summaryrefslogtreecommitdiff
path: root/sql/item_jsonfunc.h
blob: 7da72dc7f8925972201c1a873ba194b1845dadba (plain)
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
#ifndef ITEM_JSONFUNC_INCLUDED
#define ITEM_JSONFUNC_INCLUDED

/* Copyright (c) 2016, MariaDB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */


/* This file defines all JSON functions */


#include <json_lib.h>
#include "item_cmpfunc.h"      // Item_bool_func
#include "item_strfunc.h"      // Item_str_func


class json_path_with_flags
{
public:
  json_path_t p;
  bool constant;
  bool parsed;
  json_path_step_t *cur_step;
  void set_constant_flag(bool s_constant)
  {
    constant= s_constant;
    parsed= FALSE;
  }
};


class Item_func_json_valid: public Item_bool_func
{
protected:
  String tmp_value;

public:
  Item_func_json_valid(THD *thd, Item *json) : Item_bool_func(thd, json) {}
  longlong val_int();
  const char *func_name() const { return "json_valid"; }
  void fix_length_and_dec()
  {
    Item_bool_func::fix_length_and_dec();
    maybe_null= 1;
  }
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_valid>(thd, mem_root, this); }
};


class Item_func_json_exists: public Item_bool_func
{
protected:
  json_path_with_flags path;
  String tmp_js, tmp_path;

public:
  Item_func_json_exists(THD *thd, Item *js, Item *i_path):
    Item_bool_func(thd, js, i_path) {}
  const char *func_name() const { return "json_exists"; }
  void fix_length_and_dec();
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_exists>(thd, mem_root, this); }
  longlong val_int();
};


class Item_func_json_value: public Item_str_func
{
protected:
  json_path_with_flags path;
  String tmp_js, tmp_path;

public:
  Item_func_json_value(THD *thd, Item *js, Item *i_path):
    Item_str_func(thd, js, i_path) {}
  const char *func_name() const { return "json_value"; }
  void fix_length_and_dec();
  String *val_str(String *);
  virtual bool check_and_get_value(json_engine_t *je, String *res, int *error);
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_value>(thd, mem_root, this); }
};


class Item_func_json_query: public Item_func_json_value
{
public:
  Item_func_json_query(THD *thd, Item *js, Item *i_path):
    Item_func_json_value(thd, js, i_path) {}
  bool is_json_type() { return true; }
  const char *func_name() const { return "json_query"; }
  bool check_and_get_value(json_engine_t *je, String *res, int *error);
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_query>(thd, mem_root, this); }
};


class Item_func_json_quote: public Item_str_func
{
protected:
  String tmp_s;

public:
  Item_func_json_quote(THD *thd, Item *s): Item_str_func(thd, s) {}
  const char *func_name() const { return "json_quote"; }
  void fix_length_and_dec();
  String *val_str(String *);
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_quote>(thd, mem_root, this); }
};


class Item_func_json_unquote: public Item_str_func
{
protected:
  String tmp_s;
  String *read_json(json_engine_t *je);
public:
  Item_func_json_unquote(THD *thd, Item *s): Item_str_func(thd, s) {}
  const char *func_name() const { return "json_unquote"; }
  void fix_length_and_dec();
  String *val_str(String *);
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_unquote>(thd, mem_root, this); }
};


class Item_json_str_multipath: public Item_str_func
{
protected:
  json_path_with_flags *paths;
  String *tmp_paths;
public:
  Item_json_str_multipath(THD *thd, List<Item> &list):
    Item_str_func(thd, list), tmp_paths(0) {}
  bool fix_fields(THD *thd, Item **ref);
  void cleanup();
  virtual uint get_n_paths() const = 0;
  bool is_json_type() { return true; }
};


class Item_func_json_extract: public Item_json_str_multipath
{
protected:
  String tmp_js;
public:
  String *read_json(String *str, json_value_types *type,
                    char **out_val, int *value_len);
  Item_func_json_extract(THD *thd, List<Item> &list):
    Item_json_str_multipath(thd, list) {}
  const char *func_name() const { return "json_extract"; }
  enum Functype functype() const   { return JSON_EXTRACT_FUNC; }
  void fix_length_and_dec();
  String *val_str(String *);
  longlong val_int();
  double val_real();
  uint get_n_paths() const { return arg_count - 1; }
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_extract>(thd, mem_root, this); }
};


class Item_func_json_contains: public Item_bool_func
{
protected:
  String tmp_js;
  json_path_with_flags path;
  String tmp_path;
  bool a2_constant, a2_parsed;
  String tmp_val, *val;
public:
  Item_func_json_contains(THD *thd, List<Item> &list):
    Item_bool_func(thd, list) {}
  const char *func_name() const { return "json_contains"; }
  void fix_length_and_dec();
  longlong val_int();
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_contains>(thd, mem_root, this); }
};


class Item_func_json_contains_path: public Item_bool_func
{
protected:
  String tmp_js;
  json_path_with_flags *paths;
  String *tmp_paths;
  bool mode_one;
  bool ooa_constant, ooa_parsed;
  bool *p_found;

public:
  Item_func_json_contains_path(THD *thd, List<Item> &list):
    Item_bool_func(thd, list), tmp_paths(0) {}
  const char *func_name() const { return "json_contains_path"; }
  bool fix_fields(THD *thd, Item **ref);
  void fix_length_and_dec();
  void cleanup();
  longlong val_int();
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_contains_path>(thd, mem_root, this); }
};


class Item_func_json_array: public Item_str_func
{
protected:
  String tmp_val;
  ulong result_limit;
public:
  Item_func_json_array(THD *thd):
    Item_str_func(thd) {}
  Item_func_json_array(THD *thd, List<Item> &list):
    Item_str_func(thd, list) {}
  String *val_str(String *);
  bool is_json_type() { return true; }
  void fix_length_and_dec();
  const char *func_name() const { return "json_array"; }
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_array>(thd, mem_root, this); }
};


class Item_func_json_array_append: public Item_json_str_multipath
{
protected:
  String tmp_js;
  String tmp_val;
public:
  Item_func_json_array_append(THD *thd, List<Item> &list):
    Item_json_str_multipath(thd, list) {}
  void fix_length_and_dec();
  String *val_str(String *);
  uint get_n_paths() const { return arg_count/2; }
  const char *func_name() const { return "json_array_append"; }
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_array_append>(thd, mem_root, this); }
};


class Item_func_json_array_insert: public Item_func_json_array_append
{
public:
  Item_func_json_array_insert(THD *thd, List<Item> &list):
    Item_func_json_array_append(thd, list) {}
  String *val_str(String *);
  const char *func_name() const { return "json_array_insert"; }
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_array_insert>(thd, mem_root, this); }
};


class Item_func_json_object: public Item_func_json_array
{
public:
  Item_func_json_object(THD *thd):
    Item_func_json_array(thd) {}
  Item_func_json_object(THD *thd, List<Item> &list):
    Item_func_json_array(thd, list) {}
  String *val_str(String *);
  bool is_json_type() { return true; }
  const char *func_name() const { return "json_object"; }
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_object>(thd, mem_root, this); }
};


class Item_func_json_merge: public Item_func_json_array
{
protected:
  String tmp_js1, tmp_js2;
public:
  Item_func_json_merge(THD *thd, List<Item> &list):
    Item_func_json_array(thd, list) {}
  String *val_str(String *);
  bool is_json_type() { return true; }
  const char *func_name() const { return "json_merge"; }
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_merge>(thd, mem_root, this); }
};


class Item_func_json_length: public Item_long_func
{
protected:
  json_path_with_flags path;
  String tmp_js;
  String tmp_path;
public:
  Item_func_json_length(THD *thd, List<Item> &list):
    Item_long_func(thd, list) {}
  const char *func_name() const { return "json_length"; }
  void fix_length_and_dec();
  longlong val_int();
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_length>(thd, mem_root, this); }
};


class Item_func_json_depth: public Item_long_func
{
protected:
  String tmp_js;
public:
  Item_func_json_depth(THD *thd, Item *js): Item_long_func(thd, js) {}
  const char *func_name() const { return "json_depth"; }
  void fix_length_and_dec() { max_length= 10; }
  longlong val_int();
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_depth>(thd, mem_root, this); }
};


class Item_func_json_type: public Item_str_func
{
protected:
  String tmp_js;
public:
  Item_func_json_type(THD *thd, Item *js): Item_str_func(thd, js) {}
  const char *func_name() const { return "json_type"; }
  void fix_length_and_dec();
  String *val_str(String *);
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_type>(thd, mem_root, this); }
};


class Item_func_json_insert: public Item_json_str_multipath
{
protected:
  String tmp_js;
  String tmp_val;
  bool mode_insert, mode_replace;
public:
  Item_func_json_insert(bool i_mode, bool r_mode, THD *thd, List<Item> &list):
    Item_json_str_multipath(thd, list),
      mode_insert(i_mode), mode_replace(r_mode) {}
  void fix_length_and_dec();
  String *val_str(String *);
  uint get_n_paths() const { return arg_count/2; }
  const char *func_name() const
  {
    return mode_insert ?
             (mode_replace ? "json_set" : "json_insert") : "json_update";
  }
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_insert>(thd, mem_root, this); }
};


class Item_func_json_remove: public Item_json_str_multipath
{
protected:
  String tmp_js;
public:
  Item_func_json_remove(THD *thd, List<Item> &list):
    Item_json_str_multipath(thd, list) {}
  void fix_length_and_dec();
  String *val_str(String *);
  uint get_n_paths() const { return arg_count - 1; }
  const char *func_name() const { return "json_remove"; }
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_remove>(thd, mem_root, this); }
};


class Item_func_json_keys: public Item_str_func
{
protected:
  json_path_with_flags path;
  String tmp_js, tmp_path;

public:
  Item_func_json_keys(THD *thd, List<Item> &list):
    Item_str_func(thd, list) {}
  const char *func_name() const { return "json_keys"; }
  void fix_length_and_dec();
  String *val_str(String *);
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_keys>(thd, mem_root, this); }
};


class Item_func_json_search: public Item_json_str_multipath
{
protected:
  String tmp_js, esc_value;
  bool mode_one;
  bool ooa_constant, ooa_parsed;
  int escape;
  int n_path_found;
  json_path_t sav_path;

  int compare_json_value_wild(json_engine_t *je, const String *cmp_str);

public:
  Item_func_json_search(THD *thd, List<Item> &list):
    Item_json_str_multipath(thd, list) {}
  const char *func_name() const { return "json_search"; }
  bool fix_fields(THD *thd, Item **ref);
  void fix_length_and_dec();
  String *val_str(String *);
  uint get_n_paths() const { return arg_count > 4 ? arg_count - 4 : 0; }
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_search>(thd, mem_root, this); }
};


class Item_func_json_format: public Item_str_func
{
public:
  enum formats
  {
    NONE,
    COMPACT,
    LOOSE,
    DETAILED
  };
protected:
  formats fmt;
  String tmp_js;
public:
  Item_func_json_format(THD *thd, Item *js, formats format):
    Item_str_func(thd, js), fmt(format) {}
  Item_func_json_format(THD *thd, List<Item> &list):
    Item_str_func(thd, list), fmt(DETAILED) {}

  const char *func_name() const;
  void fix_length_and_dec();
  String *val_str(String *str);
  String *val_json(String *str);
  bool is_json_type() { return true; }
  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
  { return get_item_copy<Item_func_json_format>(thd, mem_root, this); }
};


#endif /* ITEM_JSONFUNC_INCLUDED */