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1 | #!/usr/bin/env perl |
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2 | |
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3 | =head1 NAME |
4 | |
5 | sqlt-graph - Automatically create a graph from a database schema |
6 | |
7 | =head1 SYNOPSIS |
8 | |
9 | ./sqlt-graph -d|--db|-f|--from=db_parser [options] schema.sql |
10 | |
11 | Options: |
12 | |
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") |
24 | -c|--color Add colors |
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25 | --cluster Cluster tables |
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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) |
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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 |
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39 | --natural-join Perform natural joins |
40 | --natural-join-pk Perform natural joins from primary keys only |
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41 | --show-datatypes Show datatype of each field |
42 | --show-sizes Show column sizes for VARCHAR and CHAR fields |
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43 | --show-constraints Show list of constraints for each field |
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44 | -s|--skip Fields to skip in natural joins |
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45 | --skip-tables Comma-separated list of table names to exclude |
46 | --skip-tables-like Comma-separated list of regexen to exclude tables |
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47 | --debug Print debugging information |
48 | |
49 | =head1 DESCRIPTION |
50 | |
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. |
55 | |
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 |
67 | to acheive this. |
68 | |
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. |
72 | |
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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 |
75 | clustering tables is: |
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76 | |
77 | cluster1=table1,table2;cluster2=table3,table4 |
78 | |
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79 | =cut |
80 | |
81 | # ------------------------------------------------------------------- |
82 | |
83 | use strict; |
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84 | use warnings; |
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85 | use Data::Dumper; |
86 | use Getopt::Long; |
87 | use GraphViz; |
88 | use Pod::Usage; |
89 | use SQL::Translator; |
90 | |
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91 | use vars '$VERSION'; |
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92 | $VERSION = '1.59'; |
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93 | |
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94 | # |
95 | # Get arguments. |
96 | # |
97 | my ( |
98 | $layout, $node_shape, $out_file, $output_type, $db_driver, $add_color, |
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99 | $natural_join, $join_pk_only, $skip_fields, $show_datatypes, |
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100 | $show_sizes, $show_constraints, $debug, $help, $height, $width, |
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101 | $no_fields, $fontsize, $fontname, $skip_tables, $skip_tables_like, |
102 | $cluster |
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103 | ); |
104 | |
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105 | # multi-valued options: |
106 | my %edgeattrs = (); |
107 | my %nodeattrs = (); |
108 | my %graphattrs = (); |
109 | |
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110 | GetOptions( |
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111 | 'd|db|f|from=s' => \$db_driver, |
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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, |
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118 | 'fontsize=i' => \$fontsize, |
119 | 'fontname=s' => \$fontname, |
120 | 'nodeattr=s' => \%nodeattrs, |
121 | 'edgeattr=s' => \%edgeattrs, |
122 | 'graphattr=s' => \%graphattrs, |
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123 | 'c|color' => \$add_color, |
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124 | 'cluster:s' => \$cluster, |
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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, |
134 | 'debug' => \$debug, |
135 | 'h|help' => \$help, |
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136 | ) or die pod2usage; |
137 | my @files = @ARGV; # the create script(s) for the original db |
138 | |
139 | pod2usage(1) if $help; |
140 | pod2usage( -message => "No db driver specified" ) unless $db_driver; |
141 | pod2usage( -message => 'No input file' ) unless @files; |
142 | |
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143 | my $translator = SQL::Translator->new( |
144 | from => $db_driver, |
145 | to => 'GraphViz', |
146 | debug => $debug || 0, |
147 | producer_args => { |
148 | out_file => $out_file, |
149 | layout => $layout, |
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, |
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156 | skip_tables => $skip_tables, |
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157 | skip_tables_like => $skip_tables_like, |
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158 | show_datatypes => $show_datatypes, |
159 | show_sizes => $show_sizes, |
160 | show_constraints => $show_constraints, |
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161 | cluster => $cluster, |
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162 | height => $height || 0, |
163 | width => $width || 0, |
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164 | fontsize => $fontsize, |
165 | fontname => $fontname, |
166 | nodeattrs => \%nodeattrs, |
167 | edgeattrs => \%edgeattrs, |
168 | graphattrs => \%graphattrs, |
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169 | show_fields => $no_fields ? 0 : 1, |
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170 | }, |
171 | ) or die SQL::Translator->error; |
172 | |
173 | for my $file (@files) { |
174 | my $output = $translator->translate( $file ) or die |
175 | "Error: " . $translator->error; |
176 | if ( $out_file ) { |
177 | print "Image written to '$out_file'. Done.\n"; |
178 | } |
179 | else { |
180 | print $output; |
181 | } |
182 | } |
183 | |
184 | # ------------------------------------------------------------------- |
185 | |
186 | =pod |
187 | |
188 | =head1 AUTHOR |
189 | |
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190 | Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>. |
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191 | |
192 | =head1 SEE ALSO |
193 | |
194 | perl, SQL::Translator. |
195 | |
196 | =cut |