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1 | #!/usr/bin/perl -w |
2 | # vim: set ft=perl: |
3 | |
4 | # ------------------------------------------------------------------- |
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5 | # $Id$ |
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6 | # ------------------------------------------------------------------- |
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7 | # Copyright (C) 2002-2009 The SQLFairy Authors |
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8 | # |
9 | # This program is free software; you can redistribute it and/or |
10 | # modify it under the terms of the GNU General Public License as |
11 | # published by the Free Software Foundation; version 2. |
12 | # |
13 | # This program is distributed in the hope that it will be useful, but |
14 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | # General Public License for more details. |
17 | # |
18 | # You should have received a copy of the GNU General Public License |
19 | # along with this program; if not, write to the Free Software |
20 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
21 | # 02111-1307 USA |
22 | # ------------------------------------------------------------------- |
23 | |
24 | =head1 NAME |
25 | |
26 | sqlt-diff - find the differences b/w two schemas |
27 | |
28 | =head1 SYNOPSIS |
29 | |
30 | For help: |
31 | |
32 | sqlt-diff -h|--help |
33 | |
34 | For a list of all valid parsers: |
35 | |
36 | sqlt -l|--list |
37 | |
38 | To diff two schemas: |
39 | |
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40 | sqlt-diff [options] file_name1=parser1 file_name2=parser2 |
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41 | |
42 | Options: |
43 | |
44 | -d|--debug Show debugging info |
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45 | -t|--trace Turn on tracing for Parse::RecDescent |
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46 | -c|--case-insensitive Compare tables/columns case-insensitively |
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47 | --ignore-index-names Ignore index name differences |
48 | --ignore-constraint-names Ignore constraint name differences |
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49 | --mysql_parser_version=<#####> Specify a target MySQL parser version |
50 | for dealing with /*! comments |
51 | --output-db=<Producer> This Producer will be used instead of one |
52 | corresponding to parser1 to format output |
53 | for new tables |
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54 | --ignore-view-sql Ignore view SQL differences |
55 | --ignore-proc-sql Ignore procedure SQL differences |
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56 | --no-batch-alters Do not clump multile alters to the same table into a |
57 | single ALTER TABLE statement where possible. |
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58 | |
59 | =head1 DESCRIPTION |
60 | |
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61 | sqlt-diff is a utility for creating a file of SQL commands necessary to |
62 | transform the first schema provided to the second. While not yet |
63 | exhaustive in its ability to mutate the entire schema, it will report the |
64 | following |
65 | |
66 | =over |
67 | |
68 | =item * New tables |
69 | |
70 | Using the Producer class of the target (second) schema, any tables missing |
71 | in the first schema will be generated in their entirety (fields, constraints, |
72 | indices). |
73 | |
74 | =item * Missing/altered fields |
75 | |
76 | Any fields missing or altered between the two schemas will be reported |
77 | as: |
78 | |
79 | ALTER TABLE <table_name> |
80 | [DROP <field_name>] |
81 | [CHANGE <field_name> <datatype> (<size>)] ; |
82 | |
83 | =item * Missing/altered indices |
84 | |
85 | Any indices missing or of a different type or on different fields will be |
86 | indicated. Indices that should be dropped will be reported as such: |
87 | |
88 | DROP INDEX <index_name> ON <table_name> ; |
89 | |
90 | An index of a different type or on different fields will be reported as a |
91 | new index as such: |
92 | |
93 | CREATE [<index_type>] INDEX [<index_name>] ON <table_name> |
94 | ( <field_name>[,<field_name>] ) ; |
95 | |
96 | =back |
97 | |
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98 | ALTER, CREATE, DROP statements are created by |
99 | SQL::Translator::Producer::*, see there for support/problems. |
100 | |
101 | Currently (v0.0900), only MySQL is supported by this code. |
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102 | |
103 | =cut |
104 | |
105 | # ------------------------------------------------------------------- |
106 | |
107 | use strict; |
108 | use Pod::Usage; |
109 | use Data::Dumper; |
110 | use SQL::Translator; |
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111 | use SQL::Translator::Diff; |
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112 | use SQL::Translator::Schema::Constants; |
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113 | |
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114 | use vars qw( $VERSION ); |
115 | $VERSION = '1.99'; |
116 | |
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117 | my ( @input, $list, $help, $debug, $trace, $caseopt, $ignore_index_names, |
118 | $ignore_constraint_names, $output_db, $mysql_parser_version, |
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119 | $ignore_view_sql, $ignore_proc_sql, $no_batch_alters ); |
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120 | for my $arg ( @ARGV ) { |
121 | if ( $arg =~ m/^-?-l(ist)?$/ ) { |
122 | $list = 1; |
123 | } |
124 | elsif ( $arg =~ m/^-?-h(elp)?$/ ) { |
125 | $help = 1; |
126 | } |
127 | elsif ( $arg =~ m/^-?-d(ebug)?$/ ) { |
128 | $debug = 1; |
129 | } |
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130 | elsif ( $arg =~ m/^-?-t(race)?$/ ) { |
131 | $trace = 1; |
132 | } |
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133 | elsif ( $arg =~ m/^-?-c(ase-insensitive)?$/ ) { |
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134 | $caseopt = 1; |
135 | } |
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136 | elsif ( $arg =~ m/^--ignore-index-names$/ ) { |
137 | $ignore_index_names = 1; |
138 | } |
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139 | elsif ( $arg =~ m/^--ignore-constraint-names$/ ) { |
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140 | $ignore_constraint_names = 1; |
141 | } |
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142 | elsif ( $arg =~ m/^--mysql-parser-version=(.+)$/ ) { |
143 | $mysql_parser_version = $1; |
144 | } |
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145 | elsif ( $arg =~ m/^--output-db=(.+)$/ ) { |
146 | $output_db = $1; |
147 | } |
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148 | elsif ( $arg =~ m/^--ignore-view-sql$/ ) { |
149 | $ignore_view_sql = 1; |
150 | } |
151 | elsif ( $arg =~ m/^--ignore-proc-sql$/ ) { |
152 | $ignore_proc_sql = 1; |
153 | } |
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154 | elsif ( $arg =~ m/^([^=]+)=(.+)$/ ) { |
155 | push @input, { file => $1, parser => $2 }; |
156 | } |
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157 | elsif ( $arg =~ m/^--no-batch-alters$/ ) { |
158 | $no_batch_alters = 1; |
159 | } |
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160 | else { |
161 | pod2usage( msg => "Unknown argument '$arg'" ); |
162 | } |
163 | } |
164 | |
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165 | print STDERR <<'EOM'; |
166 | This code is experimental, currently the new code only supports MySQL or |
167 | SQLite diffing. To add support for other databases, please patch the relevant |
168 | SQL::Translator::Producer:: module. If you need compatibility with the old |
169 | sqlt-diff, please use sqlt-diff-old, and look into helping us make this one |
170 | work for you |
171 | EOM |
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172 | |
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173 | pod2usage(1) if $help || !@ARGV; |
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174 | pod2usage('Please specify only two schemas to diff') if scalar @input > 2; |
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175 | |
176 | my $tr = SQL::Translator->new; |
177 | my @parsers = $tr->list_parsers; |
178 | my %valid_parsers = map { $_, 1 } @parsers; |
179 | |
180 | if ( $list ) { |
181 | print "\nParsers:\n", map { "\t$_\n" } sort @parsers; |
182 | print "\n"; |
183 | exit(0); |
184 | } |
185 | |
186 | pod2usage( msg => 'Too many file args' ) if @input > 2; |
187 | |
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188 | my ( $source_schema, $source_db, $target_schema, $target_db ) = map { |
189 | my $file = $_->{'file'}; |
190 | my $parser = $_->{'parser'}; |
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191 | |
192 | die "Unable to read file '$file'\n" unless -r $file; |
193 | die "'$parser' is an invalid parser\n" unless $valid_parsers{ $parser }; |
194 | |
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195 | my $t = SQL::Translator->new(parser_args => {mysql_parser_version => $mysql_parser_version}); |
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196 | $t->debug( $debug ); |
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197 | $t->trace( $trace ); |
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198 | $t->parser( $parser ) or die $tr->error; |
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199 | my $out = $t->translate( $file ) or die $tr->error; |
200 | my $schema = $t->schema; |
201 | unless ( $schema->name ) { |
202 | $schema->name( $file ); |
203 | } |
204 | |
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205 | ($schema, $parser); |
206 | } @input; |
207 | |
208 | my $result = SQL::Translator::Diff::schema_diff($source_schema, $source_db, |
209 | $target_schema, $target_db, |
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210 | { caseopt => $caseopt, |
211 | ignore_index_names => $ignore_index_names, |
212 | ignore_constraint_names => $ignore_constraint_names, |
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213 | ignore_view_sql => $ignore_view_sql, |
214 | ignore_proc_sql => $ignore_proc_sql, |
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215 | output_db => $output_db, |
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216 | no_batch_alters => $no_batch_alters, |
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217 | debug => $debug, |
218 | trace => $trace }); |
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219 | if($result) |
220 | { |
221 | print $result; |
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222 | } |
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223 | else |
224 | { |
225 | print "No differences found."; |
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226 | } |
227 | |
228 | # ------------------------------------------------------------------- |
229 | # Bring out number weight & measure in a year of dearth. |
230 | # William Blake |
231 | # ------------------------------------------------------------------- |
232 | |
233 | =pod |
234 | |
235 | =head1 AUTHOR |
236 | |
237 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt>. |
238 | |
239 | =head1 SEE ALSO |
240 | |
241 | SQL::Translator, L<http://sqlfairy.sourceforge.net>. |
242 | |
243 | =cut |