… | |
… | |
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 | |
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 = '1.0'; |
50 | $VERSION = '2.0'; |
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( |
… | |
… | |
56 | ); |
57 | ); |
57 | |
58 | |
58 | bootstrap PApp::SQL $VERSION; |
59 | bootstrap PApp::SQL $VERSION; |
59 | } |
60 | } |
60 | |
61 | |
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62 | boot2 DBI::SQL_VARCHAR, DBI::SQL_INTEGER, DBI::SQL_DOUBLE; |
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|
63 | |
61 | our $sql_exec; # last result of sql_exec's execute call |
64 | our $sql_exec; # last result of sql_exec's execute call |
62 | our $DBH; # the default database handle |
65 | our $DBH; # the default database handle |
63 | our $Database; # the current SQL::Database object, if applicable |
66 | our $Database; # the current SQL::Database object, if applicable |
64 | |
67 | |
65 | our %dbcache; |
68 | our %dbcache; |
… | |
… | |
144 | |
147 | |
145 | # then connect anew |
148 | # then connect anew |
146 | $dbcache{$id} = |
149 | $dbcache{$id} = |
147 | eval { DBI->connect($dsn, $user, $pass, $flags) } |
150 | eval { DBI->connect($dsn, $user, $pass, $flags) } |
148 | || eval { DBI->connect($dsn, $user, $pass, $flags) } |
151 | || eval { DBI->connect($dsn, $user, $pass, $flags) } |
149 | || die "unable to connect to database $dsn: $DBI::errstr\n"; |
152 | || Carp::croak "unable to connect to database $dsn: $DBI::errstr\n"; |
150 | $connect->($dbcache{$id}) if $connect; |
153 | $connect->($dbcache{$id}) if $connect; |
151 | } |
154 | } |
152 | $dbcache{$id}; |
155 | $dbcache{$id}; |
153 | } |
156 | } |
154 | |
157 | |
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299 | |
302 | |
300 | mysql: first C<AUTO_INCREMENT> column set to NULL |
303 | mysql: first C<AUTO_INCREMENT> column set to NULL |
301 | postgres: C<oid> column (is there a way to get the last SERIAL?) |
304 | postgres: C<oid> column (is there a way to get the last SERIAL?) |
302 | sybase: C<IDENTITY> column of the last insert (slow) |
305 | sybase: C<IDENTITY> column of the last insert (slow) |
303 | informix: C<SERIAL> or C<SERIAL8> column of the last insert |
306 | informix: C<SERIAL> or C<SERIAL8> column of the last insert |
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307 | sqlite: C<last_insert_rowid()> |
304 | |
308 | |
305 | Except for sybase, this does not require a server access. |
309 | Except for sybase, this does not require a server access. |
306 | |
310 | |
307 | =cut |
311 | =cut |
308 | |
312 | |
309 | sub sql_insertid($) { |
313 | sub sql_insertid($) { |
310 | my $sth = shift or die "sql_insertid requires a statement handle"; |
314 | my $sth = shift or Carp::croak "sql_insertid requires a statement handle"; |
311 | my $dbh = $sth->{Database}; |
315 | my $dbh = $sth->{Database}; |
312 | my $driver = $dbh->{Driver}{Name}; |
316 | my $driver = $dbh->{Driver}{Name}; |
313 | |
317 | |
314 | $driver eq "mysql" and return $sth->{mysql_insertid}; |
318 | $driver eq "mysql" and return $sth->{mysql_insertid}; |
315 | $driver eq "Pg" and return $sth->{pg_oid_status}; |
319 | $driver eq "Pg" and return $sth->{pg_oid_status}; |
316 | $driver eq "Sybase" and return sql_fetch($dbh, 'SELECT @@IDENTITY'); |
320 | $driver eq "Sybase" and return sql_fetch ($dbh, 'SELECT @@IDENTITY'); |
317 | $driver eq "Informix" and return $sth->{ix_sqlerrd}[1]; |
321 | $driver eq "Informix" and return $sth->{ix_sqlerrd}[1]; |
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|
322 | $driver eq "SQLite" and return sql_fetch ($dbh, 'SELECT last_insert_rowid ()'); |
318 | |
323 | |
319 | die "sql_insertid does not spport the dbd driver '$driver', please see PApp::SQL::sql_insertid"; |
324 | Carp::croak "sql_insertid does not support the dbd driver '$driver', at"; |
320 | } |
325 | } |
321 | |
326 | |
322 | =item [old-size] = cachesize [new-size] |
327 | =item [old-size] = cachesize [new-size] |
323 | |
328 | |
324 | Returns (and possibly changes) the LRU cache size used by C<sql_exec>. The |
329 | Returns (and possibly changes) the LRU cache size used by C<sql_exec>. The |
… | |
… | |
356 | |
361 | |
357 | =cut |
362 | =cut |
358 | |
363 | |
359 | reinitialize; |
364 | reinitialize; |
360 | |
365 | |
|
|
366 | =head2 Type Deduction |
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367 | |
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368 | Since every database driver seems to deduce parameter types differently, |
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369 | usually wrongly, and at leats in the case of DBD::mysql, different in |
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370 | every other release or so, and this can and does lead to data corruption, |
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371 | this module does type deduction itself. |
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372 | |
|
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373 | What does it mean? Simple - sql parameters for placeholders will be |
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374 | explicitly marked as SQL_VARCHAR, SQL_INTEGER or SQL_DOUBLE the first time |
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375 | a statement is prepared. |
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376 | |
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377 | To force a specific type, you can either continue to use e.g. sql casts, |
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378 | or you can make sure to consistently use strings or numbers. To make a |
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379 | perl scalar look enough like a string or a number, use this when passing |
|
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380 | it to sql_exec or a similar functions: |
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381 | |
|
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382 | "$string" # to pass a string |
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383 | $num+0 # to pass a number |
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384 | |
|
|
385 | =cut |
|
|
386 | |
361 | package PApp::SQL::Database; |
387 | package PApp::SQL::Database; |
362 | |
388 | |
363 | =head2 The Database Class |
389 | =head2 The Database Class |
364 | |
390 | |
365 | Again (sigh) the problem of persistency. What do you do when you have |
391 | Again (sigh) the problem of persistency. What do you do when you have |
… | |
… | |
406 | |
432 | |
407 | sub checked_dbh($) { |
433 | sub checked_dbh($) { |
408 | my $dbh = $dbcache{$_[0][0]}; |
434 | my $dbh = $dbcache{$_[0][0]}; |
409 | $dbh && $dbh->ping |
435 | $dbh && $dbh->ping |
410 | ? $dbh |
436 | ? $dbh |
411 | : PApp::SQL::connect_cached((split /\x00/, $_[0][0]), $_[0][1], $_[0][2]); |
437 | : PApp::SQL::connect_cached((split /\x00/, $_[0][0], 4), $_[0][1], $_[0][2]); |
412 | } |
438 | } |
413 | |
439 | |
414 | =item $db->dsn |
440 | =item $db->dsn |
415 | |
441 | |
416 | Return the DSN (L<DBI>) fo the database object (e.g. for error messages). |
442 | Return the DSN (L<DBI>) fo the database object (e.g. for error messages). |