Returning a Custom Type from a Postgresql function -

-

i'm trying return custom type postgresql function follows:

drop type if exists gaugesummary_getdaterangeforgauge_type cascade; -- drop our previous type  create type gaugesummary_getdaterangeforgauge_type   -- recreate our type     (     minimum timestamp without time zone,     maximum timestamp without time zone );   create or replace function gaugesummary_getdaterangeforgauge (     gaugeid integer ) returns gaugesummary_getdaterangeforgauge_type  $$ declare     igaugeid alias $1;     oresult     gaugesummary_getdaterangeforgauge_type%rowtype; begin     select oresult         min(archivedminimumtime) minimum,          max(telemeteredmaximumtime) maximum      gaugesummary      gaugeid = $1;      return oresult; end; $$ language plpgsql;  select gaugesummary_getdaterangeforgauge(2291308);

there 2 problems i'm having this.

1) - results come single column "("1753-01-01 12:00:00","2009-11-11 03:45:00")", need them come in 2 columns.

solved! - silly mistake... should select * gaugesummary_getdaterangeforgauge(123)

2) results maximum , minimum values whole table - constraint isn't being used.

example:

gaugesummaryid  gaugeid   archivedminimumtime   telemeteredmaximumtime 80               4491   "2009-03-28 12:00:00"   "2009-06-27 12:00:00" 81               4491   "2009-03-28 12:00:00"   "2009-06-27 12:00:00"

but call function gives me : "1753-01-01 12:00:00", "2009-11-11 03:45:00"

thanks!

answer 2:

it seems running same query inside "language 'sql' stable;" function works fine:

create or replace function gaugesummary_getdaterangeforgauge (     gaugeid integer ) returns gaugesummary_getdaterangeforgauge_type $$     select min(archivedminimumtime) minimum,          max(telemeteredmaximumtime) maximum      gaugesummary gaugeid = $1; $$ language 'sql' stable;

however, nice know why plpgsql function isn't working correctly....

i tried , 2 columns when doing 

select * gaugesummary_getdaterangeforgauge(1);

results:

aadb=# select * gaugesummary_getdaterangeforgauge(1);       minimum               |          maximum ----------------------------+----------------------------  2010-01-11 15:14:20.649786 | 2010-01-11 15:14:24.745783 (1 row)

i using 8.4 , running in psql. clarify how getting results?

as #2, if want results remove min() , max() aggregate functions query. removing ensure results columns returned on row matches id.

update: ok not sure whats going on then. put similar stuff test db , working expect to.

custom type

create type custom_type (     minimum timestamp without time zone,     maximum timestamp without time zone);

table (test)

aadb=# select * test order id;  id |                          |             b ----+----------------------------+----------------------------   1 | 2010-01-11 17:09:52.329779 | 2010-01-11 17:09:52.329779   1 | 2010-01-11 17:10:04.729776 | 2010-01-11 17:10:04.729776   2 | 2010-01-11 17:09:55.049781 | 2010-01-11 17:10:21.753781   2 | 2010-01-11 17:10:30.501781 | 2010-01-11 17:10:30.501781   3 | 2010-01-11 17:09:58.289772 | 2010-01-11 17:09:58.289772   3 | 2010-01-11 17:35:38.089853 | 2010-01-11 17:35:38.089853 (6 rows)

function

create or replace function maxmin (pid integer) returns custom_type $$  declare     oresult custom_type%rowtype;  begin    select oresult min(a) minimum, max(b) maximum    test id = pid;     return oresult;  end;  $$ language plpgsql;

results

aadb=# select * maxmin(2);           minimum           |          maximum ----------------------------+----------------------------  2010-01-11 17:09:55.049781 | 2010-01-11 17:10:30.501781 (1 row)

Comments

Post a Comment

Popular posts from this blog

C#: Application without a window or taskbar item (background app) that can still use Console.WriteLine() -

-
i'm trying create application adheres following: no taskbar no console or form window can utilize console.writeline() . (i.e. if executes app command prompt write console.) the problem if create windows form (or wpf) application can have there no taskbar, console or window show up, console.writeline() nothing. if create console app, writes console, can't figure out how hide (and if did hide it, write command prompt window?)... how do this? just create standard console application. callers responsibility hide window caused program (from how run c# console application console hidden ): system.diagnostics.processstartinfo start = new system.diagnostics.processstartinfo(); start.filename = dir + @"\myprocesstostart.exe"; start.windowstyle = system.diagnostics.processwindowstyle.hidden;
Read more

c++ - Convert big endian to little endian when reading from a binary file -

-
this question has answer here: how convert between big-endian , little-endian values in c++? 28 answers i've been looking around how convert big-endian little-endians. didn't find solve problem. seem there's many way can conversion. anyway following code works ok in big-endian system. how should write conversion function work on little-endian system well? this homework, since systems @ school running big-endian system. it's got curious , wanted make work on home computer also #include <iostream> #include <fstream> using namespace std; int main() { ifstream file; file.open("file.bin", ios::in | ios::binary); if(!file) cerr << "not able read" << endl; else { cout << "opened" << endl; int i_var; double d_var; while(!file.eof()) {...
Read more

openssl - Load PKCS#8 binary key into Ruby -

-
i'm trying load particular private key encoded in binary der format ( pkcs#8 ) ruby. however, openssl::pkey won't recognize it. can make work doing console work , transforming pem so: openssl pkcs8 -inform der -in file.key -passin pass:xxxxxxxx >private_key.pem after this, key can correctly read. however, since whole process done in memory instead of writing , reading files. so question is: possible load private keys binary encoded der format ruby/openssl? thank time, fernando yes, can indirectly load pkcs#8 der-encoded private keys using ruby openssl. openssl::pkey::rsa.new handle pem-formatted pkcs#8, easy read binary der , convert pem-formatted string , load string. for example, these der-encoded private keys: $ openssl genrsa | openssl pkcs8 -topk8 -outform der \ -nocrypt -out pkcs8.key $ openssl genrsa | openssl pkcs8 -topk8 -outform der \ -v2 des3 -passout pass:secret -out pkcs8_des3.key you can this: require 'open...
Read more