4 := 1006;
n int4;
begin
open c1 (p1 := p1, p2 := p2, debug := 2);
fetch c1 into n;
return n;
end $$ language plpgsql;
select namedparmcursor_test9(6);
--
-- 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;
create function raise_test2(int) returns int as $$
begin
raise notice 'This message has too few parameters: %, %, %', $1, $1;
return $1;
end;
$$ language plpgsql;
create function raise_test3(int) returns int as $$
begin
raise notice 'This message has no parameters (despite having %% signs in it)!';
return $1;
end;
$$ language plpgsql;
select raise_test3(1);
-- 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();
--
-- 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;
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;
-- 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;
create function void_return_expr() returns void as $$
begin
return 5;
end;$$ language plpgsql;
-- 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();
-- but ordinary functions are not
create function missing_return_expr() returns int as $$
begin
perform 2+2;
end;$$ language plpgsql;
select 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');
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();
create function excpt_test2() returns void as $$
begin
begin
begin
raise notice '% %', sqlstate, sqlerrm;
end;
end;
end; $$ language plpgsql;
-- should fail
select excpt_test2();
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();
create function excpt_test4() returns text as $$
begin
begin perform 1/0;
exception when others then return sqlerrm; end;
end; $$ language plpgsql;
select excpt_test4();
drop function excpt_test1();
drop function excpt_test2();
drop function excpt_test3();
drop function excpt_test4();
-- 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();
drop function raise_exprs();
-- 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);
--
-- 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 stricttest() 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 stricttest();
create or replace function stricttest() 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 stricttest();
create or replace function stricttest() 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 stricttest();
create or replace function stricttest() 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 stricttest();
select * from foo;
create or replace function stricttest() 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 stricttest();
create or replace function stricttest() 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 stricttest();
create or replace function stricttest() 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 stricttest();
create or replace function stricttest() 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 stricttest();
create or replace function stricttest() 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 stricttest();
create or replace function stricttest() 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 stricttest();
drop function stricttest();
-- test printing parameters after failure due to STRICT
set plpgsql.print_strict_params to true;
create or replace function stricttest() returns void as $$
declare
x record;
p1 int := 2;
p3 text := 'foo';
begin
-- no rows
select * from foo where f1 = p1 and f1::text = p3 into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select stricttest();
create or replace function stricttest() returns void as $$
declare
x record;
p1 int := 2;
p3 text := $a$'Valame Dios!' dijo Sancho; 'no le dije yo a vuestra merced que mirase bien lo que hacia?'$a$;
begin
-- no rows
select * from foo where f1 = p1 and f1::text = p3 into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select stricttest();
create or replace function stricttest() returns void as $$
declare
x record;
p1 int := 2;
p3 text := 'foo';
begin
-- too many rows
select * from foo where f1 > p1 or f1::text = p3 into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select stricttest();
create or replace function stricttest() returns void as $$
declare x record;
begin
-- too many rows, no params
select * from foo where f1 > 3 into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select stricttest();
create or replace function stricttest() returns void as $$
declare x record;
begin
-- no rows
execute 'select * from foo where f1 = $1 or f1::text = $2' using 0, 'foo' into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select stricttest();
create or replace function stricttest() returns void as $$
declare x record;
begin
-- too many rows
execute 'select * from foo where f1 > $1' using 1 into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select stricttest();
create or replace function stricttest() returns void as $$
declare x record;
begin
-- too many rows, no parameters
execute 'select * from foo where f1 > 3' into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select stricttest();
create or replace function stricttest() returns void as $$
-- override the global
#print_strict_params off
declare
x record;
p1 int := 2;
p3 text := 'foo';
begin
-- too many rows
select * from foo where f1 > p1 or f1::text = p3 into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select stricttest();
reset plpgsql.print_strict_params;
create or replace function stricttest() returns void as $$
-- override the global
#print_strict_params on
declare
x record;
p1 int := 2;
p3 text := 'foo';
begin
-- too many rows
select * from foo where f1 > p1 or f1::text = p3 into strict x;
raise notice 'x.f1 = %, x.f2 = %', x.f1, x.f2;
end$$ language plpgsql;
select stricttest();
-- test warnings and errors
set plpgsql.extra_warnings to 'all';
set plpgsql.extra_warnings to 'none';
set plpgsql.extra_errors to 'all';
set plpgsql.extra_errors to 'none';
-- test warnings when shadowing a variable
set plpgsql.extra_warnings to 'shadowed_variables';
-- simple shadowing of input and output parameters
create or replace function shadowtest(in1 int)
returns table (out1 int) as $$
declare
in1 int;
out1 int;
begin
end
$$ language plpgsql;
select shadowtest(1);
set plpgsql.extra_warnings to 'shadowed_variables';
select shadowtest(1);
create or replace function shadowtest(in1 int)
returns table (out1 int) as $$
declare
in1 int;
out1 int;
begin
end
$$ language plpgsql;
select shadowtest(1);
drop function shadowtest(int);
-- shadowing in a second DECLARE block
create or replace function shadowtest()
returns void as $$
declare
f1 int;
begin
declare
f1 int;
begin
end;
end$$ language plpgsql;
drop function shadowtest();
-- several levels of shadowing
create or replace function shadowtest(in1 int)
returns void as $$
declare
in1 int;
begin
declare
in1 int;
begin
end;
end$$ language plpgsql;
drop function shadowtest(int);
-- shadowing in cursor definitions
create or replace function shadowtest()
returns void as $$
declare
f1 int;
c1 cursor (f1 int) for select 1;
begin
end$$ language plpgsql;
drop function shadowtest();
-- test errors when shadowing a variable
set plpgsql.extra_errors to 'shadowed_variables';
create or replace function shadowtest(f1 int)
returns boolean as $$
declare f1 int; begin return 1; end $$ language plpgsql;
select shadowtest(1);
reset plpgsql.extra_errors;
reset plpgsql.extra_warnings;
create or replace function shadowtest(f1 int)
returns boolean as $$
declare f1 int; begin return 1; end $$ language plpgsql;
select shadowtest(1);
-- runtime extra checks
set plpgsql.extra_warnings to 'too_many_rows';
do $$
declare x int;
begin
select v from generate_series(1,2) g(v) into x;
end;
$$;
set plpgsql.extra_errors to 'too_many_rows';
do $$
declare x int;
begin
select v from generate_series(1,2) g(v) into x;
end;
$$;
reset plpgsql.extra_errors;
reset plpgsql.extra_warnings;
set plpgsql.extra_warnings to 'strict_multi_assignment';
do $$
declare
x int;
y int;
begin
select 1 into x, y;
select 1,2 into x, y;
select 1,2,3 into x, y;
end
$$;
set plpgsql.extra_errors to 'strict_multi_assignment';
do $$
declare
x int;
y int;
begin
select 1 into x, y;
select 1,2 into x, y;
select 1,2,3 into x, y;
end
$$;
create table test_01(a int, b int, c int);
alter table test_01 drop column a;
-- the check is active only when source table is not empty
insert into test_01 values(10,20);
do $$
declare
x int;
y int;
begin
select * from test_01 into x, y; -- should be ok
raise notice 'ok';
select * from test_01 into x; -- should to fail
end;
$$;
do $$
declare
t test_01;
begin
select 1, 2 into t; -- should be ok
raise notice 'ok';
select 1, 2, 3 into t; -- should fail;
end;
$$;
do $$
declare
t test_01;
begin
select 1 into t; -- should fail;
end;
$$;
drop table test_01;
reset plpgsql.extra_errors;
reset plpgsql.extra_warnings;
-- 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();
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
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();
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();
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();
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();
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();
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);
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();
create type record_type as (x text, y int, z boolean);
create or replace function ret_query2(lim int) returns setof record_type as $$
begin
return query select fipshash(s.x::text), s.x, s.x > 0
from generate_series(-8, lim) s (x) where s.x % 2 = 0;
end;
$$ language plpgsql;
select * from ret_query2(8);
-- 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');
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);
drop function exc_using(int);
-- test FOR-over-cursor
create or replace function forc01() returns void as $$
declare
c cursor(r1 integer, r2 integer)
for select * from generate_series(r1,r2) i;
c2 cursor
for select * from generate_series(41,43) i;
begin
-- assign portal names to cursors to get stable output
c := 'c';
c2 := 'c2';
for r in c(5,7) loop
raise notice '% from %', r.i, c;
end loop;
-- again, to test if cursor was closed properly
for r in c(9,10) loop
raise notice '% from %', r.i, c;
end loop;
-- and test a parameterless cursor
for r in c2 loop
raise notice '% from %', r.i, c2;
end loop;
-- and try it with a hand-assigned name
raise notice 'after loop, c2 = %', c2;
c2 := 'special_name';
for r in c2 loop
raise notice '% from %', r.i, c2;
end loop;
raise notice 'after loop, c2 = %', c2;
-- and try it with a generated name
-- (which we can't show in the output because it's variable)
c2 := null;
for r in c2 loop
raise notice '%', r.i;
end loop;
raise notice 'after loop, c2 = %', c2;
return;
end;
$$ language plpgsql;
select forc01();
-- 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();
select * from forc_test;
-- 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();
select * from forc_test;
drop function forc01();
-- it's okay to re-use a cursor variable name, even when bound
do $$
declare cnt int := 0;
c1 cursor for select * from forc_test;
begin
for r1 in c1 loop
declare c1 cursor for select * from forc_test;
begin
for r2 in c1 loop
cnt := cnt + 1;
end loop;
end;
end loop;
raise notice 'cnt = %', cnt;
end $$;
-- 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;
-- 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();
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();
alter table tabwithcols drop column b;
select * from returnqueryf();
alter table tabwithcols drop column d;
select * from returnqueryf();
alter table tabwithcols add column d int;
select * from returnqueryf();
drop function returnqueryf();
drop table tabwithcols;
--
-- Tests for composite-type results
--
create type compostype as (x int, y varchar);
-- test: use of variable of composite type in return statement
create or replace function compos() returns compostype as $$
declare
v compostype;
begin
v := (1, 'hello');
return v;
end;
$$ language plpgsql;
select compos();
-- test: use of variable of record type in return statement
create or replace function compos() returns compostype as $$
declare
v record;
begin
v := (1, 'hello'::varchar);
return v;
end;
$$ language plpgsql;
select compos();
-- test: use of row expr in return statement
create or replace function compos() returns compostype as $$
begin
return (1, 'hello'::varchar);
end;
$$ language plpgsql;
select compos();
-- this does not work currently (no implicit casting)
create or replace function compos() returns compostype as $$
begin
return (1, 'hello');
end;
$$ language plpgsql;
select compos();
-- ... but this does
create or replace function compos() returns compostype as $$
begin
return (1, 'hello')::compostype;
end;
$$ language plpgsql;
select compos();
drop function compos();
-- test: return a row expr as record.
create or replace function composrec() returns record as $$
declare
v record;
begin
v := (1, 'hello');
return v;
end;
$$ language plpgsql;
select composrec();
-- test: return row expr in return statement.
create or replace function composrec() returns record as $$
begin
return (1, 'hello');
end;
$$ language plpgsql;
select composrec();
drop function composrec();
-- test: row expr in RETURN NEXT statement.
create or replace function compos() returns setof compostype as $$
begin
for i in 1..3
loop
return next (1, 'hello'::varchar);
end loop;
return next null::compostype;
return next (2, 'goodbye')::compostype;
end;
$$ language plpgsql;
select * from compos();
drop function compos();
-- test: use invalid expr in return statement.
create or replace function compos() returns compostype as $$
begin
return 1 + 1;
end;
$$ language plpgsql;
select compos();
-- RETURN variable is a different code path ...
create or replace function compos() returns compostype as $$
declare x int := 42;
begin
return x;
end;
$$ language plpgsql;
select * from compos();
drop function compos();
-- test: invalid use of composite variable in scalar-returning function
create or replace function compos() returns int as $$
declare
v compostype;
begin
v := (1, 'hello');
return v;
end;
$$ language plpgsql;
select compos();
-- test: invalid use of composite expression in scalar-returning function
create or replace function compos() returns int as $$
begin
return (1, 'hello')::compostype;
end;
$$ language plpgsql;
select compos();
drop function compos();
drop type compostype;
--
-- 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();
-- 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();
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();
-- 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();
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();
create or replace function raise_test() returns void as $$
begin
raise division_by_zero;
end;
$$ language plpgsql;
select raise_test();
create or replace function raise_test() returns void as $$
begin
raise sqlstate '1234F';
end;
$$ language plpgsql;
select raise_test();
create or replace function raise_test() returns void as $$
begin
raise division_by_zero using message = 'custom' || ' message';
end;
$$ language plpgsql;
select raise_test();
create or replace function raise_test() returns void as $$
begin
raise using message = 'custom' || ' message', errcode = '22012';
end;
$$ language plpgsql;
select raise_test();
-- 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();
-- 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();
-- nothing to re-RAISE
create or replace function raise_test() returns void as $$
begin
raise;
end;
$$ language plpgsql;
select raise_test();
-- test access to exception data
create function zero_divide() returns int as $$
declare v int := 0;
begin
return 10 / v;
end;
$$ language plpgsql parallel safe;
create or replace function raise_test() returns void as $$
begin
raise exception 'custom exception'
using detail = 'some detail of custom exception',
hint = 'some hint related to custom exception';
end;
$$ language plpgsql;
create function stacked_diagnostics_test() returns void as $$
declare _sqlstate text;
_message text;
_context text;
begin
perform zero_divide();
exception when others then
get stacked diagnostics
_sqlstate = returned_sqlstate,
_message = message_text,
_context = pg_exception_context;
raise notice 'sqlstate: %, message: %, context: [%]',
_sqlstate, _message, replace(_context, E'\n', ' <- ');
end;
$$ language plpgsql;
select stacked_diagnostics_test();
create or replace function stacked_diagnostics_test() returns void as $$
declare _detail text;
_hint text;
_message text;
begin
perform raise_test();
exception when others then
get stacked diagnostics
_message = message_text,
_detail = pg_exception_detail,
_hint = pg_exception_hint;
raise notice 'message: %, detail: %, hint: %', _message, _detail, _hint;
end;
$$ language plpgsql;
select stacked_diagnostics_test();
-- fail, cannot use stacked diagnostics statement outside handler
create or replace function stacked_diagnostics_test() returns void as $$
declare _detail text;
_hint text;
_message text;
begin
get stacked diagnostics
_message = message_text,
_detail = pg_exception_detail,
_hint = pg_exception_hint;
raise notice 'message: %, detail: %, hint: %', _message, _detail, _hint;
end;
$$ language plpgsql;
select stacked_diagnostics_test();
drop function stacked_diagnostics_test();
-- Test that an error recovery subtransaction is parallel safe
create function error_trap_test() returns text as $$
begin
perform zero_divide();
return 'no error detected!';
exception when division_by_zero then
return 'division_by_zero detected';
end;
$$ language plpgsql parallel safe;
set debug_parallel_query to on;
explain (verbose, costs off) select error_trap_test();
select error_trap_test();
reset debug_parallel_query;
drop function error_trap_test();
drop function zero_divide();
-- 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();
drop function raise_test();
-- test passing column_name, constraint_name, datatype_name, table_name
-- and schema_name error fields
create or replace function stacked_diagnostics_test() returns void as $$
declare _column_name text;
_constraint_name text;
_datatype_name text;
_table_name text;
_schema_name text;
begin
raise exception using
column = '>>some column name<<',
constraint = '>>some constraint name<<',
datatype = '>>some datatype name<<',
table = '>>some table name<<',
schema = '>>some schema name<<';
exception when others then
get stacked diagnostics
_column_name = column_name,
_constraint_name = constraint_name,
_datatype_name = pg_datatype_name,
_table_name = table_name,
_schema_name = schema_name;
raise notice 'column %, constraint %, type %, table %, schema %',
_column_name, _constraint_name, _datatype_name, _table_name, _schema_name;
end;
$$ language plpgsql;
select stacked_diagnostics_test();
drop function stacked_diagnostics_test();
-- 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);
select vari(3,4,5);
select vari(variadic array[5,6,7]);
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);
select pleast(10.2,2.2,-1.1);
select pleast(10.2,10, -20);
select pleast(10,20, -1.0);
-- 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);
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);
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);
drop function tftest(int);
create 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();
-- check some error cases, too
create or replace function rttest()
returns setof int as $$
begin
return query select 10 into no_such_table;
end;
$$ language plpgsql;
select * from rttest();
create or replace function rttest()
returns setof int as $$
begin
return query execute 'select 10 into no_such_table';
end;
$$ language plpgsql;
select * from rttest();
select * from no_such_table;
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);
SELECT * FROM leaker_1(true);
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();
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();
DROP FUNCTION nonsimple_expr_test();
--
-- Test cases involving recursion and error recovery in simple expressions
-- (bugs in all versions before October 2010). The problems are most
-- easily exposed by mutual recursion between plpgsql and sql functions.
--
create function recurse(float8) returns float8 as
$$
begin
if ($1 > 0) then
return sql_recurse($1 - 1);
else
return $1;
end if;
end;
$$ language plpgsql;
-- "limit" is to prevent this from being inlined
create function sql_recurse(float8) returns float8 as
$$ select recurse($1) limit 1; $$ language sql;
select recurse(10);
create function error1(text) returns text language sql as
$$ SELECT relname::text FROM pg_class c WHERE c.oid = $1::regclass $$;
create function error2(p_name_table text) returns text language plpgsql as $$
begin
return error1(p_name_table);
end$$;
BEGIN;
create table public.stuffs (stuff text);
SAVEPOINT a;
select error2('nonexistent.stuffs');
ROLLBACK TO a;
select error2('public.stuffs');
rollback;
drop function error2(p_name_table text);
drop function error1(text);
-- Test for proper handling of cast-expression caching
create function sql_to_date(integer) returns date as $$
select $1::text::date
$$ language sql immutable strict;
create cast (integer as date) with function sql_to_date(integer) as assignment;
create function cast_invoker(integer) returns date as $$
begin
return $1;
end$$ language plpgsql;
select cast_invoker(20150717);
select cast_invoker(20150718); -- second call crashed in pre-release 9.5
begin;
select cast_invoker(20150717);
select cast_invoker(20150718);
savepoint s1;
select cast_invoker(20150718);
select cast_invoker(-1); -- fails
rollback to savepoint s1;
select cast_invoker(20150719);
select cast_invoker(20150720);
commit;
drop function cast_invoker(integer);
drop function sql_to_date(integer) cascade;
-- Test handling of cast cache inside DO blocks
-- (to check the original crash case, this must be a cast not previously
-- used in this session)
begin;
do $$ declare x text[]; begin x := '{1.23, 4.56}'::numeric[]; end $$;
do $$ declare x text[]; begin x := '{1.23, 4.56}'::numeric[]; end $$;
end;
-- Test for consistent reporting of error context
create function fail() returns int language plpgsql as $$
begin
return 1/0;
end
$$;
select fail();
select fail();
drop function fail();
-- 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;
select strtest();
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();
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();
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();
drop function strtest();
-- Test anonymous code blocks.
DO $$
DECLARE r record;
BEGIN
FOR r IN SELECT rtrim(roomno) AS roomno, comment FROM Room ORDER BY roomno
LOOP
RAISE NOTICE '%, %', r.roomno, r.comment;
END LOOP;
END$$;
-- these are to check syntax error reporting
DO LANGUAGE plpgsql $$begin return 1; end$$;
DO $$
DECLARE r record;
BEGIN
FOR r IN SELECT rtrim(roomno) AS roomno, foo FROM Room ORDER BY roomno
LOOP
RAISE NOTICE '%, %', r.roomno, r.comment;
END LOOP;
END$$;
-- Check handling of errors thrown from/into anonymous code blocks.
do $outer$
begin
for i in 1..10 loop
begin
execute $ex$
do $$
declare x int = 0;
begin
x := 1 / x;
end;
$$;
$ex$;
exception when division_by_zero then
raise notice 'caught division by zero';
end;
end loop;
end;
$outer$;
-- Check variable scoping -- a var is not available in its own or prior
-- default expressions, but it is available in later ones.
do $$
declare x int := x + 1; -- error
begin
raise notice 'x = %', x;
end;
$$;
do $$
declare y int := x + 1; -- error
x int := 42;
begin
raise notice 'x = %, y = %', x, y;
end;
$$;
do $$
declare x int := 42;
y int := x + 1;
begin
raise notice 'x = %, y = %', x, y;
end;
$$;
do $$
declare x int := 42;
begin
declare y int := x + 1;
x int := x + 2;
z int := x * 10;
begin
raise notice 'x = %, y = %, z = %', x, y, z;
end;
end;
$$;
-- 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();
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();
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();
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();
create or replace function unreserved_test() returns int as $$
declare
return int := 42;
begin
return := return + 1;
return return;
end
$$ language plpgsql;
select unreserved_test();
create or replace function unreserved_test() returns int as $$
declare
comment int := 21;
begin
comment := comment * 2;
comment on function unreserved_test() is 'this is a test';
return comment;
end
$$ language plpgsql;
select unreserved_test();
select obj_description('unreserved_test()'::regprocedure, 'pg_proc');
drop function unreserved_test();
--
-- Test FOREACH over arrays
--
create function foreach_test(anyarray)
returns void as $$
declare x int;
begin
foreach x in array $1
loop
raise notice '%', x;
end loop;
end;
$$ language plpgsql;
select foreach_test(ARRAY[1,2,3,4]);
select foreach_test(ARRAY[[1,2],[3,4]]);
create or replace function foreach_test(anyarray)
returns void as $$
declare x int;
begin
foreach x slice 1 in array $1
loop
raise notice '%', x;
end loop;
end;
$$ language plpgsql;
-- should fail
select foreach_test(ARRAY[1,2,3,4]);
select foreach_test(ARRAY[[1,2],[3,4]]);
create or replace function foreach_test(anyarray)
returns void as $$
declare x int[];
begin
foreach x slice 1 in array $1
loop
raise notice '%', x;
end loop;
end;
$$ language plpgsql;
select foreach_test(ARRAY[1,2,3,4]);
select foreach_test(ARRAY[[1,2],[3,4]]);
-- higher level of slicing
create or replace function foreach_test(anyarray)
returns void as $$
declare x int[];
begin
foreach x slice 2 in array $1
loop
raise notice '%', x;
end loop;
end;
$$ language plpgsql;
-- should fail
select foreach_test(ARRAY[1,2,3,4]);
-- ok
select foreach_test(ARRAY[[1,2],[3,4]]);
select foreach_test(ARRAY[[[1,2]],[[3,4]]]);
create type xy_tuple AS (x int, y int);
-- iteration over array of records
create or replace function foreach_test(anyarray)
returns void as $$
declare r record;
begin
foreach r in array $1
loop
raise notice '%', r;
end loop;
end;
$$ language plpgsql;
select foreach_test(ARRAY[(10,20),(40,69),(35,78)]::xy_tuple[]);
select foreach_test(ARRAY[[(10,20),(40,69)],[(35,78),(88,76)]]::xy_tuple[]);
create or replace function foreach_test(anyarray)
returns void as $$
declare x int; y int;
begin
foreach x, y in array $1
loop
raise notice 'x = %, y = %', x, y;
end loop;
end;
$$ language plpgsql;
select foreach_test(ARRAY[(10,20),(40,69),(35,78)]::xy_tuple[]);
select foreach_test(ARRAY[[(10,20),(40,69)],[(35,78),(88,76)]]::xy_tuple[]);
-- slicing over array of composite types
create or replace function foreach_test(anyarray)
returns void as $$
declare x xy_tuple[];
begin
foreach x slice 1 in array $1
loop
raise notice '%', x;
end loop;
end;
$$ language plpgsql;
select foreach_test(ARRAY[(10,20),(40,69),(35,78)]::xy_tuple[]);
select foreach_test(ARRAY[[(10,20),(40,69)],[(35,78),(88,76)]]::xy_tuple[]);
drop function foreach_test(anyarray);
drop type xy_tuple;
--
-- Assorted tests for array subscript assignment
--
create temp table rtype (id int, ar text[]);
create function arrayassign1() returns text[] language plpgsql as $$
declare
r record;
begin
r := row(12, '{foo,bar,baz}')::rtype;
r.ar[2] := 'replace';
return r.ar;
end$$;
select arrayassign1();
select arrayassign1(); -- try again to exercise internal caching
create domain orderedarray as int[2]
constraint sorted check (value[1] < value[2]);
select '{1,2}'::orderedarray;
select '{2,1}'::orderedarray; -- fail
create function testoa(x1 int, x2 int, x3 int) returns orderedarray
language plpgsql as $$
declare res orderedarray;
begin
res := array[x1, x2];
res[2] := x3;
return res;
end$$;
select testoa(1,2,3);
select testoa(1,2,3); -- try again to exercise internal caching
select testoa(2,1,3); -- fail at initial assign
select testoa(1,2,1); -- fail at update
drop function arrayassign1();
drop function testoa(x1 int, x2 int, x3 int);
--
-- Test handling of expanded arrays
--
create function returns_rw_array(int) returns int[]
language plpgsql as $$
declare r int[];
begin r := array[$1, $1]; return r; end;
$$ stable;
create function consumes_rw_array(int[]) returns int
language plpgsql as $$
begin return $1[1]; end;
$$ stable;
select consumes_rw_array(returns_rw_array(42));
-- bug #14174
explain (verbose, costs off)
select i, a from
(select returns_rw_array(1) as a offset 0) ss,
lateral consumes_rw_array(a) i;
select i, a from
(select returns_rw_array(1) as a offset 0) ss,
lateral consumes_rw_array(a) i;
explain (verbose, costs off)
select consumes_rw_array(a), a from returns_rw_array(1) a;
select consumes_rw_array(a), a from returns_rw_array(1) a;
explain (verbose, costs off)
select consumes_rw_array(a), a from
(values (returns_rw_array(1)), (returns_rw_array(2))) v(a);
select consumes_rw_array(a), a from
(values (returns_rw_array(1)), (returns_rw_array(2))) v(a);
do $$
declare a int[] := array[1,2];
begin
a := a || 3;
raise notice 'a = %', a;
end$$;
--
-- Test access to call stack
--
create function inner_func(int)
returns int as $$
declare _context text;
begin
get diagnostics _context = pg_context;
raise notice '***%***', _context;
-- lets do it again, just for fun..
get diagnostics _context = pg_context;
raise notice '***%***', _context;
raise notice 'lets make sure we didnt break anything';
return 2 * $1;
end;
$$ language plpgsql;
create or replace function outer_func(int)
returns int as $$
declare
myresult int;
begin
raise notice 'calling down into inner_func()';
myresult := inner_func($1);
raise notice 'inner_func() done';
return myresult;
end;
$$ language plpgsql;
create or replace function outer_outer_func(int)
returns int as $$
declare
myresult int;
begin
raise notice 'calling down into outer_func()';
myresult := outer_func($1);
raise notice 'outer_func() done';
return myresult;
end;
$$ language plpgsql;
select outer_outer_func(10);
-- repeated call should work
select outer_outer_func(20);
drop function outer_outer_func(int);
drop function outer_func(int);
drop function inner_func(int);
-- access to call stack from exception
create function inner_func(int)
returns int as $$
declare
_context text;
sx int := 5;
begin
begin
perform sx / 0;
exception
when division_by_zero then
get diagnostics _context = pg_context;
raise notice '***%***', _context;
end;
-- lets do it again, just for fun..
get diagnostics _context = pg_context;
raise notice '***%***', _context;
raise notice 'lets make sure we didnt break anything';
return 2 * $1;
end;
$$ language plpgsql;
create or replace function outer_func(int)
returns int as $$
declare
myresult int;
begin
raise notice 'calling down into inner_func()';
myresult := inner_func($1);
raise notice 'inner_func() done';
return myresult;
end;
$$ language plpgsql;
create or replace function outer_outer_func(int)
returns int as $$
declare
myresult int;
begin
raise notice 'calling down into outer_func()';
myresult := outer_func($1);
raise notice 'outer_func() done';
return myresult;
end;
$$ language plpgsql;
select outer_outer_func(10);
-- repeated call should work
select outer_outer_func(20);
drop function outer_outer_func(int);
drop function outer_func(int);
drop function inner_func(int);
-- Test pg_routine_oid
create function current_function(text)
returns regprocedure as $$
declare
fn_oid regprocedure;
begin
get diagnostics fn_oid = pg_routine_oid;
return fn_oid;
end;
$$ language plpgsql;
select current_function('foo');
drop function current_function(text);
-- shouldn't fail in DO, even though there's no useful data
do $$
declare
fn_oid oid;
begin
get diagnostics fn_oid = pg_routine_oid;
raise notice 'pg_routine_oid = %', fn_oid;
end;
$$;
--
-- Test ASSERT
--
do $$
begin
assert 1=1; -- should succeed
end;
$$;
do $$
begin
assert 1=0; -- should fail
end;
$$;
do $$
begin
assert NULL; -- should fail
end;
$$;
-- check controlling GUC
set plpgsql.check_asserts = off;
do $$
begin
assert 1=0; -- won't be tested
end;
$$;
reset plpgsql.check_asserts;
-- test custom message
do $$
declare var text := 'some value';
begin
assert 1=0, format('assertion failed, var = "%s"', var);
end;
$$;
-- ensure assertions are not trapped by 'others'
do $$
begin
assert 1=0, 'unhandled assertion';
exception when others then
null; -- do nothing
end;
$$;
-- Test use of plpgsql in a domain check constraint (cf. bug #14414)
create function plpgsql_domain_check(val int) returns boolean as $$
begin return val > 0; end
$$ language plpgsql immutable;
create domain plpgsql_domain as integer check(plpgsql_domain_check(value));
do $$
declare v_test plpgsql_domain;
begin
v_test := 1;
end;
$$;
do $$
declare v_test plpgsql_domain := 1;
begin
v_test := 0; -- fail
end;
$$;
-- Test handling of expanded array passed to a domain constraint (bug #14472)
create function plpgsql_arr_domain_check(val int[]) returns boolean as $$
begin return val[1] > 0; end
$$ language plpgsql immutable;
create domain plpgsql_arr_domain as int[] check(plpgsql_arr_domain_check(value));
do $$
declare v_test plpgsql_arr_domain;
begin
v_test := array[1];
v_test := v_test || 2;
end;
$$;
do $$
declare v_test plpgsql_arr_domain := array[1];
begin
v_test := 0 || v_test; -- fail
end;
$$;
--
-- test usage of transition tables in AFTER triggers
--
CREATE TABLE transition_table_base (id int PRIMARY KEY, val text);
CREATE FUNCTION transition_table_base_ins_func()
RETURNS trigger
LANGUAGE plpgsql
AS $$
DECLARE
t text;
l text;
BEGIN
t = '';
FOR l IN EXECUTE
$q$
EXPLAIN (TIMING off, COSTS off, VERBOSE on)
SELECT * FROM newtable
$q$ LOOP
t = t || l || E'\n';
END LOOP;
RAISE INFO '%', t;
RETURN new;
END;
$$;
CREATE TRIGGER transition_table_base_ins_trig
AFTER INSERT ON transition_table_base
REFERENCING OLD TABLE AS oldtable NEW TABLE AS newtable
FOR EACH STATEMENT
EXECUTE PROCEDURE transition_table_base_ins_func();
CREATE TRIGGER transition_table_base_ins_trig
AFTER INSERT ON transition_table_base
REFERENCING NEW TABLE AS newtable
FOR EACH STATEMENT
EXECUTE PROCEDURE transition_table_base_ins_func();
INSERT INTO transition_table_base VALUES (1, 'One'), (2, 'Two');
INSERT INTO transition_table_base VALUES (3, 'Three'), (4, 'Four');
CREATE OR REPLACE FUNCTION transition_table_base_upd_func()
RETURNS trigger
LANGUAGE plpgsql
AS $$
DECLARE
t text;
l text;
BEGIN
t = '';
FOR l IN EXECUTE
$q$
EXPLAIN (TIMING off, COSTS off, VERBOSE on)
SELECT * FROM oldtable ot FULL JOIN newtable nt USING (id)
$q$ LOOP
t = t || l || E'\n';
END LOOP;
RAISE INFO '%', t;
RETURN new;
END;
$$;
CREATE TRIGGER transition_table_base_upd_trig
AFTER UPDATE ON transition_table_base
REFERENCING OLD TABLE AS oldtable NEW TABLE AS newtable
FOR EACH STATEMENT
EXECUTE PROCEDURE transition_table_base_upd_func();
UPDATE transition_table_base
SET val = '*' || val || '*'
WHERE id BETWEEN 2 AND 3;
CREATE TABLE transition_table_level1
(
level1_no serial NOT NULL ,
level1_node_name varchar(255),
PRIMARY KEY (level1_no)
) WITHOUT OIDS;
CREATE TABLE transition_table_level2
(
level2_no serial NOT NULL ,
parent_no int NOT NULL,
level1_node_name varchar(255),
PRIMARY KEY (level2_no)
) WITHOUT OIDS;
CREATE TABLE transition_table_status
(
level int NOT NULL,
node_no int NOT NULL,
status int,
PRIMARY KEY (level, node_no)
) WITHOUT OIDS;
CREATE FUNCTION transition_table_level1_ri_parent_del_func()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
DECLARE n bigint;
BEGIN
PERFORM FROM p JOIN transition_table_level2 c ON c.parent_no = p.level1_no;
IF FOUND THEN
RAISE EXCEPTION 'RI error';
END IF;
RETURN NULL;
END;
$$;
CREATE TRIGGER transition_table_level1_ri_parent_del_trigger
AFTER DELETE ON transition_table_level1
REFERENCING OLD TABLE AS p
FOR EACH STATEMENT EXECUTE PROCEDURE
transition_table_level1_ri_parent_del_func();
CREATE FUNCTION transition_table_level1_ri_parent_upd_func()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
DECLARE
x int;
BEGIN
WITH p AS (SELECT level1_no, sum(delta) cnt
FROM (SELECT level1_no, 1 AS delta FROM i
UNION ALL
SELECT level1_no, -1 AS delta FROM d) w
GROUP BY level1_no
HAVING sum(delta) < 0)
SELECT level1_no
FROM p JOIN transition_table_level2 c ON c.parent_no = p.level1_no
INTO x;
IF FOUND THEN
RAISE EXCEPTION 'RI error';
END IF;
RETURN NULL;
END;
$$;
CREATE TRIGGER transition_table_level1_ri_parent_upd_trigger
AFTER UPDATE ON transition_table_level1
REFERENCING OLD TABLE AS d NEW TABLE AS i
FOR EACH STATEMENT EXECUTE PROCEDURE
transition_table_level1_ri_parent_upd_func();
CREATE FUNCTION transition_table_level2_ri_child_insupd_func()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
BEGIN
PERFORM FROM i
LEFT JOIN transition_table_level1 p
ON p.level1_no IS NOT NULL AND p.level1_no = i.parent_no
WHERE p.level1_no IS NULL;
IF FOUND THEN
RAISE EXCEPTION 'RI error';
END IF;
RETURN NULL;
END;
$$;
CREATE TRIGGER transition_table_level2_ri_child_ins_trigger
AFTER INSERT ON transition_table_level2
REFERENCING NEW TABLE AS i
FOR EACH STATEMENT EXECUTE PROCEDURE
transition_table_level2_ri_child_insupd_func();
CREATE TRIGGER transition_table_level2_ri_child_upd_trigger
AFTER UPDATE ON transition_table_level2
REFERENCING NEW TABLE AS i
FOR EACH STATEMENT EXECUTE PROCEDURE
transition_table_level2_ri_child_insupd_func();
-- create initial test data
INSERT INTO transition_table_level1 (level1_no)
SELECT generate_series(1,200);
ANALYZE transition_table_level1;
INSERT INTO transition_table_level2 (level2_no, parent_no)
SELECT level2_no, level2_no / 50 + 1 AS parent_no
FROM generate_series(1,9999) level2_no;
ANALYZE transition_table_level2;
INSERT INTO transition_table_status (level, node_no, status)
SELECT 1, level1_no, 0 FROM transition_table_level1;
INSERT INTO transition_table_status (level, node_no, status)
SELECT 2, level2_no, 0 FROM transition_table_level2;
ANALYZE transition_table_status;
INSERT INTO transition_table_level1(level1_no)
SELECT generate_series(201,1000);
ANALYZE transition_table_level1;
-- behave reasonably if someone tries to modify a transition table
CREATE FUNCTION transition_table_level2_bad_usage_func()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
BEGIN
INSERT INTO dx VALUES (1000000, 1000000, 'x');
RETURN NULL;
END;
$$;
CREATE TRIGGER transition_table_level2_bad_usage_trigger
AFTER DELETE ON transition_table_level2
REFERENCING OLD TABLE AS dx
FOR EACH STATEMENT EXECUTE PROCEDURE
transition_table_level2_bad_usage_func();
DELETE FROM transition_table_level2
WHERE level2_no BETWEEN 301 AND 305;
DROP TRIGGER transition_table_level2_bad_usage_trigger
ON transition_table_level2;
-- attempt modifications which would break RI (should all fail)
DELETE FROM transition_table_level1
WHERE level1_no = 25;
UPDATE transition_table_level1 SET level1_no = -1
WHERE level1_no = 30;
INSERT INTO transition_table_level2 (level2_no, parent_no)
VALUES (10000, 10000);
UPDATE transition_table_level2 SET parent_no = 2000
WHERE level2_no = 40;
-- attempt modifications which would not break RI (should all succeed)
DELETE FROM transition_table_level1
WHERE level1_no BETWEEN 201 AND 1000;
DELETE FROM transition_table_level1
WHERE level1_no BETWEEN 100000000 AND 100000010;
SELECT count(*) FROM transition_table_level1;
DELETE FROM transition_table_level2
WHERE level2_no BETWEEN 211 AND 220;
SELECT count(*) FROM transition_table_level2;
CREATE TABLE alter_table_under_transition_tables
(
id int PRIMARY KEY,
name text
);
CREATE FUNCTION alter_table_under_transition_tables_upd_func()
RETURNS TRIGGER
LANGUAGE plpgsql
AS $$
BEGIN
RAISE WARNING 'old table = %, new table = %',
(SELECT string_agg(id || '=' || name, ',') FROM d),
(SELECT string_agg(id || '=' || name, ',') FROM i);
RAISE NOTICE 'one = %', (SELECT 1 FROM alter_table_under_transition_tables LIMIT 1);
RETURN NULL;
END;
$$;
-- should fail, TRUNCATE is not compatible with transition tables
CREATE TRIGGER alter_table_under_transition_tables_upd_trigger
AFTER TRUNCATE OR UPDATE ON alter_table_under_transition_tables
REFERENCING OLD TABLE AS d NEW TABLE AS i
FOR EACH STATEMENT EXECUTE PROCEDURE
alter_table_under_transition_tables_upd_func();
-- should work
CREATE TRIGGER alter_table_under_transition_tables_upd_trigger
AFTER UPDATE ON alter_table_under_transition_tables
REFERENCING OLD TABLE AS d NEW TABLE AS i
FOR EACH STATEMENT EXECUTE PROCEDURE
alter_table_under_transition_tables_upd_func();
INSERT INTO alter_table_under_transition_tables
VALUES (1, '1'), (2, '2'), (3, '3');
UPDATE alter_table_under_transition_tables
SET name = name || name;
-- now change 'name' to an integer to see what happens...
ALTER TABLE alter_table_under_transition_tables
ALTER COLUMN name TYPE int USING name::integer;
UPDATE alter_table_under_transition_tables
SET name = (name::text || name::text)::integer;
-- now drop column 'name'
ALTER TABLE alter_table_under_transition_tables
DROP column name;
UPDATE alter_table_under_transition_tables
SET id = id;
--
-- Test multiple reference to a transition table
--
CREATE TABLE multi_test (i int);
INSERT INTO multi_test VALUES (1);
CREATE OR REPLACE FUNCTION multi_test_trig() RETURNS trigger
LANGUAGE plpgsql AS $$
BEGIN
RAISE NOTICE 'count = %', (SELECT COUNT(*) FROM new_test);
RAISE NOTICE 'count union = %',
(SELECT COUNT(*)
FROM (SELECT * FROM new_test UNION ALL SELECT * FROM new_test) ss);
RETURN NULL;
END$$;
CREATE TRIGGER my_trigger AFTER UPDATE ON multi_test
REFERENCING NEW TABLE AS new_test OLD TABLE as old_test
FOR EACH STATEMENT EXECUTE PROCEDURE multi_test_trig();
UPDATE multi_test SET i = i;
DROP TABLE multi_test;
DROP FUNCTION multi_test_trig();
--
-- Check type parsing and record fetching from partitioned tables
--
CREATE TABLE partitioned_table (a int, b text) PARTITION BY LIST (a);
CREATE TABLE pt_part1 PARTITION OF partitioned_table FOR VALUES IN (1);
CREATE TABLE pt_part2 PARTITION OF partitioned_table FOR VALUES IN (2);
INSERT INTO partitioned_table VALUES (1, 'Row 1');
INSERT INTO partitioned_table VALUES (2, 'Row 2');
CREATE OR REPLACE FUNCTION get_from_partitioned_table(partitioned_table.a%type)
RETURNS partitioned_table AS $$
DECLARE
a_val partitioned_table.a%TYPE;
result partitioned_table%ROWTYPE;
BEGIN
a_val := $1;
SELECT * INTO result FROM partitioned_table WHERE a = a_val;
RETURN result;
END; $$ LANGUAGE plpgsql;
SELECT * FROM get_from_partitioned_table(1) AS t;
CREATE OR REPLACE FUNCTION list_partitioned_table()
RETURNS SETOF public.partitioned_table.a%TYPE AS $$
DECLARE
row public.partitioned_table%ROWTYPE;
a_val public.partitioned_table.a%TYPE;
BEGIN
FOR row IN SELECT * FROM public.partitioned_table ORDER BY a LOOP
a_val := row.a;
RETURN NEXT a_val;
END LOOP;
RETURN;
END; $$ LANGUAGE plpgsql;
SELECT * FROM list_partitioned_table() AS t;
--
-- Check argument name is used instead of $n in error message
--
CREATE FUNCTION fx(x WSlot) RETURNS void AS $$
BEGIN
GET DIAGNOSTICS x = ROW_COUNT;
RETURN;
END; $$ LANGUAGE plpgsql;
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