Re: PLPGSQL - PHP data querying

Ganesh Laxmanmurthy wrote:
> Dear All:
>
> Regarding PHP & PLPGSQL Programming. I am new to
> PLPGSQL.
>
> I wish someone suggest me the solution for the below
> requirement even though it is very simple as I am new
> to the subject and could not find an answer which I
> can understand.
>
> I have a table by name 'users' with several columns.
>
> I want to query "select * from users' from PHP to
> Postgresql through PLPGSQL.
>
> Therefore I need
>
> 1. The practical syntax for the PLPGSQL function
>
> 2. The practical syntax for calling and displaying of
> the returned recordset from PHP.
>
> With the above I would be able to develop futher
> programs.
>
> I would be thankful for the same.

here is some untested code, but will give one way of doing it (note
there is also no great error checking in it):


CREATE TABLE users (id int, name text);

CREATE OR REPLACE FUNCTION my_function() RETURNS SETOF record AS '
 DECLARE
    _record record;

 BEGIN

      FOR _record IN SELECT * FROM users
       LOOP
         RETURN NEXT _record;
       END LOOP;

       RETURN;
 END;

' LANGUAGE 'plpgsql';


############################# PHP code #############################

$connstr = "dbname=".$dbname." host=".$host." port=".$port."
user=".$user." password=".$passwd;

$dbh = pg_connect($connstr);


$sql = "SELECT * FROM my_function() AS (id int, name text);";

if($stat = pg_exec($dbh, $sql);)
   {
    if($rows = pg_numrows($stat))
       {
        for($i=0; $i < $rows; $i++)
            {
             $data = pg_fetch_array($stat, $i);

             echo $data['id']." -- ".$data['name']."<br>";
            }
       }
   }

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