Creating a function for your needs can be as simple as:

1. Write this code in a file called myfun.test:

CREATE OR REPLACE PROCEDURAL LANGUAGE plperlu;
ALTER PROCEDURAL LANGUAGE plperlu OWNER TO postgres;
CREATE OR REPLACE FUNCTION mytest(text) RETURNS text
  LANGUAGE plperlu
  AS $_X$
  my $data = $_[0];
  my $string = $data." -->from mytest\n"; 
  return $string;
$_X$;

[download]

(Of course you can have as many arguments and return types you want in your function's definition.)

2. Insert/replace this function in your db by issuing the command line:

# \i /path/to/myfun.test

3. Run the test (given a table called data and a text field called f1):

# select mytest(f1) from data limit 10

And that's it... When your function will be ready you can dump/restore it permanently into your db if you want.

In reply to Re^3: Help on selecting and deleting many records in a DB. by Anonymous Monk
in thread Help on selecting and deleting many records in a DB. by neilwatson

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