in reply to Contents of array - Perl DBI question
Because push(@fields_B, \@record_B); pushes an array reference to @fields_B, and that's how array references stringify. See perllol, perlreftut, perlref, perldsc.
Als you probably should write
while(my @row_B = $sth_B->fetchrow_array()) {
...
}
to avoid over-sharing of @row_B.
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