5 sqlt-graph - Automatically create a graph from a database schema
9 ./sqlt-graph -d|--db|-f|--from=db_parser [options] schema.sql
13 -l|--layout Layout schema for GraphViz
14 ("dot," "neato," "twopi"; default "dot")
15 -n|--node-shape Shape of the nodes ("record," "plaintext,"
16 "ellipse," "circle," "egg," "triangle," "box,"
17 "diamond," "trapezium," "parallelogram," "house,"
18 "hexagon," "octagon," default "record")
19 -o|--output Output file name (default STDOUT)
20 -t|--output-type Output file type ("canon", "text," "ps," "hpgl,"
21 "pcl," "mif," "pic," "gd," "gd2," "gif," "jpeg,"
22 "png," "wbmp," "cmap," "ismap," "imap," "vrml,"
23 "vtx," "mp," "fig," "svg," "plain," default "png")
25 --cluster Cluster tables
26 --no-fields Don't show field names
27 --height Image height (in inches, default "11",
28 set to "0" to undefine)
29 --width Image width (in inches, default "8.5",
30 set to "0" to undefine)
31 --fontsize custom font size for node and edge labels
32 --fontname name of custom font (or full path to font file) for
33 node, edge, and graph labels
34 --nodeattr attribute name and value (in key=val syntax) for
35 nodes; this option may be repeated to specify
36 multiple node attributes
37 --edgeattr same as --nodeattr, but for edge attributes
38 --graphattr same as --nodeattr, but for graph attributes
39 --natural-join Perform natural joins
40 --natural-join-pk Perform natural joins from primary keys only
41 --show-datatypes Show datatype of each field
42 --show-sizes Show column sizes for VARCHAR and CHAR fields
43 --show-constraints Show list of constraints for each field
44 -s|--skip Fields to skip in natural joins
45 --skip-tables Comma-separated list of table names to exclude
46 --skip-tables-like Comma-separated list of regexen to exclude tables
47 --debug Print debugging information
51 This script will create a graph of your schema. Only the database
52 driver argument (for SQL::Translator) is required. If no output file
53 name is given, then image will be printed to STDOUT, so you should
54 redirect the output into a file.
56 The default action is to assume the presence of foreign key
57 relationships defined via "REFERNCES" or "FOREIGN KEY" constraints on
58 the tables. If you are parsing the schema of a file that does not
59 have these, you will find the natural join options helpful. With
60 natural joins, like-named fields will be considered foreign keys.
61 This can prove too permissive, however, as you probably don't want a
62 field called "name" to be considered a foreign key, so you could
63 include it in the "skip" option, and all fields called "name" will be
64 excluded from natural joins. A more efficient method, however, might
65 be to simply deduce the foriegn keys from primary keys to other fields
66 named the same in other tables. Use the "natural-join-pk" option
69 If the schema defines foreign keys, then the graph produced will be
70 directed showing the direction of the relationship. If the foreign
71 keys are intuited via natural joins, the graph will be undirected.
73 Clustering of tables allows you to group and box tables according to
74 function or domain or whatever criteria you choose. The syntax for
77 cluster1=table1,table2;cluster2=table3,table4
81 # -------------------------------------------------------------------
98 $layout, $node_shape, $out_file, $output_type, $db_driver, $add_color,
99 $natural_join, $join_pk_only, $skip_fields, $show_datatypes,
100 $show_sizes, $show_constraints, $debug, $help, $height, $width,
101 $no_fields, $fontsize, $fontname, $skip_tables, $skip_tables_like,
105 # multi-valued options:
111 'd|db|f|from=s' => \$db_driver,
112 'o|output:s' => \$out_file,
113 'l|layout:s' => \$layout,
114 'n|node-shape:s' => \$node_shape,
115 't|output-type:s' => \$output_type,
116 'height:f' => \$height,
117 'width:f' => \$width,
118 'fontsize=i' => \$fontsize,
119 'fontname=s' => \$fontname,
120 'nodeattr=s' => \%nodeattrs,
121 'edgeattr=s' => \%edgeattrs,
122 'graphattr=s' => \%graphattrs,
123 'c|color' => \$add_color,
124 'cluster:s' => \$cluster,
125 'no-fields' => \$no_fields,
126 'natural-join' => \$natural_join,
127 'natural-join-pk' => \$join_pk_only,
128 's|skip:s' => \$skip_fields,
129 'skip-tables:s' => \$skip_tables,
130 'skip-tables-like:s' => \$skip_tables_like,
131 'show-datatypes' => \$show_datatypes,
132 'show-sizes' => \$show_sizes,
133 'show-constraints' => \$show_constraints,
137 my @files = @ARGV; # the create script(s) for the original db
139 pod2usage(1) if $help;
140 pod2usage( -message => "No db driver specified" ) unless $db_driver;
141 pod2usage( -message => 'No input file' ) unless @files;
143 my $translator = SQL::Translator->new(
146 debug => $debug || 0,
148 out_file => $out_file,
150 node_shape => $node_shape,
151 output_type => $output_type,
152 add_color => $add_color,
153 natural_join => $natural_join,
154 natural_join_pk => $join_pk_only,
155 skip_fields => $skip_fields,
156 skip_tables => $skip_tables,
157 skip_tables_like => $skip_tables_like,
158 show_datatypes => $show_datatypes,
159 show_sizes => $show_sizes,
160 show_constraints => $show_constraints,
162 height => $height || 0,
163 width => $width || 0,
164 fontsize => $fontsize,
165 fontname => $fontname,
166 nodeattrs => \%nodeattrs,
167 edgeattrs => \%edgeattrs,
168 graphattrs => \%graphattrs,
169 show_fields => $no_fields ? 0 : 1,
171 ) or die SQL::Translator->error;
173 for my $file (@files) {
174 my $output = $translator->translate( $file ) or die
175 "Error: " . $translator->error;
177 print "Image written to '$out_file'. Done.\n";
184 # -------------------------------------------------------------------
190 Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>.
194 perl, SQL::Translator.