Guessing from reading the docs (!) but it looks like selectall_hashref() is executed using the DB handle, so your code might better be: 
  my $hash = $dbconn->selectall_hashref($sql_statement);

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You may have been led astray by the talk of preparing a statement ahead of time, but even then you still use the DB handle. 
  my $sth  = $dbconn->prepare($sql_statement);
      .   .   .   .   .   .   .
  my $hash = $dbconn->selectall_hashref($sth);

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As for setting the valuable RaiseError flag, it looks like you'll have to do that on the DB handle when using selectall_hashref, perhaps something like: 
  {
    local $dbconn->{RaiseError} = 1;
    my $hash = $dbconn->selectall_hashref($sql_statement);
      .   .   .   .   .   .   .
  }

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Go back and read the DBI docs whenever something goes 'wrong' - sometimes it takes me a couple "read again"s before it sinks in to my flat file head.

In reply to Re^3: Result set into array by shenme
in thread Result set into array by novicepl

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