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revision 1.77, Mon Nov 20 05:53:02 2006 UTC revision 1.89, Thu Apr 12 05:59:41 2007 UTC
# Line 6  Line 6 
6      use Data::Dumper;      use Data::Dumper;
7      use XML::Simple;      use XML::Simple;
8      use DBQuery;      use DBQuery;
9      use DBObject;      use ERDBObject;
10      use Stats;      use Stats;
11      use Time::HiRes qw(gettimeofday);      use Time::HiRes qw(gettimeofday);
12      use Digest::MD5 qw(md5_base64);      use Digest::MD5 qw(md5_base64);
# Line 228  Line 228 
228    
229  =head3 Indexes  =head3 Indexes
230    
231  An entity can have multiple alternate indexes associated with it. The fields must  An entity can have multiple alternate indexes associated with it. The fields in an
232  all be from the same relation. The alternate indexes assist in ordering results  index must all be from the same relation. The alternate indexes assist in searching
233  from a query. A relationship can have up to two indexes-- a I<to-index> and a  on fields other than the entity ID. A relationship has at least two indexes-- a I<to-index> and a
234  I<from-index>. These order the results when crossing the relationship. For  I<from-index> that order the results when crossing the relationship. For
235  example, in the relationship C<HasContig> from C<Genome> to C<Contig>, the  example, in the relationship C<HasContig> from C<Genome> to C<Contig>, the
236  from-index would order the contigs of a ganome, and the to-index would order  from-index would order the contigs of a ganome, and the to-index would order
237  the genomes of a contig. A relationship's index must specify only fields in  the genomes of a contig. In addition, it can have zero or more alternate
238    indexes. A relationship's index must specify only fields in
239  the relationship.  the relationship.
240    
241  The indexes for an entity must be listed inside the B<Indexes> tag. The from-index  The alternate indexes for an entity or relationship must be listed inside the B<Indexes> tag.
242  of a relationship is specified using the B<FromIndex> tag; the to-index is specified  The from-index of a relationship is specified using the B<FromIndex> tag; the to-index is
243  using the B<ToIndex> tag.  specified using the B<ToIndex> tag.
244    
245  Each index can contain a B<Notes> tag. In addition, it will have an B<IndexFields>  Each index can contain a B<Notes> tag. In addition, it will have an B<IndexFields>
246  tag containing the B<IndexField> tags. These specify, in order, the fields used in  tag containing the B<IndexField> tags. These specify, in order, the fields used in
# Line 257  Line 258 
258    
259  =back  =back
260    
261  The B<Index>, B<FromIndex>, and B<ToIndex> tags themselves have no attributes.  The B<FromIndex>, and B<ToIndex> tags have no attributes. The B<Index> tag can
262    have a B<Unique> attribute. If specified, the index will be generated as a unique
263    index.
264    
265  =head3 Object and Field Names  =head3 Object and Field Names
266    
# Line 301  Line 304 
304    
305  A relationship is described by the C<Relationship> tag. Within a relationship,  A relationship is described by the C<Relationship> tag. Within a relationship,
306  there can be a C<Notes> tag, a C<Fields> tag containing the intersection data  there can be a C<Notes> tag, a C<Fields> tag containing the intersection data
307  fields, a C<FromIndex> tag containing the from-index, and a C<ToIndex> tag containing  fields, a C<FromIndex> tag containing the from-index, a C<ToIndex> tag containing
308  the to-index.  the to-index, and an C<Indexes> tag containing the alternate indexes.
309    
310  The C<Relationship> tag has the following attributes.  The C<Relationship> tag has the following attributes.
311    
# Line 394  Line 397 
397                   );                   );
398    
399  my %XmlInOpts  = (  my %XmlInOpts  = (
400                    ForceArray => ['Field', 'Index', 'IndexField'],                    ForceArray => ['Field', 'Index', 'IndexField', 'Relationship', 'Entity'],
401                    ForceContent => 1,                    ForceContent => 1,
402                    NormalizeSpace => 2,                    NormalizeSpace => 2,
403                   );                   );
# Line 546  Line 549 
549          if (my $notes = $entityData->{Notes}) {          if (my $notes = $entityData->{Notes}) {
550              $retVal .= "<p>" . HTMLNote($notes->{content}) . "</p>\n";              $retVal .= "<p>" . HTMLNote($notes->{content}) . "</p>\n";
551          }          }
552          # Now we want a list of the entity's relationships. First, we set up the relationship subsection.          # See if we need a list of the entity's relationships.
553            my $relCount = keys %{$relationshipList};
554            if ($relCount > 0) {
555                # First, we set up the relationship subsection.
556          $retVal .= "<h4>Relationships for <b>$key</b></h4>\n<ul>\n";          $retVal .= "<h4>Relationships for <b>$key</b></h4>\n<ul>\n";
557          # Loop through the relationships.          # Loop through the relationships.
558          for my $relationship (sort keys %{$relationshipList}) {          for my $relationship (sort keys %{$relationshipList}) {
# Line 562  Line 568 
568          }          }
569          # Close off the relationship list.          # Close off the relationship list.
570          $retVal .= "</ul>\n";          $retVal .= "</ul>\n";
571            }
572          # Get the entity's relations.          # Get the entity's relations.
573          my $relationList = $entityData->{Relations};          my $relationList = $entityData->{Relations};
574          # Create a header for the relation subsection.          # Create a header for the relation subsection.
# Line 648  Line 655 
655      return Data::Dumper::Dumper($self->{_metaData});      return Data::Dumper::Dumper($self->{_metaData});
656  }  }
657    
658    =head3 CreatePPO
659    
660    C<< ERDB::CreatePPO($erdbXMLFile, $ppoXMLFile); >>
661    
662    Create a PPO XML file from an ERDB data definition XML file. At the
663    current time, the PPO XML file can be used to create a database with
664    similar functionality. Eventually, the PPO will be able to use the
665    created XML to access the live ERDB database.
666    
667    =over 4
668    
669    =item erdbXMLFile
670    
671    Name of the XML data definition file for the ERDB database. This
672    file must exist.
673    
674    =item ppoXMLFile
675    
676    Output file for the PPO XML definition. If this file exists, it
677    will be overwritten.
678    
679    =back
680    
681    =cut
682    
683    sub CreatePPO {
684        # Get the parameters.
685        my ($erdbXMLFile, $ppoXMLFile) = @_;
686        # First, we want to slurp in the ERDB XML file in its raw form.
687        my $xml = ReadMetaXML($erdbXMLFile);
688        # Create a variable to hold all of the objects in the PPO project.
689        my @objects = ();
690        # Get the relationship hash.
691        my $relationships = $xml->{Relationships};
692        # Loop through the entities.
693        my $entities = $xml->{Entities};
694        for my $entityName (keys %{$entities}) {
695            # Get the entity's data structures.
696            my $entityObject = $entities->{$entityName};
697            # We put the object's fields in here, according to their type.
698            my (@object_refs, @scalars, @indexes, @arrays);
699            # Create the ID field for the entity. We get the key type from the
700            # entity object and compute the corresponding SQL type.
701            my $type = $TypeTable{$entityObject->{keyType}}->{sqlType};
702            push @scalars, { label => 'id', type => $type };
703            # Loop through the entity fields.
704            for my $fieldName ( keys %{$entityObject->{Fields}} ) {
705                # Get the field object.
706                my $fieldObject = $entityObject->{Fields}->{$fieldName};
707                # Convert it to a scalar tag.
708                my $scalar = _CreatePPOField($fieldName, $fieldObject);
709                # If we have a relation, this field is stored in an array.
710                # otherwise, it is a scalar. The array tag has scalars
711                # stored as an XML array. In ERDB, there is only ever one,
712                # but PPO can have more.
713                my $relation = $fieldObject->{relation};
714                if ($relation) {
715                    push @arrays, { scalar => [$scalar] };
716                } else {
717                    push @scalars, $scalar;
718                }
719            }
720            # Loop through the relationships. If this entity is the to-entity
721            # on a relationship of 1M arity, then it is implemented as a PPO
722            # object reference.
723            for my $relationshipName (keys %{$relationships}) {
724                # Get the relationship data.
725                my $relationshipData = $relationships->{$relationshipName};
726                # If we have a from for this entity and an arity of 1M, we
727                # have an object reference.
728                if ($relationshipData->{to} eq $entityName &&
729                    $relationshipData->{arity} eq '1M') {
730                    # Build the object reference tag.
731                    push @object_refs, { label => $relationshipName,
732                                         type => $relationshipData->{from} };
733                }
734            }
735            # Create the indexes.
736            my $indexList = $entityObject->{Indexes};
737            push @indexes, map { _CreatePPOIndex($_) } @{$indexList};
738            # Build the object XML tree.
739            my $object = { label => $entityName,
740                           object_ref => \@object_refs,
741                           scalar => \@scalars,
742                           index => \@indexes,
743                           array => \@arrays
744                          };
745            # Push the object onto the objects list.
746            push @objects, $object;
747        }
748        # Loop through the relationships, searching for MMs. The 1Ms were
749        # already handled by the entity search above.
750        for my $relationshipName (keys %{$relationships}) {
751            # Get this relationship's object.
752            my $relationshipObject = $relationships->{$relationshipName};
753            # Only proceed if it's many-to-many.
754            if ($relationshipObject->{arity} eq 'MM') {
755                # Create the tag lists for the relationship object.
756                my (@object_refs, @scalars, @indexes);
757                # The relationship will be created as an object with object
758                # references for its links to the participating entities.
759                my %links = ( from => $relationshipObject->{from},
760                              to => $relationshipObject->{to} );
761                for my $link (keys %links) {
762                    # Create an object_ref tag for this piece of the
763                    # relationship (from or to).
764                    my $object_ref = { label => $link,
765                                       type => $links{$link} };
766                    push @object_refs, $object_ref;
767                }
768                # Loop through the intersection data fields, creating scalar tags.
769                # There are no fancy array tags in a relationship.
770                for my $fieldName (keys %{$relationshipObject->{Fields}}) {
771                    my $fieldObject = $relationshipObject->{Fields}->{$fieldName};
772                    push @scalars, _CreatePPOField($fieldName, $fieldObject);
773                }
774                # Finally, the indexes: currently we cannot support the to-index and
775                # from-index in PPO, so we just process the alternate indexes.
776                my $indexList = $relationshipObject->{Indexes};
777                push @indexes, map { _CreatePPOIndex($_) } @{$indexList};
778                # Wrap up all the stuff about this relationship.
779                my $object = { label => $relationshipName,
780                               scalar => \@scalars,
781                               object_ref => \@object_refs,
782                               index => \@indexes
783                             };
784                # Push it into the object list.
785                push @objects, $object;
786            }
787        }
788        # Compute a title.
789        my $title;
790        if ($erdbXMLFile =~ /\/([^\/]+)DBD\.xml/) {
791            # Here we have a standard file name we can use for a title.
792            $title = $1;
793        } else {
794            # Here the file name is non-standard, so we carve up the
795            # database title.
796            $title = $xml->{Title}->{content};
797            $title =~ s/\s\.,//g;
798        }
799        # Wrap up the XML as a project.
800        my $ppoXML = { project => { label => $title,
801                                    object => \@objects }};
802        # Write out the results.
803        my $ppoString = XML::Simple::XMLout($ppoXML,
804                                            AttrIndent => 1,
805                                            KeepRoot => 1);
806        Tracer::PutFile($ppoXMLFile, [ $ppoString ]);
807    }
808    
809    
810    
811  =head3 FindIndexForEntity  =head3 FindIndexForEntity
812    
813  C<< my $indexFound = ERDB::FindIndexForEntity($xml, $entityName, $attributeName); >>  C<< my $indexFound = ERDB::FindIndexForEntity($xml, $entityName, $attributeName); >>
# Line 737  Line 897 
897      # Loop through the relations.      # Loop through the relations.
898      for my $relationName (@relNames) {      for my $relationName (@relNames) {
899          # Create a table for this relation.          # Create a table for this relation.
900          $self->CreateTable($relationName);          $self->CreateTable($relationName, 1);
901          Trace("Relation $relationName created.") if T(2);          Trace("Relation $relationName created.") if T(2);
902      }      }
903  }  }
# Line 966  Line 1126 
1126          my @rawFields = @{$indexData->{IndexFields}};          my @rawFields = @{$indexData->{IndexFields}};
1127          # Get a hash of the relation's field types.          # Get a hash of the relation's field types.
1128          my %types = map { $_->{name} => $_->{type} } @{$relationData->{Fields}};          my %types = map { $_->{name} => $_->{type} } @{$relationData->{Fields}};
1129          # We need to check for text fields. We need a append a length limitation for them. To do          # We need to check for text fields so we can append a length limitation for them. To do
1130          # that, we need the relation's field list.          # that, we need the relation's field list.
1131          my $relFields = $relationData->{Fields};          my $relFields = $relationData->{Fields};
1132          for (my $i = 0; $i <= $#rawFields; $i++) {          for (my $i = 0; $i <= $#rawFields; $i++) {
# Line 1418  Line 1578 
1578      return $retVal;      return $retVal;
1579  }  }
1580    
1581    
1582    
1583  =head3 Search  =head3 Search
1584    
1585  C<< my $query = $erdb->Search($searchExpression, $idx, \@objectNames, $filterClause, \@params); >>  C<< my $query = $erdb->Search($searchExpression, $idx, \@objectNames, $filterClause, \@params); >>
# Line 1489  Line 1651 
1651          my $actualKeywords = $self->CleanKeywords($searchExpression);          my $actualKeywords = $self->CleanKeywords($searchExpression);
1652          # Prefix a "+" to each uncontrolled word. This converts the default          # Prefix a "+" to each uncontrolled word. This converts the default
1653          # search mode from OR to AND.          # search mode from OR to AND.
1654          $actualKeywords =~ s/(^|\s)(\w)/$1\+$2/g;          $actualKeywords =~ s/(^|\s)(\w|")/$1\+$2/g;
1655          Trace("Actual keywords for search are\n$actualKeywords") if T(3);          Trace("Actual keywords for search are\n$actualKeywords") if T(3);
1656          # We need two match expressions, one for the filter clause and one in the          # We need two match expressions, one for the filter clause and one in the
1657          # query itself. Both will use a parameter mark, so we need to push the          # query itself. Both will use a parameter mark, so we need to push the
# Line 1612  Line 1774 
1774    
1775  =head3 Delete  =head3 Delete
1776    
1777  C<< my $stats = $erdb->Delete($entityName, $objectID, $testFlag); >>  C<< my $stats = $erdb->Delete($entityName, $objectID, %options); >>
1778    
1779  Delete an entity instance from the database. The instance is deleted along with all entity and  Delete an entity instance from the database. The instance is deleted along with all entity and
1780  relationship instances dependent on it. The definition of I<dependence> is recursive.  relationship instances dependent on it. The definition of I<dependence> is recursive.
# Line 1632  Line 1794 
1794  ID of the entity instance to be deleted. If the ID contains a wild card character (C<%>),  ID of the entity instance to be deleted. If the ID contains a wild card character (C<%>),
1795  then it is presumed to by a LIKE pattern.  then it is presumed to by a LIKE pattern.
1796    
1797  =item testFlag  =item options
1798    
1799  If TRUE, the delete statements will be traced without being executed.  A hash detailing the options for this delete operation.
1800    
1801  =item RETURN  =item RETURN
1802    
# Line 1643  Line 1805 
1805    
1806  =back  =back
1807    
1808    The permissible options for this method are as follows.
1809    
1810    =over 4
1811    
1812    =item testMode
1813    
1814    If TRUE, then the delete statements will be traced, but no changes will be made to the database.
1815    
1816    =item keepRoot
1817    
1818    If TRUE, then the entity instances will not be deleted, only the dependent records.
1819    
1820    =back
1821    
1822  =cut  =cut
1823  #: Return Type $%;  #: Return Type $%;
1824  sub Delete {  sub Delete {
1825      # Get the parameters.      # Get the parameters.
1826      my ($self, $entityName, $objectID, $testFlag) = @_;      my ($self, $entityName, $objectID, %options) = @_;
1827      # Declare the return variable.      # Declare the return variable.
1828      my $retVal = Stats->new();      my $retVal = Stats->new();
1829      # Get the DBKernel object.      # Get the DBKernel object.
# Line 1664  Line 1840 
1840      # FROM-relationships and entities.      # FROM-relationships and entities.
1841      my @fromPathList = ();      my @fromPathList = ();
1842      my @toPathList = ();      my @toPathList = ();
1843      # This final hash is used to remember what work still needs to be done. We push paths      # This final list is used to remember what work still needs to be done. We push paths
1844      # onto the list, then pop them off to extend the paths. We prime it with the starting      # onto the list, then pop them off to extend the paths. We prime it with the starting
1845      # point. Note that we will work hard to insure that the last item on a path in the      # point. Note that we will work hard to insure that the last item on a path in the
1846      # to-do list is always an entity.      # to-do list is always an entity.
# Line 1675  Line 1851 
1851          # Copy it into a list.          # Copy it into a list.
1852          my @stackedPath = @{$current};          my @stackedPath = @{$current};
1853          # Pull off the last item on the path. It will always be an entity.          # Pull off the last item on the path. It will always be an entity.
1854          my $entityName = pop @stackedPath;          my $myEntityName = pop @stackedPath;
1855          # Add it to the alreadyFound list.          # Add it to the alreadyFound list.
1856          $alreadyFound{$entityName} = 1;          $alreadyFound{$myEntityName} = 1;
1857            # Figure out if we need to delete this entity.
1858            if ($myEntityName ne $entityName || ! $options{keepRoot}) {
1859          # Get the entity data.          # Get the entity data.
1860          my $entityData = $self->_GetStructure($entityName);              my $entityData = $self->_GetStructure($myEntityName);
1861          # The first task is to loop through the entity's relation. A DELETE command will              # Loop through the entity's relations. A DELETE command will be needed for each of them.
         # be needed for each of them.  
1862          my $relations = $entityData->{Relations};          my $relations = $entityData->{Relations};
1863          for my $relation (keys %{$relations}) {          for my $relation (keys %{$relations}) {
1864              my @augmentedList = (@stackedPath, $relation);              my @augmentedList = (@stackedPath, $relation);
1865              push @fromPathList, \@augmentedList;              push @fromPathList, \@augmentedList;
1866          }          }
1867            }
1868          # Now we need to look for relationships connected to this entity.          # Now we need to look for relationships connected to this entity.
1869          my $relationshipList = $self->{_metaData}->{Relationships};          my $relationshipList = $self->{_metaData}->{Relationships};
1870          for my $relationshipName (keys %{$relationshipList}) {          for my $relationshipName (keys %{$relationshipList}) {
1871              my $relationship = $relationshipList->{$relationshipName};              my $relationship = $relationshipList->{$relationshipName};
1872              # Check the FROM field. We're only interested if it's us.              # Check the FROM field. We're only interested if it's us.
1873              if ($relationship->{from} eq $entityName) {              if ($relationship->{from} eq $myEntityName) {
1874                  # Add the path to this relationship.                  # Add the path to this relationship.
1875                  my @augmentedList = (@stackedPath, $entityName, $relationshipName);                  my @augmentedList = (@stackedPath, $myEntityName, $relationshipName);
1876                  push @fromPathList, \@augmentedList;                  push @fromPathList, \@augmentedList;
1877                  # Check the arity. If it's MM we're done. If it's 1M                  # Check the arity. If it's MM we're done. If it's 1M
1878                  # and the target hasn't been seen yet, we want to                  # and the target hasn't been seen yet, we want to
# Line 1713  Line 1891 
1891              }              }
1892              # Now check the TO field. In this case only the relationship needs              # Now check the TO field. In this case only the relationship needs
1893              # deletion.              # deletion.
1894              if ($relationship->{to} eq $entityName) {              if ($relationship->{to} eq $myEntityName) {
1895                  my @augmentedList = (@stackedPath, $entityName, $relationshipName);                  my @augmentedList = (@stackedPath, $myEntityName, $relationshipName);
1896                  push @toPathList, \@augmentedList;                  push @toPathList, \@augmentedList;
1897              }              }
1898          }          }
1899      }      }
1900      # Create the first qualifier for the WHERE clause. This selects the      # Create the first qualifier for the WHERE clause. This selects the
1901      # keys of the primary entity records to be deleted. When we're deleting      # keys of the primary entity records to be deleted. When we're deleting
1902      # from a dependent table, we construct a join page from the first qualifier      # from a dependent table, we construct a join path from the first qualifier
1903      # to the table containing the dependent records to delete.      # to the table containing the dependent records to delete.
1904      my $qualifier = ($objectID =~ /%/ ? "LIKE ?" : "= ?");      my $qualifier = ($objectID =~ /%/ ? "LIKE ?" : "= ?");
1905      # We need to make two passes. The first is through the to-list, and      # We need to make two passes. The first is through the to-list, and
# Line 1760  Line 1938 
1938                  }                  }
1939              }              }
1940              # Now we have our desired DELETE statement.              # Now we have our desired DELETE statement.
1941              if ($testFlag) {              if ($options{testMode}) {
1942                  # Here the user wants to trace without executing.                  # Here the user wants to trace without executing.
1943                  Trace($stmt) if T(0);                  Trace($stmt) if T(0);
1944              } else {              } else {
# Line 1779  Line 1957 
1957      return $retVal;      return $retVal;
1958  }  }
1959    
1960    =head3 Disconnect
1961    
1962    C<< $erdb->Disconnect($relationshipName, $originEntityName, $originEntityID); >>
1963    
1964    Disconnect an entity instance from all the objects to which it is related. This
1965    will delete each relationship instance that connects to the specified entity.
1966    
1967    =over 4
1968    
1969    =item relationshipName
1970    
1971    Name of the relationship whose instances are to be deleted.
1972    
1973    =item originEntityName
1974    
1975    Name of the entity that is to be disconnected.
1976    
1977    =item originEntityID
1978    
1979    ID of the entity that is to be disconnected.
1980    
1981    =back
1982    
1983    =cut
1984    
1985    sub Disconnect {
1986        # Get the parameters.
1987        my ($self, $relationshipName, $originEntityName, $originEntityID) = @_;
1988        # Get the relationship descriptor.
1989        my $structure = $self->_GetStructure($relationshipName);
1990        # Insure we have a relationship.
1991        if (! exists $structure->{from}) {
1992            Confess("$relationshipName is not a relationship in the database.");
1993        } else {
1994            # Get the database handle.
1995            my $dbh = $self->{_dbh};
1996            # We'll set this value to 1 if we find our entity.
1997            my $found = 0;
1998            # Loop through the ends of the relationship.
1999            for my $dir ('from', 'to') {
2000                if ($structure->{$dir} eq $originEntityName) {
2001                    # Delete all relationship instances on this side of the entity instance.
2002                    Trace("Disconnecting in $dir direction with ID \"$originEntityID\".");
2003                    $dbh->SQL("DELETE FROM $relationshipName WHERE ${dir}_link = ?", 0, $originEntityID);
2004                    $found = 1;
2005                }
2006            }
2007            # Insure we found the entity on at least one end.
2008            if (! $found) {
2009                Confess("Entity \"$originEntityName\" does not use $relationshipName.");
2010            }
2011        }
2012    }
2013    
2014    =head3 DeleteRow
2015    
2016    C<< $erdb->DeleteRow($relationshipName, $fromLink, $toLink, \%values); >>
2017    
2018    Delete a row from a relationship. In most cases, only the from-link and to-link are
2019    needed; however, for relationships with intersection data values can be specified
2020    for the other fields using a hash.
2021    
2022    =over 4
2023    
2024    =item relationshipName
2025    
2026    Name of the relationship from which the row is to be deleted.
2027    
2028    =item fromLink
2029    
2030    ID of the entity instance in the From direction.
2031    
2032    =item toLink
2033    
2034    ID of the entity instance in the To direction.
2035    
2036    =item values
2037    
2038    Reference to a hash of other values to be used for filtering the delete.
2039    
2040    =back
2041    
2042    =cut
2043    
2044    sub DeleteRow {
2045        # Get the parameters.
2046        my ($self, $relationshipName, $fromLink, $toLink, $values) = @_;
2047        # Create a hash of all the filter information.
2048        my %filter = ('from-link' => $fromLink, 'to-link' => $toLink);
2049        if (defined $values) {
2050            for my $key (keys %{$values}) {
2051                $filter{$key} = $values->{$key};
2052            }
2053        }
2054        # Build an SQL statement out of the hash.
2055        my @filters = ();
2056        my @parms = ();
2057        for my $key (keys %filter) {
2058            push @filters, _FixName($key) . " = ?";
2059            push @parms, $filter{$key};
2060        }
2061        Trace("Parms for delete row are " . join(", ", map { "\"$_\"" } @parms) . ".") if T(SQL => 4);
2062        my $command = "DELETE FROM $relationshipName WHERE " .
2063                      join(" AND ", @filters);
2064        # Execute it.
2065        my $dbh = $self->{_dbh};
2066        $dbh->SQL($command, undef, @parms);
2067    }
2068    
2069  =head3 SortNeeded  =head3 SortNeeded
2070    
2071  C<< my $parms = $erdb->SortNeeded($relationName); >>  C<< my $parms = $erdb->SortNeeded($relationName); >>
# Line 1919  Line 2206 
2206    
2207  =item RETURN  =item RETURN
2208    
2209  Returns a list of B<DBObject>s that satisfy the query conditions.  Returns a list of B<ERDBObject>s that satisfy the query conditions.
2210    
2211  =back  =back
2212    
# Line 2175  Line 2462 
2462    
2463  =head3 InsertObject  =head3 InsertObject
2464    
2465  C<< my $ok = $erdb->InsertObject($objectType, \%fieldHash); >>  C<< $erdb->InsertObject($objectType, \%fieldHash); >>
2466    
2467  Insert an object into the database. The object is defined by a type name and then a hash  Insert an object into the database. The object is defined by a type name and then a hash
2468  of field names to values. Field values in the primary relation are represented by scalars.  of field names to values. Field values in the primary relation are represented by scalars.
# Line 2201  Line 2488 
2488    
2489  Hash of field names to values.  Hash of field names to values.
2490    
 =item RETURN  
   
 Returns 1 if successful, 0 if an error occurred.  
   
2491  =back  =back
2492    
2493  =cut  =cut
# Line 2303  Line 2586 
2586                  $retVal = $sth->execute(@parameterList);                  $retVal = $sth->execute(@parameterList);
2587                  if (!$retVal) {                  if (!$retVal) {
2588                      my $errorString = $sth->errstr();                      my $errorString = $sth->errstr();
2589                      Trace("Insert error: $errorString.") if T(0);                      Confess("Error inserting into $relationName: $errorString");
2590                    } else {
2591                        Trace("Insert successful using $parameterList[0].") if T(3);
2592                  }                  }
2593              }              }
2594          }          }
2595      }      }
2596      # Return the success indicator.      # Return a 1 for backward compatability.
2597      return $retVal;      return 1;
2598    }
2599    
2600    =head3 UpdateEntity
2601    
2602    C<< $erdb->UpdateEntity($entityName, $id, \%fields); >>
2603    
2604    Update the values of an entity. This is an unprotected update, so it should only be
2605    done if the database resides on a database server.
2606    
2607    =over 4
2608    
2609    =item entityName
2610    
2611    Name of the entity to update. (This is the entity type.)
2612    
2613    =item id
2614    
2615    ID of the entity to update. If no entity exists with this ID, an error will be thrown.
2616    
2617    =item fields
2618    
2619    Reference to a hash mapping field names to their new values. All of the fields named
2620    must be in the entity's primary relation, and they cannot any of them be the ID field.
2621    
2622    =back
2623    
2624    =cut
2625    
2626    sub UpdateEntity {
2627        # Get the parameters.
2628        my ($self, $entityName, $id, $fields) = @_;
2629        # Get a list of the field names being updated.
2630        my @fieldList = keys %{$fields};
2631        # Verify that the fields exist.
2632        my $checker = $self->GetFieldTable($entityName);
2633        for my $field (@fieldList) {
2634            if ($field eq 'id') {
2635                Confess("Cannot update the ID field for entity $entityName.");
2636            } elsif ($checker->{$field}->{relation} ne $entityName) {
2637                Confess("Cannot find $field in primary relation of $entityName.");
2638            }
2639        }
2640        # Build the SQL statement.
2641        my @sets = ();
2642        my @valueList = ();
2643        for my $field (@fieldList) {
2644            push @sets, _FixName($field) . " = ?";
2645            push @valueList, $fields->{$field};
2646        }
2647        my $command = "UPDATE $entityName SET " . join(", ", @sets) . " WHERE id = ?";
2648        # Add the ID to the list of binding values.
2649        push @valueList, $id;
2650        # Call SQL to do the work.
2651        my $rows = $self->{_dbh}->SQL($command, 0, @valueList);
2652        # Check for errors.
2653        if ($rows == 0) {
2654            Confess("Entity $id of type $entityName not found.");
2655        }
2656  }  }
2657    
2658  =head3 LoadTable  =head3 LoadTable
2659    
2660  C<< my %results = $erdb->LoadTable($fileName, $relationName, $truncateFlag); >>  C<< my $results = $erdb->LoadTable($fileName, $relationName, $truncateFlag); >>
2661    
2662  Load data from a tab-delimited file into a specified table, optionally re-creating the table  Load data from a tab-delimited file into a specified table, optionally re-creating the table
2663  first.  first.
# Line 2403  Line 2746 
2746              # The full-text index (if any) is always built last, even for MySQL.              # The full-text index (if any) is always built last, even for MySQL.
2747              # First we need to see if this table has a full-text index. Only              # First we need to see if this table has a full-text index. Only
2748              # primary relations are allowed that privilege.              # primary relations are allowed that privilege.
2749                Trace("Checking for full-text index on $relationName.") if T(2);
2750              if ($self->_IsPrimary($relationName)) {              if ($self->_IsPrimary($relationName)) {
2751                  # Get the relation's entity/relationship structure.                  $self->CreateSearchIndex($relationName);
                 my $structure = $self->_GetStructure($relationName);  
                 # Check for a searchable fields list.  
                 if (exists $structure->{searchFields}) {  
                     # Here we know that we need to create a full-text search index.  
                     # Get an SQL-formatted field name list.  
                     my $fields = join(", ", $self->_FixNames(@{$structure->{searchFields}}));  
                     # Create the index.  
                     $dbh->create_index(tbl => $relationName, idx => "search_idx",  
                                        flds => $fields, kind => 'fulltext');  
                 }  
2752              }              }
2753          }          }
2754      }      }
# Line 2426  Line 2760 
2760      return $retVal;      return $retVal;
2761  }  }
2762    
2763    =head3 CreateSearchIndex
2764    
2765    C<< $erdb->CreateSearchIndex($objectName); >>
2766    
2767    Check for a full-text search index on the specified entity or relationship object, and
2768    if one is required, rebuild it.
2769    
2770    =over 4
2771    
2772    =item objectName
2773    
2774    Name of the entity or relationship to be indexed.
2775    
2776    =back
2777    
2778    =cut
2779    
2780    sub CreateSearchIndex {
2781        # Get the parameters.
2782        my ($self, $objectName) = @_;
2783        # Get the relation's entity/relationship structure.
2784        my $structure = $self->_GetStructure($objectName);
2785        # Get the database handle.
2786        my $dbh = $self->{_dbh};
2787        Trace("Checking for search fields in $objectName.") if T(3);
2788        # Check for a searchable fields list.
2789        if (exists $structure->{searchFields}) {
2790            # Here we know that we need to create a full-text search index.
2791            # Get an SQL-formatted field name list.
2792            my $fields = join(", ", _FixNames(@{$structure->{searchFields}}));
2793            # Create the index. If it already exists, it will be dropped.
2794            $dbh->create_index(tbl => $objectName, idx => "search_idx",
2795                               flds => $fields, kind => 'fulltext');
2796            Trace("Index created for $fields in $objectName.") if T(2);
2797        }
2798    }
2799    
2800  =head3 DropRelation  =head3 DropRelation
2801    
2802  C<< $erdb->DropRelation($relationName); >>  C<< $erdb->DropRelation($relationName); >>
# Line 2454  Line 2825 
2825      $dbh->drop_table(tbl => $relationName);      $dbh->drop_table(tbl => $relationName);
2826  }  }
2827    
2828    =head3 MatchSqlPattern
2829    
2830    C<< my $matched = ERDB::MatchSqlPattern($value, $pattern); >>
2831    
2832    Determine whether or not a specified value matches an SQL pattern. An SQL
2833    pattern has two wild card characters: C<%> that matches multiple characters,
2834    and C<_> that matches a single character. These can be escaped using a
2835    backslash (C<\>). We pull this off by converting the SQL pattern to a
2836    PERL regular expression. As per SQL rules, the match is case-insensitive.
2837    
2838    =over 4
2839    
2840    =item value
2841    
2842    Value to be matched against the pattern. Note that an undefined or empty
2843    value will not match anything.
2844    
2845    =item pattern
2846    
2847    SQL pattern against which to match the value. An undefined or empty pattern will
2848    match everything.
2849    
2850    =item RETURN
2851    
2852    Returns TRUE if the value and pattern match, else FALSE.
2853    
2854    =back
2855    
2856    =cut
2857    
2858    sub MatchSqlPattern {
2859        # Get the parameters.
2860        my ($value, $pattern) = @_;
2861        # Declare the return variable.
2862        my $retVal;
2863        # Insure we have a pattern.
2864        if (! defined($pattern) || $pattern eq "") {
2865            $retVal = 1;
2866        } else {
2867            # Break the pattern into pieces around the wildcard characters. Because we
2868            # use parentheses in the split function's delimiter expression, we'll get
2869            # list elements for the delimiters as well as the rest of the string.
2870            my @pieces = split /([_%]|\\[_%])/, $pattern;
2871            # Check some fast special cases.
2872            if ($pattern eq '%') {
2873                # A null pattern matches everything.
2874                $retVal = 1;
2875            } elsif (@pieces == 1) {
2876                # No wildcards, so we have a literal comparison. Note we're case-insensitive.
2877                $retVal = (lc($value) eq lc($pattern));
2878            } elsif (@pieces == 2 && $pieces[1] eq '%') {
2879                # A wildcard at the end, so we have a substring match. This is also case-insensitive.
2880                $retVal = (lc(substr($value, 0, length($pieces[0]))) eq lc($pieces[0]));
2881            } else {
2882                # Okay, we have to do it the hard way. Convert each piece to a PERL pattern.
2883                my $realPattern = "";
2884                for my $piece (@pieces) {
2885                    # Determine the type of piece.
2886                    if ($piece eq "") {
2887                        # Empty pieces are ignored.
2888                    } elsif ($piece eq "%") {
2889                        # Here we have a multi-character wildcard. Note that it can match
2890                        # zero or more characters.
2891                        $realPattern .= ".*"
2892                    } elsif ($piece eq "_") {
2893                        # Here we have a single-character wildcard.
2894                        $realPattern .= ".";
2895                    } elsif ($piece eq "\\%" || $piece eq "\\_") {
2896                        # This is an escape sequence (which is a rare thing, actually).
2897                        $realPattern .= substr($piece, 1, 1);
2898                    } else {
2899                        # Here we have raw text.
2900                        $realPattern .= quotemeta($piece);
2901                    }
2902                }
2903                # Do the match.
2904                $retVal = ($value =~ /^$realPattern$/i ? 1 : 0);
2905            }
2906        }
2907        # Return the result.
2908        return $retVal;
2909    }
2910    
2911  =head3 GetEntity  =head3 GetEntity
2912    
2913  C<< my $entityObject = $erdb->GetEntity($entityType, $ID); >>  C<< my $entityObject = $erdb->GetEntity($entityType, $ID); >>
# Line 2472  Line 2926 
2926    
2927  =item RETURN  =item RETURN
2928    
2929  Returns a B<DBObject> representing the desired entity instance, or an undefined value if no  Returns a B<ERDBObject> representing the desired entity instance, or an undefined value if no
2930  instance is found with the specified key.  instance is found with the specified key.
2931    
2932  =back  =back
# Line 2607  Line 3061 
3061  spreadsheet cell, and each feature will be represented by a list containing the  spreadsheet cell, and each feature will be represented by a list containing the
3062  feature ID followed by all of its aliases.  feature ID followed by all of its aliases.
3063    
3064  C<< $query = $erdb->Get(['ContainsFeature', 'Feature'], "ContainsFeature(from-link) = ?", [$ssCellID], ['Feature(id)', 'Feature(alias)']); >>  C<< @query = $erdb->Get(['ContainsFeature', 'Feature'], "ContainsFeature(from-link) = ?", [$ssCellID], ['Feature(id)', 'Feature(alias)']); >>
3065    
3066  =over 4  =over 4
3067    
# Line 2861  Line 3315 
3315      # Declare the return variable. The field name is valid until we hear      # Declare the return variable. The field name is valid until we hear
3316      # differently.      # differently.
3317      my $retVal = 1;      my $retVal = 1;
3318        # Compute the maximum name length.
3319        my $maxLen = $TypeTable{'name-string'}->{maxLen};
3320      # Look for bad stuff in the name.      # Look for bad stuff in the name.
3321      if ($fieldName =~ /--/) {      if ($fieldName =~ /--/) {
3322          # Here we have a doubled minus sign.          # Here we have a doubled minus sign.
# Line 2870  Line 3326 
3326          # Here the field name is missing the initial letter.          # Here the field name is missing the initial letter.
3327          Trace("Field name $fieldName does not begin with a letter.") if T(1);          Trace("Field name $fieldName does not begin with a letter.") if T(1);
3328          $retVal = 0;          $retVal = 0;
3329        } elsif (length($fieldName) > $maxLen) {
3330            # Here the field name is too long.
3331            Trace("Maximum field name length is $maxLen. Field name must be truncated to " . substr($fieldName,0, $maxLen) . ".");
3332      } else {      } else {
3333          # Strip out the minus signs. Everything remaining must be a letter,          # Strip out the minus signs. Everything remaining must be a letter,
3334          # underscore, or digit.          # underscore, or digit.
# Line 3024  Line 3483 
3483      # Substitute the bulletin board codes.      # Substitute the bulletin board codes.
3484      $retVal =~ s!\[(/?[bi])\]!<$1>!g;      $retVal =~ s!\[(/?[bi])\]!<$1>!g;
3485      $retVal =~ s!\[p\]!</p><p>!g;      $retVal =~ s!\[p\]!</p><p>!g;
3486        $retVal =~ s!\[link\s+([^\]]+)\]!<a href="$1">!g;
3487        $retVal =~ s!\[/link\]!</a>!g;
3488      # Return the result.      # Return the result.
3489      return $retVal;      return $retVal;
3490  }  }
3491    
3492    =head3 BeginTran
3493    
3494    C<< $erdb->BeginTran(); >>
3495    
3496    Start a database transaction.
3497    
3498    =cut
3499    
3500    sub BeginTran {
3501        my ($self) = @_;
3502        $self->{_dbh}->begin_tran();
3503    
3504    }
3505    
3506    =head3 CommitTran
3507    
3508    C<< $erdb->CommitTran(); >>
3509    
3510    Commit an active database transaction.
3511    
3512    =cut
3513    
3514    sub CommitTran {
3515        my ($self) = @_;
3516        $self->{_dbh}->commit_tran();
3517    }
3518    
3519    =head3 RollbackTran
3520    
3521    C<< $erdb->RollbackTran(); >>
3522    
3523    Roll back an active database transaction.
3524    
3525    =cut
3526    
3527    sub RollbackTran {
3528        my ($self) = @_;
3529        $self->{_dbh}->roll_tran();
3530    }
3531    
3532    
3533  =head2 Data Mining Methods  =head2 Data Mining Methods
3534    
# Line 3184  Line 3685 
3685    
3686  =head2 Virtual Methods  =head2 Virtual Methods
3687    
3688    =head3 _CreatePPOIndex
3689    
3690    C<< my $index = ERDB::_CreatePPOIndex($indexObject); >>
3691    
3692    Convert the XML for an ERDB index to the XML structure for a PPO
3693    index.
3694    
3695    =over 4
3696    
3697    ERDB XML structure for an index.
3698    
3699    =item RETURN
3700    
3701    PPO XML structure for the same index.
3702    
3703    =back
3704    
3705    =cut
3706    
3707    sub _CreatePPOIndex {
3708        # Get the parameters.
3709        my ($indexObject) = @_;
3710        # The incoming index contains a list of the index fields in the IndexFields
3711        # member. We loop through it to create the index tags.
3712        my @fields = map { { label => _FixName($_->{name}) } } @{$indexObject->{IndexFields}};
3713        # Wrap the fields in attribute tags.
3714        my $retVal = { attribute => \@fields };
3715        # Return the result.
3716        return $retVal;
3717    }
3718    
3719    =head3 _CreatePPOField
3720    
3721    C<< my $fieldXML = ERDB::_CreatePPOField($fieldName, $fieldObject); >>
3722    
3723    Convert the ERDB XML structure for a field to a PPO scalar XML structure.
3724    
3725    =over 4
3726    
3727    =item fieldName
3728    
3729    Name of the scalar field.
3730    
3731    =item fieldObject
3732    
3733    ERDB XML structure describing the field.
3734    
3735    =item RETURN
3736    
3737    Returns a PPO XML structure for the same field.
3738    
3739    =back
3740    
3741    =cut
3742    
3743    sub _CreatePPOField {
3744        # Get the parameters.
3745        my ($fieldName, $fieldObject) = @_;
3746        # Get the field type.
3747        my $type = $TypeTable{$fieldObject->{type}}->{sqlType};
3748        # Fix up the field name.
3749        $fieldName = _FixName($fieldName);
3750        # Build the scalar tag.
3751        my $retVal = { label => $fieldName, type => $type };
3752        # Return the result.
3753        return $retVal;
3754    }
3755    
3756  =head3 CleanKeywords  =head3 CleanKeywords
3757    
3758  C<< my $cleanedString = $erdb->CleanKeywords($searchExpression); >>  C<< my $cleanedString = $erdb->CleanKeywords($searchExpression); >>
# Line 3235  Line 3804 
3804    
3805  C<< my @relationMap = _RelationMap($mappedNameHashRef, $mappedNameListRef); >>  C<< my @relationMap = _RelationMap($mappedNameHashRef, $mappedNameListRef); >>
3806    
3807  Create the relation map for an SQL query. The relation map is used by B<DBObject>  Create the relation map for an SQL query. The relation map is used by B<ERDBObject>
3808  to determine how to interpret the results of the query.  to determine how to interpret the results of the query.
3809    
3810  =over 4  =over 4
# Line 3252  Line 3821 
3821  =item RETURN  =item RETURN
3822    
3823  Returns a list of 2-tuples. Each tuple consists of an object name as used in the  Returns a list of 2-tuples. Each tuple consists of an object name as used in the
3824  query followed by the actual name of that object. This enables the B<DBObject> to  query followed by the actual name of that object. This enables the B<ERDBObject> to
3825  determine the order of the tables in the query and which object name belongs to each  determine the order of the tables in the query and which object name belongs to each
3826  mapped object name. Most of the time these two values are the same; however, if a  mapped object name. Most of the time these two values are the same; however, if a
3827  relation occurs twice in the query, the relation name in the field list and WHERE  relation occurs twice in the query, the relation name in the field list and WHERE
# Line 3795  Line 4364 
4364    
4365  =head3 _LoadMetaData  =head3 _LoadMetaData
4366    
4367    C<< my $metadata = ERDB::_LoadMetaData($filename); >>
4368    
4369  This method loads the data describing this database from an XML file into a metadata structure.  This method loads the data describing this database from an XML file into a metadata structure.
4370  The resulting structure is a set of nested hash tables containing all the information needed to  The resulting structure is a set of nested hash tables containing all the information needed to
4371  load or use the database. The schema for the XML file is F<ERDatabase.xml>.  load or use the database. The schema for the XML file is F<ERDatabase.xml>.
# Line 3944  Line 4515 
4515              if ($found == 0) {              if ($found == 0) {
4516                  push @{$indexList}, { IndexFields => [ {name => 'id', order => 'ascending'} ] };                  push @{$indexList}, { IndexFields => [ {name => 'id', order => 'ascending'} ] };
4517              }              }
4518              # Now we need to convert the relation's index list to an index table. We begin by creating              # Attach all the indexes to the relation.
4519              # an empty table in the relation structure.              _ProcessIndexes($indexList, $relation);
             $relation->{Indexes} = { };  
             # Loop through the indexes.  
             my $count = 0;  
             for my $index (@{$indexList}) {  
                 # Add this index to the index table.  
                 _AddIndex("idx$count", $relation, $index);  
                 # Increment the counter so that the next index has a different name.  
                 $count++;  
             }  
4520          }          }
4521          # Finally, we add the relation structure to the entity.          # Finally, we add the relation structure to the entity.
4522          $entityStructure->{Relations} = $relationTable;          $entityStructure->{Relations} = $relationTable;
# Line 3968  Line 4530 
4530          _FixupFields($relationshipStructure, $relationshipName, 2, 3);          _FixupFields($relationshipStructure, $relationshipName, 2, 3);
4531          # Format a description for the FROM field.          # Format a description for the FROM field.
4532          my $fromEntity = $relationshipStructure->{from};          my $fromEntity = $relationshipStructure->{from};
4533          my $fromComment = "<b>id</b> of the source <b><a href=\"#$fromEntity\">$fromEntity</a></b>.";          my $fromComment = "[b]id[/b] of the source [b][link #$fromEntity]$fromEntity\[/link][/b].";
4534          # Get the FROM entity's key type.          # Get the FROM entity's key type.
4535          my $fromType = $entityList->{$fromEntity}->{keyType};          my $fromType = $entityList->{$fromEntity}->{keyType};
4536          # Add the FROM field.          # Add the FROM field.
# Line 3978  Line 4540 
4540                                                      PrettySort => 1});                                                      PrettySort => 1});
4541          # Format a description for the TO field.          # Format a description for the TO field.
4542          my $toEntity = $relationshipStructure->{to};          my $toEntity = $relationshipStructure->{to};
4543          my $toComment = "<b>id</b> of the target <b><a href=\"#$toEntity\">$toEntity</a></b>.";          my $toComment = "[b]id[/b] of the target [b][link #$toEntity]$toEntity\[/link][/b].";
4544          # Get the TO entity's key type.          # Get the TO entity's key type.
4545          my $toType = $entityList->{$toEntity}->{keyType};          my $toType = $entityList->{$toEntity}->{keyType};
4546          # Add the TO field.          # Add the TO field.
# Line 3990  Line 4552 
4552          my $thisRelation = { Fields => _ReOrderRelationTable($relationshipStructure->{Fields}),          my $thisRelation = { Fields => _ReOrderRelationTable($relationshipStructure->{Fields}),
4553                               Indexes => { } };                               Indexes => { } };
4554          $relationshipStructure->{Relations} = { $relationshipName => $thisRelation };          $relationshipStructure->{Relations} = { $relationshipName => $thisRelation };
4555    
4556            # Add the alternate indexes (if any). This MUST be done before the FROM and
4557            # TO indexes, because it erases the relation's index list.
4558            if (exists $relationshipStructure->{Indexes}) {
4559                _ProcessIndexes($relationshipStructure->{Indexes}, $thisRelation);
4560            }
4561            # Add the relation to the master table.
4562          # Create the FROM and TO indexes.          # Create the FROM and TO indexes.
4563          _CreateRelationshipIndex("From", $relationshipName, $relationshipStructure);          _CreateRelationshipIndex("From", $relationshipName, $relationshipStructure);
4564          _CreateRelationshipIndex("To", $relationshipName, $relationshipStructure);          _CreateRelationshipIndex("To", $relationshipName, $relationshipStructure);
         # Add the relation to the master table.  
4565          $masterRelationTable{$relationshipName} = $thisRelation;          $masterRelationTable{$relationshipName} = $thisRelation;
4566      }      }
4567      # Now store the master relation table in the metadata structure.      # Now store the master relation table in the metadata structure.
# Line 4152  Line 4720 
4720      _AddIndex("idx$indexKey", $relationStructure, $newIndex);      _AddIndex("idx$indexKey", $relationStructure, $newIndex);
4721  }  }
4722    
4723    =head3 _ProcessIndexes
4724    
4725    C<< ERDB::_ProcessIndexes($indexList, $relation); >>
4726    
4727    Build the data structures for the specified indexes in the specified relation.
4728    
4729    =over 4
4730    
4731    =item indexList
4732    
4733    Reference to a list of indexes. Each index is a hash reference containing an optional
4734    C<Notes> value that describes the index and an C<IndexFields> value that is a reference
4735    to a list of index field structures. An index field structure, in turn, is a reference
4736    to a hash that contains a C<name> attribute for the field name and an C<order>
4737    attribute that specifies either C<ascending> or C<descending>. In this sense the
4738    index list encapsulates the XML C<Indexes> structure in the database definition.
4739    
4740    =item relation
4741    
4742    The structure that describes the current relation. The new index descriptors will
4743    be stored in the structure's C<Indexes> member. Any previous data in the structure
4744    will be lost.
4745    
4746    =back
4747    
4748    =cut
4749    
4750    sub _ProcessIndexes {
4751        # Get the parameters.
4752        my ($indexList, $relation) = @_;
4753        # Now we need to convert the relation's index list to an index table. We begin by creating
4754        # an empty table in the relation structure.
4755        $relation->{Indexes} = { };
4756        # Loop through the indexes.
4757        my $count = 0;
4758        for my $index (@{$indexList}) {
4759            # Add this index to the index table.
4760            _AddIndex("idx$count", $relation, $index);
4761            # Increment the counter so that the next index has a different name.
4762            $count++;
4763        }
4764    }
4765    
4766  =head3 _AddIndex  =head3 _AddIndex
4767    
4768  Add an index to a relation structure.  Add an index to a relation structure.
# Line 4681  Line 5292 
5292      # Compute the number of columns.      # Compute the number of columns.
5293      my $colCount = @colNames;      my $colCount = @colNames;
5294      # Generate the title row.      # Generate the title row.
5295      my $htmlString = "<p><table border=\"2\"><tr><td colspan=\"$colCount\" align=\"center\">$tablename</td></tr>\n";      my $htmlString = "<table border=\"2\"><tr><td colspan=\"$colCount\" align=\"center\">$tablename</td></tr>\n";
5296      # Loop through the columns, adding the column header rows.      # Loop through the columns, adding the column header rows.
5297      $htmlString .= "<tr>";      $htmlString .= "<tr>";
5298      for my $colName (@colNames) {      for my $colName (@colNames) {
# Line 4700  Line 5311 
5311  =cut  =cut
5312    
5313  sub _CloseTable {  sub _CloseTable {
5314      return "</table></p>\n";      return "</table>\n";
5315  }  }
5316    
5317  =head3 _ShowField  =head3 _ShowField

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