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* Retrieve the column values of a record without knowing the names
@ 2011-02-16 16:16 arthur_info <arthur_info@yahoo.com.br>
0 siblings, 1 reply; 9+ messages in thread
From: arthur_info @ 2011-02-16 16:16 UTC (permalink / raw)
To: pgsql-sql
Hello,
I've got the following function and I want to access the fields values of my
record by index. The problem is that my select is retrieving each record
line with all values and not each one of each row on my view... How can I
solve this problem?
Thanks in advance.
CREATE FUNCTION fc_teste_tce(aluno integer) RETURNS character varying AS
$BODY$
DECLARE
reg record;
BEGIN
for reg in execute 'SELECT ARRAY (SELECT vw_teste_tce FROM
estagio.vw_teste_tce where aluno = ''3043'' LIMIT 20) AS campos' loop
for j in 1..array_upper(reg.campos,1) loop
raise notice 'Field Value: %',reg.campos[j];
end loop;
end loop;
return 'ok';
END;
$BODY$
LANGUAGE plpgsql VOLATILE;
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* Retrieve the column values of a record without knowing the names
@ 2011-02-16 16:18 arthur_info <arthur_info@yahoo.com.br>
0 siblings, 2 replies; 9+ messages in thread
From: arthur_info @ 2011-02-16 16:18 UTC (permalink / raw)
To: pgsql-sql
Hello,
I've got the following function and I want to access the fields values of my
record by index. The problem is that my select is retrieving each record
line with all values and not each one of each row on my view... How can I
solve this problem?
Thanks in advance.
CREATE FUNCTION fc_teste_tce(aluno integer) RETURNS character varying AS
$BODY$
DECLARE
reg record;
BEGIN
for reg in execute 'SELECT ARRAY (SELECT vw_teste_tce FROM
estagio.vw_teste_tce where aluno = ''3043'' LIMIT 20) AS campos' loop
for j in 1..array_upper(reg.campos,1) loop
raise notice 'Field Value: %',reg.campos[j];
end loop;
end loop;
return 'ok';
END;
$BODY$
LANGUAGE plpgsql VOLATILE;
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* Re: Retrieve the column values of a record without knowing the names
@ 2011-02-18 08:34 Pavel Stehule <pavel.stehule@gmail.com>
parent: arthur_info <arthur_info@yahoo.com.br>
0 siblings, 1 reply; 9+ messages in thread
From: Pavel Stehule @ 2011-02-18 08:34 UTC (permalink / raw)
To: arthur_info <arthur_info@yahoo.com.br>; +Cc: pgsql-sql
Hello
you can't simply iterate over record in plpgsql. You can use a some
toolkits like PLToolkit, or different PL language like PLPerl, or some
dirty trick
http://okbob.blogspot.com/2010/12/iteration-over-record-in-plpgsql.html
regards
Pavel Stehule
2011/2/16 arthur_info <arthur_info@yahoo.com.br>:
>
> Hello,
>
> I've got the following function and I want to access the fields values of my
> record by index. The problem is that my select is retrieving each record
> line with all values and not each one of each row on my view... How can I
> solve this problem?
>
> Thanks in advance.
>
>
> CREATE FUNCTION fc_teste_tce(aluno integer) RETURNS character varying AS
> $BODY$
> DECLARE
> reg record;
> BEGIN
> for reg in execute 'SELECT ARRAY (SELECT vw_teste_tce FROM
> estagio.vw_teste_tce where aluno = ''3043'' LIMIT 20) AS campos' loop
> for j in 1..array_upper(reg.campos,1) loop
> raise notice 'Field Value: %',reg.campos[j];
> end loop;
> end loop;
> return 'ok';
> END;
> $BODY$
>
> LANGUAGE plpgsql VOLATILE;
>
>
> --
> View this message in context: http://postgresql.1045698.n5.nabble.com/Retrieve-the-column-values-of-a-record-without-knowing-the-n...
> Sent from the PostgreSQL - sql mailing list archive at Nabble.com.
>
> --
> Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
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>
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* Re: Retrieve the column values of a record without knowing the names
@ 2011-02-18 09:10 Achilleas Mantzios <achill@matrix.gatewaynet.com>
parent: arthur_info <arthur_info@yahoo.com.br>
1 sibling, 1 reply; 9+ messages in thread
From: Achilleas Mantzios @ 2011-02-18 09:10 UTC (permalink / raw)
To: pgsql-sql
Στις Wednesday 16 February 2011 18:18:19 ο/η arthur_info έγραψε:
>
> Hello,
>
> I've got the following function and I want to access the fields values of my
> record by index. The problem is that my select is retrieving each record
> line with all values and not each one of each row on my view... How can I
> solve this problem?
>
Well by your function, it seems that it does not do what you want.
You want to access the values of one row without knowing the names, but what you do
is create an array over the values of a *known* column.
Also where aluno = ''3043'' does not make any sense either.
Anyways, you might want to look at database metada as found in the information_schema.
For a start you might want to look in information_schema.columns
> Thanks in advance.
>
>
> CREATE FUNCTION fc_teste_tce(aluno integer) RETURNS character varying AS
> $BODY$
> DECLARE
> reg record;
> BEGIN
> for reg in execute 'SELECT ARRAY (SELECT vw_teste_tce FROM
> estagio.vw_teste_tce where aluno = ''3043'' LIMIT 20) AS campos' loop
> for j in 1..array_upper(reg.campos,1) loop
> raise notice 'Field Value: %',reg.campos[j];
> end loop;
> end loop;
> return 'ok';
> END;
> $BODY$
>
> LANGUAGE plpgsql VOLATILE;
>
>
> --
> View this message in context: http://postgresql.1045698.n5.nabble.com/Retrieve-the-column-values-of-a-record-without-knowing-the-n...
> Sent from the PostgreSQL - sql mailing list archive at Nabble.com.
>
--
Achilleas Mantzios
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* Re: Retrieve the column values of a record without knowing the names
@ 2011-02-18 11:46 arthur_info <arthur_info@yahoo.com.br>
parent: Pavel Stehule <pavel.stehule@gmail.com>
0 siblings, 1 reply; 9+ messages in thread
From: arthur_info @ 2011-02-18 11:46 UTC (permalink / raw)
To: pgsql-sql
Very interesting... But with information_schema.columns is easier... Thanks
anyway...
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* Re: Retrieve the column values of a record without knowing the names
@ 2011-02-18 11:47 arthur_info <arthur_info@yahoo.com.br>
parent: Achilleas Mantzios <achill@matrix.gatewaynet.com>
0 siblings, 0 replies; 9+ messages in thread
From: arthur_info @ 2011-02-18 11:47 UTC (permalink / raw)
To: pgsql-sql
Wow, how I didn't think about this solution? Thanks a lot! So easy...
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* Re: Retrieve the column values of a record without knowing the names
@ 2011-02-18 11:59 arthur_info <arthur_info@yahoo.com.br>
parent: arthur_info <arthur_info@yahoo.com.br>
0 siblings, 0 replies; 9+ messages in thread
From: arthur_info @ 2011-02-18 11:59 UTC (permalink / raw)
To: pgsql-sql
Wow, I don't know if I exposed the problem in the right way, but I'm not
achieving the solution with information_schema... Let me show the function:
CREATE OR REPLACE FUNCTION fc_teste_tce2(codigo_aluno integer)
RETURNS character varying AS
$BODY$
DECLARE
reg record;
reg2 record;
msg character varying;
i integer;
BEGIN
msg := '';
i := 0;
for reg in SELECT * FROM estagio.vw_aluno_tce where aluno::integer =
codigo_aluno loop
for reg2 in select column_name
from information_schema.columns
where table_catalog = 'seduc' and
table_schema = 'estagio' and
table_name = 'vw_aluno_tce' loop
if reg.reg2.column_name = '' then --> how can I do this to check
if there's no value for the field?
i := 1;
end if;
end loop;
end loop;
if (i = 1) then
return 'Problems...';
else
return 'ok';
end if;
END;
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100;
Thanks a lot!
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* Re: Retrieve the column values of a record without knowing the names
@ 2011-02-19 09:47 Dmitriy Igrishin <dmitigr@gmail.com>
parent: arthur_info <arthur_info@yahoo.com.br>
1 sibling, 1 reply; 9+ messages in thread
From: Dmitriy Igrishin @ 2011-02-19 09:47 UTC (permalink / raw)
To: arthur_info <arthur_info@yahoo.com.br>; +Cc: pgsql-sql
Hey,
2011/2/16 arthur_info <arthur_info@yahoo.com.br>
>
> Hello,
>
> I've got the following function and I want to access the fields values of
> my
> record by index. The problem is that my select is retrieving each record
> line with all values and not each one of each row on my view... How can I
> solve this problem?
>
You can easily iterate across records from PL/pgSQL by using hstore, e.g:
SELECT (avals(hstore(ROW(83,6,4))))[3];
dmitigr=> SELECT (avals(hstore(ROW(83,6,4))))[3] AS thirdfield;
thirdfield
------------
4
(1 row)
See http://www.postgresql.org/docs/9.0/static/hstore.html
>
> Thanks in advance.
>
>
> CREATE FUNCTION fc_teste_tce(aluno integer) RETURNS character varying AS
> $BODY$
> DECLARE
> reg record;
> BEGIN
> for reg in execute 'SELECT ARRAY (SELECT vw_teste_tce FROM
> estagio.vw_teste_tce where aluno = ''3043'' LIMIT 20) AS campos' loop
> for j in 1..array_upper(reg.campos,1) loop
> raise notice 'Field Value: %',reg.campos[j];
> end loop;
> end loop;
> return 'ok';
> END;
> $BODY$
>
> LANGUAGE plpgsql VOLATILE;
>
>
> --
> View this message in context:
> http://postgresql.1045698.n5.nabble.com/Retrieve-the-column-values-of-a-record-without-knowing-the-n...
> Sent from the PostgreSQL - sql mailing list archive at Nabble.com.
>
> --
> Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-sql
>
--
// Dmitriy.
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* Re: Retrieve the column values of a record without knowing the names
@ 2011-02-22 19:39 arthur_info <arthur_info@yahoo.com.br>
parent: Dmitriy Igrishin <dmitigr@gmail.com>
0 siblings, 0 replies; 9+ messages in thread
From: arthur_info @ 2011-02-22 19:39 UTC (permalink / raw)
To: pgsql-sql
Thanks Dmitry Grishin. The only problem is that my DBA didn't permit install
this command... :(
But, I quit this problem...
Thanks by attention...
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end of thread, other threads:[~2011-02-22 19:39 UTC | newest]
Thread overview: 9+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2011-02-16 16:16 Retrieve the column values of a record without knowing the names arthur_info <arthur_info@yahoo.com.br>
2011-02-18 08:34 ` Pavel Stehule <pavel.stehule@gmail.com>
2011-02-18 11:46 ` arthur_info <arthur_info@yahoo.com.br>
2011-02-18 11:59 ` arthur_info <arthur_info@yahoo.com.br>
2011-02-16 16:18 Retrieve the column values of a record without knowing the names arthur_info <arthur_info@yahoo.com.br>
2011-02-18 09:10 ` Achilleas Mantzios <achill@matrix.gatewaynet.com>
2011-02-18 11:47 ` arthur_info <arthur_info@yahoo.com.br>
2011-02-19 09:47 ` Dmitriy Igrishin <dmitigr@gmail.com>
2011-02-22 19:39 ` arthur_info <arthur_info@yahoo.com.br>
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