/[pgdiff]/pgdiff
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Revision 1.7 - (show annotations)
Fri Aug 15 22:06:19 2003 UTC (19 years, 5 months ago) by dpavlin
Branch: MAIN
Changes since 1.6: +14 -2 lines
print friendly error messages if can't connect to database(s)

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 --tables[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 schema";
123
124 # which tables to compare?
125
126 my @tables = $mscheme->list_tables($tables);
127
128 debug "Comparing tables: ".join(", ",@tables)."\n";
129
130 my $cols;
131 my $diff_total = 0;
132
133 foreach my $table (@tables) {
134
135 my $sth;
136
137 # diff schema
138
139 # all colums (for insert)
140 my @cols = @{$mscheme->cols($table)};
141
142 # colums compared by a=b
143 my @cols_notnull = @{$mscheme->cols_notnull($table)};
144
145 # colums compared by a=b or a is null and b is null
146 my @cols_null = @{$mscheme->cols_null($table)};
147
148 # primary key columns
149 my @cols_pk = @{$mscheme->cols_pk($table)};
150
151 # columns to compare (not in primary key)
152 my @cols_cmp = @{$mscheme->cols_notpk($table)};
153
154 my @cols_skip; # skipped columns
155 my @cols_test; # all colums to test (without skipped)
156
157 foreach my $row (@{$mscheme->pg_attribute($table)}) {
158 # attname | format_type | attnotnull | atthasdef | attnum
159
160 # FIXME: do something with attributes which shouldn't be compared
161 # (date, time, datetime, timestamp)
162 if ($row->{format_type} =~ /(date)|(time)/i) {
163 push @cols_skip,$row->{attname};
164 } else {
165 push @cols_test,$row->{attname};
166 }
167
168 }
169
170 if ($debug) {
171 print STDERR "DEBUG: table $table not null cols: (",join(", ",@cols_notnull),")";
172 print STDERR " - null cols: (",join(", ",@cols_null),")" if (@cols_null);
173 print STDERR " - skip cols: (",join(", ",@cols_skip),")" if (@cols_skip);
174 print STDERR "\n";
175 }
176
177 # diff data
178
179 if (! @cols_pk) {
180 print STDERR "can't find PK rows for table '$table' using all\n";
181 @cols_pk = @cols;
182 }
183
184
185 if ($verbose) {
186 print "table '$table' using for key: (",join(", ",@cols_pk),") to compare cols: (",join(", ",@cols_cmp),")\n";
187 }
188
189 # diff data
190
191 my $msql = "select ".join(",",@cols)." from $table";
192 my $ssql = $msql;
193
194 sub sql_where {
195 my @cols = @_;
196 my $and = "";
197 my $where = " where ";
198 foreach my $col (@cols) {
199 $where .= "$and$col=?";
200 $and = " and ";
201 }
202 return $where;
203 }
204
205 sub sql_order {
206 my @cols = @_;
207 my $order = " order by ";
208 my $comma = "";
209 foreach my $col (@cols) {
210 $order .= "$comma$col asc";
211 $comma = ", ";
212 }
213 return $order;
214 }
215
216 my $order = sql_order(@cols_pk);
217 $msql .= $order;
218 $ssql .= $order;
219
220 debug_sql($msql);
221
222 my $msth = $mdbh->prepare($msql) || die;
223 $msth->execute() || die;
224
225 my $ssth = $sdbh->prepare($ssql) || die;
226 $ssth->execute() || die;
227
228 my $diff_row = 0;
229
230 my ($mrow,$srow);
231 # have_*
232 use constant NO_ROW => 0;
233 use constant FETCH_ROW => 1;
234 use constant HAVE_ROW => 2;
235 my ($have_mrow,$have_srow) = (FETCH_ROW,FETCH_ROW);
236
237 while ($have_mrow != NO_ROW || $have_srow != NO_ROW) {
238
239 debug "have mrow: $have_mrow srow: $have_srow\n";
240
241 sub pk_val {
242 my $row = shift || die "need row";
243 my @cols = shift || die "need cols";
244 my @val;
245 foreach my $col (@cols) {
246 push @val,$row->{$col};
247 }
248 return @val;
249 }
250
251 # fetch row from master
252 if ($have_mrow == FETCH_ROW) {
253 debug "fetch row from master: $msql\n";
254 $mrow = $msth->fetchrow_hashref();
255 debug_row($mrow,@cols);
256
257 if ($mrow) {
258 # fill-in primary key values
259 $have_mrow = HAVE_ROW;
260 } else {
261 $have_mrow = NO_ROW;
262 }
263 }
264
265 # fetch row from slave
266 if ($have_srow == FETCH_ROW) {
267 debug "fetch row from slave: $ssql\n";
268 $srow = $ssth->fetchrow_hashref();
269 debug_row($srow,@cols);
270 if ($srow) {
271 $have_srow = HAVE_ROW;
272 } else {
273 $have_srow = NO_ROW;
274 }
275 }
276
277 debug "have mrow: $have_mrow srow: $have_srow\n";
278
279 # insert into slave database
280 sub sql_insert {
281 my $dbh = shift @_ || die "need dbh";
282 my $table = shift @_ || die "need table as argument";
283 my $row = shift @_ || die "need row data";
284 my @cols = @_;
285
286 my $sql = "insert into $table (".join(",",@cols).") values (";
287 my $comma = "";
288 foreach my $col (@cols) {
289 $sql .= $comma.$dbh->quote($row->{$col});
290 $comma = ",";
291 }
292 $sql.=")";
293 debug_sql($sql);
294 return $sql;
295 }
296
297 # delete from slave database
298 sub sql_delete {
299 my $dbh = shift @_ || die "need dbh";
300 my $table = shift @_ || die "need table as argument";
301 my $row = shift @_ || die "need row as argument";
302 my @cols_pk = @_;
303
304 my $where = sql_where(@cols_pk);
305
306 my $sql = "delete from $table";
307 foreach my $col (@cols_pk) {
308 my $val = $dbh->quote($row->{$col}) || die "can't find value in row for col $col";
309 $where =~ s/\?/$val/;
310 }
311 $sql .= $where;
312 debug_sql($sql);
313 return $sql;
314 }
315
316 # update row in slave database
317 sub sql_update {
318 my $dbh = shift @_ || die "need dbh";
319 my $table = shift @_ || die "need table as argument";
320 my $col = shift @_ || die "need col to update";
321 my $row = shift @_ || die "need row";
322 my @cols_pk = @_;
323
324 my $sql = "update $table set $col=".$dbh->quote($row->{$col});
325 my $where = sql_where(@cols_pk);
326 foreach my $col (@cols_pk) {
327 my $val = $dbh->quote($row->{$col}) || die "can't find value in row for col $col";
328 $where =~ s/\?/$val/;
329 }
330 $sql .= $where;
331 debug_sql($sql);
332 return $sql;
333 }
334 # master slave
335 # 1 = 1 test
336 # 1 < 2 insert mrow
337 # 2 > 1 delete srow
338 # 1 = undef insert mrow
339 # undef = 1 delete srow
340
341 my $pk_same = 1;
342
343 # check key cols for row
344 foreach my $col (@cols_pk) {
345 if ( ($have_mrow == NO_ROW && $have_srow == HAVE_ROW) ||
346 ($have_mrow == HAVE_ROW && $have_srow == HAVE_ROW && $mrow->{$col} gt $srow->{$col}) ) {
347 $diff_row++;
348 $pk_same = 0;
349 print STDERR "EXTRA row in table '$table' pk: [".join(",",@cols_pk)."] value (".join(",",pk_val($srow,@cols_pk)).")\n" if ($verbose);
350 print sql_delete($sdbh,$table,$srow,@cols_pk),";\n";
351 $have_srow = FETCH_ROW;
352 last;
353 } elsif ( ($have_mrow == HAVE_ROW && $have_srow == NO_ROW) ||
354 ($have_mrow == HAVE_ROW && $have_srow == HAVE_ROW && $mrow->{$col} lt $srow->{$col}) ) {
355 $diff_row++;
356 $pk_same = 0;
357 print STDERR "MISSING row in table '$table' pk: [".join(",",@cols_pk)."] value (".join(",",pk_val($mrow,@cols_pk)).")\n" if ($verbose);
358 print sql_insert($mdbh,$table,$mrow,@cols),";\n";
359 $have_mrow = FETCH_ROW;
360 last;
361 }
362 }
363
364 if ($pk_same && $have_mrow == HAVE_ROW && $have_srow == HAVE_ROW) {
365 # check non-key cols for row
366 foreach my $col (@cols_cmp) {
367 if ($mrow->{$col} ne $srow->{$col}) {
368 $diff_row++;
369 print STDERR "DIFF in table '$table' row ($col): [".join(",",@cols_pk)."] '$mrow->{$col}' != '$srow->{$col}'\n" if ($verbose);
370 print sql_update($mdbh,$table,$col,$mrow,@cols_pk),";\n";
371 }
372 }
373 $have_mrow = FETCH_ROW;
374 $have_srow = FETCH_ROW;
375 }
376 }
377
378 print STDERR "$diff_row differences in table $table\n" if ($verbose && $diff_row > 0);
379 $diff_total += $diff_row;
380 }
381
382 if ($verbose) {
383 if ($diff_total == 0) {
384 print STDERR "databases are same";
385 } elsif ($diff_total > 0) {
386 print STDERR "$diff_total differences in all tables\n";
387 } else {
388 die "this shouldn't happend. please report a bug!";
389 }
390 }
391
392 $mdbh->disconnect();
393 $sdbh->disconnect();

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