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revision 1.9, Thu Jan 19 09:28:33 2006 UTC revision 1.16, Sun Jul 9 21:16:12 2006 UTC
# Line 28  Line 28 
28    
29  =head3 new  =head3 new
30    
31  C<< my $erload = ERDBLoad->new($erdb, $relationName, $directory); >>  C<< my $erload = ERDBLoad->new($erdb, $relationName, $directory, $loadOnly, $ignore); >>
32    
33  Begin loading an ERDB relation.  Begin loading an ERDB relation.
34    
# Line 51  Line 51 
51  TRUE if the data is to be loaded from an existing file, FALSE if a file is  TRUE if the data is to be loaded from an existing file, FALSE if a file is
52  to be created.  to be created.
53    
54    =item ignore
55    
56    TRUE if the data is to be discarded. This is used to save time when only
57    a subset of the tables need to be loaded: the data for the ignored tables
58    is simply discarded.
59    
60  =back  =back
61    
62  =cut  =cut
63    
64  sub new {  sub new {
65      # Get the parameters.      # Get the parameters.
66      my ($class, $erdb, $relationName, $directory, $loadOnly) = @_;      my ($class, $erdb, $relationName, $directory, $loadOnly, $ignore) = @_;
67      # Validate the directory name.      # Validate the directory name.
68      if (! -d $directory) {      if (! -d $directory) {
69          Confess("Load directory \"$directory\" not found.");          Confess("Load directory \"$directory\" not found.");
# Line 68  Line 74 
74      my $fileHandle;      my $fileHandle;
75      # Determine whether or not this is a primary relation.      # Determine whether or not this is a primary relation.
76      my $primary = ($erdb->_IsPrimary($relationName) ? 1 : 0);      my $primary = ($erdb->_IsPrimary($relationName) ? 1 : 0);
77      # Check to see if this is a load-only or a generate-and-load.      # Check to see if this is a load-only, ignore, or a generate-and-load.
78      if ($loadOnly) {      if ($ignore) {
79            Trace("Relation $relationName will be ignored.") if T(2);
80            $fileHandle = "";
81        } elsif ($loadOnly) {
82          Trace("Relation $relationName will be loaded from $fileName.") if T(2);          Trace("Relation $relationName will be loaded from $fileName.") if T(2);
83          $fileHandle = "";          $fileHandle = "";
84      } else {      } else {
85          # If this is a primary entity relation, sort the output to remove          # Determine the sort for this relation.
86          # duplicate keys.          my $fileString = "| " . $erdb->SortNeeded($relationName) . ">$fileName";
         my $fileString = ($erdb->IsEntity($relationName) ?  
                             "| sort +0 -1 -u -t \"\t\" >$fileName" :  
                             ">$fileName");  
87          # Open the output file and remember its handle.          # Open the output file and remember its handle.
88          $fileHandle = Open(undef, $fileString);          $fileHandle = Open(undef, $fileString);
89          Trace("Relation $relationName load file created with primary flag $primary.") if T(2);          Trace("Relation $relationName load file created with primary flag $primary.") if T(2);
# Line 91  Line 97 
97                    fileSize => 0,                    fileSize => 0,
98                    lineCount => 0,                    lineCount => 0,
99                    stats => Stats->new(),                    stats => Stats->new(),
100                    primary => $primary                    primary => $primary,
101                      ignore => ($ignore ? 1 : 0)
102                   };                   };
103      # Bless and return it.      # Bless and return it.
104      bless $retVal, $class;      bless $retVal, $class;
105      return $retVal;      return $retVal;
106  }  }
107    
108    =head3 Ignore
109    
110    C<< my $flag = $erload->Ignore; >>
111    
112    Return TRUE if we are ignoring this table, else FALSE.
113    
114    =cut
115    #: Return Type $;
116    sub Ignore {
117        # Get the parameters.
118        my ($self) = @_;
119        # Return the result.
120        return $self->{ignore};
121    }
122    
123  =head3 Put  =head3 Put
124    
125  C<< my  = $erload->Put($field1, $field2, ..., $fieldN); >>  C<< my  = $erload->Put($field1, $field2, ..., $fieldN); >>
# Line 120  Line 142 
142  sub Put {  sub Put {
143      # Get the ERDBLoad instance and the field list.      # Get the ERDBLoad instance and the field list.
144      my ($self, @rawFields) = @_;      my ($self, @rawFields) = @_;
145        # Only proceed if we're not ignoring.
146        if (! $self->{ignore}) {
147            # Convert the hash-string fields to their digested value.
148            $self->{dbh}->DigestFields($self->{relName}, \@rawFields);
149      # Insure the field values are okay.      # Insure the field values are okay.
150      my $truncates = $self->{dbh}->VerifyFields($self->{relName}, \@rawFields);      my $truncates = $self->{dbh}->VerifyFields($self->{relName}, \@rawFields);
151      # Run through the list of field values, escaping them.      # Run through the list of field values, escaping them.
# Line 143  Line 169 
169          $self->Add("truncated", $truncates);          $self->Add("truncated", $truncates);
170      }      }
171  }  }
172    }
173    
174  =head3 Add  =head3 Add
175    
# Line 179  Line 206 
206    
207  C<< my $stats = $erload->Finish(); >>  C<< my $stats = $erload->Finish(); >>
208    
209  Finish loading the table. This closes the load file and loads its contents into the database.  Finish loading the table. This closes the load file.
 It also creates the indexes if the DBMS uses post-indexing.  
210    
211  =over 4  =over 4
212    
# Line 196  Line 222 
222  sub Finish {  sub Finish {
223      # Get this object instance.      # Get this object instance.
224      my ($self) = @_;      my ($self) = @_;
225        if ($self->{fh}) {
226      # Close the load file.      # Close the load file.
227      close $self->{fh};      close $self->{fh};
228        }
229      # Return the statistics object.      # Return the statistics object.
230      return $self->{stats};      return $self->{stats};
231  }  }

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