… | |
… | |
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%'" |
… | |
… | |
39 | |
39 | |
40 | =cut |
40 | =cut |
41 | |
41 | |
42 | package PApp::SQL; |
42 | package PApp::SQL; |
43 | |
43 | |
|
|
44 | use Carp (); |
44 | use DBI (); |
45 | use DBI (); |
45 | |
46 | |
46 | BEGIN { |
47 | BEGIN { |
47 | use base qw(Exporter DynaLoader); |
48 | use base qw(Exporter DynaLoader); |
48 | |
49 | |
49 | $VERSION = 0.142; |
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( |
… | |
… | |
62 | our $DBH; # the default database handle |
63 | our $DBH; # the default database handle |
63 | our $Database; # the current SQL::Database object, if applicable |
64 | our $Database; # the current SQL::Database object, if applicable |
64 | |
65 | |
65 | our %dbcache; |
66 | our %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 | |
… | |
… | |
88 | be nice as a placeholder for the database object that corresponds to |
89 | be 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 | |
… | |
… | |
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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186 | package-global (and exported) variable C<$sql_exec>. |
187 | package-global (and exported) variable C<$sql_exec>. |
187 | |
188 | |
188 | If any error occurs C<sql_exec> will throw an exception. |
189 | If any error occurs C<sql_exec> will throw an exception. |
189 | |
190 | |
190 | C<sql_uexec> is similar to C<sql_exec> but upgrades all input arguments to |
191 | C<sql_uexec> is similar to C<sql_exec> but upgrades all input arguments to |
191 | utf8 before calling the C<execute> method. |
192 | UTF-8 before calling the C<execute> method. |
192 | |
193 | |
193 | Examples: |
194 | Examples: |
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 = ?", $id; |
… | |
… | |
230 | my($name, $amount) = sql_fetch "select ...", args... |
231 | my($name, $amount) = sql_fetch "select ...", args... |
231 | |
232 | |
232 | ... and it's still quite fast unless you fetch large amounts of data. |
233 | ... and it's still quite fast unless you fetch large amounts of data. |
233 | |
234 | |
234 | C<sql_ufetch> is similar to C<sql_fetch> but upgrades all input values to |
235 | C<sql_ufetch> is similar to C<sql_fetch> but upgrades all input values to |
235 | utf8 and forces all result values to utf8 (this does I<not> include result |
236 | UTF-8 and forces all result values to UTF-8 (this does I<not> include result |
236 | parameters, only return values. Using bind variables in cinjunction with |
237 | parameters, only return values. Using bind variables in conjunction with |
237 | sql_u* functions results in undefined behaviour). |
238 | sql_u* functions might result in undefined behaviour - we use UTF-8 on |
|
|
239 | bind-variables at execution time and it seems to work on DBD::mysql as it |
|
|
240 | ignores the UTF-8 bit completely. Which just means that that DBD-driver is |
|
|
241 | broken). |
238 | |
242 | |
239 | =item sql_fetchall <see sql_exec> |
243 | =item sql_fetchall <see sql_exec> |
240 | |
244 | |
241 | =item sql_ufetchall <see sql_uexec> |
245 | =item sql_ufetchall <see sql_uexec> |
242 | |
246 | |
… | |
… | |
259 | for (sql_fetchall "select name, age, place from user") { |
263 | for (sql_fetchall "select name, age, place from user") { |
260 | my ($name, $age, $place) = @$_; |
264 | my ($name, $age, $place) = @$_; |
261 | } |
265 | } |
262 | |
266 | |
263 | C<sql_ufetchall> is similar to C<sql_fetchall> but upgrades all input |
267 | C<sql_ufetchall> is similar to C<sql_fetchall> but upgrades all input |
264 | values to utf8 and forces all result values to utf8 (see the caveats in |
268 | values to UTF-8 and forces all result values to UTF-8 (see the caveats in |
265 | the description of C<sql_ufetch>, though). |
269 | the 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> |
… | |
… | |
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 |
274 | with every database but can be quite slow, except on mysql, where this |
278 | with every database but can be quite slow, except on mysql, where this |
275 | should be quite fast. |
279 | should be quite fast. |
276 | |
280 | |
277 | C<sql_uexists> is similar to C<sql_exists> but upgrades all parameters to |
281 | C<sql_uexists> is similar to C<sql_exists> but upgrades all parameters to |
278 | utf8. |
282 | UTF-8. |
279 | |
283 | |
280 | Examples: |
284 | Examples: |
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; |
… | |
… | |
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 | |
302 | Except for sybase, this does not require a server access. |
307 | Except for sybase, this does not require a server access. |
303 | |
308 | |
304 | =cut |
309 | =cut |
305 | |
310 | |
306 | sub sql_insertid($) { |
311 | sub sql_insertid($) { |
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 | |
321 | Returns (and possibly changes) the LRU cache size used by C<sql_exec>. The |
327 | Returns (and possibly changes) the LRU cache size used by C<sql_exec>. The |
… | |
… | |
355 | |
361 | |
356 | reinitialize; |
362 | reinitialize; |
357 | |
363 | |
358 | package PApp::SQL::Database; |
364 | package PApp::SQL::Database; |
359 | |
365 | |
360 | =head2 THE DATABASE CLASS |
366 | =head2 The Database Class |
361 | |
367 | |
362 | Again (sigh) the problem of persistency. What do you do when you have |
368 | Again (sigh) the problem of persistency. What do you do when you have |
363 | to serialize on object that contains (or should contain) a database |
369 | to serialize on object that contains (or should contain) a database |
364 | handle? Short answer: you don't. Long answer: you can embed the necessary |
370 | handle? Short answer: you don't. Long answer: you can embed the necessary |
365 | information to recreate the dbh when needed. |
371 | information to recreate the dbh when needed. |
… | |
… | |
403 | |
409 | |
404 | sub checked_dbh($) { |
410 | sub checked_dbh($) { |
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 | |
413 | Return the DSN (L<DBI>) fo the database object (e.g. for error messages). |
419 | Return the DSN (L<DBI>) fo the database object (e.g. for error messages). |
… | |
… | |
447 | |
453 | |
448 | L<PApp>. |
454 | L<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 | |