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 with
  18 # Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  19 # Suite 330, Boston, MA  02111-1307 USA
  20
  21 use strict;
  22
  23 use CGI;
  24 use Date::Manip;
  25
  26 use C4::Auth;
  27 use C4::Debug;
  28 use C4::Context;
  29 use C4::Branch; # GetBranches
  30 use C4::Koha;
  31 use C4::Output;
  32 use C4::Circulation;
  33 use C4::Reports;
  34 use C4::Dates qw/format_date format_date_in_iso/;
  35 use C4::Members;
  36
  37 =head1 NAME
  38
  39 plugin that shows circulation stats
  40
  41 =head1 DESCRIPTION
  42
  43 =over 2
  44
  45 =cut
  46
  47 # my $debug = 1;        # override for now.
  48 my $input = new CGI;
  49 my $fullreportname = "reports/issues_stats.tmpl";
  50 my $do_it    = $input->param('do_it');
  51 my $line     = $input->param("Line");
  52 my $column   = $input->param("Column");
  53 my @filters  = $input->param("Filter");
  54 $filters[0]=format_date_in_iso($filters[0]);
  55 $filters[1]=format_date_in_iso($filters[1]);
  56 my $podsp    = $input->param("DisplayBy");
  57 my $type     = $input->param("PeriodTypeSel");
  58 my $daysel   = $input->param("PeriodDaySel");
  59 my $monthsel = $input->param("PeriodMonthSel");
  60 my $calc     = $input->param("Cellvalue");
  61 my $output   = $input->param("output");
  62 my $basename = $input->param("basename");
  63 my $mime     = $input->param("MIME");
  64 my ($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 # various
 152 my @mime = (C4::Context->preference("MIME"));
 153
 154 my $CGIextChoice=CGI::scrolling_list(
 155         -name     => 'MIME',
 156         -id       => 'MIME',
 157         -values   => \@mime,
 158         -size     => 1,
 159         -multiple => 0 );
 160
 161 my $CGIsepChoice=GetDelimiterChoices;
 162
 163 $template->param(
 164         categoryloop => $categoryloop,
 165         itemtypeloop => \@itemtypeloop,
 166         locationloop => \@locations,
 167            ccodeloop => \@ccodes,
 168           branchloop => GetBranchesLoop(C4::Context->userenv->{'branch'}),
 169         hassort1=> $hassort1,
 170         hassort2=> $hassort2,
 171         Bsort1 => $Bsort1,
 172         Bsort2 => $Bsort2,
 173         CGIextChoice => $CGIextChoice,
 174         CGIsepChoice => $CGIsepChoice,
 175 );
 176 output_html_with_http_headers $input, $cookie, $template->output;
 177
 178 sub calculate {
 179         my ($line, $column, $dsp, $type,$daysel,$monthsel ,$process, $filters) = @_;
 180         my @loopfooter;
 181         my @loopcol;
 182         my @loopline;
 183         my @looprow;
 184         my %globalline;
 185         my $grantotal =0;
 186 # extract parameters
 187         my $dbh = C4::Context->dbh;
 188
 189 # Filters
 190 # Checking filters
 191 #
 192         my @loopfilter;
 193         for (my $i=0;$i<=10;$i++) {
 194                 my %cell;
 195                 (@$filters[$i]) or next;
 196         if (($i==1) and (@$filters[$i-1])) {
 197             $cell{err} = 1 if (@$filters[$i]<@$filters[$i-1]) ;
 198         }
 199             # format the dates filters, otherwise just fill as is
 200         if ($i>=2) {
 201                 $cell{filter} = @$filters[$i];
 202         } else {
 203                 $cell{filter} = format_date(@$filters[$i]);
 204                 }
 205                 $cell{crit} =
 206                 ($i==0) ? "Period From"        :
 207                 ($i==1) ? "Period To"          :
 208                 ($i==2) ? "Patron Category ="  :
 209                 ($i==3) ? "Item Type ="        :
 210                 ($i==4) ? "Library ="          :
 211                 ($i==5) ? "Collection ="       :
 212                 ($i==6) ? "Location ="         :
 213                 ($i==7) ? "Item callnumber >=" :
 214                 ($i==8) ? "Item callnumber <"  :
 215                 ($i==9) ? "sort1 ="            :
 216                 ($i==10)? "sort2 ="            : "UNKNOWN FILTER ($i)";
 217                 # FIXME - no translation mechanism !
 218                 push @loopfilter, \%cell;
 219     }
 220         push @loopfilter,{crit=>"Event",       filter=>$type    };
 221         push @loopfilter,{crit=>"Display by",  filter=>$dsp     } if ($dsp);
 222         push @loopfilter,{crit=>"Select Day",  filter=>$daysel  } if ($daysel);
 223         push @loopfilter,{crit=>"Select Month",filter=>$monthsel} if ($monthsel);
 224
 225         my @linefilter;
 226         $debug and warn "filtres ". join "|", @filters;
 227         my ($colsource, $linesource);
 228         $linefilter[1] = @$filters[1] if ($line =~ /datetime/);
 229         $linefilter[0] = ($line =~ /datetime/) ? @$filters[0]  :
 230                                          ($line =~ /category/) ? @$filters[2]  :
 231                                          ($line =~ /itemtype/) ? @$filters[3]  :
 232                                          ($line =~ /branch/  ) ? @$filters[4]  :
 233                                          ($line =~ /ccode/   ) ? @$filters[5]  :
 234                                          ($line =~ /location/) ? @$filters[6]  :
 235                                          ($line =~ /sort1/   ) ? @$filters[9]  :
 236                                          ($line =~ /sort2/   ) ? @$filters[10] : undef ;
 237         if ($line =~ /ccode/ or $line =~ /location/) {
 238                 $linesource = 'items';
 239         }
 240
 241         my @colfilter;
 242         $colfilter[1] = @$filters[1] if ($column =~ /datetime/);
 243         $colfilter[0] = ($column =~ /datetime/) ? @$filters[0]  :
 244                                         ($column =~ /category/) ? @$filters[2]  :
 245                                         ($column =~ /itemtype/) ? @$filters[3]  :
 246                                         ($column =~ /branch/  ) ? @$filters[4]  :
 247                                         ($column =~ /ccode/   ) ? @$filters[5]  :
 248                                         ($column =~ /location/) ? @$filters[6]  :
 249                                         ($column =~ /sort1/   ) ? @$filters[9]  :
 250                                         ($column =~ /sort1/   ) ? @$filters[10] : undef ;
 251         if ($column =~ /ccode/ or $column =~ /location/) {
 252                 $colsource = 'items';
 253         }
 254 # 1st, loop rows.
 255         my $linefield;
 256         if ($line =~ /datetime/) {
 257                 # by Day, Month or Year (1,2,3 respectively)
 258                 $linefield = ($dsp == 1) ? "  dayname($line)" :
 259                                          ($dsp == 2) ? "monthname($line)" :
 260                                          ($dsp == 3) ? "     Year($line)" :
 261                                         'date_format(`datetime`,"%Y-%m-%d")'; # Probably should be left alone or passed through C4::Dates
 262         } else {
 263                 $linefield = $line;
 264         }
 265         my $lineorder = ($linefield =~ /dayname/) ? "weekday($line)" :
 266                                         ($linefield =~ /^month/ ) ? "  month($line)" : $linefield;
 267
 268         my $strsth = "SELECT distinctrow $linefield FROM statistics, ";
 269                 # get stats on items if ccode or location, otherwise borrowers.
 270         $strsth .= ($linesource eq 'items' ) ?
 271                         " items     WHERE (statistics.itemnumber=items.itemnumber) " :
 272                         " borrowers WHERE (statistics.borrowernumber=borrowers.borrowernumber) ";
 273         $strsth .= " AND $line is not null ";
 274
 275         if ($line =~ /datetime/) {
 276                 if ($linefilter[1] and ($linefilter[0])) {
 277                         $strsth .= " AND $line between ? AND ? ";
 278                 } elsif ($linefilter[1]) {
 279                         $strsth .= " AND $line < ? ";
 280                 } elsif ($linefilter[0]) {
 281                 $strsth .= " AND $line > ? ";
 282                 }
 283                 $strsth .= " AND type ='".$type."' " if $type;
 284                 $strsth .= " AND   dayname(datetime) ='".   $daysel ."' " if $daysel;
 285                 $strsth .= " AND monthname(datetime) ='". $monthsel ."' " if $monthsel;
 286         } elsif ($linefilter[0]) {
 287                 $linefilter[0] =~ s/\*/%/g;
 288                 $strsth .= " AND $line LIKE ? ";
 289         }
 290         $strsth .=" group by $linefield order by $lineorder ";
 291         $debug and warn $strsth;
 292         push @loopfilter, {crit=>'SQL =', sql=>1, filter=>$strsth};
 293         my $sth = $dbh->prepare( $strsth );
 294         if ((@linefilter) and ($linefilter[1])){
 295                 $sth->execute($linefilter[0],$linefilter[1]);
 296         } elsif ($linefilter[0]) {
 297                 $sth->execute($linefilter[0]);
 298         } else {
 299                 $sth->execute;
 300         }
 301
 302         while (my ($celvalue) = $sth->fetchrow) {
 303                 my %cell = (rowtitle => $celvalue, totalrow => 0); # we leave 'rowtitle' as hash key (used when filling the table), and add coltitle_display
 304                 $cell{rowtitle_display} =
 305                         ($line =~ /ccode/   ) ? $ccodes->{$celvalue}    :
 306                         ($line =~ /location/) ? $locations->{$celvalue} :
 307                         ($line =~ /itemtype/) ? $itemtypes->{$celvalue}->{description} :
 308                         $celvalue; # default fallback
 309                 if ($line =~ /sort1/) {
 310                         foreach (@$Bsort1) {
 311                                 ($celvalue eq $_->{authorised_value}) or next;
 312                                 $cell{rowtitle_display} = $_->{lib} and last;
 313                         }
 314                 } elsif ($line =~ /sort2/) {
 315                         foreach (@$Bsort2) {
 316                                 ($celvalue eq $_->{authorised_value}) or next;
 317                                 $cell{rowtitle_display} = $_->{lib} and last;
 318                         }
 319                 } elsif ($line =~ /category/) {
 320                         foreach (@$categoryloop) {
 321                                 ($celvalue eq $_->{categorycode}) or next;
 322                                 $cell{rowtitle_display} = $_->{description} and last;
 323                         }
 324                 }
 325                 push @loopline, \%cell;
 326         }
 327
 328 # 2nd, loop cols.
 329         my $colfield;
 330         my $colorder;
 331         if ($column =~ /datetime/) {
 332                 #Display by Day, Month or Year (1,2,3 respectively)
 333                 $colfield = ($dsp == 1) ? "  dayname($column)" :
 334                                         ($dsp == 2) ? "monthname($column)" :
 335                                         ($dsp == 3) ? "     Year($column)" :
 336                                         'date_format(`datetime`,"%Y-%m-%d")'; # Probably should be left alone or passed through C4::Dates
 337         } else {
 338                 $colfield = $column;
 339         }
 340         $colorder = ($colfield =~ /dayname/) ? "weekday($column)" :
 341                                 ($colfield =~ /^month/ ) ? "  month($column)" : $colfield;
 342         my $strsth2 = "SELECT distinctrow $colfield FROM statistics, ";
 343         # get stats on items if ccode or location, otherwise borrowers.
 344         $strsth2 .= ($colsource eq 'items' ) ?
 345                                 "items     WHERE (statistics.itemnumber=items.itemnumber) " :
 346                                 "borrowers WHERE (statistics.borrowernumber=borrowers.borrowernumber) ";
 347         $strsth2 .= " AND $column IS NOT NULL ";
 348
 349         if ($column =~ /datetime/){
 350         if (($colfilter[1]) and ($colfilter[0])){
 351                         $strsth2 .= " AND $column BETWEEN ? AND ? " ;
 352         } elsif ($colfilter[1]) {
 353                         $strsth2 .= " AND $column < ? " ;
 354         } elsif ($colfilter[0]) {
 355                         $strsth2 .= " AND $column > ? " ;
 356         }
 357         $strsth2 .= " AND                type ='". $type     ."' " if $type;
 358         $strsth2 .= " AND   dayname(datetime) ='". $daysel   ."' " if $daysel;
 359         $strsth2 .= " AND monthname(datetime) ='". $monthsel ."' " if $monthsel;
 360     } elsif ($colfilter[0]) {
 361         $colfilter[0] =~ s/\*/%/g;
 362         $strsth2 .= " AND $column LIKE ? " ;
 363     }
 364         $strsth2 .=" GROUP BY $colfield ORDER BY $colorder ";
 365
 366         my $sth2 = $dbh->prepare($strsth2);
 367         push @loopfilter, {crit=>'SQL =', sql=>1, filter=>$strsth2};
 368         if ((@colfilter) and ($colfilter[1])){
 369                 $sth2->execute($colfilter[0], $colfilter[1]);
 370         } elsif ($colfilter[0]) {
 371                 $sth2->execute($colfilter[0]);
 372         } else {
 373                 $sth2->execute;
 374         }
 375
 376         while (my ($celvalue) = $sth2->fetchrow) {
 377                 my %cell = (coltitle => $celvalue); # we leave 'coltitle' as hash key (used when filling the table), and add coltitle_display
 378                 $cell{coltitle_display} =
 379                         ($column =~ /ccode/   ) ?    $ccodes->{$celvalue} :
 380                         ($column =~ /location/) ? $locations->{$celvalue} :
 381                         ($column =~ /itemtype/) ? $itemtypes->{$celvalue}->{description} :
 382                         $celvalue; # default fallback
 383                 if ($column =~ /sort1/) {
 384                         foreach (@$Bsort1) {
 385                                 ($celvalue eq $_->{authorised_value}) or next;
 386                                 $cell{coltitle_display} = $_->{lib} and last;
 387                         }
 388                 } elsif ($column =~ /sort2/) {
 389                         foreach (@$Bsort2) {
 390                                 ($celvalue eq $_->{authorised_value}) or next;
 391                                 $cell{coltitle_display} = $_->{lib} and last;
 392                         }
 393                 } elsif ($column =~ /category/) {
 394                         foreach (@$categoryloop) {
 395                                 ($celvalue eq $_->{categorycode}) or next;
 396                                 $cell{coltitle_display} = $_->{description} and last;
 397                         }
 398                 }
 399                 push @loopcol, \%cell;
 400         }
 401
 402         #Initialization of cell values.....
 403         my %table;
 404         foreach my $row (@loopline) {
 405                 foreach my $col (@loopcol) {
 406                         $debug and warn " init table : $row->{rowtitle} ( $row->{rowtitle_display} ) / $col->{coltitle} ( $col->{coltitle_display} )  ";
 407                         $table{$row->{rowtitle}}->{$col->{coltitle}} = 0;
 408                 }
 409                 $table{$row->{rowtitle}}->{totalrow} = 0;
 410         }
 411
 412 # preparing calculation
 413     my $strcalc = "SELECT $linefield, $colfield, ";
 414         $strcalc .= ($process == 1) ? " COUNT(*) "                                 :
 415                                         ($process == 2) ? "(COUNT(DISTINCT borrowers.borrowernumber))" :
 416                                 ($process == 3) ? "(COUNT(DISTINCT statistics.itemnumber))"        : '';
 417         if ($process == 4) {
 418                 my $rqbookcount = $dbh->prepare("SELECT count(*) FROM items");
 419                 $rqbookcount->execute;
 420                 my ($bookcount) = $rqbookcount->fetchrow;
 421                 $strcalc .= "100*(COUNT(DISTINCT statistics.itemnumber))/ $bookcount " ;
 422         }
 423         $strcalc .= "
 424         FROM statistics
 425         LEFT JOIN borrowers ON statistics.borrowernumber=borrowers.borrowernumber
 426         ";
 427         $strcalc .= "LEFT JOIN items ON statistics.itemnumber=items.itemnumber "
 428         if ($linefield =~ /^items\./ or $colfield =~ /^items\./ or ($colsource eq 'items')
 429             ||@$filters[5]||@$filters[6]||@$filters[7]||@$filters[8]);
 430
 431         $strcalc .= "WHERE 1=1 ";
 432         @$filters = map {defined($_) and s/\*/%/g; $_} @$filters;
 433         $strcalc .= " AND statistics.datetime > '"       . @$filters[0] ."'" if (@$filters[0] );
 434         $strcalc .= " AND statistics.datetime < '"       . @$filters[1] ."'" if (@$filters[1] );
 435         $strcalc .= " AND borrowers.categorycode LIKE '" . @$filters[2] ."'" if (@$filters[2] );
 436         $strcalc .= " AND statistics.itemtype LIKE '"    . @$filters[3] ."'" if (@$filters[3] );
 437         $strcalc .= " AND statistics.branch LIKE '"      . @$filters[4] ."'" if (@$filters[4] );
 438         $strcalc .= " AND items.ccode LIKE '"            . @$filters[5] ."'" if (@$filters[5] );
 439         $strcalc .= " AND items.location LIKE '"         . @$filters[6] ."'" if (@$filters[6] );
 440         $strcalc .= " AND items.itemcallnumber >='"      . @$filters[7] ."'" if (@$filters[7] );
 441         $strcalc .= " AND items.itemcallnumber <'"       . @$filters[8] ."'" if (@$filters[8] );
 442         $strcalc .= " AND borrowers.sort1 LIKE '"        . @$filters[9] ."'" if (@$filters[9] );
 443         $strcalc .= " AND borrowers.sort2 LIKE '"        . @$filters[10]."'" if (@$filters[10]);
 444         $strcalc .= " AND dayname(datetime) LIKE '"      . $daysel      ."'" if ($daysel  );
 445         $strcalc .= " AND monthname(datetime) LIKE '"    . $monthsel    ."'" if ($monthsel);
 446         $strcalc .= " AND statistics.type LIKE '"        . $type        ."'" if ($type    );
 447
 448         $strcalc .= " GROUP BY $linefield, $colfield order by $lineorder,$colorder";
 449         ($debug) and warn $strcalc;
 450         my $dbcalc = $dbh->prepare($strcalc);
 451         push @loopfilter, {crit=>'SQL =', sql=>1, filter=>$strcalc};
 452         $dbcalc->execute;
 453         my ($emptycol,$emptyrow);
 454         while (my ($row, $col, $value) = $dbcalc->fetchrow) {
 455                 ($debug) and warn "filling table $row / $col / $value ";
 456                 unless (defined $col) {
 457                         $emptycol = 1;
 458                         $col = "zzEMPTY" ;
 459                 }
 460                 unless (defined $row) {
 461                         $emptyrow = 1;
 462                         $row = "zzEMPTY";
 463                 }
 464                 $table{$row}->{$col}     += $value;
 465                 $table{$row}->{totalrow} += $value;
 466                 $grantotal += $value;
 467         }
 468         push @loopcol, {coltitle => "NULL", coltitle_display => 'NULL'} if ($emptycol);
 469         push @loopline,{rowtitle => "NULL", rowtitle_display => 'NULL'} if ($emptyrow);
 470
 471         foreach my $row (@loopline) {
 472                 my @loopcell;
 473                 #@loopcol ensures the order for columns is common with column titles
 474                 # and the number matches the number of columns
 475                 foreach my $col (@loopcol) {
 476                         my $value = $table{null_to_zzempty($row->{rowtitle})}->{null_to_zzempty($col->{coltitle})};
 477                         push @loopcell, {value => $value};
 478                 }
 479                 my $rowtitle = ($row->{rowtitle} eq "NULL") ? "zzEMPTY" : $row->{rowtitle};
 480                 push @looprow, {
 481                         'rowtitle_display' => $row->{rowtitle_display},
 482                         'rowtitle' => $rowtitle,
 483                         'loopcell' => \@loopcell,
 484                         'totalrow' => $table{$rowtitle}->{totalrow}
 485                 };
 486         }
 487         for my $col ( @loopcol ) {
 488                 my $total = 0;
 489                 foreach my $row (@looprow) {
 490                         $total += $table{null_to_zzempty($row->{rowtitle})}->{null_to_zzempty($col->{coltitle})};
 491                         $debug and warn "value added ".$table{$row->{rowtitle}}->{$col->{coltitle}}. "for line ".$row->{rowtitle};
 492                 }
 493                 push @loopfooter, {'totalcol' => $total};
 494         }
 495
 496         # the header of the table
 497         $globalline{loopfilter}=\@loopfilter;
 498         # the core of the table
 499         $globalline{looprow} = \@looprow;
 500         $globalline{loopcol} = \@loopcol;
 501         #       # the foot (totals by borrower type)
 502         $globalline{loopfooter} = \@loopfooter;
 503         $globalline{total}  = $grantotal;
 504         $globalline{line}   = $line;
 505         $globalline{column} = $column;
 506         return [(\%globalline)];
 507 }
 508
 509 sub null_to_zzempty ($) {
 510         my $string = shift;
 511         defined($string)    or  return 'zzEMPTY';
 512         ($string eq "NULL") and return 'zzEMPTY';
 513         return $string;         # else return the valid value
 514 }
 515
 516 1;