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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 = 0.13; |
49 | $VERSION = 0.143; |
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_uexec 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( |
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76 | done by this module. |
76 | done by this module. |
77 | |
77 | |
78 | =item $PApp::SQL::DBH |
78 | =item $PApp::SQL::DBH |
79 | |
79 | |
80 | The default database handle used by this module if no C<$DBH> was |
80 | The default database handle used by this module if no C<$DBH> was |
81 | specified as argument and no C<$DBH> is found in the current package. See |
81 | specified as argument. See C<sql_exec> for a discussion. |
82 | C<sql_exec> for a discussion. |
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83 | |
82 | |
84 | =item $PApp::SQL::Database |
83 | =item $PApp::SQL::Database |
85 | |
84 | |
86 | The current default C<PApp::SQL::Database>-object. Future versions might |
85 | The current default C<PApp::SQL::Database>-object. Future versions might |
87 | automatically fall back on this database and create database handles from |
86 | automatically fall back on this database and create database handles from |
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167 | with the same dbh and sql-statement twice (e.g. in a subroutine you |
166 | with the same dbh and sql-statement twice (e.g. in a subroutine you |
168 | called), the statement handle for the first call mustn't not be in use |
167 | called), the statement handle for the first call mustn't not be in use |
169 | anymore, as the subsequent call will re-use the handle. |
168 | anymore, as the subsequent call will re-use the handle. |
170 | |
169 | |
171 | The database handle (the first argument) is optional. If it is missing, |
170 | The database handle (the first argument) is optional. If it is missing, |
172 | C<sql_exec> first tries to use the variable C<$DBH> in the current (= |
171 | it tries to use database handle in C<$PApp::SQL::DBH>, which you can set |
173 | calling) package and, if that fails, it tries to use database handle in |
172 | before calling these functions. NOTICE: future and former versions of |
174 | C<$PApp::SQL::DBH>, which you can set before calling these functions. |
173 | PApp::SQL might also look up the global variable C<$DBH> in the callers |
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174 | package. |
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175 | |
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176 | =begin comment |
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177 | |
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178 | If it is missing, C<sql_exec> first tries to use the variable C<$DBH> |
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179 | in the current (= calling) package and, if that fails, it tries to use |
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180 | database handle in C<$PApp::SQL::DBH>, which you can set before calling |
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181 | these functions. |
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182 | |
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183 | =end comment |
175 | |
184 | |
176 | The actual return value from the C<$sth->execute> call is stored in the |
185 | The actual return value from the C<$sth->execute> call is stored in the |
177 | package-global (and exported) variable C<$sql_exec>. |
186 | package-global (and exported) variable C<$sql_exec>. |
178 | |
187 | |
179 | If any error occurs C<sql_exec> will throw an exception. |
188 | If any error occurs C<sql_exec> will throw an exception. |
180 | |
189 | |
181 | C<sql_uexec> is similar to C<sql_exec> but upgrades all input arguments to |
190 | C<sql_uexec> is similar to C<sql_exec> but upgrades all input arguments to |
182 | utf8 before calling the C<execute> method. |
191 | UTF-8 before calling the C<execute> method. |
183 | |
192 | |
184 | Examples: |
193 | Examples: |
185 | |
194 | |
186 | # easy one |
195 | # easy one |
187 | my $st = sql_exec "select name, id from table where id = ?", $id; |
196 | my $st = sql_exec "select name, id from table where id = ?", $id; |
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221 | my($name, $amount) = sql_fetch "select ...", args... |
230 | my($name, $amount) = sql_fetch "select ...", args... |
222 | |
231 | |
223 | ... and it's still quite fast unless you fetch large amounts of data. |
232 | ... and it's still quite fast unless you fetch large amounts of data. |
224 | |
233 | |
225 | C<sql_ufetch> is similar to C<sql_fetch> but upgrades all input values to |
234 | C<sql_ufetch> is similar to C<sql_fetch> but upgrades all input values to |
226 | utf8 and forces all result values to utf8 (this does I<not> include result |
235 | UTF-8 and forces all result values to UTF-8 (this does I<not> include result |
227 | parameters, only return values. Using bind variables in cinjunction with |
236 | parameters, only return values. Using bind variables in conjunction with |
228 | sql_u* functions results in undefined behaviour). |
237 | sql_u* functions might result in undefined behaviour - we use UTF-8 on |
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238 | bind-variables at execution time and it seems to work on DBD::mysql as it |
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239 | ignores the UTF-8 bit completely. Which just means that that DBD-driver is |
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240 | broken). |
229 | |
241 | |
230 | =item sql_fetchall <see sql_exec> |
242 | =item sql_fetchall <see sql_exec> |
231 | |
243 | |
232 | =item sql_ufetchall <see sql_uexec> |
244 | =item sql_ufetchall <see sql_uexec> |
233 | |
245 | |
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250 | for (sql_fetchall "select name, age, place from user") { |
262 | for (sql_fetchall "select name, age, place from user") { |
251 | my ($name, $age, $place) = @$_; |
263 | my ($name, $age, $place) = @$_; |
252 | } |
264 | } |
253 | |
265 | |
254 | C<sql_ufetchall> is similar to C<sql_fetchall> but upgrades all input |
266 | C<sql_ufetchall> is similar to C<sql_fetchall> but upgrades all input |
255 | values to utf8 and forces all result values to utf8 (see the caveats in |
267 | values to UTF-8 and forces all result values to UTF-8 (see the caveats in |
256 | the description of C<sql_ufetch>, though). |
268 | the description of C<sql_ufetch>, though). |
257 | |
269 | |
258 | =item sql_exists "<table_references> where <where_condition>...", args... |
270 | =item sql_exists "<table_references> where <where_condition>...", args... |
259 | |
271 | |
260 | =item sql_uexists <see sql_exists> |
272 | =item sql_uexists <see sql_exists> |
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264 | "select * from" were prepended to your statement (it isn't)). Should work |
276 | "select * from" were prepended to your statement (it isn't)). Should work |
265 | with every database but can be quite slow, except on mysql, where this |
277 | with every database but can be quite slow, except on mysql, where this |
266 | should be quite fast. |
278 | should be quite fast. |
267 | |
279 | |
268 | C<sql_uexists> is similar to C<sql_exists> but upgrades all parameters to |
280 | C<sql_uexists> is similar to C<sql_exists> but upgrades all parameters to |
269 | utf8. |
281 | UTF-8. |
270 | |
282 | |
271 | Examples: |
283 | Examples: |
272 | |
284 | |
273 | print "user 7 exists!\n" |
285 | print "user 7 exists!\n" |
274 | if sql_exists "user where id = ?", 7; |
286 | if sql_exists "user where id = ?", 7; |
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309 | |
321 | |
310 | =item [old-size] = cachesize [new-size] |
322 | =item [old-size] = cachesize [new-size] |
311 | |
323 | |
312 | Returns (and possibly changes) the LRU cache size used by C<sql_exec>. The |
324 | Returns (and possibly changes) the LRU cache size used by C<sql_exec>. The |
313 | default is somewhere around 50 (= the 50 last recently used statements |
325 | default is somewhere around 50 (= the 50 last recently used statements |
314 | will be cached). It shouldn't be too large, since a simple linear listed |
326 | will be cached). It shouldn't be too large, since a simple linear list |
315 | is used for the cache at the moment (which, for small (<100) cache sizes |
327 | is used for the cache at the moment (which, for small (<100) cache sizes |
316 | is actually quite fast). |
328 | is actually quite fast). |
317 | |
329 | |
318 | The function always returns the cache size in effect I<before> the call, |
330 | The function always returns the cache size in effect I<before> the call, |
319 | so, to nuke the cache (for example, when a database connection has died |
331 | so, to nuke the cache (for example, when a database connection has died |
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407 | |
419 | |
408 | Return the login name. |
420 | Return the login name. |
409 | |
421 | |
410 | =item $db->password |
422 | =item $db->password |
411 | |
423 | |
412 | Return the password (emphasizing the fact that the apssword is stored plaintext ;) |
424 | Return the password (emphasizing the fact that the password is stored plaintext ;) |
413 | |
425 | |
414 | =cut |
426 | =cut |
415 | |
427 | |
416 | sub dsn($) { |
428 | sub dsn($) { |
417 | my $self = shift; |
429 | my $self = shift; |