RETURNING MORE THAN ONE CUSTOM TYPE FROM FUNCTION

On Thu, Jun 14, 2012 at 1:10 AM, utsav <utsav.pshah@tcs.com> wrote:

I am doing Oracle to PostgreSQL migration activity as part of Procedure
Migration in Oracle there are *OUT parameters which return records(using
bulk collect) of custom type.*

*like function returing type1,type2. *

What will be alternative for PostgreSQL to do this.

*There are OUT parameters in PostgreSQL but i am not able to set returns set
of type1,type2 .
*
Appreciate your Help.

postgres=# create type foo as (a int, b text);
CREATE TYPE
postgres=# create type bar as (c int, d text);
CREATE TYPE
postgres=# create function f(foo out foo, bar out bar) returns setof
record as $$
select (v, v::text)::foo, (v, v::text)::bar from generate_series(1,3) v;
$$ language sql;
CREATE FUNCTION
postgres=# select f();
f
-------------------
("(1,1)","(1,1)")
("(2,2)","(2,2)")
("(3,3)","(3,3)")
(3 rows)

postgres=# select * from f();
foo | bar
-------+-------
(1,1) | (1,1)
(2,2) | (2,2)
(3,3) | (3,3)
(3 rows)

postgres=# select (foo).*, (bar).* from f();
a | b | c | d
---+---+---+---
1 | 1 | 1 | 1
2 | 2 | 2 | 2
3 | 3 | 3 | 3
(3 rows)

merlin

Thanks for reply but you have used SQL as a language .

Please give me Plpgsql example because i am facing problem in plpgsql only
..

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On Mon, Jun 18, 2012 at 4:30 AM, utsav <utsav.pshah@tcs.com> wrote:

Thanks for reply but you have used SQL as a language .

Please give me Plpgsql example because  i am facing problem in plpgsql only

create function f(foo out foo, bar out bar) returns setof
record as $$
begin
return query select (v, v::text)::foo, (v, v::text)::bar from
generate_series(1,3) v;
end
$$ language plpgsql;

-- or --

create or replace function f(foo out foo, bar out bar) returns setof
record as $$
begin
f.foo = (1,'a')::foo;
f.bar = (2,'b')::bar;
return next;
end
$$ language plpgsql;

(in older versions of postgres you might have to be a little more
careful about names of input and output arguments).

merlin

-- Table: bar

-- DROP TABLE bar;

CREATE TABLE bar
(
barid integer,
barsubid integer,
barname text
)
WITH (
OIDS=FALSE
);
ALTER TABLE bar
OWNER TO postgres;
--------------------------------------------------------------------------------------------
-- Table: foo

-- DROP TABLE foo;

CREATE TABLE foo
(
fooid integer,
foosubid integer,
fooname text
)
WITH (
OIDS=FALSE
);
ALTER TABLE foo
OWNER TO postgres;

--------------------------------------------------------------------------------------------

-- Function: getallfoobar()

-- DROP FUNCTION getallfoobar();

CREATE OR REPLACE FUNCTION getallfoobar3(foo OUT foo,bar OUT bar)
RETURNS SETOF record AS
$BODY$
DECLARE
r foo%rowtype;
r1 bar%rowtype;
BEGIN
FOR r IN SELECT * FROM foo
WHERE fooid > 3
LOOP
-- can do some processing here
RAISE NOTICE 'r == %',r;
-- return next row of SELECT
END LOOP;

FOR r1 IN SELECT * FROM bar
WHERE barid > 0
LOOP
-- can do some processing here
-- return next row of SELECT
RAISE NOTICE 'r1 == %',r1;
END LOOP;
RETURN NEXT;
END
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100
ROWS 1000;
-----------------------------------------------------------------------------------

select * from getallfoobar3();

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I am getting null in output.

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On Mon, Jun 18, 2012 at 12:04 PM, utsav <utsav.pshah@tcs.com> wrote:

-- Table: bar

-- DROP TABLE bar;

CREATE TABLE bar
(
 barid integer,
 barsubid integer,
 barname text
)
WITH (
 OIDS=FALSE
);
ALTER TABLE bar
 OWNER TO postgres;
--------------------------------------------------------------------------------------------
-- Table: foo

-- DROP TABLE foo;

CREATE TABLE foo
(
 fooid integer,
 foosubid integer,
 fooname text
)
WITH (
 OIDS=FALSE
);
ALTER TABLE foo
 OWNER TO postgres;

--------------------------------------------------------------------------------------------

-- Function: getallfoobar()

-- DROP FUNCTION getallfoobar();

CREATE OR REPLACE FUNCTION getallfoobar3(foo OUT foo,bar OUT bar)
 RETURNS SETOF record AS
$BODY$
 DECLARE
    r foo%rowtype;
    r1 bar%rowtype;
 BEGIN
    FOR r IN SELECT * FROM foo
    WHERE fooid > 3
    LOOP
        -- can do some processing here
             RAISE NOTICE 'r == %',r;
        -- return next row of SELECT
    END LOOP;

    FOR r1 IN SELECT * FROM bar
    WHERE barid > 0
    LOOP
        -- can do some processing here
         -- return next row of SELECT
        RAISE NOTICE 'r1 == %',r1;
    END LOOP;
    RETURN NEXT;
 END
$BODY$
 LANGUAGE plpgsql VOLATILE
 COST 100
 ROWS 1000;
-----------------------------------------------------------------------------------

select * from getallfoobar3();

you're getting null results because you never assigned anything to
your output variables. 'RETURN NEXT' will emit a new record for both
OUT foo and OUT bar based on whatever they are containing at the time.
Try running my example above and extending it.

merlin

-- Function: getallfoobar()

-- DROP FUNCTION getallfoobar();

CREATE OR REPLACE FUNCTION getallfoobar3(foo OUT foo,bar OUT bar)
RETURNS SETOF record AS
$BODY$
DECLARE
r foo%rowtype;
r1 bar%rowtype;

BEGIN
FOR r IN SELECT * FROM foo
WHERE fooid > 3
LOOP
-- can do some processing here
RAISE NOTICE 'r == %',r;
-- return next row of SELECT'
getallfoobar3.foo = r;
END LOOP;

FOR r1 IN SELECT * FROM bar
WHERE barid > 0
LOOP
-- can do some processing here
-- return next row of SELECT
RAISE NOTICE 'r1 == %',r1;
END LOOP;
getallfoobar3.bar = r1;
RETURN NEXT;
END
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100
ROWS 1000;

/Thanks for your help ../

*But still i want output in record here i am getting only last record in
ouput ...*

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On Mon, Jun 18, 2012 at 1:33 PM, utsav <utsav.pshah@tcs.com> wrote:

-- Function: getallfoobar()

-- DROP FUNCTION getallfoobar();

CREATE OR REPLACE FUNCTION getallfoobar3(foo OUT foo,bar OUT bar)
 RETURNS SETOF record AS
$BODY$
 DECLARE
    r foo%rowtype;
    r1 bar%rowtype;

BEGIN
    FOR r IN SELECT * FROM foo
    WHERE fooid > 3
    LOOP
        -- can do some processing here
             RAISE NOTICE 'r == %',r;
        -- return next row of SELECT'
        getallfoobar3.foo = r;
    END LOOP;

    FOR r1 IN SELECT * FROM bar
    WHERE barid > 0
    LOOP
        -- can do some processing here
         -- return next row of SELECT
        RAISE NOTICE 'r1 == %',r1;
    END LOOP;
   getallfoobar3.bar = r1;
    RETURN NEXT;
 END
$BODY$
 LANGUAGE plpgsql VOLATILE
 COST 100
 ROWS 1000;

/Thanks for your help ../

*But still i want output in record here i am getting only last record in
ouput  ...*

sure -- you're only calling one 'return next'. you need to call
return next for each row you want to return.

you've also got two loops -- that isn't going to work as intended.
your code should be structured like this:

FOR <something that gets same sized list of foo and bar>
LOOP
<get a foo into f>
foo := f;
<get a bar into b>
bar := b;
RETURN NEXT;
END LOOP;

If you want heterogeneously sized lists to be returned from a single
function, you might want to consider returning arrays, not a set
returning function.

merlin

CREATE OR REPLACE FUNCTION "morse_new_sit"."proc_get_freq_svrty_array1"(IN
ip_dim_type bigint, IN ip_type bigint, IN ip_frqsubype bigint, IN
ip_svrsubtype bigint ,
--,
op_dimlist OUT morse_new_sit.user_fs_obj[],op_freqlist OUT
morse_new_sit.user_fs_obj[],op_svrlist OUT
morse_new_sit.user_fs_obj[],op_clrlist OUT morse_new_sit.user_clr_obj[]
) RETURNS SETOF record AS $BODY$

DECLARE

op_dimlist morse_new_sit.user_fs_obj%rowtype;
op_dimlist_array morse_new_sit.user_fs_obj[];
op_freqlist morse_new_sit.user_fs_obj%rowtype;
op_freqlist_array morse_new_sit.user_fs_obj[];
op_svrlist morse_new_sit.user_fs_obj%rowtype;
op_svrlist_array morse_new_sit.user_fs_obj[];
op_clrlist morse_new_sit.user_clr_obj%rowtype;
op_clrlist_array morse_new_sit.user_clr_obj[];
m int;

BEGIN
RAISE NOTICE 'GET DIM DETAILS';
-- Get the DIM details
FOR op_dimlist IN
SELECT DD_DIMID,dd_dimname,dd_dimcolorcd FROM morse_new_sit.DIM_DEF
WHERE DD_DIMTYPE = IP_DIM_TYPE
AND DD_STATUS = 0
AND date_trunc('day', LOCALTIMESTAMP) BETWEEN DD_VALIDFROM AND DD_VALIDTO
LOOP
op_dimlist_array := array_append(op_dimlist_array,op_dimlist);
*proc_get_freq_svrty_array1.op_dimlist = op_dimlist_array;*
RAISE NOTICE 'OP_DIM_LIST %',op_dimlist;
END LOOP;
m := array_length(op_dimlist_array, 1);
RAISE NOTICE ' array count ::: %',m;

--Return op_dimlist_array;

-- GET the FREQ details
FOR op_freqlist IN
SELECT DD_DIMID,dd_dimname, dd_dimcolorcd FROM morse_new_sit.DIM_DEF
WHERE DD_DIMTYPE = ip_type

AND DD_DIMSUBTYPE = ip_frqsubype

AND DD_STATUS = 0

AND date_trunc('day', LOCALTIMESTAMP) BETWEEN DD_VALIDFROM AND
DD_VALIDTO
LOOP
op_freqlist_array := array_append(op_freqlist_array,op_freqlist);
RAISE NOTICE 'op_freqlist LIST %',op_freqlist;
* proc_get_freq_svrty_array1.op_freqlist = op_freqlist_array;*
END LOOP;
m := array_length(op_freqlist_array, 1);
RAISE NOTICE ' array count ::: %',m;
--RETURN op_freqlist_array;
--Get the Severity
FOR op_svrlist IN
SELECT DD_DIMID,dd_dimname, dd_dimcolorcd FROM morse_new_sit.DIM_DEF
WHERE DD_DIMTYPE = ip_type

AND DD_DIMSUBTYPE = ip_svrsubType

AND DD_STATUS = 0

AND date_trunc('day', LOCALTIMESTAMP) BETWEEN DD_VALIDFROM AND
DD_VALIDTO
LOOP
op_svrlist_array := array_append(op_svrlist_array,op_svrlist);
RAISE NOTICE 'op_svrlist LIST %',op_svrlist;
* proc_get_freq_svrty_array1.op_svrlist = op_svrlist_array;*
END LOOP;
m := array_length(op_svrlist_array, 1);
RAISE NOTICE ' array count ::: %',m;
--RETURN op_svrlist_array ;

FOR OP_CLRLIST IN
SELECT cs_second_scale, cs_first_scale,CS_COLOR_CODE FROM
morse_new_sit.COMPOSITE_SCORE
WHERE CS_SECOND_SCALE IN (SELECT DD_DIMID

FROM morse_new_sit.DIM_DEF

WHERE DD_DIMTYPE = ip_type

AND DD_DIMSUBTYPE = ip_frqsubype

AND date_trunc('day', LOCALTIMESTAMP)
BETWEEN DD_VALIDFROM AND DD_VALIDTO

AND DD_STATUS = 0)

AND CS_FIRST_SCALE IN (SELECT DD_DIMID

FROM morse_new_sit.DIM_DEF

WHERE DD_DIMTYPE = ip_type

AND DD_DIMSUBTYPE = ip_svrsubType

AND date_trunc('day', LOCALTIMESTAMP)
BETWEEN DD_VALIDFROM AND DD_VALIDTO

AND DD_STATUS = 0)

AND CS_STATUS = 0
LOOP
OP_CLRLIST_array := array_append(OP_CLRLIST_array,OP_CLRLIST);
RAISE NOTICE 'OP_CLRLIST %',OP_CLRLIST;
* proc_get_freq_svrty_array1.OP_CLRLIST = OP_CLRLIST_array ;*
--RETURN OP_CLRLIST_array;
END LOOP;
m := array_length(OP_CLRLIST_array, 1);
RAISE NOTICE ' array count ::: %',m;
--RETURN anyarray;

END;

$BODY$
LANGUAGE 'plpgsql' VOLATILE COST 100;

*I am getting null in the output *
*/
Appreciate your help merlin /*

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On Wed, Jun 20, 2012 at 5:31 AM, utsav <utsav.pshah@tcs.com> wrote:

CREATE OR REPLACE FUNCTION "morse_new_sit"."proc_get_freq_svrty_array1"(IN
ip_dim_type bigint, IN ip_type bigint, IN ip_frqsubype bigint, IN
ip_svrsubtype bigint ,
--,
 op_dimlist OUT  morse_new_sit.user_fs_obj[],op_freqlist OUT
morse_new_sit.user_fs_obj[],op_svrlist OUT
morse_new_sit.user_fs_obj[],op_clrlist OUT morse_new_sit.user_clr_obj[]
) RETURNS SETOF record AS $BODY$

DECLARE

op_dimlist morse_new_sit.user_fs_obj%rowtype;
op_dimlist_array morse_new_sit.user_fs_obj[];
op_freqlist morse_new_sit.user_fs_obj%rowtype;
op_freqlist_array morse_new_sit.user_fs_obj[];
op_svrlist morse_new_sit.user_fs_obj%rowtype;
op_svrlist_array morse_new_sit.user_fs_obj[];
op_clrlist morse_new_sit.user_clr_obj%rowtype;
op_clrlist_array morse_new_sit.user_clr_obj[];
m int;

BEGIN
RAISE NOTICE 'GET DIM DETAILS';
       -- Get the DIM details
       FOR op_dimlist IN
       SELECT DD_DIMID,dd_dimname,dd_dimcolorcd FROM morse_new_sit.DIM_DEF
       WHERE DD_DIMTYPE = IP_DIM_TYPE
       AND DD_STATUS = 0
       AND date_trunc('day', LOCALTIMESTAMP) BETWEEN DD_VALIDFROM AND DD_VALIDTO
       LOOP
       op_dimlist_array := array_append(op_dimlist_array,op_dimlist);
*proc_get_freq_svrty_array1.op_dimlist = op_dimlist_array;*
       RAISE NOTICE 'OP_DIM_LIST %',op_dimlist;
       END LOOP;
       m := array_length(op_dimlist_array, 1);
RAISE NOTICE ' array count ::: %',m;

--Return  op_dimlist_array;

       -- GET the FREQ details
       FOR op_freqlist IN
       SELECT DD_DIMID,dd_dimname, dd_dimcolorcd FROM morse_new_sit.DIM_DEF
       WHERE DD_DIMTYPE = ip_type

       AND DD_DIMSUBTYPE = ip_frqsubype

       AND DD_STATUS = 0

       AND date_trunc('day', LOCALTIMESTAMP) BETWEEN DD_VALIDFROM AND
DD_VALIDTO
       LOOP
       op_freqlist_array := array_append(op_freqlist_array,op_freqlist);
       RAISE NOTICE 'op_freqlist LIST %',op_freqlist;
*       proc_get_freq_svrty_array1.op_freqlist = op_freqlist_array;*
       END LOOP;
       m := array_length(op_freqlist_array, 1);
RAISE NOTICE ' array count ::: %',m;
--RETURN        op_freqlist_array;
       --Get the Severity
       FOR op_svrlist IN
       SELECT DD_DIMID,dd_dimname, dd_dimcolorcd FROM morse_new_sit.DIM_DEF
       WHERE DD_DIMTYPE = ip_type

       AND DD_DIMSUBTYPE = ip_svrsubType

       AND DD_STATUS = 0

       AND date_trunc('day', LOCALTIMESTAMP) BETWEEN DD_VALIDFROM AND
DD_VALIDTO
       LOOP
       op_svrlist_array := array_append(op_svrlist_array,op_svrlist);
       RAISE NOTICE 'op_svrlist LIST %',op_svrlist;
*       proc_get_freq_svrty_array1.op_svrlist = op_svrlist_array;*
       END LOOP;
       m := array_length(op_svrlist_array, 1);
RAISE NOTICE ' array count ::: %',m;
--RETURN        op_svrlist_array ;

               FOR OP_CLRLIST IN
               SELECT cs_second_scale, cs_first_scale,CS_COLOR_CODE FROM
morse_new_sit.COMPOSITE_SCORE
               WHERE CS_SECOND_SCALE IN (SELECT DD_DIMID

                                 FROM morse_new_sit.DIM_DEF

                                 WHERE DD_DIMTYPE = ip_type

                                 AND DD_DIMSUBTYPE = ip_frqsubype

                                  AND date_trunc('day', LOCALTIMESTAMP)
BETWEEN DD_VALIDFROM AND DD_VALIDTO

                                 AND DD_STATUS = 0)

                                               AND CS_FIRST_SCALE IN (SELECT DD_DIMID

                                 FROM morse_new_sit.DIM_DEF

                                 WHERE DD_DIMTYPE = ip_type

                                 AND DD_DIMSUBTYPE = ip_svrsubType

                                  AND date_trunc('day', LOCALTIMESTAMP)
BETWEEN DD_VALIDFROM AND DD_VALIDTO

                                 AND DD_STATUS = 0)

       AND CS_STATUS = 0
               LOOP
               OP_CLRLIST_array := array_append(OP_CLRLIST_array,OP_CLRLIST);
               RAISE NOTICE 'OP_CLRLIST %',OP_CLRLIST;
*               proc_get_freq_svrty_array1.OP_CLRLIST = OP_CLRLIST_array ;*
 --RETURN OP_CLRLIST_array;
       END LOOP;
       m := array_length(OP_CLRLIST_array, 1);
RAISE NOTICE ' array count ::: %',m;
--RETURN  anyarray;

END;

$BODY$
 LANGUAGE 'plpgsql' VOLATILE COST 100;

*I am getting null in the output *
*/
Appreciate your help merlin /*

uh, you have no return statements. of course the output is null. if
you are using loops, you *must* use return next. Also each return
next will return *all* the OUT variables.

merlin

Ya but when i use the return next it gives me all OUT parameters but i will
get last record of out parameter1 repetitive untill the last record of last
out parameter . Sorry i didn't have output with me . Is there any other way
to achive this ?

Many Thanks for your help merlin ...

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On Wed, Jun 20, 2012 at 12:15 PM, utsav <utsav.pshah@tcs.com> wrote:

Ya but when i use the return next it gives me all OUT parameters but i will
get last record of out parameter1 repetitive untill the last record of last
out parameter . Sorry i didn't have output with me . Is there any other way
to achive this ?

Many Thanks for your help merlin ...

right -- exactly. this is how set returning functions work. Each
returned row contains both OUT variables. You can't return a set of
parameter1 then swing around and return a set of parmameter2. If you
want to return two independent sets, you are using the wrong
mechanism.

merlin

merlin can u please suggest any solution for achiving this . I have tried
array but still i am not getting how to return different array and for
returning array i must have to pass one array in input parameter and that
only i can return that is where i got stuck .

Thanks

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anyone had faced the same issue than pl help..

merlin : i am waiting for your reply ...

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On Wed, Jun 20, 2012 at 9:52 PM, utsav <utsav.pshah@tcs.com> wrote:

merlin can u please suggest any solution for achiving this . I have tried
array but still i am not getting how to return different array and for
returning array i must have to pass one array in input parameter and that
only i can return that is where i got stuck .

why not make two set returning functions? the array approach is
useful but may be difficult to use in your case. it is awkward (read:
slow) to construct arrays iteratively and client processing can be
tricky depending on your application stack.

merlin

merlin in set returning function i have three out parameter returning same
type of object so what

to do in that case if i am using only return next than i get all output in
one set of record so in

the application end i can not distinguish what output is of what parameter .

i want in output like

op_dimlist ,op_freqlist ,op_svrlist
and
i also want to access like select op_dimlist.DD_DIMID from
morse_new_sit.proc_get_freq_svrty(10,10,2,1) and something like that.

CREATE TYPE "user_fs_obj" AS (

DD_DIMID bigint,
DD_DIMNAME varchar(20),
dd_dimcolorcd varchar(10)
);

CREATE OR REPLACE FUNCTION "morse_new_sit"."proc_get_freq_svrty"(IN
ip_dim_type bigint, IN ip_type bigint, IN ip_frqsubype bigint, IN
ip_svrsubtype bigint,
op_dimlist OUT morse_new_sit.user_fs_obj,op_freqlist OUT
morse_new_sit.user_fs_obj,op_svrlist OUT morse_new_sit.user_fs_obj) RETURNS
SETOF morse_new_sit.user_fs_obj AS $BODY$

DECLARE

op_dimlist morse_new_sit.user_fs_obj%rowtype;
op_freqlist morse_new_sit.user_fs_obj%rowtype;
op_svrlist morse_new_sit.user_fs_obj%rowtype;

BEGIN
RAISE NOTICE 'GET DIM DETAILS';
-- Get the DIM details
FOR op_dimlist IN
SELECT DD_DIMID,dd_dimname,dd_dimcolorcd FROM morse_new_sit.DIM_DEF
WHERE DD_DIMTYPE = IP_DIM_TYPE
AND DD_STATUS = 0
AND date_trunc('day', LOCALTIMESTAMP) BETWEEN DD_VALIDFROM AND
DD_VALIDTO
LOOP

proc_get_freq_svrty.op_dimlist = op_dimlist;
return next;
RAISE NOTICE 'OP_DIM_LIST %',op_dimlist;
END LOOP;
--Return op_dimlist_array;

-- GET the FREQ details
FOR op_freqlist IN
SELECT DD_DIMID,dd_dimname, dd_dimcolorcd FROM morse_new_sit.DIM_DEF
WHERE DD_DIMTYPE = ip_type
AND DD_DIMSUBTYPE = ip_frqsubype
AND DD_STATUS = 0
AND date_trunc('day', LOCALTIMESTAMP) BETWEEN DD_VALIDFROM AND
DD_VALIDTO
LOOP

RAISE NOTICE 'op_freqlist LIST %',op_freqlist;
proc_get_freq_svrty.op_freqlist = op_freqlist;
return next;
END LOOP;

--Get the Severity
FOR op_svrlist IN
SELECT DD_DIMID,dd_dimname, dd_dimcolorcd FROM morse_new_sit.DIM_DEF
WHERE DD_DIMTYPE = ip_type

AND DD_DIMSUBTYPE = ip_svrsubType

AND DD_STATUS = 0

AND date_trunc('day', LOCALTIMESTAMP) BETWEEN DD_VALIDFROM AND
DD_VALIDTO
LOOP

RAISE NOTICE 'op_svrlist LIST %',op_svrlist;
proc_get_freq_svrty.op_svrlist = op_svrlist;
return next;
END LOOP;
END;

$BODY$
LANGUAGE 'plpgsql' VOLATILE COST 100;

Thanks for ur help merlin

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