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;
    }

[download]

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;
    }

[download]

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;
    }

    [download]
    this is very interesting but get an error: 'statement has no result column' in the $sth2->bind_columns line
[reply]
[d/l]

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

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

      [download]

      Enjoy, Have FUN! H.Merijn
[reply]
[d/l]
[select]
        deleted the bind but another error: fetch failed: Function sequence error (SQL-HY010)
[reply]

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