Re^2: Sql table names

My apologies, jZed, and thanks for replying.

Each key of the hash stores the table name and the name of column to be sorted (just in case sorting is required). The table names themselves are hardcoded and do not come from an external source. However, a table may be queried for its contents by supplying its name through an online form.

The hash I was talking about is as follows

%table =(
  members => [ qw(members id) ],
  emails => [ qw(emails member_id)]
};
[download]

So, instead of

SELECT * from members
[download]

It's

SELECT * from $table{'members'}[0]
[download]

Does hashing the table names make sense?

One use I could think of is verifying the table's existence when it's being queried (as in an web application).

Comment on Re^2: Sql table names Select or Download Code

Replies are listed 'Best First'.
Re^3: Sql table names by jZed (Prior) on Aug 16, 2004 at 07:32 UTC
Now that I see what you're doing, yes, I think some kind of a hash makes sense. You wrote: a table may be queried for its contents by supplying its name through an online form. In that case, you definitely want to check the name against the hash to make sure it's a table you want users to be able to access. You may also want something like this, depending on your needs: `my @tables = ( {name=>members,cols=>[qw(members id)]}, {name=>emails,cols=>[qw(emails member_id)]}, ); my $sql = "SELECT " . join(',',@{$tables[0]->{cols}}) . " FROM " . $tables[0]->{name} ;` [download] Eventually you might consider Class::DBI which provides some ready-made shortcuts for this kind of thing.	[reply] [d/l]

Replies are listed 'Best First'.

Re^3: Sql table names
by jZed (Prior) on Aug 16, 2004 at 07:32 UTC

a table may be queried for its contents by supplying its name through an online form.

my @tables = ( 
  {name=>members,cols=>[qw(members id)]},
  {name=>emails,cols=>[qw(emails member_id)]},
);
my $sql = "SELECT "
        . join(',',@{$tables[0]->{cols}})
        . " FROM "
        . $tables[0]->{name}
        ;
[download]

[reply]
[d/l]