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Re^2: dbi placeholders

by Tux (Canon)
on Aug 06, 2014 at 06:04 UTC ( [id://1096390]=note: print w/replies, xml ) Need Help??


in reply to Re: dbi placeholders
in thread dbi placeholders

Still rather inefficient. Why not use bind_columns?

my %foo; # Store here when fetching fields my $sth1 = $dbh->prepare ("select * from foo"); $sth1->execute; # added this line after [poj] spotting it was missing # store foo.blah into $foo{blah} $sth1->bind_columns (\@foo{@{$sth1->{NAME_lc}}}); my $sth2 = $dbh->prepare ("insert into bar (ape, monkey) values (?, ?) +"); # foo.morg => bar.ape, foo.jume => bar.monkey $sth2->bind_columns (\@foo{qw( morg jume )}); while ($sth1->fetch) { $sth2->execute; }

If both tables have the same fields

my %rec; my $sth1 = $dbh->prepare ("select * from foo"); my @fields = @{$sth1->{NAME_lc}}; $sth1->bind_columns (\@rec{@{$sth1->{NAME_lc}}}); my $sth2 = do { local $" = ", "; $dbh->prepare ("insert into bar (@fields) values (@{[('?')x@fields +]})"); }; $sth2->bind_columns (\@rec{@fields}); while ($sth1->fetch) { $sth2->execute; }

Enjoy, Have FUN! H.Merijn

Replies are listed 'Best First'.
Re^3: dbi placeholders
by fionbarr (Friar) on Aug 06, 2014 at 13:56 UTC
    my %rec; my $sth1 = $dbh_0->prepare ("select * from production.computersystem") +; my @fields = @{$sth1->{NAME_lc}}; $sth1->bind_columns (\@rec{@{$sth1->{NAME_lc}}}); my $sth2 = do { local $" = ", "; my $sql = "insert into barrycomputersystem (@fields) values (@{ +[('?')x@fields]})"; $dbh_1->prepare ($sql); }; $sth2->bind_columns (\@rec{@fields}); while ($sth1->fetch) { $sth2->execute; }
    this is very interesting but get an error: 'statement has no result column' in the $sth2->bind_columns line

      Sorry, my bad. bind_columns doesn't work on inserts :(

      # Delete the bind_columns line for sth2 while ($sth1->fetch) { $sth2->execute (@rec{@fields}); }

      Enjoy, Have FUN! H.Merijn
        deleted the bind but another error: fetch failed: Function sequence error (SQL-HY010)

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