This is something that has bugged me a for aa whil, under what circumstances is the no strict 'refs' error triggered. I have the following concrete example.

this works


    my $transref_chksql= <<~ 'SQLSTR';
     SELECT CASE WHEN EXISTS (SELECT * FROM pg_class 
    WHERE relkind = 'S' AND relname= 'encode_transref_seqm') 
        THEN 'transref_seq_add'
    ELSE 'ignore' END
    SQLSTR
    my $transseqchk->{transchk}=
        ($dbh->selectrow_array($transref_chksql))[0];
    my %actionsw;
    $actionsw{transref_seq_add}->{cmd}=sub{
        (my $encode_transref_seqmsql= <<~ 'SQLSTR');
        CREATE SEQUENCE IF NOT EXISTS transref_seqm 
        Start 0 minvalue 0 OWNED BY encodes.fileid
        SQLSTR
        $dbh->do($encode_transref_seqmsql);
    };
        if ($actionsw{$transseqchk->{transchk}}->{cmd}){
        &{$actionsw{$transseqchk->{transchk}}->{cmd}};
        }

[download]
This triggers strict 'refs' 
        my %transseqchk;
    my $transref_chksql= <<~ 'SQLSTR';
        SELECT CASE WHEN EXISTS (SELECT * FROM pg_class 
            WHERE relkind = 'S' AND relname= 'encode_transref_seqm') 
                        THEN 'transref_seq_add'
            ELSE 'ignore' END
    SQLSTR
    my $transseqchk->{transchk}=
        ($dbh->selectrow_array($transref_chksql))[0];

    $transseqchk->{transref_seq_add}->{cmd}=sub{
         (my $encode_transref_seqmsql= <<~ 'SQLSTR');
        CREATE SEQUENCE IF NOT EXISTS transref_seqm 
        Start 0 minvalue 0 OWNED BY encodes.fileid
        SQLSTR
        $dbh->do($encode_transref_seqmsql);
    };
        
        if ($transseqchk->{transchk}->{cmd}){
        &{$transseqchk->{transchk}->{cmd}};
        }

[download]
The only difference is a further level of hash in the working example

In reply to When is strict 'refs triggered by redtux

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