/[pgdiff]/pgdiff
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Revision 1.10 - (show annotations)
Sun Oct 26 19:22:36 2003 UTC (19 years, 3 months ago) by dpavlin
Branch: MAIN
Changes since 1.9: +1 -1 lines
fix typo in --table[s] usage

1 #!/usr/bin/perl -w
2
3 # Compare data in two different databases
4 #
5 # 2003-08-07 Dobrica Pavlinusic
6 #
7 # somewhat based on ides from
8 # DataDiff 0.1 by Jon D. Frisby, http://www.mrjoy.com
9
10 use strict;
11 use Getopt::Long;
12 use DBI;
13 use Data::Dumper;
14 use Pg::Scheme;
15
16 $| = 1;
17
18 my ($debug,$verbose) = (0,0);
19 my ($help,$masterhost,$masterport,$masteruser,$masterpassword,
20 $slavehost,$slaveport,$slaveuser,$slavepassword,
21 $masterfile,
22 $slavefile,
23 );
24 my $tables;
25
26 my $result = GetOptions(
27 "debug!" => \$debug, "verbose!" => \$verbose, "help" => \$help,
28 "masterhost=s" => \$masterhost, "masterport=i" => \$masterport,
29 "masteruser=s" => \$masteruser, "masterpassword=s" => \$masterpassword,
30 "masterfile=s" => \$masterfile,
31 "slavehost=s" => \$slavehost, "slaveport=i" => \$slaveport,
32 "slaveuser=s" => \$slaveuser, "slavepassword=s" => \$slavepassword,
33 "slavefile=s" => \$slavefile,
34 "tables=s" => \$tables,
35 );
36
37 if (defined($help) || (scalar(@ARGV) < 2)) {
38 print "Usage: $0 [options] masterdb slavedb
39 Options:
40 --masterhost=hostname --masterport=port
41 --masteruser=username --masterpassword=string
42 --masterfile=filename
43 --slavehost=hostname --slaveport=port
44 --slaveuser=username --slavepassword=string
45 --slavefile=filename
46 --table[s]=table[,table...]
47 ";
48 # exit ((scalar(@ARGV) < 2)? 1:0);
49 exit;
50 }
51
52 my $master = $ARGV[0] || "master";
53 my $slave = $ARGV[1] || "slave";
54
55 my $minfo = "dbname=$master";
56 $minfo = "$minfo host=$masterhost" if (defined($masterhost));
57 $minfo = "$minfo port=$masterport" if (defined($masterport));
58
59 my $sinfo = "dbname=$slave";
60 $sinfo = "$sinfo host=$slavehost" if (defined($slavehost));
61 $sinfo = "$sinfo port=$slaveport" if (defined($slaveport));
62
63 print "Master connection is $minfo\n" if ($debug);
64 print "Slave connection is $sinfo\n" if ($debug);
65
66 my $mdbh = DBI->connect("DBI:Pg:$minfo", $masteruser, $masterpassword, { PrintError => 0 } );
67 if (! $mdbh) {
68 print "Can't connect to master database $master";
69 print "on $masterhost" if ($masterhost);
70 print "\n";
71 exit 1;
72 }
73 my $sdbh = DBI->connect("DBI:Pg:$sinfo", $slaveuser, $slavepassword, { PrintError => 0 });
74 if (! $sdbh) {
75 print "Can't connect to slave database $slave";
76 print "on $slavehost" if ($slavehost);
77 print "\n";
78 exit 1;
79 }
80
81 my ($diff_shema,$diff_data) = (0,0);
82
83 my $sql;
84
85 sub debug_sql {
86 return if (! $debug);
87 my $sql = shift;
88 $sql =~ s/[\n\r]/ /gs;
89 $sql =~ s/\s\s+/ /g;
90 print STDERR "DEBUG: SQL: $sql\n";
91 }
92
93 sub debug_row {
94 return if (! $debug);
95 my $row = shift;
96 my @cols = @_;
97 if (! $row) {
98 print STDERR "DEBUG: ROW data is undef!\n";
99 return;
100 }
101 print STDERR "DEBUG: ROW: [",$#cols+1,"] ";
102 foreach my $col (@cols) {
103 print STDERR "$col:";
104 if ($row->{$col}) {
105 print $row->{$col};
106 } else {
107 print "null";
108 }
109 print " ";
110 }
111 print STDERR "\n";
112 }
113
114 sub debug {
115 return if (!$debug);
116 print STDERR "DEBUG: ",@_;
117 }
118
119 $verbose = 1 if ($debug);
120
121 # init object for scheme in master database
122 my $mscheme = new Pg::Scheme( 'dbh' => $mdbh, 'DEBUG' => 0 ) || die "can't query master schema";
123 my $sscheme = new Pg::Scheme( 'dbh' => $sdbh, 'DEBUG' => 0 ) || die "can't query slave schema";
124
125 # which tables to compare?
126
127 my @tables = $mscheme->list_tables($tables);
128
129 debug "Comparing tables: ".join(", ",@tables)."\n";
130
131 # start transaction
132 print "begin work;\n";
133
134 # disable active triggers on slave database
135 my @triggers = $sscheme->get_triggers();
136
137 foreach my $tr (@triggers) {
138 print "update pg_trigger set tgenabled = false where tgname='$tr';\n";
139 }
140
141 my $cols;
142 my $diff_total = 0;
143
144 foreach my $table (@tables) {
145
146 my $sth;
147
148 # diff schema
149
150 # all colums (for insert)
151 my @cols = @{$mscheme->cols($table)};
152
153 # colums compared by a=b
154 my @cols_notnull = @{$mscheme->cols_notnull($table)};
155
156 # colums compared by a=b or a is null and b is null
157 my @cols_null = @{$mscheme->cols_null($table)};
158
159 # primary key columns
160 my @cols_pk = @{$mscheme->cols_pk($table)};
161
162 # columns to compare (not in primary key)
163 my @cols_cmp = @{$mscheme->cols_notpk($table)};
164
165 my @cols_skip; # skipped columns
166 my @cols_test; # all colums to test (without skipped)
167
168 foreach my $row (@{$mscheme->pg_attribute($table)}) {
169 # attname | format_type | attnotnull | atthasdef | attnum
170
171 # FIXME: do something with attributes which shouldn't be compared
172 # (date, time, datetime, timestamp)
173 if ($row->{format_type} =~ /(date)|(time)/i) {
174 push @cols_skip,$row->{attname};
175 } else {
176 push @cols_test,$row->{attname};
177 }
178
179 }
180
181 if ($debug) {
182 print STDERR "DEBUG: table $table not null cols: (",join(", ",@cols_notnull),")";
183 print STDERR " - null cols: (",join(", ",@cols_null),")" if (@cols_null);
184 print STDERR " - skip cols: (",join(", ",@cols_skip),")" if (@cols_skip);
185 print STDERR "\n";
186 }
187
188 # diff data
189
190 if (! @cols_pk) {
191 print STDERR "can't find PK rows for table '$table' using all\n";
192 @cols_pk = @cols;
193 }
194
195
196 if ($verbose) {
197 print "table '$table' using for key: (",join(", ",@cols_pk),") to compare cols: (",join(", ",@cols_cmp),")\n";
198 }
199
200 # diff data
201
202 my $msql = "select ".join(",",@cols)." from $table";
203 my $ssql = $msql;
204
205 sub sql_where {
206 my @cols = @_;
207 my $and = "";
208 my $where = " where ";
209 foreach my $col (@cols) {
210 $where .= "$and$col=?";
211 $and = " and ";
212 }
213 return $where;
214 }
215
216 sub sql_order {
217 my @cols = @_;
218 my $order = " order by ";
219 my $comma = "";
220 foreach my $col (@cols) {
221 $order .= "$comma$col asc";
222 $comma = ", ";
223 }
224 return $order;
225 }
226
227 my $order = sql_order(@cols_pk);
228 $msql .= $order;
229 $ssql .= $order;
230
231 debug_sql($msql);
232
233 my $msth = $mdbh->prepare($msql) || die $mdbh->errstr;
234 $msth->execute() || die $msth->errstr;
235
236 my $ssth = $sdbh->prepare($ssql) || die $sdbh->errstr;
237 $ssth->execute() || die $ssth->errstr;
238
239 my $diff_row = 0;
240
241 my ($mrow,$srow);
242 # have_*
243 use constant NO_ROW => 0;
244 use constant FETCH_ROW => 1;
245 use constant HAVE_ROW => 2;
246 my ($have_mrow,$have_srow) = (FETCH_ROW,FETCH_ROW);
247
248 while ($have_mrow != NO_ROW || $have_srow != NO_ROW) {
249
250 debug "have mrow: $have_mrow srow: $have_srow\n";
251
252 sub pk_val {
253 my $row = shift || die "need row";
254 my @cols = shift || die "need cols";
255 my @val;
256 foreach my $col (@cols) {
257 push @val,$row->{$col};
258 }
259 return @val;
260 }
261
262 # fetch row from master
263 if ($have_mrow == FETCH_ROW) {
264 debug "fetch row from master: $msql\n";
265 $mrow = $msth->fetchrow_hashref();
266 debug_row($mrow,@cols);
267
268 if ($mrow) {
269 # fill-in primary key values
270 $have_mrow = HAVE_ROW;
271 } else {
272 $have_mrow = NO_ROW;
273 }
274 }
275
276 # fetch row from slave
277 if ($have_srow == FETCH_ROW) {
278 debug "fetch row from slave: $ssql\n";
279 $srow = $ssth->fetchrow_hashref();
280 debug_row($srow,@cols);
281 if ($srow) {
282 $have_srow = HAVE_ROW;
283 } else {
284 $have_srow = NO_ROW;
285 }
286 }
287
288 debug "have mrow: $have_mrow srow: $have_srow\n";
289
290 # insert into slave database
291 sub sql_insert {
292 my $dbh = shift @_ || die "need dbh";
293 my $table = shift @_ || die "need table as argument";
294 my $row = shift @_ || die "need row data";
295 my @cols = @_;
296
297 my $sql = "insert into $table (".join(",",@cols).") values (";
298 my $comma = "";
299 foreach my $col (@cols) {
300 $sql .= $comma.$dbh->quote($row->{$col});
301 $comma = ",";
302 }
303 $sql.=")";
304 debug_sql($sql);
305 return $sql;
306 }
307
308 # delete from slave database
309 sub sql_delete {
310 my $dbh = shift @_ || die "need dbh";
311 my $table = shift @_ || die "need table as argument";
312 my $row = shift @_ || die "need row as argument";
313 my @cols_pk = @_;
314
315 my $where = sql_where(@cols_pk);
316
317 my $sql = "delete from $table";
318 foreach my $col (@cols_pk) {
319 my $val = $dbh->quote($row->{$col}) || die "can't find value in row for col $col";
320 $where =~ s/\?/$val/;
321 }
322 $sql .= $where;
323 debug_sql($sql);
324 return $sql;
325 }
326
327 # update row in slave database
328 sub sql_update {
329 my $dbh = shift @_ || die "need dbh";
330 my $table = shift @_ || die "need table as argument";
331 my $col = shift @_ || die "need col to update";
332 my $row = shift @_ || die "need row";
333 my @cols_pk = @_;
334
335 my $sql = "update $table set $col=".$dbh->quote($row->{$col});
336 my $where = sql_where(@cols_pk);
337 foreach my $col (@cols_pk) {
338 my $val = $dbh->quote($row->{$col}) || die "can't find value in row for col $col";
339 $where =~ s/\?/$val/;
340 }
341 $sql .= $where;
342 debug_sql($sql);
343 return $sql;
344 }
345 # master slave
346 # 1 = 1 test
347 # 1 < 2 insert mrow
348 # 2 > 1 delete srow
349 # 1 = undef insert mrow
350 # undef = 1 delete srow
351
352 my $pk_same = 1;
353
354 # check key cols for row
355 foreach my $col (@cols_pk) {
356 if ( ($have_mrow == NO_ROW && $have_srow == HAVE_ROW) ||
357 ($have_mrow == HAVE_ROW && $have_srow == HAVE_ROW && $mrow->{$col} gt $srow->{$col}) ) {
358 $diff_row++;
359 $pk_same = 0;
360 print STDERR "EXTRA row in table '$table' pk: [".join(",",@cols_pk)."] value (".join(",",pk_val($srow,@cols_pk)).")\n" if ($verbose);
361 print sql_delete($sdbh,$table,$srow,@cols_pk),";\n";
362 $have_srow = FETCH_ROW;
363 last;
364 } elsif ( ($have_mrow == HAVE_ROW && $have_srow == NO_ROW) ||
365 ($have_mrow == HAVE_ROW && $have_srow == HAVE_ROW && $mrow->{$col} lt $srow->{$col}) ) {
366 $diff_row++;
367 $pk_same = 0;
368 print STDERR "MISSING row in table '$table' pk: [".join(",",@cols_pk)."] value (".join(",",pk_val($mrow,@cols_pk)).")\n" if ($verbose);
369 print sql_insert($mdbh,$table,$mrow,@cols),";\n";
370 $have_mrow = FETCH_ROW;
371 last;
372 }
373 }
374
375 if ($pk_same && $have_mrow == HAVE_ROW && $have_srow == HAVE_ROW) {
376 # check non-key cols for row
377 foreach my $col (@cols_cmp) {
378 if ($mrow->{$col} ne $srow->{$col}) {
379 $diff_row++;
380 print STDERR "DIFF in table '$table' row ($col): [".join(",",@cols_pk)."] '$mrow->{$col}' != '$srow->{$col}'\n" if ($verbose);
381 print sql_update($mdbh,$table,$col,$mrow,@cols_pk),";\n";
382 }
383 }
384 $have_mrow = FETCH_ROW;
385 $have_srow = FETCH_ROW;
386 }
387 }
388
389 print STDERR "$diff_row differences in table $table\n" if ($verbose && $diff_row > 0);
390 $diff_total += $diff_row;
391 }
392
393 if ($verbose) {
394 if ($diff_total == 0) {
395 print STDERR "databases are same";
396 } elsif ($diff_total > 0) {
397 print STDERR "$diff_total differences in all tables\n";
398 } else {
399 die "this shouldn't happend. please report a bug!";
400 }
401 }
402
403 # enable triggers again on slave
404 foreach my $tr (@triggers) {
405 print "update pg_trigger set tgenabled = true where tgname='$tr';\n";
406 }
407 # end transaction
408 print "commit;\n";
409
410 $mdbh->disconnect();
411 $sdbh->disconnect();

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