4
* Copyright (C) 2009 Tim Marston <edam@waxworlds.org>
4
* Copyright (C) 2009 Tim Marston <tim@ed.am>
6
6
* This file is part of sqlite3cc (hereafter referred to as "this program").
7
* See http://www.waxworlds.org/edam/software/sqlite3cc for more information.
9
* This program is free software: you can redistribute it and/or modify
10
* it under the terms of the GNU Lesser General Public License as published
11
* by the Free Software Foundation, either version 3 of the License, or
12
* (at your option) any later version.
14
* This program is distributed in the hope that it will be useful,
15
* but WITHOUT ANY WARRANTY; without even the implied warranty of
16
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17
* GNU Lesser General Public License for more details.
7
* See http://ed.am/dev/sqlite3cc for more information.
9
* This program is free software: you can redistribute it and/or modify it under
10
* the terms of the GNU Lesser General Public License as published by the Free
11
* Software Foundation, either version 3 of the License, or (at your option) any
14
* This program is distributed in the hope that it will be useful, but WITHOUT
15
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
16
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
19
19
* You should have received a copy of the GNU Lesser General Public License
20
20
* along with this program. If not, see <http://www.gnu.org/licenses/>.
45
* The statement class represents an SQL statement. It is the base class for
51
* The statement class represents an SQL statement. It is the base class for
46
52
* both the command and the query classes, which should be used for those
47
* purposes. The basic_statement class its self has protected instantiation.
53
* purposes. The basic_statement class its self has protected instantiation.
49
55
class basic_statement
51
private boost::noncopyable
53
57
//______________________________________________________________________________
58
* Constructor that provides a database upon which to act and the SQL
62
* Constructor that provides a connection upon which to act and the SQL
60
* @param database a reference to a database
65
* @param connection a reference to a connection
61
66
* @param sql an SQL statement in UTF-8
63
68
explicit basic_statement(
69
connection &connection,
65
70
const std::string &sql );
68
* Constructor that provides a database upon which to act.
69
* @param database a reference to a database
70
* @param sql an SQL statement in UTF-8
73
* Constructor that provides a connection upon which to act.
75
* @param connection a reference to a connection
72
77
explicit basic_statement(
78
connection &connection );
75
virtual ~basic_statement() throw( );
80
virtual ~basic_statement();
77
82
//______________________________________________________________________________
78
83
// public interface
88
94
const std::string &sql );
91
* Reset the statement, ready to re-execute it. This does not clear any of
97
* Reset the statement, ready to re-execute it. This does not clear any of
92
98
* the values bound to the statement.
93
100
* @returns an sqlite error code
94
101
* @see sqlite3_reset()
99
106
* Clears the values bound to a statement to NULL.
100
108
* @returns an sqlite error code
101
109
* @see sqlite3_clear_bindings()
103
111
int clear_bindings();
106
* Bind a value to the SQL statement via it's index. This template will take
107
* a variety of data types and bind them as text. This is how sqlite
114
* Bind a value to the SQL statement via it's index. This template will
115
* take a variety of data types and bind them as text. This is how sqlite
108
116
* internally stores the data anyway, so always binding as text just means
109
117
* we do the conversion instead of sqlite and is no less efficient.
110
119
* @param index the index of the parameter to bind to
111
120
* @param value the value to bind
112
121
* @returns an sqlite error code
126
135
* Bind a string value to the SQL statement via it's index where the value
127
* of that string will not change for the duration of the statement. This is
128
* more optimal because sqlite will not have to make it's own copy of the
136
* of that string will not change for the duration of the statement. This
137
* is more optimal because sqlite will not have to take it's own copy of the
130
140
* @param index the index of the parameter to bind to
131
141
* @param value the invariant string value
142
* @param value_length the length of the string including zero-terminator
132
143
* @returns an sqlite error code
133
144
* @see sqlite3_bind_text()
141
152
* Bind a string value to the SQL statement via it's index where the value
142
* of that string will not change for the duration of the statement. This is
143
* more optimal because sqlite will not have to make it's own copy of the
153
* of that string will not change for the duration of the statement. This
154
* is more optimal because sqlite will not have to take it's own copy of the
145
157
* @param index the index of the parameter to bind to
146
158
* @param value the invariant string value
147
159
* @returns an sqlite error code
155
167
* Bind a string value to the SQL statement via it's index where the value
156
* of that string will not change for the duration of the statement. This is
157
* more optimal because sqlite will not have to make it's own copy of the
168
* of that string will not change for the duration of the statement. This
169
* is more optimal because sqlite will not have to take it's own copy of the
159
172
* @param index the index of the parameter to bind to
160
173
* @param value the invariant string value
161
174
* @returns an sqlite error code
175
189
unsigned int index );
178
* Bind a value to the SQL statement via a named parameter. This template
179
* will take a variety of data types and bind them as text. This is how
192
* Bind a value to the SQL statement via a named parameter. This template
193
* will take a variety of data types and bind them as text. This is how
180
194
* sqlite internally stores the data anyway, so always binding as text just
181
195
* means we do the conversion instead of sqlite and is no less efficient.
182
197
* @param name the named parameter to bind to
183
198
* @param value the value to bind
184
199
* @returns an sqlite error code
196
211
* Bind a string value to the SQL statement via a named parameter where the
197
* string value will not change for the duration of the statement. This
198
* prevents a copy of the string being taken.
212
* string value will not change for the duration of the statement. This
213
* prevents sqlite from taking its own copy of the string.
199
215
* @param name the named parameter to bind to
200
216
* @param value the invariant string value
217
* @param value_length the length of the string including zero-terminator
201
218
* @returns an sqlite error code
202
219
* @see sqlite3_bind_text()
210
227
* Bind a string value to the SQL statement via a named parameter where the
211
* string value will not change for the duration of the statement. This
228
* string value will not change for the duration of the statement. This
212
229
* prevents a copy of the string being taken.
213
231
* @param name the named parameter to bind to
214
232
* @param value the invariant string value
215
233
* @returns an sqlite error code
223
241
* Bind a string value to the SQL statement via a named parameter where the
224
* string value will not change for the duration of the statement. This
242
* string value will not change for the duration of the statement. This
225
243
* prevents a copy of the string being taken.
226
245
* @param name the named parameter to bind to
227
246
* @param value the invariant string value
228
247
* @returns an sqlite error code
245
265
* Stream operator is used to bind values to parameters automatically, in
246
* ascending order. In addition, the null, set_index() and execute auto-
247
* binding manipulators can be used.
266
* ascending order. In addition, the null and set_index() auto-binding
267
* manipulators can be used.
248
269
* @param value a value to bind
250
271
template< class T >
251
272
basic_statement &operator <<(
254
int error_code = bind( _bind_index, value );
255
if( error_code != SQLITE_OK ) throw sqlite_error( error_code );
275
int code = bind( _bind_index, value );
276
if( code != SQLITE_OK ) throw sqlite_error( _connection, code );
267
288
* Finalise an SQL statement.
268
290
* @returns an sqlite error code
269
291
* @see sqlite3_finalize()
274
* Step through one execution cycle of the SQL statement. If this is an SQL
275
* statement that doesn't return any rows, only one cycle is required,
276
* otherwise, each cycle will return another row
277
* @return an sqlite error code
278
* @see sqlite3_step()
283
* Get the index number of a named parameter
296
* Get the index number of a named parameter.
284
298
* @param parameter name
285
299
* @return index of named parameter
287
301
int bind_parameter_index(
288
302
const std::string &name );
290
/** the database upon which to act */
307
* @return sqlite error code
308
* @see sqlite3_step()
312
/** the connection upon which to act */
313
connection &_connection;
293
315
/** the statement handle */
294
316
sqlite3_stmt *_handle;
298
318
/** index used when auto-binding */
299
319
unsigned int _bind_index;
304
// template specialisations for statement::operator <<()
306
basic_statement &basic_statement::operator << < _null_t >(
309
basic_statement &basic_statement::operator << < _exec_t >(
312
basic_statement &basic_statement::operator << < _set_index_t >(
313
const _set_index_t &t );
324
// template specialisations for basic_statement::operator <<()
326
basic_statement &basic_statement::operator << < detail::null_t >(
327
const detail::null_t & );
329
basic_statement &basic_statement::operator << < detail::set_index_t >(
330
const detail::set_index_t &t );
333
} // namespace detail
316
336
} // namespace sqlite