| 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658 | 5x
5x
4x
4x
4x
4x
13x
4x
218x
1x
5x
92x
92x
208x
60x
92x
92x
208x
60x
92x
92x
168x
168x
168x
168x
168x
24x
24x
4x
4x
4x
4x
4x
4x
16x
16x
4x
4x
160x
160x
4x
4x
8x
8x
4x
4x
4x
4x
4x
4x
4x
4x
4x
4x
4x
4x
4x
4x
52x
52x
52x
52x
52x
52x
16x
16x
16x
16x
16x
16x
16x
16x
16x
20x
4x
4x
16x
20x
20x
20x
20x
20x
20x
20x
28x
20x
20x
60x
60x
60x
24x
24x
24x
4x
4x
4x
4x
32x
32x
160x
24x
160x
20x
160x
8x
4x
8x
4x
4x
12x
4x
12x
4x
4x
4x
12x
8x
12x
8x
4x
8x
4x
4x
4x
5x
| const Helpers = require('./Helpers');
const QueryBuilderBase = require('./QueryBuilderBase');
/**
* Main object that builds SQL queries.
*
* @param {Driver} Driver - The syntax driver for the database
* @param {Adapter} Adapter - The database module adapter for running queries
* @extends QueryBuilderBase
*/
class QueryBuilder extends QueryBuilderBase {
// ----------------------------------------------------------------------------
// ! Miscellaneous Methods
// ----------------------------------------------------------------------------
/**
* Run a set of queries from a file
*
* @param {string} file - The path to the sql file
* @param {string} [separator=';'] - The character separating each query
* @return {Promise} - The result of all the queries
*/
queryFile (file, separator = ';') {
return Helpers.readFile(file).then(sqlFile => {
const queries = sqlFile.split(separator);
const results = [];
queries.forEach(sql => {
results.push(this.query(sql));
});
return Promise.all(results);
});
}
/**
* Run an arbitrary sql query. Run as a prepared statement.
*
* @param {string} sql - The sql to execute
* @param {Array} [params] - The query parameters
* @return {Promise} - Promise with result of query
*/
query (sql, params) {
return this.adapter.execute(sql, params);
}
/**
* Reset the object state for a new query
*
* @return {void}
*/
resetQuery () {
this._resetState();
}
/**
* Returns the current class state for testing or other purposes
*
* @private
* @return {Object} - The State object
*/
getState () {
return this.state;
}
/**
* Empties the selected database table
*
* @param {string} table - the name of the table to truncate
* @return {void|Promise} - Returns a promise if no callback is supplied
*/
truncate (table) {
return this.query(this.driver.truncate(table));
}
/**
* Closes the database connection for the current adapter
*
* @return {void}
*/
end () {
this.adapter.close();
}
// ------------------------------------------------------------------------
// ! Query Builder Methods
// ------------------------------------------------------------------------
/**
* Specify rows to select in the query
*
* @param {String|Array} fields - The fields to select from the current table
* @example query.select('foo, bar'); // Select multiple fields with a string
* @example query.select(['foo', 'bar']); // Select multiple fileds with an array
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
select (fields) {
// Split/trim fields by comma
fields = (Array.isArray(fields))
? fields
: fields.split(',').map(Helpers.stringTrim);
// Split on 'As'
fields.forEach((field, index) => {
if (/as/i.test(field)) {
fields[index] = field.split(/ as /i).map(Helpers.stringTrim);
}
});
const safeArray = this.driver.quoteIdentifiers(fields);
// Join the strings back together
safeArray.forEach((field, index) => {
if (Array.isArray(field)) {
safeArray[index] = safeArray[index].join(' AS ');
}
});
this.state.selectString += safeArray.join(', ');
return this;
}
/**
* Specify the database table to select from
*
* @param {String} tableName - The table to use for the current query
* @example query.from('tableName');
* @example query.from('tableName t'); // Select the table with an alias
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
from (tableName) {
// Split identifiers on spaces
let identArray = tableName.trim().split(' ').map(Helpers.stringTrim);
// Quote/prefix identifiers
identArray[0] = this.driver.quoteTable(identArray[0]);
identArray = this.driver.quoteIdentifiers(identArray);
// Put it back together
this.state.fromString = identArray.join(' ');
return this;
}
/**
* Add a 'like/ and like' clause to the query
*
* @param {String} field - The name of the field to compare to
* @param {String} val - The value to compare to
* @param {String} [pos=both] - The placement of the wildcard character(s): before, after, or both
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
like (field, val, pos) {
this._like(field, val, pos, ' LIKE ', 'AND');
return this;
}
/**
* Add a 'not like/ and not like' clause to the query
*
* @param {String} field - The name of the field to compare to
* @param {String} val - The value to compare to
* @param {String} [pos=both] - The placement of the wildcard character(s): before, after, or both
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
notLike (field, val, pos) {
this._like(field, val, pos, ' NOT LIKE ', 'AND');
return this;
}
/**
* Add an 'or like' clause to the query
*
* @param {String} field - The name of the field to compare to
* @param {String} val - The value to compare to
* @param {String} [pos=both] - The placement of the wildcard character(s): before, after, or both
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
orLike (field, val, pos) {
this._like(field, val, pos, ' LIKE ', 'OR');
return this;
}
/**
* Add an 'or not like' clause to the query
*
* @param {String} field - The name of the field to compare to
* @param {String} val - The value to compare to
* @param {String} [pos=both] - The placement of the wildcard character(s): before, after, or both
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
orNotLike (field, val, pos) {
this._like(field, val, pos, ' NOT LIKE ', 'OR');
return this;
}
/**
* Add a 'having' clause
*
* @param {String|Object} key - The name of the field and the comparision operator, or an object
* @param {String|Number} [val] - The value to compare if the value of key is a string
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
having (key, val = null) {
this._having(key, val, 'AND');
return this;
}
/**
* Add an 'or having' clause
*
* @param {String|Object} key - The name of the field and the comparision operator, or an object
* @param {String|Number} [val] - The value to compare if the value of key is a string
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
orHaving (key, val = null) {
this._having(key, val, 'OR');
return this;
}
/**
* Set a 'where' clause
*
* @param {String|Object} key - The name of the field and the comparision operator, or an object
* @param {String|Number} [val] - The value to compare if the value of key is a string
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
where (key, val) {
this._where(key, val, 'AND');
return this;
}
/**
* Set a 'or where' clause
*
* @param {String|Object} key - The name of the field and the comparision operator, or an object
* @param {String|Number} [val] - The value to compare if the value of key is a string
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
orWhere (key, val) {
this._where(key, val, 'OR');
return this;
}
/**
* Select a field that is Null
*
* @param {String} field - The name of the field that has a NULL value
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
whereIsNull (field) {
this._whereNull(field, 'IS NULL', 'AND');
return this;
}
/**
* Specify that a field IS NOT NULL
*
* @param {String} field - The name so the field that is not to be null
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
whereIsNotNull (field) {
this._whereNull(field, 'IS NOT NULL', 'AND');
return this;
}
/**
* Field is null prefixed with 'OR'
*
* @param {String} field - The name of the field
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
orWhereIsNull (field) {
this._whereNull(field, 'IS NULL', 'OR');
return this;
}
/**
* Field is not null prefixed with 'OR'
*
* @param {String} field - The name of the field
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
orWhereIsNotNull (field) {
this._whereNull(field, 'IS NOT NULL', 'OR');
return this;
}
/**
* Set a 'where in' clause
*
* @param {String} key - the field to search
* @param {Array} values - the array of items to search in
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
whereIn (key, values) {
this._whereIn(key, values, 'IN', 'AND');
return this;
}
/**
* Set a 'or where in' clause
*
* @param {String} key - the field to search
* @param {Array} values - the array of items to search in
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
orWhereIn (key, values) {
this._whereIn(key, values, 'IN', 'OR');
return this;
}
/**
* Set a 'where not in' clause
*
* @param {String} key - the field to search
* @param {Array} values - the array of items to search in
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
whereNotIn (key, values) {
this._whereIn(key, values, 'NOT IN', 'AND');
return this;
}
/**
* Set a 'or where not in' clause
*
* @param {String} key - the field to search
* @param {Array} values - the array of items to search in
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
orWhereNotIn (key, values) {
this._whereIn(key, values, 'NOT IN', 'OR');
return this;
}
/**
* Set values for insertion or updating
*
* @param {String|Object} key - The key or object to use
* @param {String} [val] - The value if using a scalar key
* @example query.set('foo', 'bar'); // Set a key, value pair
* @example query.set({foo:'bar'}); // Set with an object
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
set (key, val) {
// Set the appropriate state variables
this._mixedSet('setArrayKeys', 'key', key, val);
this._mixedSet('values', 'value', key, val);
// Use the keys of the array to make the insert/update string
// and escape the field names
this.state.setArrayKeys = this.state.setArrayKeys.map(this.driver._quote);
// Generate the "set" string
this.state.setString = this.state.setArrayKeys.join('=?,');
this.state.setString += '=?';
return this;
}
/**
* Add a join clause to the query
*
* @param {String} table - The table you are joining
* @param {String} cond - The join condition.
* @param {String} [type='inner'] - The type of join, which defaults to inner
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
join (table, cond, type) {
type = type || 'inner';
// Prefix/quote table name
table = table.split(' ').map(Helpers.stringTrim);
table[0] = this.driver.quoteTable(table[0]);
table = table.map(this.driver.quoteIdentifiers);
table = table.join(' ');
// Parse out the join condition
const parsedCondition = this.parser.compileJoin(cond);
const condition = `${table} ON ${parsedCondition}`;
// Append the join condition to the query map
this._appendMap(`\n${type.toUpperCase()} JOIN `, condition, 'join');
return this;
}
/**
* Group the results by the selected field(s)
*
* @param {String|Array} field - The name of the field to group by
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
groupBy (field) {
if (!Helpers.isScalar(field)) {
const newGroupArray = field.map(this.driver.quoteIdentifiers);
this.state.groupArray = this.state.groupArray.concat(newGroupArray);
} else {
this.state.groupArray.push(this.driver.quoteIdentifiers(field));
}
this.state.groupString = ` GROUP BY ${this.state.groupArray.join(',')}`;
return this;
}
/**
* Order the results by the selected field(s)
*
* @param {String} field - The field(s) to order by
* @param {String} [type='ASC'] - The order direction, ASC or DESC
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
orderBy (field, type) {
type = type || 'ASC';
// Set the fields for later manipulation
field = this.driver.quoteIdentifiers(field);
this.state.orderArray[field] = type;
const orderClauses = [];
// Flatten key/val pairs into an array of space-separated pairs
Object.keys(this.state.orderArray).forEach(key => {
orderClauses.push(`${key} ${this.state.orderArray[key].toUpperCase()}`);
});
// Set the final string
this.state.orderString = ` ORDER BY ${orderClauses.join(', ')}`;
return this;
}
/**
* Put a limit on the query
*
* @param {Number} limit - The maximum number of rows to fetch
* @param {Number} [offset] - The row number to start from
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
limit (limit, offset) {
this.state.limit = limit;
this.state.offset = offset || null;
return this;
}
/**
* Adds an open paren to the current query for logical grouping
*
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
groupStart () {
const conj = (this.state.queryMap.length < 1) ? ' WHERE ' : ' AND ';
this._appendMap(conj, '(', 'groupStart');
return this;
}
/**
* Adds an open paren to the current query for logical grouping,
* prefixed with 'OR'
*
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
orGroupStart () {
this._appendMap('', ' OR (', 'groupStart');
return this;
}
/**
* Adds an open paren to the current query for logical grouping,
* prefixed with 'OR NOT'
*
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
orNotGroupStart () {
this._appendMap('', ' OR NOT (', 'groupStart');
return this;
}
/**
* Ends a logical grouping started with one of the groupStart methods
*
* @return {QueryBuilder} - The Query Builder object, for chaining
*/
groupEnd () {
this._appendMap('', ')', 'groupEnd');
return this;
}
// ------------------------------------------------------------------------
// ! Result Methods
// ------------------------------------------------------------------------
/**
* Get the results of the compiled query
*
* @param {String} [table] - The table to select from
* @param {Number} [limit] - A limit for the query
* @param {Number} [offset] - An offset for the query
* @example query.get('table_name').then(promiseCallback); // Get all the rows in the table
* @example query.get('table_name', 5); // Get 5 rows from the table
* @example query.get(); // Get the results of a query generated with other methods
* @return {Promise<Result>} - Promise containing the result of the query
*/
get (table, limit, offset) {
if (table) {
this.from(table);
}
if (limit) {
this.limit(limit, offset);
}
// Run the query
return this._run('get', table);
}
/**
* Run the generated insert query
*
* @param {String} table - The table to insert into
* @param {Object} [data] - Data to insert, if not already added with the 'set' method
* @return {Promise<Result>} - Promise containing the result of the query
*/
insert (table, data) {
if (data) {
this.set(data);
}
// Run the query
return this._run('insert', this.driver.quoteTable(table));
}
/**
* Insert multiple sets of rows at a time
*
* @param {String} table - The table to insert into
* @param {Array} data - The array of objects containing data rows to insert
* @example query.insertBatch('foo',[{id:1,val:'bar'},{id:2,val:'baz'}])
*.then(promiseCallback);
* @return {Promise<Result>} - Promise containing the result of the query
*/
insertBatch (table, data) {
const batch = this.driver.insertBatch(table, data);
// Run the query
return this.query(batch.sql, batch.values);
}
/**
* Run the generated update query
*
* @param {String} table - The table to insert into
* @param {Object} [data] - Data to insert, if not already added with the 'set' method
* @return {Promise<Result>} - Promise containing the result of the query
*/
update (table, data) {
if (data) {
this.set(data);
}
// Run the query
return this._run('update', this.driver.quoteTable(table));
}
/**
* Creates a batch update sql statement
*
* @param {String} table - The table to update
* @param {Object} data - Batch insert data
* @param {String} updateKey - The field in the table to compare against for updating
* @return {Number} Number of rows updated
*/
updateBatch (table, data, updateKey) {
const [sql, insertData, affectedRows] = this.driver.updateBatch(table, data, updateKey);
this._run('', table, sql, insertData);
return affectedRows;
}
/**
* Run the generated delete query
*
* @param {String} table - The table to insert into
* @param {Object} [where] - Where clause for delete statement
* @return {Promise<Result>} - Promise containing the result of the query
*/
delete (table, where) {
if (where) {
this.where(where);
}
// Run the query
return this._run('delete', this.driver.quoteTable(table));
}
// ------------------------------------------------------------------------
// ! Methods returning SQL
// ------------------------------------------------------------------------
/**
* Return generated select query SQL
*
* @param {String} [table] - the name of the table to retrieve from
* @param {Boolean} [reset=true] - Whether to reset the query builder so another query can be built
* @return {String} - The compiled sql statement
*/
getCompiledSelect (table, reset = true) {
if (table) {
this.from(table);
}
return this._getCompile('get', table, reset);
}
/**
* Return generated insert query SQL
*
* @param {String} table - the name of the table to insert into
* @param {Boolean} [reset=true] - Whether to reset the query builder so another query can be built
* @return {String} - The compiled sql statement
*/
getCompiledInsert (table, reset = true) {
return this._getCompile('insert', this.driver.quoteTable(table), reset);
}
/**
* Return generated update query SQL
*
* @param {String} table - the name of the table to update
* @param {Boolean} [reset=true] - Whether to reset the query builder so another query can be built
* @return {String} - The compiled sql statement
*/
getCompiledUpdate (table, reset = true) {
return this._getCompile('update', this.driver.quoteTable(table), reset);
}
/**
* Return generated delete query SQL
*
* @param {String} table - the name of the table to delete from
* @param {Boolean} [reset=true] - Whether to reset the query builder so another query can be built
* @return {String} - The compiled sql statement
*/
getCompiledDelete (table, reset = true) {
return this._getCompile('delete', this.driver.quoteTable(table), reset);
}
}
module.exports = QueryBuilder;
|