3 # -------------------------------------------------------------------
4 # Copyright (C) 2002-2009 SQLFairy Authors
6 # This program is free software; you can redistribute it and/or
7 # modify it under the terms of the GNU General Public License as
8 # published by the Free Software Foundation; version 2.
10 # This program is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 # -------------------------------------------------------------------
23 sqlt-graph - Automatically create a graph from a database schema
27 ./sqlt-graph -d|--db|-f|--from=db_parser [options] schema.sql
31 -l|--layout Layout schema for GraphViz
32 ("dot," "neato," "twopi"; default "dot")
33 -n|--node-shape Shape of the nodes ("record," "plaintext,"
34 "ellipse," "circle," "egg," "triangle," "box,"
35 "diamond," "trapezium," "parallelogram," "house,"
36 "hexagon," "octagon," default "record")
37 -o|--output Output file name (default STDOUT)
38 -t|--output-type Output file type ("canon", "text," "ps," "hpgl,"
39 "pcl," "mif," "pic," "gd," "gd2," "gif," "jpeg,"
40 "png," "wbmp," "cmap," "ismap," "imap," "vrml,"
41 "vtx," "mp," "fig," "svg," "plain," default "png")
43 --cluster Cluster tables
44 --no-fields Don't show field names
45 --height Image height (in inches, default "11",
46 set to "0" to undefine)
47 --width Image width (in inches, default "8.5",
48 set to "0" to undefine)
49 --fontsize custom font size for node and edge labels
50 --fontname name of custom font (or full path to font file) for
51 node, edge, and graph labels
52 --nodeattr attribute name and value (in key=val syntax) for
53 nodes; this option may be repeated to specify
54 multiple node attributes
55 --edgeattr same as --nodeattr, but for edge attributes
56 --graphattr same as --nodeattr, but for graph attributes
57 --natural-join Perform natural joins
58 --natural-join-pk Perform natural joins from primary keys only
59 --show-datatypes Show datatype of each field
60 --show-sizes Show column sizes for VARCHAR and CHAR fields
61 --show-constraints Show list of constraints for each field
62 -s|--skip Fields to skip in natural joins
63 --skip-tables Comma-separated list of table names to exclude
64 --skip-tables-like Comma-separated list of regexen to exclude tables
65 --debug Print debugging information
69 This script will create a graph of your schema. Only the database
70 driver argument (for SQL::Translator) is required. If no output file
71 name is given, then image will be printed to STDOUT, so you should
72 redirect the output into a file.
74 The default action is to assume the presence of foreign key
75 relationships defined via "REFERNCES" or "FOREIGN KEY" constraints on
76 the tables. If you are parsing the schema of a file that does not
77 have these, you will find the natural join options helpful. With
78 natural joins, like-named fields will be considered foreign keys.
79 This can prove too permissive, however, as you probably don't want a
80 field called "name" to be considered a foreign key, so you could
81 include it in the "skip" option, and all fields called "name" will be
82 excluded from natural joins. A more efficient method, however, might
83 be to simply deduce the foriegn keys from primary keys to other fields
84 named the same in other tables. Use the "natural-join-pk" option
87 If the schema defines foreign keys, then the graph produced will be
88 directed showing the direction of the relationship. If the foreign
89 keys are intuited via natural joins, the graph will be undirected.
91 Clustering of tables allows you to group and box tables according to
92 function or domain or whatever criteria you choose. The syntax for
95 cluster1=table1,table2;cluster2=table3,table4
99 # -------------------------------------------------------------------
116 $layout, $node_shape, $out_file, $output_type, $db_driver, $add_color,
117 $natural_join, $join_pk_only, $skip_fields, $show_datatypes,
118 $show_sizes, $show_constraints, $debug, $help, $height, $width,
119 $no_fields, $fontsize, $fontname, $skip_tables, $skip_tables_like,
123 # multi-valued options:
129 'd|db|f|from=s' => \$db_driver,
130 'o|output:s' => \$out_file,
131 'l|layout:s' => \$layout,
132 'n|node-shape:s' => \$node_shape,
133 't|output-type:s' => \$output_type,
134 'height:f' => \$height,
135 'width:f' => \$width,
136 'fontsize=i' => \$fontsize,
137 'fontname=s' => \$fontname,
138 'nodeattr=s' => \%nodeattrs,
139 'edgeattr=s' => \%edgeattrs,
140 'graphattr=s' => \%graphattrs,
141 'c|color' => \$add_color,
142 'cluster:s' => \$cluster,
143 'no-fields' => \$no_fields,
144 'natural-join' => \$natural_join,
145 'natural-join-pk' => \$join_pk_only,
146 's|skip:s' => \$skip_fields,
147 'skip-tables:s' => \$skip_tables,
148 'skip-tables-like:s' => \$skip_tables_like,
149 'show-datatypes' => \$show_datatypes,
150 'show-sizes' => \$show_sizes,
151 'show-constraints' => \$show_constraints,
155 my @files = @ARGV; # the create script(s) for the original db
157 pod2usage(1) if $help;
158 pod2usage( -message => "No db driver specified" ) unless $db_driver;
159 pod2usage( -message => 'No input file' ) unless @files;
161 my $translator = SQL::Translator->new(
164 debug => $debug || 0,
166 out_file => $out_file,
168 node_shape => $node_shape,
169 output_type => $output_type,
170 add_color => $add_color,
171 natural_join => $natural_join,
172 natural_join_pk => $join_pk_only,
173 skip_fields => $skip_fields,
174 skip_tables => $skip_tables,
175 skip_tables_like => $skip_tables_like,
176 show_datatypes => $show_datatypes,
177 show_sizes => $show_sizes,
178 show_constraints => $show_constraints,
180 height => $height || 0,
181 width => $width || 0,
182 fontsize => $fontsize,
183 fontname => $fontname,
184 nodeattrs => \%nodeattrs,
185 edgeattrs => \%edgeattrs,
186 graphattrs => \%graphattrs,
187 show_fields => $no_fields ? 0 : 1,
189 ) or die SQL::Translator->error;
191 for my $file (@files) {
192 my $output = $translator->translate( $file ) or die
193 "Error: " . $translator->error;
195 print "Image written to '$out_file'. Done.\n";
202 # -------------------------------------------------------------------
208 Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>.
212 perl, SQL::Translator.