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Re: DBI.pm: composing and debugging MySql placeholders

by neilwatson (Priest)
on Oct 13, 2015 at 16:05 UTC ( #1144720=note: print w/replies, xml ) Need Help??


in reply to DBI.pm: composing and debugging MySql placeholders

Try DBI tracing, or turn up the database's own logging.

Neil Watson
watson-wilson.ca

  • Comment on Re: DBI.pm: composing and debugging MySql placeholders

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Re^2: DBI.pm: composing and debugging MySql placeholders
by LanX (Sage) on Oct 13, 2015 at 17:41 UTC
    Thanks!

    I experimented, and the following

    { local $sth->{TraceLevel} = "2|SQL"; $rv = $sth->execute(@args) or die $sth->errstr; }

    Produced the desired output, unfortunately surrounded by some verbose lines (see second paragraph). Reducing the trace level eliminated the information.

    DBI::st=HASH(0x2910b18) trace level set to 0x100/2 (DBI @ 0x0/0) i +n DBI 1.623-ithread (pid 7420) -> execute for DBD::mysql::st (DBI::st=HASH(0x2910ab8)~0x2910b18 ' +xLangsdorf') thr#309f18 Called: dbd_bind_ph -> dbd_st_execute for 02497600 >- dbd_st_free_result_sets <- dbd_st_free_result_sets RC -1 <- dbd_st_free_result_sets mysql_st_internal_execute MYSQL_VERSION_ID 50147 >parse_params statement SELECT * FROM ksr_bf_utf8.t_user_portal WHERE f_client = ? Binding parameters: SELECT * FROM ksr_bf_utf8.t_user_portal WHERE f_client = 'xLangsdorf' <- dbd_st_execute returning imp_sth->row_num 19 <- execute= ( 19 ) [1 items] at placeholder.pl line 57 -> STORE for DBD::mysql::st (DBI::st=HASH(0x2910b18)~INNER 'TraceL +evel' 0) thr#309f18 -> dbd_st_STORE_attrib for 02497600, key TraceLevel <- dbd_st_STORE_attrib for 02497600, result 0 <- STORE= ( 1 ) [1 items] at placeholder.pl line 56

    So I'd need to redirect the trace to a variable and parse the output for a paragraph starting with 'Binding parameters: ' in case of error...

    something like

    open my $trace_fh, ">", \ my $trace_out; { $sth->trace("2|SQL", $trace_fh ); $rv = $sth->execute(@args) or die parse($trace_out) . "\n" .$sth->errstr; }

    Thanks again! :)

    Cheers Rolf
    (addicted to the Perl Programming Language and ☆☆☆☆ :)
    Je suis Charlie!

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