I'm currently thinking about SQL selects and how they can be constructed, so that I can construct them from subroutines and make things more modular.

Something like 

use strict;
sub make_query {
  my @clauses = @_;
  my $count   = 0;
  my $sql     = "select * from employees \n";
  foreach (@clauses) {
    if ($count > 0) { $sql .= ' AND ' }
    else { $sql .= ' WHERE ' }
    foreach ($_) {
      my @criteria = @{$_};
      if ($criteria[2] !~ /^\d+$/) {
        $criteria[2] = "'$criteria[2]'";
      }
      $sql .= " @criteria \n";
    }
    $count++;
  }
  return $sql;
}

my @array = (
  [ 'name',       '=',        'smith' ],
  [ 'salary',     '>',        '50000' ],
  [ 'department', 'NOT LIKE', 'eng%' ]
);

print make_query(@array);


###   select * from employees 
###    WHERE  name = 'smith' 
###    AND  salary > 50000 
###    AND  department NOT LIKE 'eng%'

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So am I missing something, going about it all wrong, making security holes for myself, working too hard, not working hard enough ... any thoughts? 


($_='kkvvttuubbooppuuiiffssqqffssmmiibbddllffss')
 =~y~b-v~a-z~s;                             print

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In reply to How do Monks programatically construct SQL selects by Cody Pendant

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