如何使用Perl,DBI和占位符插入PostgreSQL？

Question

我试图在pSQL表中插入一行,指定键和值作为占位符:

my @keys = keys %db_entr;                                                            
my @vals = values %db_entr;

my @items = (@keys, @values);

my $dbh = DBI->connect("DBI:Pg:dbname=testdb;host=localhost", "username", 'password', {'RaiseError' => 1});                                                                   
my $sth = $dbh->prepare("INSERT INTO grid ( ?, ?, ? ) values ( ?, ?, ? )");
my $rows = $sth->execute(@items);                                                    
print "$rows effected\n";

但是,无论我做什么,这都给了我一个错误:

DBD::Pg::st execute failed: ERROR:  syntax error at or near "$1"
LINE 1: INSERT INTO grid ( $1, $2, ...
                           ^ at ./file.pl line 262, <STDIN> line 11.

有没有人知道我可能做错了什么？

Answer 1

您不能使用占位符作为列名,如下所示:

INSERT INTO grid (?, ?, ?) VALUES (?, ?, ?)

您必须明确指定列名称,并且只能使用占位符作为值:

INSERT INTO grid (x, y, z) VALUES (?, ?, ?)