Re: [SQL] plpgsql out parameter with select into
It don't work... Only select into status * from... works. Imre Horvath 2010. 08. 18, szerda keltezéssel 09.42-kor Sergey Konoplev ezt írta: > Hi, > > SELECT column_name > INTO var_name > FROM ... > > 2010/8/17 Horváth Imre : > > Hi! > > > > My question is, how can I get the out parameter from a function with > > SELECT INTO by name? > > I mean: > > > > create function testfunc1(OUT _status integer) returns integer as > > $BODY$ > >_status := 0; > > $BODY$ > > language plpgsql; > > > > create function testfunc2() as > > declare > >status integer; > > $BODY$ > >select into status * from testfunc1(); > > $BODY$ > > language plpgsql; > > > > create function testfunc3() as > > declare > >status integer; > > $BODY$ > >select into status _status from testfunc1(); > > $BODY$ > > language plpgsql; > > > > testfunc2 works, testfunc3 not. > > > > Thanks in advance: > > Imre Horvath > > > > > > -- > > Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) > > To make changes to your subscription: > > http://www.postgresql.org/mailpref/pgsql-sql > > > > > -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
Re: [SQL] plpgsql out parameter with select into
It don't work... Only select into status * from... works. Imre Horvath 2010. 08. 18, szerda keltezéssel 09.42-kor Sergey Konoplev ezt írta: > Hi, > > SELECT column_name > INTO var_name > FROM ... > > 2010/8/17 Horváth Imre : > > Hi! > > > > My question is, how can I get the out parameter from a function with > > SELECT INTO by name? > > I mean: > > > > create function testfunc1(OUT _status integer) returns integer as > > $BODY$ > >_status := 0; > > $BODY$ > > language plpgsql; > > > > create function testfunc2() as > > declare > >status integer; > > $BODY$ > >select into status * from testfunc1(); > > $BODY$ > > language plpgsql; > > > > create function testfunc3() as > > declare > >status integer; > > $BODY$ > >select into status _status from testfunc1(); > > $BODY$ > > language plpgsql; > > > > testfunc2 works, testfunc3 not. > > > > Thanks in advance: > > Imre Horvath > > > > > > -- > > Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) > > To make changes to your subscription: > > http://www.postgresql.org/mailpref/pgsql-sql > > > > > -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
Re: [SQL] plpgsql out parameter with select into
What is your PG version? 2010/8/18 Horváth Imre : > It don't work... > > Only select into status * from... works. > > Imre Horvath > > 2010. 08. 18, szerda keltezéssel 09.42-kor Sergey Konoplev ezt írta: >> Hi, >> >> SELECT column_name >> INTO var_name >> FROM ... >> >> 2010/8/17 Horváth Imre : >> > Hi! >> > >> > My question is, how can I get the out parameter from a function with >> > SELECT INTO by name? >> > I mean: >> > >> > create function testfunc1(OUT _status integer) returns integer as >> > $BODY$ >> > _status := 0; >> > $BODY$ >> > language plpgsql; >> > >> > create function testfunc2() as >> > declare >> > status integer; >> > $BODY$ >> > select into status * from testfunc1(); >> > $BODY$ >> > language plpgsql; >> > >> > create function testfunc3() as >> > declare >> > status integer; >> > $BODY$ >> > select into status _status from testfunc1(); >> > $BODY$ >> > language plpgsql; >> > >> > testfunc2 works, testfunc3 not. >> > >> > Thanks in advance: >> > Imre Horvath >> > >> > >> > -- >> > Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) >> > To make changes to your subscription: >> > http://www.postgresql.org/mailpref/pgsql-sql >> > >> >> >> > > > -- Sergey Konoplev Blog: http://gray-hemp.blogspot.com / Linkedin: http://ru.linkedin.com/in/grayhemp / JID/GTalk: gray...@gmail.com / Skype: gray-hemp / ICQ: 29353802 -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
Re: [SQL] plpgsql out parameter with select into
> 2010/8/18 Horváth Imre : >> It don't work... A function returning a scalar type cannot control the column name assigned to the scalar in the calling query. To do that, you need to return a composite type, which means there need to be at least two OUT parameters if you're trying to do it via OUT-parameter names. regards, tom lane -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
[SQL] Windowed Postgres Query
Hello. I have a database query I am trying to develop. For the purpose of explanation, I am going to use a suit of playing cards in ascending order as an example. The complete data set would look like this: [2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K, A] The WHERE clause would contain "suit = hearts" and the ORDER would be "value ASC". I need to be able to page through the results, so there should be a LIMIT. So a basic example would be "SELECT * FROM cards WHERE suit = hearts ORDER value LIMIT 5" and would yield [2, 3, 4, 5, 6] I need a database query that is "windowed" around a card. The query would return a set of data almost identical in application to windowed pagination links. If the targeted number is in the middle of the set, the query should return the number with 2 records on either side of it: Requesting 5 => [3, 4, 5, 6, 7] Requesting 7 => [5, 6, 7, 8, 9] If it is near the beginning or the ending, it should return the number and as many additional records on either side so that the total number of records is 5. Requesting 2 => [2, 3, 4, 5, 6] Requesting K => [10, J, Q, K, A] If this query is run against a set with less than 5 records, it returns all 5 records. What function, approach or theory should I utilize to accomplish this? What would the query look like? -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
Re: [SQL] plpgsql out parameter with select into
2010/8/19 Tom Lane : >> 2010/8/18 Horváth Imre : >>> It don't work... > > A function returning a scalar type cannot control the column name > assigned to the scalar in the calling query. To do that, you need to > return a composite type, which means there need to be at least two OUT > parameters if you're trying to do it via OUT-parameter names. So we could do either SELECT funcname INTO varname FROM funcname() or SELECT * INTO varname FROM funcname(); or SELECT funcname() INTO varname correct? > > regards, tom lane > > -- > Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-sql > -- Sergey Konoplev Blog: http://gray-hemp.blogspot.com / Linkedin: http://ru.linkedin.com/in/grayhemp / JID/GTalk: gray...@gmail.com / Skype: gray-hemp / ICQ: 29353802 -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
