reports/issues_stats.pl

   1 #!/usr/bin/perl
   2
   3
   4 # Copyright 2000-2002 Katipo Communications
   5 #
   6 # This file is part of Koha.
   7 #
   8 # Koha is free software; you can redistribute it and/or modify it under the
   9 # terms of the GNU General Public License as published by the Free Software
  10 # Foundation; either version 2 of the License, or (at your option) any later
  11 # version.
  12 #
  13 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
  14 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  15 # A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License along
  18 # with Koha; if not, write to the Free Software Foundation, Inc.,
  19 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20
  21 use strict;
  22 #use warnings; FIXME - Bug 2505
  23
  24 use CGI;
  25 use Date::Manip;
  26
  27 use C4::Auth;
  28 use C4::Debug;
  29 use C4::Context;
  30 use C4::Branch; # GetBranches
  31 use C4::Koha;
  32 use C4::Output;
  33 use C4::Circulation;
  34 use C4::Reports;
  35 use C4::Dates qw/format_date format_date_in_iso/;
  36 use C4::Members;
  37
  38 =head1 NAME
  39
  40 plugin that shows circulation stats
  41
  42 =head1 DESCRIPTION
  43
  44 =over 2
  45
  46 =cut
  47
  48 # my $debug = 1;        # override for now.
  49 my $input = new CGI;
  50 my $fullreportname = "reports/issues_stats.tmpl";
  51 my $do_it    = $input->param('do_it');
  52 my $line     = $input->param("Line");
  53 my $column   = $input->param("Column");
  54 my @filters  = $input->param("Filter");
  55 $filters[0]=format_date_in_iso($filters[0]);
  56 $filters[1]=format_date_in_iso($filters[1]);
  57 my $podsp    = $input->param("DisplayBy");
  58 my $type     = $input->param("PeriodTypeSel");
  59 my $daysel   = $input->param("PeriodDaySel");
  60 my $monthsel = $input->param("PeriodMonthSel");
  61 my $calc     = $input->param("Cellvalue");
  62 my $output   = $input->param("output");
  63 my $basename = $input->param("basename");
  64 my ($template, $borrowernumber, $cookie) = get_template_and_user({
  65         template_name => $fullreportname,
  66         query => $input,
  67         type => "intranet",
  68         authnotrequired => 0,
  69         flagsrequired => {reports => '*'},
  70         debug => 0,
  71 });
  72 our $sep     = $input->param("sep");
  73 $sep = "\t" if ($sep eq 'tabulation');
  74 $template->param(do_it => $do_it,
  75         DHTMLcalendar_dateformat => C4::Dates->DHTMLcalendar(),
  76 );
  77
  78 my $itemtypes = GetItemTypes();
  79 my $categoryloop = GetBorrowercategoryList;
  80
  81 my $ccodes    = GetKohaAuthorisedValues("items.ccode");
  82 my $locations = GetKohaAuthorisedValues("items.location");
  83
  84 my $Bsort1 = GetAuthorisedValues("Bsort1");
  85 my $Bsort2 = GetAuthorisedValues("Bsort2");
  86 my ($hassort1,$hassort2);
  87 $hassort1=1 if $Bsort1;
  88 $hassort2=1 if $Bsort2;
  89
  90
  91 if ($do_it) {
  92 # Displaying results
  93         my $results = calculate($line, $column, $podsp, $type, $daysel, $monthsel, $calc, \@filters);
  94         if ($output eq "screen"){
  95 # Printing results to screen
  96                 $template->param(mainloop => $results);
  97                 output_html_with_http_headers $input, $cookie, $template->output;
  98         } else {
  99 # Printing to a csv file
 100         print $input->header(-type => 'application/vnd.sun.xml.calc',
 101                             -encoding    => 'utf-8',
 102                             -attachment=>"$basename.csv",
 103                             -filename=>"$basename.csv" );
 104                 my $cols  = @$results[0]->{loopcol};
 105                 my $lines = @$results[0]->{looprow};
 106 # header top-right
 107                 print @$results[0]->{line} ."/". @$results[0]->{column} .$sep;
 108 # Other header
 109                 foreach my $col ( @$cols ) {
 110                         print $col->{coltitle}.$sep;
 111                 }
 112                 print "Total\n";
 113 # Table
 114                 foreach my $line ( @$lines ) {
 115                         my $x = $line->{loopcell};
 116                         print $line->{rowtitle}.$sep;
 117                         print map {$_->{value}.$sep} @$x;
 118                         print $line->{totalrow}, "\n";
 119                 }
 120 # footer
 121         print "TOTAL";
 122         $cols = @$results[0]->{loopfooter};
 123                 print map {$sep.$_->{totalcol}} @$cols;
 124         print $sep.@$results[0]->{total};
 125         }
 126         exit(1); # exit either way after $do_it
 127 }
 128
 129 my $dbh = C4::Context->dbh;
 130 my @values;
 131 my %labels;
 132 my %select;
 133
 134 # create itemtype arrayref for <select>.
 135 my @itemtypeloop;
 136 for my $itype ( sort {$itemtypes->{$a}->{description} cmp $itemtypes->{$b}->{description}} keys(%$itemtypes)) {
 137         push @itemtypeloop, { code => $itype , description => $itemtypes->{$itype}->{description} } ;
 138 }
 139
 140     # location list
 141 my @locations;
 142 foreach (sort keys %$locations) {
 143         push @locations, { code => $_, description => "$_ - " . $locations->{$_} };
 144 }
 145
 146 my @ccodes;
 147 foreach (sort {$ccodes->{$a} cmp $ccodes->{$b}} keys %$ccodes) {
 148         push @ccodes, { code => $_, description => $ccodes->{$_} };
 149 }
 150
 151 my $CGIextChoice=CGI::scrolling_list(
 152         -name     => 'MIME',
 153         -id       => 'MIME',
 154         -values   => ['CSV'], # FIXME translation
 155         -size     => 1,
 156         -multiple => 0 );
 157
 158 my $CGIsepChoice=GetDelimiterChoices;
 159
 160 $template->param(
 161         categoryloop => $categoryloop,
 162         itemtypeloop => \@itemtypeloop,
 163         locationloop => \@locations,
 164            ccodeloop => \@ccodes,
 165           branchloop => GetBranchesLoop(C4::Context->userenv->{'branch'}),
 166         hassort1=> $hassort1,
 167         hassort2=> $hassort2,
 168         Bsort1 => $Bsort1,
 169         Bsort2 => $Bsort2,
 170         CGIextChoice => $CGIextChoice,
 171         CGIsepChoice => $CGIsepChoice,
 172 );
 173 output_html_with_http_headers $input, $cookie, $template->output;
 174
 175 sub calculate {
 176         my ($line, $column, $dsp, $type,$daysel,$monthsel ,$process, $filters) = @_;
 177         my @loopfooter;
 178         my @loopcol;
 179         my @loopline;
 180         my @looprow;
 181         my %globalline;
 182         my $grantotal =0;
 183 # extract parameters
 184         my $dbh = C4::Context->dbh;
 185
 186 # Filters
 187 # Checking filters
 188 #
 189         my @loopfilter;
 190         for (my $i=0;$i<=10;$i++) {
 191                 my %cell;
 192                 (@$filters[$i]) or next;
 193         if (($i==1) and (@$filters[$i-1])) {
 194             $cell{err} = 1 if (@$filters[$i]<@$filters[$i-1]) ;
 195         }
 196             # format the dates filters, otherwise just fill as is
 197         if ($i>=2) {
 198                 $cell{filter} = @$filters[$i];
 199         } else {
 200                 $cell{filter} = format_date(@$filters[$i]);
 201                 }
 202                 $cell{crit} =
 203                 ($i==0) ? "Period From"        :
 204                 ($i==1) ? "Period To"          :
 205                 ($i==2) ? "Patron Category ="  :
 206                 ($i==3) ? "Item Type ="        :
 207                 ($i==4) ? "Library ="          :
 208                 ($i==5) ? "Collection ="       :
 209                 ($i==6) ? "Location ="         :
 210                 ($i==7) ? "Item callnumber >=" :
 211                 ($i==8) ? "Item callnumber <"  :
 212                 ($i==9) ? "sort1 ="            :
 213                 ($i==10)? "sort2 ="            : "UNKNOWN FILTER ($i)";
 214                 # FIXME - no translation mechanism !
 215                 push @loopfilter, \%cell;
 216     }
 217         push @loopfilter,{crit=>"Event",       filter=>$type    };
 218         push @loopfilter,{crit=>"Display by",  filter=>$dsp     } if ($dsp);
 219         push @loopfilter,{crit=>"Select Day",  filter=>$daysel  } if ($daysel);
 220         push @loopfilter,{crit=>"Select Month",filter=>$monthsel} if ($monthsel);
 221
 222         my @linefilter;
 223         $debug and warn "filtres ". join "|", @filters;
 224         my ($colsource, $linesource);
 225         $linefilter[1] = @$filters[1] if ($line =~ /datetime/);
 226         $linefilter[0] = ($line =~ /datetime/) ? @$filters[0]  :
 227                                          ($line =~ /category/) ? @$filters[2]  :
 228                                          ($line =~ /itemtype/) ? @$filters[3]  :
 229                                          ($line =~ /branch/  ) ? @$filters[4]  :
 230                                          ($line =~ /ccode/   ) ? @$filters[5]  :
 231                                          ($line =~ /location/) ? @$filters[6]  :
 232                                          ($line =~ /sort1/   ) ? @$filters[9]  :
 233                                          ($line =~ /sort2/   ) ? @$filters[10] : undef ;
 234         if ($line =~ /ccode/ or $line =~ /location/) {
 235                 $linesource = 'items';
 236         }
 237
 238         my @colfilter;
 239         $colfilter[1] = @$filters[1] if ($column =~ /datetime/);
 240         $colfilter[0] = ($column =~ /datetime/) ? @$filters[0]  :
 241                                         ($column =~ /category/) ? @$filters[2]  :
 242                                         ($column =~ /itemtype/) ? @$filters[3]  :
 243                                         ($column =~ /branch/  ) ? @$filters[4]  :
 244                                         ($column =~ /ccode/   ) ? @$filters[5]  :
 245                                         ($column =~ /location/) ? @$filters[6]  :
 246                                         ($column =~ /sort1/   ) ? @$filters[9]  :
 247                                         ($column =~ /sort1/   ) ? @$filters[10] : undef ;
 248         if ($column =~ /ccode/ or $column =~ /location/) {
 249                 $colsource = 'items';
 250         }
 251 # 1st, loop rows.
 252         my $linefield;
 253         if ($line =~ /datetime/) {
 254                 # by Day, Month or Year (1,2,3 respectively)
 255                 $linefield = ($dsp == 1) ? "  dayname($line)" :
 256                                          ($dsp == 2) ? "monthname($line)" :
 257                                          ($dsp == 3) ? "     Year($line)" :
 258                                         'date_format(`datetime`,"%Y-%m-%d")'; # Probably should be left alone or passed through C4::Dates
 259         } else {
 260                 $linefield = $line;
 261         }
 262         my $lineorder = ($linefield =~ /dayname/) ? "weekday($line)" :
 263                                         ($linefield =~ /^month/ ) ? "  month($line)" : $linefield;
 264
 265         my $strsth = "SELECT distinctrow $linefield FROM statistics, ";
 266                 # get stats on items if ccode or location, otherwise borrowers.
 267         $strsth .= ($linesource eq 'items' ) ?
 268                         " items     WHERE (statistics.itemnumber=items.itemnumber) " :
 269                         " borrowers WHERE (statistics.borrowernumber=borrowers.borrowernumber) ";
 270         $strsth .= " AND $line is not null ";
 271
 272         if ($line =~ /datetime/) {
 273                 if ($linefilter[1] and ($linefilter[0])) {
 274                         $strsth .= " AND $line between ? AND ? ";
 275                 } elsif ($linefilter[1]) {
 276                         $strsth .= " AND $line < ? ";
 277                 } elsif ($linefilter[0]) {
 278                 $strsth .= " AND $line > ? ";
 279                 }
 280                 $strsth .= " AND type ='".$type."' " if $type;
 281                 $strsth .= " AND   dayname(datetime) ='".   $daysel ."' " if $daysel;
 282                 $strsth .= " AND monthname(datetime) ='". $monthsel ."' " if $monthsel;
 283         } elsif ($linefilter[0]) {
 284                 $linefilter[0] =~ s/\*/%/g;
 285                 $strsth .= " AND $line LIKE ? ";
 286         }
 287         $strsth .=" group by $linefield order by $lineorder ";
 288         $debug and warn $strsth;
 289         push @loopfilter, {crit=>'SQL =', sql=>1, filter=>$strsth};
 290         my $sth = $dbh->prepare( $strsth );
 291         if ((@linefilter) and ($linefilter[1])){
 292                 $sth->execute($linefilter[0],$linefilter[1]);
 293         } elsif ($linefilter[0]) {
 294                 $sth->execute($linefilter[0]);
 295         } else {
 296                 $sth->execute;
 297         }
 298
 299         while (my ($celvalue) = $sth->fetchrow) {
 300                 my %cell = (rowtitle => $celvalue, totalrow => 0); # we leave 'rowtitle' as hash key (used when filling the table), and add coltitle_display
 301                 $cell{rowtitle_display} =
 302                         ($line =~ /ccode/   ) ? $ccodes->{$celvalue}    :
 303                         ($line =~ /location/) ? $locations->{$celvalue} :
 304                         ($line =~ /itemtype/) ? $itemtypes->{$celvalue}->{description} :
 305                         $celvalue; # default fallback
 306                 if ($line =~ /sort1/) {
 307                         foreach (@$Bsort1) {
 308                                 ($celvalue eq $_->{authorised_value}) or next;
 309                                 $cell{rowtitle_display} = $_->{lib} and last;
 310                         }
 311                 } elsif ($line =~ /sort2/) {
 312                         foreach (@$Bsort2) {
 313                                 ($celvalue eq $_->{authorised_value}) or next;
 314                                 $cell{rowtitle_display} = $_->{lib} and last;
 315                         }
 316                 } elsif ($line =~ /category/) {
 317                         foreach (@$categoryloop) {
 318                                 ($celvalue eq $_->{categorycode}) or next;
 319                                 $cell{rowtitle_display} = $_->{description} and last;
 320                         }
 321                 }
 322                 push @loopline, \%cell;
 323         }
 324
 325 # 2nd, loop cols.
 326         my $colfield;
 327         my $colorder;
 328         if ($column =~ /datetime/) {
 329                 #Display by Day, Month or Year (1,2,3 respectively)
 330                 $colfield = ($dsp == 1) ? "  dayname($column)" :
 331                                         ($dsp == 2) ? "monthname($column)" :
 332                                         ($dsp == 3) ? "     Year($column)" :
 333                                         'date_format(`datetime`,"%Y-%m-%d")'; # Probably should be left alone or passed through C4::Dates
 334         } else {
 335                 $colfield = $column;
 336         }
 337         $colorder = ($colfield =~ /dayname/) ? "weekday($column)" :
 338                                 ($colfield =~ /^month/ ) ? "  month($column)" : $colfield;
 339         my $strsth2 = "SELECT distinctrow $colfield FROM statistics, ";
 340         # get stats on items if ccode or location, otherwise borrowers.
 341         $strsth2 .= ($colsource eq 'items' ) ?
 342                                 "items     WHERE (statistics.itemnumber=items.itemnumber) " :
 343                                 "borrowers WHERE (statistics.borrowernumber=borrowers.borrowernumber) ";
 344         $strsth2 .= " AND $column IS NOT NULL ";
 345
 346         if ($column =~ /datetime/){
 347         if (($colfilter[1]) and ($colfilter[0])){
 348                         $strsth2 .= " AND $column BETWEEN ? AND ? " ;
 349         } elsif ($colfilter[1]) {
 350                         $strsth2 .= " AND $column < ? " ;
 351         } elsif ($colfilter[0]) {
 352                         $strsth2 .= " AND $column > ? " ;
 353         }
 354         $strsth2 .= " AND                type ='". $type     ."' " if $type;
 355         $strsth2 .= " AND   dayname(datetime) ='". $daysel   ."' " if $daysel;
 356         $strsth2 .= " AND monthname(datetime) ='". $monthsel ."' " if $monthsel;
 357     } elsif ($colfilter[0]) {
 358         $colfilter[0] =~ s/\*/%/g;
 359         $strsth2 .= " AND $column LIKE ? " ;
 360     }
 361         $strsth2 .=" GROUP BY $colfield ORDER BY $colorder ";
 362
 363         my $sth2 = $dbh->prepare($strsth2);
 364         push @loopfilter, {crit=>'SQL =', sql=>1, filter=>$strsth2};
 365         if ((@colfilter) and ($colfilter[1])){
 366                 $sth2->execute($colfilter[0], $colfilter[1]);
 367         } elsif ($colfilter[0]) {
 368                 $sth2->execute($colfilter[0]);
 369         } else {
 370                 $sth2->execute;
 371         }
 372
 373         while (my ($celvalue) = $sth2->fetchrow) {
 374                 my %cell = (coltitle => $celvalue); # we leave 'coltitle' as hash key (used when filling the table), and add coltitle_display
 375                 $cell{coltitle_display} =
 376                         ($column =~ /ccode/   ) ?    $ccodes->{$celvalue} :
 377                         ($column =~ /location/) ? $locations->{$celvalue} :
 378                         ($column =~ /itemtype/) ? $itemtypes->{$celvalue}->{description} :
 379                         $celvalue; # default fallback
 380                 if ($column =~ /sort1/) {
 381                         foreach (@$Bsort1) {
 382                                 ($celvalue eq $_->{authorised_value}) or next;
 383                                 $cell{coltitle_display} = $_->{lib} and last;
 384                         }
 385                 } elsif ($column =~ /sort2/) {
 386                         foreach (@$Bsort2) {
 387                                 ($celvalue eq $_->{authorised_value}) or next;
 388                                 $cell{coltitle_display} = $_->{lib} and last;
 389                         }
 390                 } elsif ($column =~ /category/) {
 391                         foreach (@$categoryloop) {
 392                                 ($celvalue eq $_->{categorycode}) or next;
 393                                 $cell{coltitle_display} = $_->{description} and last;
 394                         }
 395                 }
 396                 push @loopcol, \%cell;
 397         }
 398
 399         #Initialization of cell values.....
 400         my %table;
 401         foreach my $row (@loopline) {
 402                 foreach my $col (@loopcol) {
 403                         $debug and warn " init table : $row->{rowtitle} ( $row->{rowtitle_display} ) / $col->{coltitle} ( $col->{coltitle_display} )  ";
 404                         $table{$row->{rowtitle}}->{$col->{coltitle}} = 0;
 405                 }
 406                 $table{$row->{rowtitle}}->{totalrow} = 0;
 407         }
 408
 409 # preparing calculation
 410     my $strcalc = "SELECT $linefield, $colfield, ";
 411         $strcalc .= ($process == 1) ? " COUNT(*) "                                 :
 412                                         ($process == 2) ? "(COUNT(DISTINCT borrowers.borrowernumber))" :
 413                                 ($process == 3) ? "(COUNT(DISTINCT statistics.itemnumber))"        : '';
 414         if ($process == 4) {
 415                 my $rqbookcount = $dbh->prepare("SELECT count(*) FROM items");
 416                 $rqbookcount->execute;
 417                 my ($bookcount) = $rqbookcount->fetchrow;
 418                 $strcalc .= "100*(COUNT(DISTINCT statistics.itemnumber))/ $bookcount " ;
 419         }
 420         $strcalc .= "
 421         FROM statistics
 422         LEFT JOIN borrowers ON statistics.borrowernumber=borrowers.borrowernumber
 423         ";
 424         $strcalc .= "LEFT JOIN items ON statistics.itemnumber=items.itemnumber "
 425         if ($linefield =~ /^items\./ or $colfield =~ /^items\./ or ($colsource eq 'items')
 426             ||@$filters[5]||@$filters[6]||@$filters[7]||@$filters[8]);
 427
 428         $strcalc .= "WHERE 1=1 ";
 429         @$filters = map {defined($_) and s/\*/%/g; $_} @$filters;
 430         $strcalc .= " AND statistics.datetime > '"       . @$filters[0] ."'" if (@$filters[0] );
 431         $strcalc .= " AND statistics.datetime < '"       . @$filters[1] ."'" if (@$filters[1] );
 432         $strcalc .= " AND borrowers.categorycode LIKE '" . @$filters[2] ."'" if (@$filters[2] );
 433         $strcalc .= " AND statistics.itemtype LIKE '"    . @$filters[3] ."'" if (@$filters[3] );
 434         $strcalc .= " AND statistics.branch LIKE '"      . @$filters[4] ."'" if (@$filters[4] );
 435         $strcalc .= " AND items.ccode LIKE '"            . @$filters[5] ."'" if (@$filters[5] );
 436         $strcalc .= " AND items.location LIKE '"         . @$filters[6] ."'" if (@$filters[6] );
 437         $strcalc .= " AND items.itemcallnumber >='"      . @$filters[7] ."'" if (@$filters[7] );
 438         $strcalc .= " AND items.itemcallnumber <'"       . @$filters[8] ."'" if (@$filters[8] );
 439         $strcalc .= " AND borrowers.sort1 LIKE '"        . @$filters[9] ."'" if (@$filters[9] );
 440         $strcalc .= " AND borrowers.sort2 LIKE '"        . @$filters[10]."'" if (@$filters[10]);
 441         $strcalc .= " AND dayname(datetime) LIKE '"      . $daysel      ."'" if ($daysel  );
 442         $strcalc .= " AND monthname(datetime) LIKE '"    . $monthsel    ."'" if ($monthsel);
 443         $strcalc .= " AND statistics.type LIKE '"        . $type        ."'" if ($type    );
 444
 445         $strcalc .= " GROUP BY $linefield, $colfield order by $lineorder,$colorder";
 446         ($debug) and warn $strcalc;
 447         my $dbcalc = $dbh->prepare($strcalc);
 448         push @loopfilter, {crit=>'SQL =', sql=>1, filter=>$strcalc};
 449         $dbcalc->execute;
 450         my ($emptycol,$emptyrow);
 451         while (my ($row, $col, $value) = $dbcalc->fetchrow) {
 452                 ($debug) and warn "filling table $row / $col / $value ";
 453                 unless (defined $col) {
 454                         $emptycol = 1;
 455                         $col = "zzEMPTY" ;
 456                 }
 457                 unless (defined $row) {
 458                         $emptyrow = 1;
 459                         $row = "zzEMPTY";
 460                 }
 461                 $table{$row}->{$col}     += $value;
 462                 $table{$row}->{totalrow} += $value;
 463                 $grantotal += $value;
 464         }
 465         push @loopcol, {coltitle => "NULL", coltitle_display => 'NULL'} if ($emptycol);
 466         push @loopline,{rowtitle => "NULL", rowtitle_display => 'NULL'} if ($emptyrow);
 467
 468         foreach my $row (@loopline) {
 469                 my @loopcell;
 470                 #@loopcol ensures the order for columns is common with column titles
 471                 # and the number matches the number of columns
 472                 foreach my $col (@loopcol) {
 473                         my $value = $table{null_to_zzempty($row->{rowtitle})}->{null_to_zzempty($col->{coltitle})};
 474                         push @loopcell, {value => $value};
 475                 }
 476                 my $rowtitle = ($row->{rowtitle} eq "NULL") ? "zzEMPTY" : $row->{rowtitle};
 477                 push @looprow, {
 478                         'rowtitle_display' => $row->{rowtitle_display},
 479                         'rowtitle' => $rowtitle,
 480                         'loopcell' => \@loopcell,
 481                         'totalrow' => $table{$rowtitle}->{totalrow}
 482                 };
 483         }
 484         for my $col ( @loopcol ) {
 485                 my $total = 0;
 486                 foreach my $row (@looprow) {
 487                         $total += $table{null_to_zzempty($row->{rowtitle})}->{null_to_zzempty($col->{coltitle})};
 488                         $debug and warn "value added ".$table{$row->{rowtitle}}->{$col->{coltitle}}. "for line ".$row->{rowtitle};
 489                 }
 490                 push @loopfooter, {'totalcol' => $total};
 491         }
 492
 493         # the header of the table
 494         $globalline{loopfilter}=\@loopfilter;
 495         # the core of the table
 496         $globalline{looprow} = \@looprow;
 497         $globalline{loopcol} = \@loopcol;
 498         #       # the foot (totals by borrower type)
 499         $globalline{loopfooter} = \@loopfooter;
 500         $globalline{total}  = $grantotal;
 501         $globalline{line}   = $line;
 502         $globalline{column} = $column;
 503         return [(\%globalline)];
 504 }
 505
 506 sub null_to_zzempty ($) {
 507         my $string = shift;
 508         defined($string)    or  return 'zzEMPTY';
 509         ($string eq "NULL") and return 'zzEMPTY';
 510         return $string;         # else return the valid value
 511 }
 512
 513 1;