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 $sql;
}
my @array = (
[ 'name', '=', 'smith' ],
[ 'salary', '>', '50000' ],
[ 'department', 'NOT LIKE', 'eng%' ]
);
print make_query(@array);
### select * from employees
### WHERE name = 'smith'
### AND salary > 50000
### AND department NOT LIKE 'eng%'
So am I missing something, going about it all wrong, making security holes for myself, working too hard, not working hard enough ... any thoughts?
($_='kkvvttuubbooppuuiiffssqqffssmmiibbddllffss')
=~y~b-v~a-z~s; print
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