my $dbh=DBI->connect("dbi:SQLite:dbname=$db_file","","",{ RaiseError =
+> 1 }) or die("$!");
...
my %table;
Show_Tables_and_Identify_Linkages(\%table); # %table gets populated
...
#----------------------------------------------
sub Fetch_w_callback{
   my ($sql, $callback,$state) = @_;
   $debug{SQL} = $sql;
   (my $sth=$dbh->prepare($sql))->execute();
   $state->{FIELDNAMES} = $sth->{NAME};
   $state->{ROW} = 0;
   while (my $row = $sth->fetchrow_hashref()){
      $debug{ROW} = $state->{ROW}++;
      last if $callback->($row,$state) < 0; # Return negative to quit
   }
   $sth->finish;
}

#------------------------------------------------------
#------------------------------------------------------
sub Show_Tables_and_Identify_Linkages{
    my ($tableRef) = @_; #Tableref gets populated here
    #--- Show View and Table names/links -------
    my %Do_not_render = map {$_ => 1} qw|XP_PROC sqlite_sequence|;

    print start_table({-border=>undef, -width=>'75%', -align=>'CENTER'
+,-cellspacing=>0,
                    -cellpadding=>2, -bgcolor=>'SKYBLUE', id=>'ViewsAn
+dTables'}), "\n",
                    start_Tr;
    # -- Use DBI "table_info" to get Table/view, then dig and get Colu
+mn names --
    # Store obtained info into $tableref, and display table/view names
+ in html 
    my $count;
    my %stylemap = (table=>'SampleBlock ShowTable', view=>'SampleBlock
+ ShowView');
    my   $sth = $dbh->table_info(undef,undef,'%',"'TABLE','VIEW'" );#(
+$catalog, $schema, $table, $type ));
    while  (my $t = $sth->fetchrow_hashref() ){
        next if $Do_not_render{ $t->{TABLE_NAME} };
        $count++ % 4 == 0 and print end_Tr,"\n",start_Tr;
        param("NamedQuery", escape($t->{TABLE_NAME}));
        print  td( {-class=>$stylemap{ lc($t->{TABLE_TYPE}) } },
             a({-href=>url(-relative=>1,-query=>1), -class=>'ShowView'
+, -title=> $t->{TABLE_TYPE} . ' query'},
               $t->{TABLE_NAME}));
        my @primary_keys = $dbh->primary_key( @{$t}{qw|TABLE_CAT TABLE
+_SCHEM TABLE_NAME|});# $catalog, $schema, $table );
        s/"//g for @primary_keys; # Zap quotes
        $tableRef->{ $t->{TABLE_NAME}}{_TYPE}   = $t->{TABLE_TYPE};
        $tableRef->{ $t->{TABLE_NAME}}{_TABLELC}= lc $t->{TABLE_NAME};
        $tableRef->{ $t->{TABLE_NAME}}{_SQL}    = $t->{sqlite_sql};
        my $colcount=0;
       my $colinfo = $dbh->column_info(@{$t}{qw|TABLE_CAT TABLE_SCHEM 
+TABLE_NAME|},'%' );#$catalog, $schema, $table, $column );
       while  ($colinfo and my $c = $colinfo->fetchrow_hashref() ){
            push @{ $tableRef->{$t->{TABLE_NAME}}{FIELDS}    },$c->{CO
+LUMN_NAME};
            push @{ $tableRef->{$t->{TABLE_NAME}}{FIELDSLC}  }, lc($c-
+>{COLUMN_NAME});
            $tableRef->{$t->{TABLE_NAME}}{ $c->{COLUMN_NAME} }{TYPE}= 
+$c->{TYPE_NAME};# INTEGER TEXT etc
            $tableRef->{$t->{TABLE_NAME}}{ $c->{COLUMN_NAME} }{PK}  = 
+grep {m/$c->{COLUMN_NAME}/} @primary_keys;  # Primary Key
       }
       next if $colinfo;
       # Did not get col info - try Pragma ..
       Fetch_w_callback("pragma table_info($t->{TABLE_NAME})",
           sub{ my ($row)=@_;
                push @{ $tableRef->{$t->{TABLE_NAME}}{FIELDS} }, $row-
+>{name}; # Fld name  
                push @{ $tableRef->{$t->{TABLE_NAME}}{FIELDSLC}  }, lc
+($row->{name});
                $tableRef->{$t->{TABLE_NAME}}{ $row->{name} }{TYPE}  =
+ $row->{type};
                $tableRef->{$t->{TABLE_NAME}}{ $row->{name} }{PK}    =
+ $row->{pk}; 
           });
  }
   $sth->finish;
    print "\n",end_Tr, end_table,"\n";
    CGI::delete(qw|q NamedQuery|); # From parameter list - keep this c
+lean

    # Identify Table Linkages (Must be post-processed after ALL table/
+field names are obtained) -----
    # A Field named "xxxid' is assumed to be an FKEY to table xxx
    for my $t (keys %$tableRef){
      for my $f (@{ $tableRef->{$t} {FIELDS} } ){
        next if $tableRef->{$t}{$f}{PK}; # Cannot link Primary keys
        #next unless my ($otherTable) = grep {$_ ne $t && $tableRef->{
+$_}{_TABLELC} . "id" eq lc($f) } keys %table;
        #Find linked table, if any, for this field 
        my $otherTable;

        for my $CandidateTable (keys %table){
           next if $t eq $CandidateTable; # dont link to self
           my $lc_candidateT       = $tableRef->{$CandidateTable}{_TAB
+LELC};
           my $singular_CandidateT = substr($lc_candidateT,-1,1) eq "s
+" 
                   ? substr($lc_candidateT,0,-1) : $lc_candidateT;    
           $otherTable = $CandidateTable , last if $lc_candidateT . "i
+d" eq lc ($f);                   
           $otherTable = $CandidateTable , last if $singular_Candidate
+T . "id" eq lc ($f);                          
        }
        next unless $otherTable;
        $tableRef->{$t}{$f}{LINKEDTABLE} = $otherTable;
        for my $fk( @{$tableRef->{$otherTable}{FIELDS}} ){
            next unless $tableRef->{$otherTable}{$fk}{PK}
                     or lc( $fk ) eq "id";
            $tableRef->{$t}{$f}{LINKEDFIELD} = $fk;
            push @{ $tableRef->{$otherTable}{LINKEDTABLES} }, [$t,$f, 
+$fk ];
            last;
        }
      }
    }
    
    # Identify/Invent "View" Linkages -------
    for my $t (keys %$tableRef){
        next unless $tableRef->{ $t }{_TYPE} =~/^view$/i;
        #Need to invent "Fields" -- INCOMPLETE - *TODO* do something h
+ere..
        my $sql = $tableRef->{ $t }{_SQL} or next;
        my %renamed_fields =map {lc} reverse ($sql=~/,\s*(.+?)\s+as\s+
+(\w+)/go);
        next unless %renamed_fields;
        for my $f (@{ $tableRef->{$t} {FIELDSLC} } ){
           next unless my $origfldinfo = $renamed_fields{$f};
           next unless my ($origtable,$orgfld) = $origfldinfo=~/(\w+)\
+.(\w+)/;
           
        
        }
    }
    CGI::delete(qw|q NamedQuery|); # From parameter list
    return ;
}
#------------------------------------------------------
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