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Comparing PApp-SQL/SQL.pm (file contents):
Revision 1.28 by root, Sat Nov 2 03:33:49 2002 UTC vs.
Revision 1.39 by root, Sun Jun 21 03:30:00 2009 UTC

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8 8
9 my $st = sql_exec $DBH, "select ... where a = ?", $a; 9 my $st = sql_exec $DBH, "select ... where a = ?", $a;
10 10
11 local $DBH = <database handle>; 11 local $DBH = <database handle>;
12 my $st = sql_exec \my($bind_a, $bind_b), "select a,b ..."; 12 my $st = sql_exec \my($bind_a, $bind_b), "select a,b ...";
13 my $st = sql_insertid 13 my $id = sql_insertid
14 sql_exec "insert into ... values (?, ?)", $v1, $v2; 14 sql_exec "insert into ... values (?, ?)", $v1, $v2;
15 my $a = sql_fetch "select a from ..."; 15 my $a = sql_fetch "select a from ...";
16 sql_fetch \my($a, $b), "select a,b ..."; 16 sql_fetch \my($a, $b), "select a,b ...";
17 17
18 sql_exists "table where name like 'a%'" 18 sql_exists "table where name like 'a%'"
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39 39
40=cut 40=cut
41 41
42package PApp::SQL; 42package PApp::SQL;
43 43
44use Carp ();
44use DBI (); 45use DBI ();
45 46
46BEGIN { 47BEGIN {
47 use base qw(Exporter DynaLoader); 48 use base qw(Exporter DynaLoader);
48 49
49 $VERSION = 0.141; 50 $VERSION = '1.05';
50 @EXPORT = qw( 51 @EXPORT = qw(
51 sql_exec sql_fetch sql_fetchall sql_exists sql_insertid $sql_exec 52 sql_exec sql_fetch sql_fetchall sql_exists sql_insertid $sql_exec
52 sql_uexec sql_ufetch sql_ufetchall sql_uexists 53 sql_uexec sql_ufetch sql_ufetchall sql_uexists
53 ); 54 );
54 @EXPORT_OK = qw( 55 @EXPORT_OK = qw(
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62our $DBH; # the default database handle 63our $DBH; # the default database handle
63our $Database; # the current SQL::Database object, if applicable 64our $Database; # the current SQL::Database object, if applicable
64 65
65our %dbcache; 66our %dbcache;
66 67
67=head2 GLOBAL VARIABLES 68=head2 Global Variables
68 69
69=over 4 70=over 4
70 71
71=item $sql_exec 72=item $sql_exec
72 73
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88be nice as a placeholder for the database object that corresponds to 89be nice as a placeholder for the database object that corresponds to
89$PApp::SQL::DBH. 90$PApp::SQL::DBH.
90 91
91=back 92=back
92 93
93=head2 FUNCTIONS 94=head2 Functions
94 95
95=over 4 96=over 4
96 97
97=item $dbh = connect_cached $id, $dsn, $user, $pass, $flags, $connect 98=item $dbh = connect_cached $id, $dsn, $user, $pass, $flags, $connect
98 99
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144 145
145 # then connect anew 146 # then connect anew
146 $dbcache{$id} = 147 $dbcache{$id} =
147 eval { DBI->connect($dsn, $user, $pass, $flags) } 148 eval { DBI->connect($dsn, $user, $pass, $flags) }
148 || eval { DBI->connect($dsn, $user, $pass, $flags) } 149 || eval { DBI->connect($dsn, $user, $pass, $flags) }
149 || die "unable to connect to database $dsn: $DBI::errstr\n"; 150 || Carp::croak "unable to connect to database $dsn: $DBI::errstr\n";
150 $connect->($dbcache{$id}) if $connect; 151 $connect->($dbcache{$id}) if $connect;
151 } 152 }
152 $dbcache{$id}; 153 $dbcache{$id};
153} 154}
154 155
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186package-global (and exported) variable C<$sql_exec>. 187package-global (and exported) variable C<$sql_exec>.
187 188
188If any error occurs C<sql_exec> will throw an exception. 189If any error occurs C<sql_exec> will throw an exception.
189 190
190C<sql_uexec> is similar to C<sql_exec> but upgrades all input arguments to 191C<sql_uexec> is similar to C<sql_exec> but upgrades all input arguments to
191utf8 before calling the C<execute> method. 192UTF-8 before calling the C<execute> method.
192 193
193Examples: 194Examples:
194 195
195 # easy one 196 # easy one
196 my $st = sql_exec "select name, id from table where id = ?", $id; 197 my $st = sql_exec "select name, id from table where id = ?", $id;
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230 my($name, $amount) = sql_fetch "select ...", args... 231 my($name, $amount) = sql_fetch "select ...", args...
231 232
232... and it's still quite fast unless you fetch large amounts of data. 233... and it's still quite fast unless you fetch large amounts of data.
233 234
234C<sql_ufetch> is similar to C<sql_fetch> but upgrades all input values to 235C<sql_ufetch> is similar to C<sql_fetch> but upgrades all input values to
235utf8 and forces all result values to utf8 (this does I<not> include result 236UTF-8 and forces all result values to UTF-8 (this does I<not> include result
236parameters, only return values. Using bind variables in cinjunction with 237parameters, only return values. Using bind variables in conjunction with
237sql_u* functions results in undefined behaviour). 238sql_u* functions might result in undefined behaviour - we use UTF-8 on
239bind-variables at execution time and it seems to work on DBD::mysql as it
240ignores the UTF-8 bit completely. Which just means that that DBD-driver is
241broken).
238 242
239=item sql_fetchall <see sql_exec> 243=item sql_fetchall <see sql_exec>
240 244
241=item sql_ufetchall <see sql_uexec> 245=item sql_ufetchall <see sql_uexec>
242 246
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259 for (sql_fetchall "select name, age, place from user") { 263 for (sql_fetchall "select name, age, place from user") {
260 my ($name, $age, $place) = @$_; 264 my ($name, $age, $place) = @$_;
261 } 265 }
262 266
263C<sql_ufetchall> is similar to C<sql_fetchall> but upgrades all input 267C<sql_ufetchall> is similar to C<sql_fetchall> but upgrades all input
264values to utf8 and forces all result values to utf8 (see the caveats in 268values to UTF-8 and forces all result values to UTF-8 (see the caveats in
265the description of C<sql_ufetch>, though). 269the description of C<sql_ufetch>, though).
266 270
267=item sql_exists "<table_references> where <where_condition>...", args... 271=item sql_exists "<table_references> where <where_condition>...", args...
268 272
269=item sql_uexists <see sql_exists> 273=item sql_uexists <see sql_exists>
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273"select * from" were prepended to your statement (it isn't)). Should work 277"select * from" were prepended to your statement (it isn't)). Should work
274with every database but can be quite slow, except on mysql, where this 278with every database but can be quite slow, except on mysql, where this
275should be quite fast. 279should be quite fast.
276 280
277C<sql_uexists> is similar to C<sql_exists> but upgrades all parameters to 281C<sql_uexists> is similar to C<sql_exists> but upgrades all parameters to
278utf8. 282UTF-8.
279 283
280Examples: 284Examples:
281 285
282 print "user 7 exists!\n" 286 print "user 7 exists!\n"
283 if sql_exists "user where id = ?", 7; 287 if sql_exists "user where id = ?", 7;
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296 300
297 mysql: first C<AUTO_INCREMENT> column set to NULL 301 mysql: first C<AUTO_INCREMENT> column set to NULL
298 postgres: C<oid> column (is there a way to get the last SERIAL?) 302 postgres: C<oid> column (is there a way to get the last SERIAL?)
299 sybase: C<IDENTITY> column of the last insert (slow) 303 sybase: C<IDENTITY> column of the last insert (slow)
300 informix: C<SERIAL> or C<SERIAL8> column of the last insert 304 informix: C<SERIAL> or C<SERIAL8> column of the last insert
305 sqlite: C<last_insert_rowid()>
301 306
302Except for sybase, this does not require a server access. 307Except for sybase, this does not require a server access.
303 308
304=cut 309=cut
305 310
306sub sql_insertid($) { 311sub sql_insertid($) {
307 my $sth = shift or die "sql_insertid requires a statement handle"; 312 my $sth = shift or Carp::croak "sql_insertid requires a statement handle";
308 my $dbh = $sth->{Database}; 313 my $dbh = $sth->{Database};
309 my $driver = $dbh->{Driver}{Name}; 314 my $driver = $dbh->{Driver}{Name};
310 315
311 $driver eq "mysql" and return $sth->{mysql_insertid}; 316 $driver eq "mysql" and return $sth->{mysql_insertid};
312 $driver eq "Pg" and return $sth->{pg_oid_status}; 317 $driver eq "Pg" and return $sth->{pg_oid_status};
313 $driver eq "Sybase" and return sql_fetch($dbh, 'SELECT @@IDENTITY'); 318 $driver eq "Sybase" and return sql_fetch ($dbh, 'SELECT @@IDENTITY');
314 $driver eq "Informix" and return $sth->{ix_sqlerrd}[1]; 319 $driver eq "Informix" and return $sth->{ix_sqlerrd}[1];
320 $driver eq "SQLite" and return sql_fetch ($dbh, 'SELECT last_insert_rowid ()');
315 321
316 die "sql_insertid does not spport the dbd driver '$driver', please see PApp::SQL::sql_insertid"; 322 Carp::croak "sql_insertid does not support the dbd driver '$driver', at";
317} 323}
318 324
319=item [old-size] = cachesize [new-size] 325=item [old-size] = cachesize [new-size]
320 326
321Returns (and possibly changes) the LRU cache size used by C<sql_exec>. The 327Returns (and possibly changes) the LRU cache size used by C<sql_exec>. The
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355 361
356reinitialize; 362reinitialize;
357 363
358package PApp::SQL::Database; 364package PApp::SQL::Database;
359 365
360=head2 THE DATABASE CLASS 366=head2 The Database Class
361 367
362Again (sigh) the problem of persistency. What do you do when you have 368Again (sigh) the problem of persistency. What do you do when you have
363to serialize on object that contains (or should contain) a database 369to serialize on object that contains (or should contain) a database
364handle? Short answer: you don't. Long answer: you can embed the necessary 370handle? Short answer: you don't. Long answer: you can embed the necessary
365information to recreate the dbh when needed. 371information to recreate the dbh when needed.
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403 409
404sub checked_dbh($) { 410sub checked_dbh($) {
405 my $dbh = $dbcache{$_[0][0]}; 411 my $dbh = $dbcache{$_[0][0]};
406 $dbh && $dbh->ping 412 $dbh && $dbh->ping
407 ? $dbh 413 ? $dbh
408 : PApp::SQL::connect_cached((split /\x00/, $_[0][0]), $_[0][1], $_[0][2]); 414 : PApp::SQL::connect_cached((split /\x00/, $_[0][0], 4), $_[0][1], $_[0][2]);
409} 415}
410 416
411=item $db->dsn 417=item $db->dsn
412 418
413Return the DSN (L<DBI>) fo the database object (e.g. for error messages). 419Return the DSN (L<DBI>) fo the database object (e.g. for error messages).
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447 453
448L<PApp>. 454L<PApp>.
449 455
450=head1 AUTHOR 456=head1 AUTHOR
451 457
452 Marc Lehmann <pcg@goof.com> 458 Marc Lehmann <schmorp@schmorp.de>
453 http://www.goof.com/pcg/marc/ 459 http://home.schmorp.de/
454 460
455=cut 461=cut
456 462

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