How do you get DBI (mysql, specifically) fetchall_arrayref({}) to give you both the table AND column name from a SELECT. It always seems to use only the column names, even if you explicit ask for specific "table.column"s. $sth->{NAME*} does not have the originating table for each column either. $dbh->{FetchHashKeyName} might be useful. I must know the truth! See example below. Thanks, 

use DBI;
use Data::Dumper;

my $dbh = DBI->connect(
               'DBI:mysql:database=test;host=localhost', 
               'test', 
               'test',
               { RaiseError => 1 }
               );

sub init
{
  # $dbh->do("DROP TABLE t;");
  $dbh->do("CREATE TABLE t (id INT, x INT, name CHAR(2));");
  $dbh->do("INSERT INTO t (id, x, name) VALUES (1, 0, 'a'), (2, 1, 'b'
+), (3, 1, 'c'), (4, 2, 'd');");
}


sub doit
{
  my ($cols) = @_;

  my $COLS = join(', ', @$cols);
  my $sql = "SELECT $COLS FROM t AS a, t AS b WHERE a.name = 'b' AND b
+.name = 'c' AND a.x = b.x";
  my $sth = $dbh->prepare($sql);

  my $rv = $sth->execute();

  my $results = $sth->fetchall_arrayref({});

  print Data::Dumper->new([ $sql, $results ], [qw( $sql $results)])->D
+ump(), "\n";
}


init();

doit(['*']);
doit(['a.*', 'b.*']);
doit(['a.id', 'a.x', 'a.name', 'b.id', 'b.x', 'b.name']);

1;

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In reply to DBI table AND column names in fetchall_arrayref({})? by kstephens

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