4 # -------------------------------------------------------------------
5 # Copyright (C) 2002-2009 The SQLFairy Authors
7 # This program is free software; you can redistribute it and/or
8 # modify it under the terms of the GNU General Public License as
9 # published by the Free Software Foundation; version 2.
11 # This program is distributed in the hope that it will be useful, but
12 # WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 # General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 # -------------------------------------------------------------------
24 sqlt-diff - find the differences b/w two schemas
32 For a list of all valid parsers:
38 sqlt-diff [options] file_name1=parser1 file_name2=parser2
42 -d|--debug Show debugging info
43 -t|--trace Turn on tracing for Parse::RecDescent
44 -c|--case-insensitive Compare tables/columns case-insensitively
45 --ignore-index-names Ignore index name differences
46 --ignore-constraint-names Ignore constraint name differences
47 --mysql_parser_version=<#####> Specify a target MySQL parser version
48 for dealing with /*! comments
49 --output-db=<Producer> This Producer will be used instead of one
50 corresponding to parser1 to format output
52 --ignore-view-sql Ignore view SQL differences
53 --ignore-proc-sql Ignore procedure SQL differences
54 --no-batch-alters Do not clump multile alters to the same table into a
55 single ALTER TABLE statement where possible.
56 --quote=<character> Use <character> to quote all table and field
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
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,
74 =item * Missing/altered fields
76 Any fields missing or altered between the two schemas will be reported
79 ALTER TABLE <table_name>
81 [CHANGE <field_name> <datatype> (<size>)] ;
83 =item * Missing/altered indices
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:
88 DROP INDEX <index_name> ON <table_name> ;
90 An index of a different type or on different fields will be reported as a
93 CREATE [<index_type>] INDEX [<index_name>] ON <table_name>
94 ( <field_name>[,<field_name>] ) ;
98 ALTER, CREATE, DROP statements are created by
99 SQL::Translator::Producer::*, see there for support/problems.
101 Currently (v0.0900), only MySQL is supported by this code.
105 # -------------------------------------------------------------------
113 use SQL::Translator::Diff;
114 use SQL::Translator::Schema::Constants;
116 use vars qw( $VERSION );
119 my ( @input, $list, $help, $debug, $trace, $caseopt, $ignore_index_names,
120 $ignore_constraint_names, $output_db, $mysql_parser_version,
121 $ignore_view_sql, $ignore_proc_sql, $no_batch_alters, $quote
127 'd|debug' => \$debug,
128 't|trace' => \$trace,
129 'c|case-insensitive' => \$caseopt,
130 'ignore-index-names' => \$ignore_index_names,
131 'ignore-constraint-names' => \$ignore_constraint_names,
132 'mysql_parser_version:s' => \$mysql_parser_version,
133 'output-db:s' => \$output_db,
134 'ignore-view-sql' => \$ignore_view_sql,
135 'ignore-proc-sql' => \$ignore_proc_sql,
136 'quote:s' => \$quote,
137 'no-batch-alters' => \$no_batch_alters,
140 for my $arg ( @ARGV ) {
141 if ( $arg =~ m/^([^=]+)=(.+)$/ ) {
142 push @input, { file => $1, parser => $2 };
146 print STDERR <<'EOM' unless $ENV{SQLT_NEWDIFF_NOWARN};
147 This code is experimental, currently the new code only supports MySQL or
148 SQLite diffing. To add support for other databases, please patch the relevant
149 SQL::Translator::Producer:: module. If you need compatibility with the old
150 sqlt-diff, please use sqlt-diff-old, and look into helping us make this one
154 my $tr = SQL::Translator->new;
155 my @parsers = $tr->list_parsers;
156 my %valid_parsers = map { $_, 1 } @parsers;
160 print "\nParsers:\n", map { "\t$_\n" } sort @parsers;
165 pod2usage(1) if $help || !@input;
166 pod2usage(msg => 'Please specify two schemas to diff') if scalar @input != 2;
168 my ( $source_schema, $source_db, $target_schema, $target_db ) = map {
169 my $file = $_->{'file'};
170 my $parser = $_->{'parser'};
172 die "Unable to read file '$file'\n" unless -r $file;
173 die "'$parser' is an invalid parser\n" unless $valid_parsers{ $parser };
175 my $t = SQL::Translator->new(parser_args => {
176 mysql_parser_version => $mysql_parser_version
180 $t->parser( $parser ) or die $tr->error;
181 my $out = $t->translate( $file ) or die $tr->error;
182 my $schema = $t->schema;
183 unless ( $schema->name ) {
184 $schema->name( $file );
190 my $result = SQL::Translator::Diff::schema_diff(
191 $source_schema, $source_db,
192 $target_schema, $target_db,
194 caseopt => $caseopt || 0,
195 ignore_index_names => $ignore_index_names || 0,
196 ignore_constraint_names => $ignore_constraint_names || 0,
197 ignore_view_sql => $ignore_view_sql || 0,
198 ignore_proc_sql => $ignore_proc_sql || 0,
199 output_db => $output_db,
200 no_batch_alters => $no_batch_alters || 0,
201 debug => $debug || 0,
202 trace => $trace || 0,
204 quote_table_names => $quote || '',
205 quote_field_names => $quote || '',
216 print "No differences found.";
219 # -------------------------------------------------------------------
220 # Bring out number weight & measure in a year of dearth.
222 # -------------------------------------------------------------------
228 Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>.
232 SQL::Translator, L<http://sqlfairy.sourceforge.net>.