1 | =head1 NAME |
1 | =head1 NAME |
2 | |
2 | |
3 | PApp::SQL - absolutely easy yet fast and powerful sql access |
3 | PApp::SQL - absolutely easy yet fast and powerful sql access. |
4 | |
4 | |
5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
6 | |
6 | |
7 | use PApp::SQL; |
7 | use PApp::SQL; |
8 | |
8 | |
… | |
… | |
13 | my $st = sql_insertid |
13 | my $st = 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 "name from table where name like 'a%'" |
18 | sql_exists "table where name like 'a%'" |
19 | or die "a* required but not existent"; |
19 | or die "a* required but not existent"; |
20 | |
20 | |
21 | my $db = new PApp::SQL::Database "", "DBI:mysql:test", "user", "pass"; |
21 | my $db = new PApp::SQL::Database "", "DBI:mysql:test", "user", "pass"; |
22 | local $PApp::SQL::DBH = $db->checked_dbh; # does 'ping' |
22 | local $PApp::SQL::DBH = $db->checked_dbh; # does 'ping' |
23 | |
23 | |
… | |
… | |
44 | use DBI (); |
44 | use DBI (); |
45 | |
45 | |
46 | BEGIN { |
46 | BEGIN { |
47 | use base qw(Exporter DynaLoader); |
47 | use base qw(Exporter DynaLoader); |
48 | |
48 | |
49 | $VERSION = 0.123; |
49 | $VERSION = 0.13; |
50 | @EXPORT = qw( |
50 | @EXPORT = qw( |
51 | sql_exec sql_fetch sql_fetchall sql_exists sql_insertid $sql_exec |
51 | sql_exec sql_fetch sql_fetchall sql_exists sql_insertid $sql_exec |
52 | sql_ufetch sql_ufetchall sql_uexists |
52 | sql_uexec sql_ufetch sql_ufetchall sql_uexists |
53 | ); |
53 | ); |
54 | @EXPORT_OK = qw( |
54 | @EXPORT_OK = qw( |
55 | connect_cached |
55 | connect_cached |
56 | ); |
56 | ); |
57 | |
57 | |
… | |
… | |
69 | =over 4 |
69 | =over 4 |
70 | |
70 | |
71 | =item $sql_exec |
71 | =item $sql_exec |
72 | |
72 | |
73 | Since the C<sql_exec> family of functions return a statement handle there |
73 | Since the C<sql_exec> family of functions return a statement handle there |
74 | must eb another way to test the return value of the C<execute> call. This |
74 | must be another way to test the return value of the C<execute> call. This |
75 | global variable contains the result of the most recent call to C<execute> |
75 | global variable contains the result of the most recent call to C<execute> |
76 | done by this module. |
76 | done by this module. |
77 | |
77 | |
78 | =item $PApp::SQL::DBH |
78 | =item $PApp::SQL::DBH |
79 | |
79 | |
… | |
… | |
111 | __LINE__ work fine as well). |
111 | __LINE__ work fine as well). |
112 | |
112 | |
113 | The reason C<$id> is necessary is that you might specify special connect |
113 | The reason C<$id> is necessary is that you might specify special connect |
114 | arguments or special flags, or you might want to configure your $DBH |
114 | arguments or special flags, or you might want to configure your $DBH |
115 | differently than maybe other applications requesting the same database |
115 | differently than maybe other applications requesting the same database |
116 | connection. If none of this is becessary for your application you can |
116 | connection. If none of this is necessary for your application you can |
117 | leave $id empty (i.e. ""). |
117 | leave C<$id> empty (i.e. ""). |
118 | |
118 | |
119 | If specified, C<$connect> is a callback (e.g. a coderef) that will be |
119 | If specified, C<$connect> is a callback (e.g. a coderef) that will be |
120 | called each time a new connection is being established, with the new |
120 | called each time a new connection is being established, with the new |
121 | C<$dbh> as first argument. |
121 | C<$dbh> as first argument. |
122 | |
122 | |
123 | Examples: |
123 | Examples: |
124 | |
124 | |
125 | # try your luck opening the papp database without access info |
125 | # try your luck opening the papp database without access info |
126 | $dbh = connect_cached __FILE__, "DBI:mysql:papp"; |
126 | $dbh = connect_cached __FILE__, "DBI:mysql:papp"; |
|
|
127 | |
|
|
128 | Mysql-specific behaviour: The default setting of |
|
|
129 | C<mysql_client_found_rows> is TRUE, you can overwrite this, though. |
127 | |
130 | |
128 | =cut |
131 | =cut |
129 | |
132 | |
130 | sub connect_cached { |
133 | sub connect_cached { |
131 | my ($id, $dsn, $user, $pass, $flags, $connect) = @_; |
134 | my ($id, $dsn, $user, $pass, $flags, $connect) = @_; |
132 | # the following line is duplicated in PApp::SQL::Database::new |
135 | # the following line is duplicated in PApp::SQL::Database::new |
133 | $id = "$id\0$dsn\0$user\0$pass"; |
136 | $id = "$id\0$dsn\0$user\0$pass"; |
134 | unless ($dbcache{$id} && $dbcache{$id}->ping) { |
137 | unless ($dbcache{$id} && $dbcache{$id}->ping) { |
135 | #warn "connecting to ($dsn|$user|$pass|$flags)\n";#d# |
|
|
136 | # first, nuke our statement cache (sooory ;) |
138 | # first, nuke our statement cache (sooory ;) |
137 | cachesize cachesize 0; |
139 | cachesize cachesize 0; |
|
|
140 | |
|
|
141 | # then make mysql behave more standardly by default |
|
|
142 | $dsn =~ /^[Dd][Bb][Ii]:mysql:/ |
|
|
143 | and $dsn !~ /;mysql_client_found_rows/ |
|
|
144 | and $dsn .= ";mysql_client_found_rows=1"; |
|
|
145 | |
138 | # then connect anew |
146 | # then connect anew |
139 | $dbcache{$id} = |
147 | $dbcache{$id} = |
140 | eval { DBI->connect($dsn, $user, $pass, $flags) } |
148 | eval { DBI->connect($dsn, $user, $pass, $flags) } |
141 | || eval { DBI->connect($dsn, $user, $pass, $flags) } |
149 | || eval { DBI->connect($dsn, $user, $pass, $flags) } |
142 | || die "unable to connect to database $dsn: $DBI::errstr\n"; |
150 | || die "unable to connect to database $dsn: $DBI::errstr\n"; |
… | |
… | |
212 | my($name, $amount) = sql_fetch "select ...", args... |
220 | my($name, $amount) = sql_fetch "select ...", args... |
213 | |
221 | |
214 | ... and it's still quite fast unless you fetch large amounts of data. |
222 | ... and it's still quite fast unless you fetch large amounts of data. |
215 | |
223 | |
216 | C<sql_ufetch> is similar to C<sql_fetch> but upgrades all input values to |
224 | C<sql_ufetch> is similar to C<sql_fetch> but upgrades all input values to |
217 | utf8 and forces all result values to utf8. |
225 | utf8 and forces all result values to utf8 (this does I<not> include result |
|
|
226 | parameters, only return values. Using bind variables in cinjunction with |
|
|
227 | sql_u* functions results in undefined behaviour). |
218 | |
228 | |
219 | =item sql_fetchall <see sql_exec> |
229 | =item sql_fetchall <see sql_exec> |
220 | |
230 | |
221 | =item sql_ufetchall <see sql_uexec> |
231 | =item sql_ufetchall <see sql_uexec> |
222 | |
232 | |
… | |
… | |
239 | for (sql_fetchall "select name, age, place from user") { |
249 | for (sql_fetchall "select name, age, place from user") { |
240 | my ($name, $age, $place) = @$_; |
250 | my ($name, $age, $place) = @$_; |
241 | } |
251 | } |
242 | |
252 | |
243 | C<sql_ufetchall> is similar to C<sql_fetchall> but upgrades all input |
253 | C<sql_ufetchall> is similar to C<sql_fetchall> but upgrades all input |
244 | values to utf8 and forces all result values to utf8. |
254 | values to utf8 and forces all result values to utf8 (see the caveats in |
|
|
255 | the description of C<sql_ufetch>, though). |
245 | |
256 | |
246 | =item sql_exists "<table> where ...", args... |
257 | =item sql_exists "<table_references> where <where_condition>...", args... |
247 | |
258 | |
248 | =item sql_uexists <see sql_exists> |
259 | =item sql_uexists <see sql_exists> |
249 | |
260 | |
250 | Check wether the result of the sql-statement "select xxx from |
261 | Check wether the result of the sql-statement "select xxx from |
251 | $first_argument" would be empty or not (that is, imagine the string |
262 | $first_argument" would be empty or not (that is, imagine the string |