Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * jsonb_util.c
4 : * converting between Jsonb and JsonbValues, and iterating.
5 : *
6 : * Copyright (c) 2014-2020, PostgreSQL Global Development Group
7 : *
8 : *
9 : * IDENTIFICATION
10 : * src/backend/utils/adt/jsonb_util.c
11 : *
12 : *-------------------------------------------------------------------------
13 : */
14 : #include "postgres.h"
15 :
16 : #include "catalog/pg_collation.h"
17 : #include "catalog/pg_type.h"
18 : #include "common/hashfn.h"
19 : #include "common/jsonapi.h"
20 : #include "miscadmin.h"
21 : #include "utils/builtins.h"
22 : #include "utils/datetime.h"
23 : #include "utils/json.h"
24 : #include "utils/jsonb.h"
25 : #include "utils/memutils.h"
26 : #include "utils/varlena.h"
27 :
28 : /*
29 : * Maximum number of elements in an array (or key/value pairs in an object).
30 : * This is limited by two things: the size of the JEntry array must fit
31 : * in MaxAllocSize, and the number of elements (or pairs) must fit in the bits
32 : * reserved for that in the JsonbContainer.header field.
33 : *
34 : * (The total size of an array's or object's elements is also limited by
35 : * JENTRY_OFFLENMASK, but we're not concerned about that here.)
36 : */
37 : #define JSONB_MAX_ELEMS (Min(MaxAllocSize / sizeof(JsonbValue), JB_CMASK))
38 : #define JSONB_MAX_PAIRS (Min(MaxAllocSize / sizeof(JsonbPair), JB_CMASK))
39 :
40 : static void fillJsonbValue(JsonbContainer *container, int index,
41 : char *base_addr, uint32 offset,
42 : JsonbValue *result);
43 : static bool equalsJsonbScalarValue(JsonbValue *a, JsonbValue *b);
44 : static int compareJsonbScalarValue(JsonbValue *a, JsonbValue *b);
45 : static Jsonb *convertToJsonb(JsonbValue *val);
46 : static void convertJsonbValue(StringInfo buffer, JEntry *header, JsonbValue *val, int level);
47 : static void convertJsonbArray(StringInfo buffer, JEntry *header, JsonbValue *val, int level);
48 : static void convertJsonbObject(StringInfo buffer, JEntry *header, JsonbValue *val, int level);
49 : static void convertJsonbScalar(StringInfo buffer, JEntry *header, JsonbValue *scalarVal);
50 :
51 : static int reserveFromBuffer(StringInfo buffer, int len);
52 : static void appendToBuffer(StringInfo buffer, const char *data, int len);
53 : static void copyToBuffer(StringInfo buffer, int offset, const char *data, int len);
54 : static short padBufferToInt(StringInfo buffer);
55 :
56 : static JsonbIterator *iteratorFromContainer(JsonbContainer *container, JsonbIterator *parent);
57 : static JsonbIterator *freeAndGetParent(JsonbIterator *it);
58 : static JsonbParseState *pushState(JsonbParseState **pstate);
59 : static void appendKey(JsonbParseState *pstate, JsonbValue *scalarVal);
60 : static void appendValue(JsonbParseState *pstate, JsonbValue *scalarVal);
61 : static void appendElement(JsonbParseState *pstate, JsonbValue *scalarVal);
62 : static int lengthCompareJsonbStringValue(const void *a, const void *b);
63 : static int lengthCompareJsonbString(const char *val1, int len1,
64 : const char *val2, int len2);
65 : static int lengthCompareJsonbPair(const void *a, const void *b, void *arg);
66 : static void uniqueifyJsonbObject(JsonbValue *object);
67 : static JsonbValue *pushJsonbValueScalar(JsonbParseState **pstate,
68 : JsonbIteratorToken seq,
69 : JsonbValue *scalarVal);
70 :
71 : /*
72 : * Turn an in-memory JsonbValue into a Jsonb for on-disk storage.
73 : *
74 : * There isn't a JsonbToJsonbValue(), because generally we find it more
75 : * convenient to directly iterate through the Jsonb representation and only
76 : * really convert nested scalar values. JsonbIteratorNext() does this, so that
77 : * clients of the iteration code don't have to directly deal with the binary
78 : * representation (JsonbDeepContains() is a notable exception, although all
79 : * exceptions are internal to this module). In general, functions that accept
80 : * a JsonbValue argument are concerned with the manipulation of scalar values,
81 : * or simple containers of scalar values, where it would be inconvenient to
82 : * deal with a great amount of other state.
83 : */
84 : Jsonb *
85 58588 : JsonbValueToJsonb(JsonbValue *val)
86 : {
87 : Jsonb *out;
88 :
89 58588 : if (IsAJsonbScalar(val))
90 43144 : {
91 : /* Scalar value */
92 43144 : JsonbParseState *pstate = NULL;
93 : JsonbValue *res;
94 : JsonbValue scalarArray;
95 :
96 43144 : scalarArray.type = jbvArray;
97 43144 : scalarArray.val.array.rawScalar = true;
98 43144 : scalarArray.val.array.nElems = 1;
99 :
100 43144 : pushJsonbValue(&pstate, WJB_BEGIN_ARRAY, &scalarArray);
101 43144 : pushJsonbValue(&pstate, WJB_ELEM, val);
102 43144 : res = pushJsonbValue(&pstate, WJB_END_ARRAY, NULL);
103 :
104 43144 : out = convertToJsonb(res);
105 : }
106 15444 : else if (val->type == jbvObject || val->type == jbvArray)
107 : {
108 14740 : out = convertToJsonb(val);
109 : }
110 : else
111 : {
112 : Assert(val->type == jbvBinary);
113 704 : out = palloc(VARHDRSZ + val->val.binary.len);
114 704 : SET_VARSIZE(out, VARHDRSZ + val->val.binary.len);
115 704 : memcpy(VARDATA(out), val->val.binary.data, val->val.binary.len);
116 : }
117 :
118 58588 : return out;
119 : }
120 :
121 : /*
122 : * Get the offset of the variable-length portion of a Jsonb node within
123 : * the variable-length-data part of its container. The node is identified
124 : * by index within the container's JEntry array.
125 : */
126 : uint32
127 1516868 : getJsonbOffset(const JsonbContainer *jc, int index)
128 : {
129 1516868 : uint32 offset = 0;
130 : int i;
131 :
132 : /*
133 : * Start offset of this entry is equal to the end offset of the previous
134 : * entry. Walk backwards to the most recent entry stored as an end
135 : * offset, returning that offset plus any lengths in between.
136 : */
137 4499888 : for (i = index - 1; i >= 0; i--)
138 : {
139 3941628 : offset += JBE_OFFLENFLD(jc->children[i]);
140 3941628 : if (JBE_HAS_OFF(jc->children[i]))
141 958608 : break;
142 : }
143 :
144 1516868 : return offset;
145 : }
146 :
147 : /*
148 : * Get the length of the variable-length portion of a Jsonb node.
149 : * The node is identified by index within the container's JEntry array.
150 : */
151 : uint32
152 1256496 : getJsonbLength(const JsonbContainer *jc, int index)
153 : {
154 : uint32 off;
155 : uint32 len;
156 :
157 : /*
158 : * If the length is stored directly in the JEntry, just return it.
159 : * Otherwise, get the begin offset of the entry, and subtract that from
160 : * the stored end+1 offset.
161 : */
162 1256496 : if (JBE_HAS_OFF(jc->children[index]))
163 : {
164 428900 : off = getJsonbOffset(jc, index);
165 428900 : len = JBE_OFFLENFLD(jc->children[index]) - off;
166 : }
167 : else
168 827596 : len = JBE_OFFLENFLD(jc->children[index]);
169 :
170 1256496 : return len;
171 : }
172 :
173 : /*
174 : * BT comparator worker function. Returns an integer less than, equal to, or
175 : * greater than zero, indicating whether a is less than, equal to, or greater
176 : * than b. Consistent with the requirements for a B-Tree operator class
177 : *
178 : * Strings are compared lexically, in contrast with other places where we use a
179 : * much simpler comparator logic for searching through Strings. Since this is
180 : * called from B-Tree support function 1, we're careful about not leaking
181 : * memory here.
182 : */
183 : int
184 223776 : compareJsonbContainers(JsonbContainer *a, JsonbContainer *b)
185 : {
186 : JsonbIterator *ita,
187 : *itb;
188 223776 : int res = 0;
189 :
190 223776 : ita = JsonbIteratorInit(a);
191 223776 : itb = JsonbIteratorInit(b);
192 :
193 : do
194 : {
195 : JsonbValue va,
196 : vb;
197 : JsonbIteratorToken ra,
198 : rb;
199 :
200 625484 : ra = JsonbIteratorNext(&ita, &va, false);
201 625484 : rb = JsonbIteratorNext(&itb, &vb, false);
202 :
203 625484 : if (ra == rb)
204 : {
205 625484 : if (ra == WJB_DONE)
206 : {
207 : /* Decisively equal */
208 22128 : break;
209 : }
210 :
211 603356 : if (ra == WJB_END_ARRAY || ra == WJB_END_OBJECT)
212 : {
213 : /*
214 : * There is no array or object to compare at this stage of
215 : * processing. jbvArray/jbvObject values are compared
216 : * initially, at the WJB_BEGIN_ARRAY and WJB_BEGIN_OBJECT
217 : * tokens.
218 : */
219 22232 : continue;
220 : }
221 :
222 581124 : if (va.type == vb.type)
223 : {
224 581124 : switch (va.type)
225 : {
226 357016 : case jbvString:
227 : case jbvNull:
228 : case jbvNumeric:
229 : case jbvBool:
230 357016 : res = compareJsonbScalarValue(&va, &vb);
231 357016 : break;
232 264 : case jbvArray:
233 :
234 : /*
235 : * This could be a "raw scalar" pseudo array. That's
236 : * a special case here though, since we still want the
237 : * general type-based comparisons to apply, and as far
238 : * as we're concerned a pseudo array is just a scalar.
239 : */
240 264 : if (va.val.array.rawScalar != vb.val.array.rawScalar)
241 0 : res = (va.val.array.rawScalar) ? -1 : 1;
242 264 : if (va.val.array.nElems != vb.val.array.nElems)
243 128 : res = (va.val.array.nElems > vb.val.array.nElems) ? 1 : -1;
244 264 : break;
245 223844 : case jbvObject:
246 223844 : if (va.val.object.nPairs != vb.val.object.nPairs)
247 71212 : res = (va.val.object.nPairs > vb.val.object.nPairs) ? 1 : -1;
248 223844 : break;
249 0 : case jbvBinary:
250 0 : elog(ERROR, "unexpected jbvBinary value");
251 : break;
252 0 : case jbvDatetime:
253 0 : elog(ERROR, "unexpected jbvDatetime value");
254 : break;
255 : }
256 581124 : }
257 : else
258 : {
259 : /* Type-defined order */
260 0 : res = (va.type > vb.type) ? 1 : -1;
261 : }
262 : }
263 : else
264 : {
265 : /*
266 : * It's safe to assume that the types differed, and that the va
267 : * and vb values passed were set.
268 : *
269 : * If the two values were of the same container type, then there'd
270 : * have been a chance to observe the variation in the number of
271 : * elements/pairs (when processing WJB_BEGIN_OBJECT, say). They're
272 : * either two heterogeneously-typed containers, or a container and
273 : * some scalar type.
274 : *
275 : * We don't have to consider the WJB_END_ARRAY and WJB_END_OBJECT
276 : * cases here, because we would have seen the corresponding
277 : * WJB_BEGIN_ARRAY and WJB_BEGIN_OBJECT tokens first, and
278 : * concluded that they don't match.
279 : */
280 : Assert(ra != WJB_END_ARRAY && ra != WJB_END_OBJECT);
281 : Assert(rb != WJB_END_ARRAY && rb != WJB_END_OBJECT);
282 :
283 : Assert(va.type != vb.type);
284 : Assert(va.type != jbvBinary);
285 : Assert(vb.type != jbvBinary);
286 : /* Type-defined order */
287 0 : res = (va.type > vb.type) ? 1 : -1;
288 : }
289 : }
290 603356 : while (res == 0);
291 :
292 425652 : while (ita != NULL)
293 : {
294 201876 : JsonbIterator *i = ita->parent;
295 :
296 201876 : pfree(ita);
297 201876 : ita = i;
298 : }
299 425652 : while (itb != NULL)
300 : {
301 201876 : JsonbIterator *i = itb->parent;
302 :
303 201876 : pfree(itb);
304 201876 : itb = i;
305 : }
306 :
307 223776 : return res;
308 : }
309 :
310 : /*
311 : * Find value in object (i.e. the "value" part of some key/value pair in an
312 : * object), or find a matching element if we're looking through an array. Do
313 : * so on the basis of equality of the object keys only, or alternatively
314 : * element values only, with a caller-supplied value "key". The "flags"
315 : * argument allows the caller to specify which container types are of interest.
316 : *
317 : * This exported utility function exists to facilitate various cases concerned
318 : * with "containment". If asked to look through an object, the caller had
319 : * better pass a Jsonb String, because their keys can only be strings.
320 : * Otherwise, for an array, any type of JsonbValue will do.
321 : *
322 : * In order to proceed with the search, it is necessary for callers to have
323 : * both specified an interest in exactly one particular container type with an
324 : * appropriate flag, as well as having the pointed-to Jsonb container be of
325 : * one of those same container types at the top level. (Actually, we just do
326 : * whichever makes sense to save callers the trouble of figuring it out - at
327 : * most one can make sense, because the container either points to an array
328 : * (possibly a "raw scalar" pseudo array) or an object.)
329 : *
330 : * Note that we can return a jbvBinary JsonbValue if this is called on an
331 : * object, but we never do so on an array. If the caller asks to look through
332 : * a container type that is not of the type pointed to by the container,
333 : * immediately fall through and return NULL. If we cannot find the value,
334 : * return NULL. Otherwise, return palloc()'d copy of value.
335 : */
336 : JsonbValue *
337 169338 : findJsonbValueFromContainer(JsonbContainer *container, uint32 flags,
338 : JsonbValue *key)
339 : {
340 169338 : JEntry *children = container->children;
341 169338 : int count = JsonContainerSize(container);
342 :
343 : Assert((flags & ~(JB_FARRAY | JB_FOBJECT)) == 0);
344 :
345 : /* Quick out without a palloc cycle if object/array is empty */
346 169338 : if (count <= 0)
347 14988 : return NULL;
348 :
349 154350 : if ((flags & JB_FARRAY) && JsonContainerIsArray(container))
350 64 : {
351 320 : JsonbValue *result = palloc(sizeof(JsonbValue));
352 320 : char *base_addr = (char *) (children + count);
353 320 : uint32 offset = 0;
354 : int i;
355 :
356 596 : for (i = 0; i < count; i++)
357 : {
358 532 : fillJsonbValue(container, i, base_addr, offset, result);
359 :
360 532 : if (key->type == result->type)
361 : {
362 472 : if (equalsJsonbScalarValue(key, result))
363 256 : return result;
364 : }
365 :
366 276 : JBE_ADVANCE_OFFSET(offset, children[i]);
367 : }
368 :
369 64 : pfree(result);
370 : }
371 154030 : else if ((flags & JB_FOBJECT) && JsonContainerIsObject(container))
372 : {
373 : /* Object key passed by caller must be a string */
374 : Assert(key->type == jbvString);
375 :
376 154030 : return getKeyJsonValueFromContainer(container, key->val.string.val,
377 : key->val.string.len, NULL);
378 : }
379 :
380 : /* Not found */
381 64 : return NULL;
382 : }
383 :
384 : /*
385 : * Find value by key in Jsonb object and fetch it into 'res', which is also
386 : * returned.
387 : *
388 : * 'res' can be passed in as NULL, in which case it's newly palloc'ed here.
389 : */
390 : JsonbValue *
391 206130 : getKeyJsonValueFromContainer(JsonbContainer *container,
392 : const char *keyVal, int keyLen, JsonbValue *res)
393 : {
394 206130 : JEntry *children = container->children;
395 206130 : int count = JsonContainerSize(container);
396 : char *baseAddr;
397 : uint32 stopLow,
398 : stopHigh;
399 :
400 : Assert(JsonContainerIsObject(container));
401 :
402 : /* Quick out without a palloc cycle if object is empty */
403 206130 : if (count <= 0)
404 1888 : return NULL;
405 :
406 : /*
407 : * Binary search the container. Since we know this is an object, account
408 : * for *Pairs* of Jentrys
409 : */
410 204242 : baseAddr = (char *) (children + count * 2);
411 204242 : stopLow = 0;
412 204242 : stopHigh = count;
413 667326 : while (stopLow < stopHigh)
414 : {
415 : uint32 stopMiddle;
416 : int difference;
417 : const char *candidateVal;
418 : int candidateLen;
419 :
420 499198 : stopMiddle = stopLow + (stopHigh - stopLow) / 2;
421 :
422 499198 : candidateVal = baseAddr + getJsonbOffset(container, stopMiddle);
423 499198 : candidateLen = getJsonbLength(container, stopMiddle);
424 :
425 499198 : difference = lengthCompareJsonbString(candidateVal, candidateLen,
426 : keyVal, keyLen);
427 :
428 499198 : if (difference == 0)
429 : {
430 : /* Found our key, return corresponding value */
431 36114 : int index = stopMiddle + count;
432 :
433 36114 : if (!res)
434 32030 : res = palloc(sizeof(JsonbValue));
435 :
436 36114 : fillJsonbValue(container, index, baseAddr,
437 : getJsonbOffset(container, index),
438 : res);
439 :
440 36114 : return res;
441 : }
442 : else
443 : {
444 463084 : if (difference < 0)
445 171816 : stopLow = stopMiddle + 1;
446 : else
447 291268 : stopHigh = stopMiddle;
448 : }
449 : }
450 :
451 : /* Not found */
452 168128 : return NULL;
453 : }
454 :
455 : /*
456 : * Get i-th value of a Jsonb array.
457 : *
458 : * Returns palloc()'d copy of the value, or NULL if it does not exist.
459 : */
460 : JsonbValue *
461 492 : getIthJsonbValueFromContainer(JsonbContainer *container, uint32 i)
462 : {
463 : JsonbValue *result;
464 : char *base_addr;
465 : uint32 nelements;
466 :
467 492 : if (!JsonContainerIsArray(container))
468 0 : elog(ERROR, "not a jsonb array");
469 :
470 492 : nelements = JsonContainerSize(container);
471 492 : base_addr = (char *) &container->children[nelements];
472 :
473 492 : if (i >= nelements)
474 36 : return NULL;
475 :
476 456 : result = palloc(sizeof(JsonbValue));
477 :
478 456 : fillJsonbValue(container, i, base_addr,
479 : getJsonbOffset(container, i),
480 : result);
481 :
482 456 : return result;
483 : }
484 :
485 : /*
486 : * A helper function to fill in a JsonbValue to represent an element of an
487 : * array, or a key or value of an object.
488 : *
489 : * The node's JEntry is at container->children[index], and its variable-length
490 : * data is at base_addr + offset. We make the caller determine the offset
491 : * since in many cases the caller can amortize that work across multiple
492 : * children. When it can't, it can just call getJsonbOffset().
493 : *
494 : * A nested array or object will be returned as jbvBinary, ie. it won't be
495 : * expanded.
496 : */
497 : static void
498 1091886 : fillJsonbValue(JsonbContainer *container, int index,
499 : char *base_addr, uint32 offset,
500 : JsonbValue *result)
501 : {
502 1091886 : JEntry entry = container->children[index];
503 :
504 1091886 : if (JBE_ISNULL(entry))
505 : {
506 2580 : result->type = jbvNull;
507 : }
508 1089306 : else if (JBE_ISSTRING(entry))
509 : {
510 748526 : result->type = jbvString;
511 748526 : result->val.string.val = base_addr + offset;
512 748526 : result->val.string.len = getJsonbLength(container, index);
513 : Assert(result->val.string.len >= 0);
514 : }
515 340780 : else if (JBE_ISNUMERIC(entry))
516 : {
517 230014 : result->type = jbvNumeric;
518 230014 : result->val.numeric = (Numeric) (base_addr + INTALIGN(offset));
519 : }
520 110766 : else if (JBE_ISBOOL_TRUE(entry))
521 : {
522 48998 : result->type = jbvBool;
523 48998 : result->val.boolean = true;
524 : }
525 61768 : else if (JBE_ISBOOL_FALSE(entry))
526 : {
527 52996 : result->type = jbvBool;
528 52996 : result->val.boolean = false;
529 : }
530 : else
531 : {
532 : Assert(JBE_ISCONTAINER(entry));
533 8772 : result->type = jbvBinary;
534 : /* Remove alignment padding from data pointer and length */
535 8772 : result->val.binary.data = (JsonbContainer *) (base_addr + INTALIGN(offset));
536 8772 : result->val.binary.len = getJsonbLength(container, index) -
537 8772 : (INTALIGN(offset) - offset);
538 : }
539 1091886 : }
540 :
541 : /*
542 : * Push JsonbValue into JsonbParseState.
543 : *
544 : * Used when parsing JSON tokens to form Jsonb, or when converting an in-memory
545 : * JsonbValue to a Jsonb.
546 : *
547 : * Initial state of *JsonbParseState is NULL, since it'll be allocated here
548 : * originally (caller will get JsonbParseState back by reference).
549 : *
550 : * Only sequential tokens pertaining to non-container types should pass a
551 : * JsonbValue. There is one exception -- WJB_BEGIN_ARRAY callers may pass a
552 : * "raw scalar" pseudo array to append it - the actual scalar should be passed
553 : * next and it will be added as the only member of the array.
554 : *
555 : * Values of type jbvBinary, which are rolled up arrays and objects,
556 : * are unpacked before being added to the result.
557 : */
558 : JsonbValue *
559 257994 : pushJsonbValue(JsonbParseState **pstate, JsonbIteratorToken seq,
560 : JsonbValue *jbval)
561 : {
562 : JsonbIterator *it;
563 257994 : JsonbValue *res = NULL;
564 : JsonbValue v;
565 : JsonbIteratorToken tok;
566 :
567 257994 : if (!jbval || (seq != WJB_ELEM && seq != WJB_VALUE) ||
568 85184 : jbval->type != jbvBinary)
569 : {
570 : /* drop through */
571 257790 : return pushJsonbValueScalar(pstate, seq, jbval);
572 : }
573 :
574 : /* unpack the binary and add each piece to the pstate */
575 204 : it = JsonbIteratorInit(jbval->val.binary.data);
576 1640 : while ((tok = JsonbIteratorNext(&it, &v, false)) != WJB_DONE)
577 1436 : res = pushJsonbValueScalar(pstate, tok,
578 : tok < WJB_BEGIN_ARRAY ? &v : NULL);
579 :
580 204 : return res;
581 : }
582 :
583 : /*
584 : * Do the actual pushing, with only scalar or pseudo-scalar-array values
585 : * accepted.
586 : */
587 : static JsonbValue *
588 259226 : pushJsonbValueScalar(JsonbParseState **pstate, JsonbIteratorToken seq,
589 : JsonbValue *scalarVal)
590 : {
591 259226 : JsonbValue *result = NULL;
592 :
593 259226 : switch (seq)
594 : {
595 52786 : case WJB_BEGIN_ARRAY:
596 : Assert(!scalarVal || scalarVal->val.array.rawScalar);
597 52786 : *pstate = pushState(pstate);
598 52786 : result = &(*pstate)->contVal;
599 52786 : (*pstate)->contVal.type = jbvArray;
600 52786 : (*pstate)->contVal.val.array.nElems = 0;
601 97258 : (*pstate)->contVal.val.array.rawScalar = (scalarVal &&
602 44472 : scalarVal->val.array.rawScalar);
603 52786 : if (scalarVal && scalarVal->val.array.nElems > 0)
604 : {
605 : /* Assume that this array is still really a scalar */
606 : Assert(scalarVal->type == jbvArray);
607 44472 : (*pstate)->size = scalarVal->val.array.nElems;
608 : }
609 : else
610 : {
611 8314 : (*pstate)->size = 4;
612 : }
613 105572 : (*pstate)->contVal.val.array.elems = palloc(sizeof(JsonbValue) *
614 52786 : (*pstate)->size);
615 52786 : break;
616 17840 : case WJB_BEGIN_OBJECT:
617 : Assert(!scalarVal);
618 17840 : *pstate = pushState(pstate);
619 17840 : result = &(*pstate)->contVal;
620 17840 : (*pstate)->contVal.type = jbvObject;
621 17840 : (*pstate)->contVal.val.object.nPairs = 0;
622 17840 : (*pstate)->size = 4;
623 35680 : (*pstate)->contVal.val.object.pairs = palloc(sizeof(JsonbPair) *
624 17840 : (*pstate)->size);
625 17840 : break;
626 38308 : case WJB_KEY:
627 : Assert(scalarVal->type == jbvString);
628 38308 : appendKey(*pstate, scalarVal);
629 38308 : break;
630 31260 : case WJB_VALUE:
631 : Assert(IsAJsonbScalar(scalarVal));
632 31260 : appendValue(*pstate, scalarVal);
633 31260 : break;
634 54188 : case WJB_ELEM:
635 : Assert(IsAJsonbScalar(scalarVal));
636 54188 : appendElement(*pstate, scalarVal);
637 54188 : break;
638 15038 : case WJB_END_OBJECT:
639 15038 : uniqueifyJsonbObject(&(*pstate)->contVal);
640 : /* fall through! */
641 64844 : case WJB_END_ARRAY:
642 : /* Steps here common to WJB_END_OBJECT case */
643 : Assert(!scalarVal);
644 64844 : result = &(*pstate)->contVal;
645 :
646 : /*
647 : * Pop stack and push current array/object as value in parent
648 : * array/object
649 : */
650 64844 : *pstate = (*pstate)->next;
651 64844 : if (*pstate)
652 : {
653 6952 : switch ((*pstate)->contVal.type)
654 : {
655 2576 : case jbvArray:
656 2576 : appendElement(*pstate, result);
657 2576 : break;
658 4376 : case jbvObject:
659 4376 : appendValue(*pstate, result);
660 4376 : break;
661 0 : default:
662 57892 : elog(ERROR, "invalid jsonb container type");
663 : }
664 : }
665 64844 : break;
666 0 : default:
667 0 : elog(ERROR, "unrecognized jsonb sequential processing token");
668 : }
669 :
670 259226 : return result;
671 : }
672 :
673 : /*
674 : * pushJsonbValue() worker: Iteration-like forming of Jsonb
675 : */
676 : static JsonbParseState *
677 70626 : pushState(JsonbParseState **pstate)
678 : {
679 70626 : JsonbParseState *ns = palloc(sizeof(JsonbParseState));
680 :
681 70626 : ns->next = *pstate;
682 70626 : return ns;
683 : }
684 :
685 : /*
686 : * pushJsonbValue() worker: Append a pair key to state when generating a Jsonb
687 : */
688 : static void
689 38308 : appendKey(JsonbParseState *pstate, JsonbValue *string)
690 : {
691 38308 : JsonbValue *object = &pstate->contVal;
692 :
693 : Assert(object->type == jbvObject);
694 : Assert(string->type == jbvString);
695 :
696 38308 : if (object->val.object.nPairs >= JSONB_MAX_PAIRS)
697 0 : ereport(ERROR,
698 : (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
699 : errmsg("number of jsonb object pairs exceeds the maximum allowed (%zu)",
700 : JSONB_MAX_PAIRS)));
701 :
702 38308 : if (object->val.object.nPairs >= pstate->size)
703 : {
704 3698 : pstate->size *= 2;
705 3698 : object->val.object.pairs = repalloc(object->val.object.pairs,
706 3698 : sizeof(JsonbPair) * pstate->size);
707 : }
708 :
709 38308 : object->val.object.pairs[object->val.object.nPairs].key = *string;
710 38308 : object->val.object.pairs[object->val.object.nPairs].order = object->val.object.nPairs;
711 38308 : }
712 :
713 : /*
714 : * pushJsonbValue() worker: Append a pair value to state when generating a
715 : * Jsonb
716 : */
717 : static void
718 35636 : appendValue(JsonbParseState *pstate, JsonbValue *scalarVal)
719 : {
720 35636 : JsonbValue *object = &pstate->contVal;
721 :
722 : Assert(object->type == jbvObject);
723 :
724 35636 : object->val.object.pairs[object->val.object.nPairs++].value = *scalarVal;
725 35636 : }
726 :
727 : /*
728 : * pushJsonbValue() worker: Append an element to state when generating a Jsonb
729 : */
730 : static void
731 56764 : appendElement(JsonbParseState *pstate, JsonbValue *scalarVal)
732 : {
733 56764 : JsonbValue *array = &pstate->contVal;
734 :
735 : Assert(array->type == jbvArray);
736 :
737 56764 : if (array->val.array.nElems >= JSONB_MAX_ELEMS)
738 0 : ereport(ERROR,
739 : (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
740 : errmsg("number of jsonb array elements exceeds the maximum allowed (%zu)",
741 : JSONB_MAX_ELEMS)));
742 :
743 56764 : if (array->val.array.nElems >= pstate->size)
744 : {
745 620 : pstate->size *= 2;
746 620 : array->val.array.elems = repalloc(array->val.array.elems,
747 620 : sizeof(JsonbValue) * pstate->size);
748 : }
749 :
750 56764 : array->val.array.elems[array->val.array.nElems++] = *scalarVal;
751 56764 : }
752 :
753 : /*
754 : * Given a JsonbContainer, expand to JsonbIterator to iterate over items
755 : * fully expanded to in-memory representation for manipulation.
756 : *
757 : * See JsonbIteratorNext() for notes on memory management.
758 : */
759 : JsonbIterator *
760 560154 : JsonbIteratorInit(JsonbContainer *container)
761 : {
762 560154 : return iteratorFromContainer(container, NULL);
763 : }
764 :
765 : /*
766 : * Get next JsonbValue while iterating
767 : *
768 : * Caller should initially pass their own, original iterator. They may get
769 : * back a child iterator palloc()'d here instead. The function can be relied
770 : * on to free those child iterators, lest the memory allocated for highly
771 : * nested objects become unreasonable, but only if callers don't end iteration
772 : * early (by breaking upon having found something in a search, for example).
773 : *
774 : * Callers in such a scenario, that are particularly sensitive to leaking
775 : * memory in a long-lived context may walk the ancestral tree from the final
776 : * iterator we left them with to its oldest ancestor, pfree()ing as they go.
777 : * They do not have to free any other memory previously allocated for iterators
778 : * but not accessible as direct ancestors of the iterator they're last passed
779 : * back.
780 : *
781 : * Returns "Jsonb sequential processing" token value. Iterator "state"
782 : * reflects the current stage of the process in a less granular fashion, and is
783 : * mostly used here to track things internally with respect to particular
784 : * iterators.
785 : *
786 : * Clients of this function should not have to handle any jbvBinary values
787 : * (since recursive calls will deal with this), provided skipNested is false.
788 : * It is our job to expand the jbvBinary representation without bothering them
789 : * with it. However, clients should not take it upon themselves to touch array
790 : * or Object element/pair buffers, since their element/pair pointers are
791 : * garbage. Also, *val will not be set when returning WJB_END_ARRAY or
792 : * WJB_END_OBJECT, on the assumption that it's only useful to access values
793 : * when recursing in.
794 : */
795 : JsonbIteratorToken
796 1793094 : JsonbIteratorNext(JsonbIterator **it, JsonbValue *val, bool skipNested)
797 : {
798 1793094 : if (*it == NULL)
799 82158 : return WJB_DONE;
800 :
801 : /*
802 : * When stepping into a nested container, we jump back here to start
803 : * processing the child. We will not recurse further in one call, because
804 : * processing the child will always begin in JBI_ARRAY_START or
805 : * JBI_OBJECT_START state.
806 : */
807 1710936 : recurse:
808 1715312 : switch ((*it)->state)
809 : {
810 12330 : case JBI_ARRAY_START:
811 : /* Set v to array on first array call */
812 12330 : val->type = jbvArray;
813 12330 : val->val.array.nElems = (*it)->nElems;
814 :
815 : /*
816 : * v->val.array.elems is not actually set, because we aren't doing
817 : * a full conversion
818 : */
819 12330 : val->val.array.rawScalar = (*it)->isScalar;
820 12330 : (*it)->curIndex = 0;
821 12330 : (*it)->curDataOffset = 0;
822 12330 : (*it)->curValueOffset = 0; /* not actually used */
823 : /* Set state for next call */
824 12330 : (*it)->state = JBI_ARRAY_ELEM;
825 12330 : return WJB_BEGIN_ARRAY;
826 :
827 30278 : case JBI_ARRAY_ELEM:
828 30278 : if ((*it)->curIndex >= (*it)->nElems)
829 : {
830 : /*
831 : * All elements within array already processed. Report this
832 : * to caller, and give it back original parent iterator (which
833 : * independently tracks iteration progress at its level of
834 : * nesting).
835 : */
836 11006 : *it = freeAndGetParent(*it);
837 11006 : return WJB_END_ARRAY;
838 : }
839 :
840 38544 : fillJsonbValue((*it)->container, (*it)->curIndex,
841 19272 : (*it)->dataProper, (*it)->curDataOffset,
842 : val);
843 :
844 19272 : JBE_ADVANCE_OFFSET((*it)->curDataOffset,
845 : (*it)->children[(*it)->curIndex]);
846 19272 : (*it)->curIndex++;
847 :
848 19272 : if (!IsAJsonbScalar(val) && !skipNested)
849 : {
850 : /* Recurse into container. */
851 1048 : *it = iteratorFromContainer(val->val.binary.data, *it);
852 1048 : goto recurse;
853 : }
854 : else
855 : {
856 : /*
857 : * Scalar item in array, or a container and caller didn't want
858 : * us to recurse into it.
859 : */
860 18224 : return WJB_ELEM;
861 : }
862 :
863 552200 : case JBI_OBJECT_START:
864 : /* Set v to object on first object call */
865 552200 : val->type = jbvObject;
866 552200 : val->val.object.nPairs = (*it)->nElems;
867 :
868 : /*
869 : * v->val.object.pairs is not actually set, because we aren't
870 : * doing a full conversion
871 : */
872 552200 : (*it)->curIndex = 0;
873 552200 : (*it)->curDataOffset = 0;
874 1104400 : (*it)->curValueOffset = getJsonbOffset((*it)->container,
875 552200 : (*it)->nElems);
876 : /* Set state for next call */
877 552200 : (*it)->state = JBI_OBJECT_KEY;
878 552200 : return WJB_BEGIN_OBJECT;
879 :
880 666872 : case JBI_OBJECT_KEY:
881 666872 : if ((*it)->curIndex >= (*it)->nElems)
882 : {
883 : /*
884 : * All pairs within object already processed. Report this to
885 : * caller, and give it back original containing iterator
886 : * (which independently tracks iteration progress at its level
887 : * of nesting).
888 : */
889 84992 : *it = freeAndGetParent(*it);
890 84992 : return WJB_END_OBJECT;
891 : }
892 : else
893 : {
894 : /* Return key of a key/value pair. */
895 1163760 : fillJsonbValue((*it)->container, (*it)->curIndex,
896 581880 : (*it)->dataProper, (*it)->curDataOffset,
897 : val);
898 581880 : if (val->type != jbvString)
899 0 : elog(ERROR, "unexpected jsonb type as object key");
900 :
901 : /* Set state for next call */
902 581880 : (*it)->state = JBI_OBJECT_VALUE;
903 581880 : return WJB_KEY;
904 : }
905 :
906 453632 : case JBI_OBJECT_VALUE:
907 : /* Set state for next call */
908 453632 : (*it)->state = JBI_OBJECT_KEY;
909 :
910 907264 : fillJsonbValue((*it)->container, (*it)->curIndex + (*it)->nElems,
911 453632 : (*it)->dataProper, (*it)->curValueOffset,
912 : val);
913 :
914 453632 : JBE_ADVANCE_OFFSET((*it)->curDataOffset,
915 : (*it)->children[(*it)->curIndex]);
916 453632 : JBE_ADVANCE_OFFSET((*it)->curValueOffset,
917 : (*it)->children[(*it)->curIndex + (*it)->nElems]);
918 453632 : (*it)->curIndex++;
919 :
920 : /*
921 : * Value may be a container, in which case we recurse with new,
922 : * child iterator (unless the caller asked not to, by passing
923 : * skipNested).
924 : */
925 453632 : if (!IsAJsonbScalar(val) && !skipNested)
926 : {
927 3328 : *it = iteratorFromContainer(val->val.binary.data, *it);
928 3328 : goto recurse;
929 : }
930 : else
931 450304 : return WJB_VALUE;
932 : }
933 :
934 0 : elog(ERROR, "invalid iterator state");
935 : return -1;
936 : }
937 :
938 : /*
939 : * Initialize an iterator for iterating all elements in a container.
940 : */
941 : static JsonbIterator *
942 564530 : iteratorFromContainer(JsonbContainer *container, JsonbIterator *parent)
943 : {
944 : JsonbIterator *it;
945 :
946 564530 : it = palloc0(sizeof(JsonbIterator));
947 564530 : it->container = container;
948 564530 : it->parent = parent;
949 564530 : it->nElems = JsonContainerSize(container);
950 :
951 : /* Array starts just after header */
952 564530 : it->children = container->children;
953 :
954 564530 : switch (container->header & (JB_FARRAY | JB_FOBJECT))
955 : {
956 12330 : case JB_FARRAY:
957 12330 : it->dataProper =
958 12330 : (char *) it->children + it->nElems * sizeof(JEntry);
959 12330 : it->isScalar = JsonContainerIsScalar(container);
960 : /* This is either a "raw scalar", or an array */
961 : Assert(!it->isScalar || it->nElems == 1);
962 :
963 12330 : it->state = JBI_ARRAY_START;
964 12330 : break;
965 :
966 552200 : case JB_FOBJECT:
967 552200 : it->dataProper =
968 552200 : (char *) it->children + it->nElems * sizeof(JEntry) * 2;
969 552200 : it->state = JBI_OBJECT_START;
970 552200 : break;
971 :
972 0 : default:
973 0 : elog(ERROR, "unknown type of jsonb container");
974 : }
975 :
976 564530 : return it;
977 : }
978 :
979 : /*
980 : * JsonbIteratorNext() worker: Return parent, while freeing memory for current
981 : * iterator
982 : */
983 : static JsonbIterator *
984 95998 : freeAndGetParent(JsonbIterator *it)
985 : {
986 95998 : JsonbIterator *v = it->parent;
987 :
988 95998 : pfree(it);
989 95998 : return v;
990 : }
991 :
992 : /*
993 : * Worker for "contains" operator's function
994 : *
995 : * Formally speaking, containment is top-down, unordered subtree isomorphism.
996 : *
997 : * Takes iterators that belong to some container type. These iterators
998 : * "belong" to those values in the sense that they've just been initialized in
999 : * respect of them by the caller (perhaps in a nested fashion).
1000 : *
1001 : * "val" is lhs Jsonb, and mContained is rhs Jsonb when called from top level.
1002 : * We determine if mContained is contained within val.
1003 : */
1004 : bool
1005 36756 : JsonbDeepContains(JsonbIterator **val, JsonbIterator **mContained)
1006 : {
1007 : JsonbValue vval,
1008 : vcontained;
1009 : JsonbIteratorToken rval,
1010 : rcont;
1011 :
1012 : /*
1013 : * Guard against stack overflow due to overly complex Jsonb.
1014 : *
1015 : * Functions called here independently take this precaution, but that
1016 : * might not be sufficient since this is also a recursive function.
1017 : */
1018 36756 : check_stack_depth();
1019 :
1020 36756 : rval = JsonbIteratorNext(val, &vval, false);
1021 36756 : rcont = JsonbIteratorNext(mContained, &vcontained, false);
1022 :
1023 36756 : if (rval != rcont)
1024 : {
1025 : /*
1026 : * The differing return values can immediately be taken as indicating
1027 : * two differing container types at this nesting level, which is
1028 : * sufficient reason to give up entirely (but it should be the case
1029 : * that they're both some container type).
1030 : */
1031 : Assert(rval == WJB_BEGIN_OBJECT || rval == WJB_BEGIN_ARRAY);
1032 : Assert(rcont == WJB_BEGIN_OBJECT || rcont == WJB_BEGIN_ARRAY);
1033 8 : return false;
1034 : }
1035 36748 : else if (rcont == WJB_BEGIN_OBJECT)
1036 : {
1037 : Assert(vval.type == jbvObject);
1038 : Assert(vcontained.type == jbvObject);
1039 :
1040 : /*
1041 : * If the lhs has fewer pairs than the rhs, it can't possibly contain
1042 : * the rhs. (This conclusion is safe only because we de-duplicate
1043 : * keys in all Jsonb objects; thus there can be no corresponding
1044 : * optimization in the array case.) The case probably won't arise
1045 : * often, but since it's such a cheap check we may as well make it.
1046 : */
1047 36508 : if (vval.val.object.nPairs < vcontained.val.object.nPairs)
1048 2480 : return false;
1049 :
1050 : /* Work through rhs "is it contained within?" object */
1051 : for (;;)
1052 600 : {
1053 : JsonbValue *lhsVal; /* lhsVal is from pair in lhs object */
1054 : JsonbValue lhsValBuf;
1055 :
1056 34628 : rcont = JsonbIteratorNext(mContained, &vcontained, false);
1057 :
1058 : /*
1059 : * When we get through caller's rhs "is it contained within?"
1060 : * object without failing to find one of its values, it's
1061 : * contained.
1062 : */
1063 34628 : if (rcont == WJB_END_OBJECT)
1064 34028 : return true;
1065 :
1066 : Assert(rcont == WJB_KEY);
1067 : Assert(vcontained.type == jbvString);
1068 :
1069 : /* First, find value by key... */
1070 : lhsVal =
1071 50528 : getKeyJsonValueFromContainer((*val)->container,
1072 25264 : vcontained.val.string.val,
1073 : vcontained.val.string.len,
1074 : &lhsValBuf);
1075 25264 : if (!lhsVal)
1076 21848 : return false;
1077 :
1078 : /*
1079 : * ...at this stage it is apparent that there is at least a key
1080 : * match for this rhs pair.
1081 : */
1082 3416 : rcont = JsonbIteratorNext(mContained, &vcontained, true);
1083 :
1084 : Assert(rcont == WJB_VALUE);
1085 :
1086 : /*
1087 : * Compare rhs pair's value with lhs pair's value just found using
1088 : * key
1089 : */
1090 3416 : if (lhsVal->type != vcontained.type)
1091 : {
1092 960 : return false;
1093 : }
1094 2456 : else if (IsAJsonbScalar(lhsVal))
1095 : {
1096 2368 : if (!equalsJsonbScalarValue(lhsVal, &vcontained))
1097 1832 : return false;
1098 : }
1099 : else
1100 : {
1101 : /* Nested container value (object or array) */
1102 : JsonbIterator *nestval,
1103 : *nestContained;
1104 :
1105 : Assert(lhsVal->type == jbvBinary);
1106 : Assert(vcontained.type == jbvBinary);
1107 :
1108 88 : nestval = JsonbIteratorInit(lhsVal->val.binary.data);
1109 88 : nestContained = JsonbIteratorInit(vcontained.val.binary.data);
1110 :
1111 : /*
1112 : * Match "value" side of rhs datum object's pair recursively.
1113 : * It's a nested structure.
1114 : *
1115 : * Note that nesting still has to "match up" at the right
1116 : * nesting sub-levels. However, there need only be zero or
1117 : * more matching pairs (or elements) at each nesting level
1118 : * (provided the *rhs* pairs/elements *all* match on each
1119 : * level), which enables searching nested structures for a
1120 : * single String or other primitive type sub-datum quite
1121 : * effectively (provided the user constructed the rhs nested
1122 : * structure such that we "know where to look").
1123 : *
1124 : * In other words, the mapping of container nodes in the rhs
1125 : * "vcontained" Jsonb to internal nodes on the lhs is
1126 : * injective, and parent-child edges on the rhs must be mapped
1127 : * to parent-child edges on the lhs to satisfy the condition
1128 : * of containment (plus of course the mapped nodes must be
1129 : * equal).
1130 : */
1131 88 : if (!JsonbDeepContains(&nestval, &nestContained))
1132 24 : return false;
1133 : }
1134 : }
1135 : }
1136 240 : else if (rcont == WJB_BEGIN_ARRAY)
1137 : {
1138 240 : JsonbValue *lhsConts = NULL;
1139 240 : uint32 nLhsElems = vval.val.array.nElems;
1140 :
1141 : Assert(vval.type == jbvArray);
1142 : Assert(vcontained.type == jbvArray);
1143 :
1144 : /*
1145 : * Handle distinction between "raw scalar" pseudo arrays, and real
1146 : * arrays.
1147 : *
1148 : * A raw scalar may contain another raw scalar, and an array may
1149 : * contain a raw scalar, but a raw scalar may not contain an array. We
1150 : * don't do something like this for the object case, since objects can
1151 : * only contain pairs, never raw scalars (a pair is represented by an
1152 : * rhs object argument with a single contained pair).
1153 : */
1154 240 : if (vval.val.array.rawScalar && !vcontained.val.array.rawScalar)
1155 4 : return false;
1156 :
1157 : /* Work through rhs "is it contained within?" array */
1158 : for (;;)
1159 : {
1160 544 : rcont = JsonbIteratorNext(mContained, &vcontained, true);
1161 :
1162 : /*
1163 : * When we get through caller's rhs "is it contained within?"
1164 : * array without failing to find one of its values, it's
1165 : * contained.
1166 : */
1167 544 : if (rcont == WJB_END_ARRAY)
1168 192 : return true;
1169 :
1170 : Assert(rcont == WJB_ELEM);
1171 :
1172 352 : if (IsAJsonbScalar(&vcontained))
1173 : {
1174 268 : if (!findJsonbValueFromContainer((*val)->container,
1175 : JB_FARRAY,
1176 : &vcontained))
1177 36 : return false;
1178 : }
1179 : else
1180 : {
1181 : uint32 i;
1182 :
1183 : /*
1184 : * If this is first container found in rhs array (at this
1185 : * depth), initialize temp lhs array of containers
1186 : */
1187 84 : if (lhsConts == NULL)
1188 : {
1189 80 : uint32 j = 0;
1190 :
1191 : /* Make room for all possible values */
1192 80 : lhsConts = palloc(sizeof(JsonbValue) * nLhsElems);
1193 :
1194 264 : for (i = 0; i < nLhsElems; i++)
1195 : {
1196 : /* Store all lhs elements in temp array */
1197 184 : rcont = JsonbIteratorNext(val, &vval, true);
1198 : Assert(rcont == WJB_ELEM);
1199 :
1200 184 : if (vval.type == jbvBinary)
1201 92 : lhsConts[j++] = vval;
1202 : }
1203 :
1204 : /* No container elements in temp array, so give up now */
1205 80 : if (j == 0)
1206 0 : return false;
1207 :
1208 : /* We may have only partially filled array */
1209 80 : nLhsElems = j;
1210 : }
1211 :
1212 : /* XXX: Nested array containment is O(N^2) */
1213 104 : for (i = 0; i < nLhsElems; i++)
1214 : {
1215 : /* Nested container value (object or array) */
1216 : JsonbIterator *nestval,
1217 : *nestContained;
1218 : bool contains;
1219 :
1220 96 : nestval = JsonbIteratorInit(lhsConts[i].val.binary.data);
1221 96 : nestContained = JsonbIteratorInit(vcontained.val.binary.data);
1222 :
1223 96 : contains = JsonbDeepContains(&nestval, &nestContained);
1224 :
1225 96 : if (nestval)
1226 96 : pfree(nestval);
1227 96 : if (nestContained)
1228 20 : pfree(nestContained);
1229 96 : if (contains)
1230 76 : break;
1231 : }
1232 :
1233 : /*
1234 : * Report rhs container value is not contained if couldn't
1235 : * match rhs container to *some* lhs cont
1236 : */
1237 84 : if (i == nLhsElems)
1238 8 : return false;
1239 : }
1240 : }
1241 : }
1242 : else
1243 : {
1244 0 : elog(ERROR, "invalid jsonb container type");
1245 : }
1246 :
1247 : elog(ERROR, "unexpectedly fell off end of jsonb container");
1248 : return false;
1249 : }
1250 :
1251 : /*
1252 : * Hash a JsonbValue scalar value, mixing the hash value into an existing
1253 : * hash provided by the caller.
1254 : *
1255 : * Some callers may wish to independently XOR in JB_FOBJECT and JB_FARRAY
1256 : * flags.
1257 : */
1258 : void
1259 115844 : JsonbHashScalarValue(const JsonbValue *scalarVal, uint32 *hash)
1260 : {
1261 : uint32 tmp;
1262 :
1263 : /* Compute hash value for scalarVal */
1264 115844 : switch (scalarVal->type)
1265 : {
1266 64 : case jbvNull:
1267 64 : tmp = 0x01;
1268 64 : break;
1269 84800 : case jbvString:
1270 84800 : tmp = DatumGetUInt32(hash_any((const unsigned char *) scalarVal->val.string.val,
1271 : scalarVal->val.string.len));
1272 84800 : break;
1273 19884 : case jbvNumeric:
1274 : /* Must hash equal numerics to equal hash codes */
1275 19884 : tmp = DatumGetUInt32(DirectFunctionCall1(hash_numeric,
1276 : NumericGetDatum(scalarVal->val.numeric)));
1277 19884 : break;
1278 11096 : case jbvBool:
1279 11096 : tmp = scalarVal->val.boolean ? 0x02 : 0x04;
1280 :
1281 11096 : break;
1282 0 : default:
1283 0 : elog(ERROR, "invalid jsonb scalar type");
1284 : tmp = 0; /* keep compiler quiet */
1285 : break;
1286 : }
1287 :
1288 : /*
1289 : * Combine hash values of successive keys, values and elements by rotating
1290 : * the previous value left 1 bit, then XOR'ing in the new
1291 : * key/value/element's hash value.
1292 : */
1293 115844 : *hash = (*hash << 1) | (*hash >> 31);
1294 115844 : *hash ^= tmp;
1295 115844 : }
1296 :
1297 : /*
1298 : * Hash a value to a 64-bit value, with a seed. Otherwise, similar to
1299 : * JsonbHashScalarValue.
1300 : */
1301 : void
1302 144 : JsonbHashScalarValueExtended(const JsonbValue *scalarVal, uint64 *hash,
1303 : uint64 seed)
1304 : {
1305 : uint64 tmp;
1306 :
1307 144 : switch (scalarVal->type)
1308 : {
1309 8 : case jbvNull:
1310 8 : tmp = seed + 0x01;
1311 8 : break;
1312 120 : case jbvString:
1313 120 : tmp = DatumGetUInt64(hash_any_extended((const unsigned char *) scalarVal->val.string.val,
1314 : scalarVal->val.string.len,
1315 : seed));
1316 120 : break;
1317 8 : case jbvNumeric:
1318 8 : tmp = DatumGetUInt64(DirectFunctionCall2(hash_numeric_extended,
1319 : NumericGetDatum(scalarVal->val.numeric),
1320 : UInt64GetDatum(seed)));
1321 8 : break;
1322 8 : case jbvBool:
1323 8 : if (seed)
1324 4 : tmp = DatumGetUInt64(DirectFunctionCall2(hashcharextended,
1325 : BoolGetDatum(scalarVal->val.boolean),
1326 : UInt64GetDatum(seed)));
1327 : else
1328 4 : tmp = scalarVal->val.boolean ? 0x02 : 0x04;
1329 :
1330 8 : break;
1331 0 : default:
1332 0 : elog(ERROR, "invalid jsonb scalar type");
1333 : break;
1334 : }
1335 :
1336 144 : *hash = ROTATE_HIGH_AND_LOW_32BITS(*hash);
1337 144 : *hash ^= tmp;
1338 144 : }
1339 :
1340 : /*
1341 : * Are two scalar JsonbValues of the same type a and b equal?
1342 : */
1343 : static bool
1344 2840 : equalsJsonbScalarValue(JsonbValue *aScalar, JsonbValue *bScalar)
1345 : {
1346 2840 : if (aScalar->type == bScalar->type)
1347 : {
1348 2840 : switch (aScalar->type)
1349 : {
1350 28 : case jbvNull:
1351 28 : return true;
1352 2392 : case jbvString:
1353 2392 : return lengthCompareJsonbStringValue(aScalar, bScalar) == 0;
1354 372 : case jbvNumeric:
1355 372 : return DatumGetBool(DirectFunctionCall2(numeric_eq,
1356 : PointerGetDatum(aScalar->val.numeric),
1357 : PointerGetDatum(bScalar->val.numeric)));
1358 48 : case jbvBool:
1359 48 : return aScalar->val.boolean == bScalar->val.boolean;
1360 :
1361 0 : default:
1362 0 : elog(ERROR, "invalid jsonb scalar type");
1363 : }
1364 : }
1365 0 : elog(ERROR, "jsonb scalar type mismatch");
1366 : return false;
1367 : }
1368 :
1369 : /*
1370 : * Compare two scalar JsonbValues, returning -1, 0, or 1.
1371 : *
1372 : * Strings are compared using the default collation. Used by B-tree
1373 : * operators, where a lexical sort order is generally expected.
1374 : */
1375 : static int
1376 357016 : compareJsonbScalarValue(JsonbValue *aScalar, JsonbValue *bScalar)
1377 : {
1378 357016 : if (aScalar->type == bScalar->type)
1379 : {
1380 357016 : switch (aScalar->type)
1381 : {
1382 12 : case jbvNull:
1383 12 : return 0;
1384 242828 : case jbvString:
1385 242828 : return varstr_cmp(aScalar->val.string.val,
1386 : aScalar->val.string.len,
1387 242828 : bScalar->val.string.val,
1388 : bScalar->val.string.len,
1389 : DEFAULT_COLLATION_OID);
1390 86072 : case jbvNumeric:
1391 86072 : return DatumGetInt32(DirectFunctionCall2(numeric_cmp,
1392 : PointerGetDatum(aScalar->val.numeric),
1393 : PointerGetDatum(bScalar->val.numeric)));
1394 28104 : case jbvBool:
1395 28104 : if (aScalar->val.boolean == bScalar->val.boolean)
1396 24880 : return 0;
1397 3224 : else if (aScalar->val.boolean > bScalar->val.boolean)
1398 1940 : return 1;
1399 : else
1400 1284 : return -1;
1401 0 : default:
1402 0 : elog(ERROR, "invalid jsonb scalar type");
1403 : }
1404 : }
1405 0 : elog(ERROR, "jsonb scalar type mismatch");
1406 : return -1;
1407 : }
1408 :
1409 :
1410 : /*
1411 : * Functions for manipulating the resizable buffer used by convertJsonb and
1412 : * its subroutines.
1413 : */
1414 :
1415 : /*
1416 : * Reserve 'len' bytes, at the end of the buffer, enlarging it if necessary.
1417 : * Returns the offset to the reserved area. The caller is expected to fill
1418 : * the reserved area later with copyToBuffer().
1419 : */
1420 : static int
1421 389370 : reserveFromBuffer(StringInfo buffer, int len)
1422 : {
1423 : int offset;
1424 :
1425 : /* Make more room if needed */
1426 389370 : enlargeStringInfo(buffer, len);
1427 :
1428 : /* remember current offset */
1429 389370 : offset = buffer->len;
1430 :
1431 : /* reserve the space */
1432 389370 : buffer->len += len;
1433 :
1434 : /*
1435 : * Keep a trailing null in place, even though it's not useful for us; it
1436 : * seems best to preserve the invariants of StringInfos.
1437 : */
1438 389370 : buffer->data[buffer->len] = '\0';
1439 :
1440 389370 : return offset;
1441 : }
1442 :
1443 : /*
1444 : * Copy 'len' bytes to a previously reserved area in buffer.
1445 : */
1446 : static void
1447 297202 : copyToBuffer(StringInfo buffer, int offset, const char *data, int len)
1448 : {
1449 297202 : memcpy(buffer->data + offset, data, len);
1450 297202 : }
1451 :
1452 : /*
1453 : * A shorthand for reserveFromBuffer + copyToBuffer.
1454 : */
1455 : static void
1456 169378 : appendToBuffer(StringInfo buffer, const char *data, int len)
1457 : {
1458 : int offset;
1459 :
1460 169378 : offset = reserveFromBuffer(buffer, len);
1461 169378 : copyToBuffer(buffer, offset, data, len);
1462 169378 : }
1463 :
1464 :
1465 : /*
1466 : * Append padding, so that the length of the StringInfo is int-aligned.
1467 : * Returns the number of padding bytes appended.
1468 : */
1469 : static short
1470 97292 : padBufferToInt(StringInfo buffer)
1471 : {
1472 : int padlen,
1473 : p,
1474 : offset;
1475 :
1476 97292 : padlen = INTALIGN(buffer->len) - buffer->len;
1477 :
1478 97292 : offset = reserveFromBuffer(buffer, padlen);
1479 :
1480 : /* padlen must be small, so this is probably faster than a memset */
1481 124396 : for (p = 0; p < padlen; p++)
1482 27104 : buffer->data[offset + p] = '\0';
1483 :
1484 97292 : return padlen;
1485 : }
1486 :
1487 : /*
1488 : * Given a JsonbValue, convert to Jsonb. The result is palloc'd.
1489 : */
1490 : static Jsonb *
1491 57884 : convertToJsonb(JsonbValue *val)
1492 : {
1493 : StringInfoData buffer;
1494 : JEntry jentry;
1495 : Jsonb *res;
1496 :
1497 : /* Should not already have binary representation */
1498 : Assert(val->type != jbvBinary);
1499 :
1500 : /* Allocate an output buffer. It will be enlarged as needed */
1501 57884 : initStringInfo(&buffer);
1502 :
1503 : /* Make room for the varlena header */
1504 57884 : reserveFromBuffer(&buffer, VARHDRSZ);
1505 :
1506 57884 : convertJsonbValue(&buffer, &jentry, val, 0);
1507 :
1508 : /*
1509 : * Note: the JEntry of the root is discarded. Therefore the root
1510 : * JsonbContainer struct must contain enough information to tell what kind
1511 : * of value it is.
1512 : */
1513 :
1514 57884 : res = (Jsonb *) buffer.data;
1515 :
1516 57884 : SET_VARSIZE(res, buffer.len);
1517 :
1518 57884 : return res;
1519 : }
1520 :
1521 : /*
1522 : * Subroutine of convertJsonb: serialize a single JsonbValue into buffer.
1523 : *
1524 : * The JEntry header for this node is returned in *header. It is filled in
1525 : * with the length of this value and appropriate type bits. If we wish to
1526 : * store an end offset rather than a length, it is the caller's responsibility
1527 : * to adjust for that.
1528 : *
1529 : * If the value is an array or an object, this recurses. 'level' is only used
1530 : * for debugging purposes.
1531 : */
1532 : static void
1533 150152 : convertJsonbValue(StringInfo buffer, JEntry *header, JsonbValue *val, int level)
1534 : {
1535 150152 : check_stack_depth();
1536 :
1537 150152 : if (!val)
1538 0 : return;
1539 :
1540 : /*
1541 : * A JsonbValue passed as val should never have a type of jbvBinary, and
1542 : * neither should any of its sub-components. Those values will be produced
1543 : * by convertJsonbArray and convertJsonbObject, the results of which will
1544 : * not be passed back to this function as an argument.
1545 : */
1546 :
1547 150152 : if (IsAJsonbScalar(val))
1548 85336 : convertJsonbScalar(buffer, header, val);
1549 64816 : else if (val->type == jbvArray)
1550 49786 : convertJsonbArray(buffer, header, val, level);
1551 15030 : else if (val->type == jbvObject)
1552 15030 : convertJsonbObject(buffer, header, val, level);
1553 : else
1554 0 : elog(ERROR, "unknown type of jsonb container to convert");
1555 : }
1556 :
1557 : static void
1558 49786 : convertJsonbArray(StringInfo buffer, JEntry *pheader, JsonbValue *val, int level)
1559 : {
1560 : int base_offset;
1561 : int jentry_offset;
1562 : int i;
1563 : int totallen;
1564 : uint32 header;
1565 49786 : int nElems = val->val.array.nElems;
1566 :
1567 : /* Remember where in the buffer this array starts. */
1568 49786 : base_offset = buffer->len;
1569 :
1570 : /* Align to 4-byte boundary (any padding counts as part of my data) */
1571 49786 : padBufferToInt(buffer);
1572 :
1573 : /*
1574 : * Construct the header Jentry and store it in the beginning of the
1575 : * variable-length payload.
1576 : */
1577 49786 : header = nElems | JB_FARRAY;
1578 49786 : if (val->val.array.rawScalar)
1579 : {
1580 : Assert(nElems == 1);
1581 : Assert(level == 0);
1582 44468 : header |= JB_FSCALAR;
1583 : }
1584 :
1585 49786 : appendToBuffer(buffer, (char *) &header, sizeof(uint32));
1586 :
1587 : /* Reserve space for the JEntries of the elements. */
1588 49786 : jentry_offset = reserveFromBuffer(buffer, sizeof(JEntry) * nElems);
1589 :
1590 49786 : totallen = 0;
1591 106498 : for (i = 0; i < nElems; i++)
1592 : {
1593 56712 : JsonbValue *elem = &val->val.array.elems[i];
1594 : int len;
1595 : JEntry meta;
1596 :
1597 : /*
1598 : * Convert element, producing a JEntry and appending its
1599 : * variable-length data to buffer
1600 : */
1601 56712 : convertJsonbValue(buffer, &meta, elem, level + 1);
1602 :
1603 56712 : len = JBE_OFFLENFLD(meta);
1604 56712 : totallen += len;
1605 :
1606 : /*
1607 : * Bail out if total variable-length data exceeds what will fit in a
1608 : * JEntry length field. We check this in each iteration, not just
1609 : * once at the end, to forestall possible integer overflow.
1610 : */
1611 56712 : if (totallen > JENTRY_OFFLENMASK)
1612 0 : ereport(ERROR,
1613 : (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
1614 : errmsg("total size of jsonb array elements exceeds the maximum of %u bytes",
1615 : JENTRY_OFFLENMASK)));
1616 :
1617 : /*
1618 : * Convert each JB_OFFSET_STRIDE'th length to an offset.
1619 : */
1620 56712 : if ((i % JB_OFFSET_STRIDE) == 0)
1621 49314 : meta = (meta & JENTRY_TYPEMASK) | totallen | JENTRY_HAS_OFF;
1622 :
1623 56712 : copyToBuffer(buffer, jentry_offset, (char *) &meta, sizeof(JEntry));
1624 56712 : jentry_offset += sizeof(JEntry);
1625 : }
1626 :
1627 : /* Total data size is everything we've appended to buffer */
1628 49786 : totallen = buffer->len - base_offset;
1629 :
1630 : /* Check length again, since we didn't include the metadata above */
1631 49786 : if (totallen > JENTRY_OFFLENMASK)
1632 0 : ereport(ERROR,
1633 : (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
1634 : errmsg("total size of jsonb array elements exceeds the maximum of %u bytes",
1635 : JENTRY_OFFLENMASK)));
1636 :
1637 : /* Initialize the header of this node in the container's JEntry array */
1638 49786 : *pheader = JENTRY_ISCONTAINER | totallen;
1639 49786 : }
1640 :
1641 : static void
1642 15030 : convertJsonbObject(StringInfo buffer, JEntry *pheader, JsonbValue *val, int level)
1643 : {
1644 : int base_offset;
1645 : int jentry_offset;
1646 : int i;
1647 : int totallen;
1648 : uint32 header;
1649 15030 : int nPairs = val->val.object.nPairs;
1650 :
1651 : /* Remember where in the buffer this object starts. */
1652 15030 : base_offset = buffer->len;
1653 :
1654 : /* Align to 4-byte boundary (any padding counts as part of my data) */
1655 15030 : padBufferToInt(buffer);
1656 :
1657 : /*
1658 : * Construct the header Jentry and store it in the beginning of the
1659 : * variable-length payload.
1660 : */
1661 15030 : header = nPairs | JB_FOBJECT;
1662 15030 : appendToBuffer(buffer, (char *) &header, sizeof(uint32));
1663 :
1664 : /* Reserve space for the JEntries of the keys and values. */
1665 15030 : jentry_offset = reserveFromBuffer(buffer, sizeof(JEntry) * nPairs * 2);
1666 :
1667 : /*
1668 : * Iterate over the keys, then over the values, since that is the ordering
1669 : * we want in the on-disk representation.
1670 : */
1671 15030 : totallen = 0;
1672 50586 : for (i = 0; i < nPairs; i++)
1673 : {
1674 35556 : JsonbPair *pair = &val->val.object.pairs[i];
1675 : int len;
1676 : JEntry meta;
1677 :
1678 : /*
1679 : * Convert key, producing a JEntry and appending its variable-length
1680 : * data to buffer
1681 : */
1682 35556 : convertJsonbScalar(buffer, &meta, &pair->key);
1683 :
1684 35556 : len = JBE_OFFLENFLD(meta);
1685 35556 : totallen += len;
1686 :
1687 : /*
1688 : * Bail out if total variable-length data exceeds what will fit in a
1689 : * JEntry length field. We check this in each iteration, not just
1690 : * once at the end, to forestall possible integer overflow.
1691 : */
1692 35556 : if (totallen > JENTRY_OFFLENMASK)
1693 0 : ereport(ERROR,
1694 : (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
1695 : errmsg("total size of jsonb object elements exceeds the maximum of %u bytes",
1696 : JENTRY_OFFLENMASK)));
1697 :
1698 : /*
1699 : * Convert each JB_OFFSET_STRIDE'th length to an offset.
1700 : */
1701 35556 : if ((i % JB_OFFSET_STRIDE) == 0)
1702 10346 : meta = (meta & JENTRY_TYPEMASK) | totallen | JENTRY_HAS_OFF;
1703 :
1704 35556 : copyToBuffer(buffer, jentry_offset, (char *) &meta, sizeof(JEntry));
1705 35556 : jentry_offset += sizeof(JEntry);
1706 : }
1707 50586 : for (i = 0; i < nPairs; i++)
1708 : {
1709 35556 : JsonbPair *pair = &val->val.object.pairs[i];
1710 : int len;
1711 : JEntry meta;
1712 :
1713 : /*
1714 : * Convert value, producing a JEntry and appending its variable-length
1715 : * data to buffer
1716 : */
1717 35556 : convertJsonbValue(buffer, &meta, &pair->value, level + 1);
1718 :
1719 35556 : len = JBE_OFFLENFLD(meta);
1720 35556 : totallen += len;
1721 :
1722 : /*
1723 : * Bail out if total variable-length data exceeds what will fit in a
1724 : * JEntry length field. We check this in each iteration, not just
1725 : * once at the end, to forestall possible integer overflow.
1726 : */
1727 35556 : if (totallen > JENTRY_OFFLENMASK)
1728 0 : ereport(ERROR,
1729 : (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
1730 : errmsg("total size of jsonb object elements exceeds the maximum of %u bytes",
1731 : JENTRY_OFFLENMASK)));
1732 :
1733 : /*
1734 : * Convert each JB_OFFSET_STRIDE'th length to an offset.
1735 : */
1736 35556 : if (((i + nPairs) % JB_OFFSET_STRIDE) == 0)
1737 92 : meta = (meta & JENTRY_TYPEMASK) | totallen | JENTRY_HAS_OFF;
1738 :
1739 35556 : copyToBuffer(buffer, jentry_offset, (char *) &meta, sizeof(JEntry));
1740 35556 : jentry_offset += sizeof(JEntry);
1741 : }
1742 :
1743 : /* Total data size is everything we've appended to buffer */
1744 15030 : totallen = buffer->len - base_offset;
1745 :
1746 : /* Check length again, since we didn't include the metadata above */
1747 15030 : if (totallen > JENTRY_OFFLENMASK)
1748 0 : ereport(ERROR,
1749 : (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
1750 : errmsg("total size of jsonb object elements exceeds the maximum of %u bytes",
1751 : JENTRY_OFFLENMASK)));
1752 :
1753 : /* Initialize the header of this node in the container's JEntry array */
1754 15030 : *pheader = JENTRY_ISCONTAINER | totallen;
1755 15030 : }
1756 :
1757 : static void
1758 120892 : convertJsonbScalar(StringInfo buffer, JEntry *jentry, JsonbValue *scalarVal)
1759 : {
1760 : int numlen;
1761 : short padlen;
1762 :
1763 120892 : switch (scalarVal->type)
1764 : {
1765 1328 : case jbvNull:
1766 1328 : *jentry = JENTRY_ISNULL;
1767 1328 : break;
1768 :
1769 71770 : case jbvString:
1770 71770 : appendToBuffer(buffer, scalarVal->val.string.val, scalarVal->val.string.len);
1771 :
1772 71770 : *jentry = scalarVal->val.string.len;
1773 71770 : break;
1774 :
1775 32476 : case jbvNumeric:
1776 32476 : numlen = VARSIZE_ANY(scalarVal->val.numeric);
1777 32476 : padlen = padBufferToInt(buffer);
1778 :
1779 32476 : appendToBuffer(buffer, (char *) scalarVal->val.numeric, numlen);
1780 :
1781 32476 : *jentry = JENTRY_ISNUMERIC | (padlen + numlen);
1782 32476 : break;
1783 :
1784 15002 : case jbvBool:
1785 30004 : *jentry = (scalarVal->val.boolean) ?
1786 15002 : JENTRY_ISBOOL_TRUE : JENTRY_ISBOOL_FALSE;
1787 15002 : break;
1788 :
1789 316 : case jbvDatetime:
1790 316 : {
1791 : char buf[MAXDATELEN + 1];
1792 : size_t len;
1793 :
1794 316 : JsonEncodeDateTime(buf,
1795 : scalarVal->val.datetime.value,
1796 : scalarVal->val.datetime.typid,
1797 316 : &scalarVal->val.datetime.tz);
1798 316 : len = strlen(buf);
1799 316 : appendToBuffer(buffer, buf, len);
1800 :
1801 316 : *jentry = len;
1802 : }
1803 316 : break;
1804 :
1805 0 : default:
1806 0 : elog(ERROR, "invalid jsonb scalar type");
1807 : }
1808 120892 : }
1809 :
1810 : /*
1811 : * Compare two jbvString JsonbValue values, a and b.
1812 : *
1813 : * This is a special qsort() comparator used to sort strings in certain
1814 : * internal contexts where it is sufficient to have a well-defined sort order.
1815 : * In particular, object pair keys are sorted according to this criteria to
1816 : * facilitate cheap binary searches where we don't care about lexical sort
1817 : * order.
1818 : *
1819 : * a and b are first sorted based on their length. If a tie-breaker is
1820 : * required, only then do we consider string binary equality.
1821 : */
1822 : static int
1823 53772 : lengthCompareJsonbStringValue(const void *a, const void *b)
1824 : {
1825 53772 : const JsonbValue *va = (const JsonbValue *) a;
1826 53772 : const JsonbValue *vb = (const JsonbValue *) b;
1827 :
1828 : Assert(va->type == jbvString);
1829 : Assert(vb->type == jbvString);
1830 :
1831 161316 : return lengthCompareJsonbString(va->val.string.val, va->val.string.len,
1832 53772 : vb->val.string.val, vb->val.string.len);
1833 : }
1834 :
1835 : /*
1836 : * Subroutine for lengthCompareJsonbStringValue
1837 : *
1838 : * This is also useful separately to implement binary search on
1839 : * JsonbContainers.
1840 : */
1841 : static int
1842 552970 : lengthCompareJsonbString(const char *val1, int len1, const char *val2, int len2)
1843 : {
1844 552970 : if (len1 == len2)
1845 172278 : return memcmp(val1, val2, len1);
1846 : else
1847 380692 : return len1 > len2 ? 1 : -1;
1848 : }
1849 :
1850 : /*
1851 : * qsort_arg() comparator to compare JsonbPair values.
1852 : *
1853 : * Third argument 'binequal' may point to a bool. If it's set, *binequal is set
1854 : * to true iff a and b have full binary equality, since some callers have an
1855 : * interest in whether the two values are equal or merely equivalent.
1856 : *
1857 : * N.B: String comparisons here are "length-wise"
1858 : *
1859 : * Pairs with equals keys are ordered such that the order field is respected.
1860 : */
1861 : static int
1862 51340 : lengthCompareJsonbPair(const void *a, const void *b, void *binequal)
1863 : {
1864 51340 : const JsonbPair *pa = (const JsonbPair *) a;
1865 51340 : const JsonbPair *pb = (const JsonbPair *) b;
1866 : int res;
1867 :
1868 51340 : res = lengthCompareJsonbStringValue(&pa->key, &pb->key);
1869 51340 : if (res == 0 && binequal)
1870 16 : *((bool *) binequal) = true;
1871 :
1872 : /*
1873 : * Guarantee keeping order of equal pair. Unique algorithm will prefer
1874 : * first element as value.
1875 : */
1876 51340 : if (res == 0)
1877 16 : res = (pa->order > pb->order) ? -1 : 1;
1878 :
1879 51340 : return res;
1880 : }
1881 :
1882 : /*
1883 : * Sort and unique-ify pairs in JsonbValue object
1884 : */
1885 : static void
1886 15038 : uniqueifyJsonbObject(JsonbValue *object)
1887 : {
1888 15038 : bool hasNonUniq = false;
1889 :
1890 : Assert(object->type == jbvObject);
1891 :
1892 15038 : if (object->val.object.nPairs > 1)
1893 6768 : qsort_arg(object->val.object.pairs, object->val.object.nPairs, sizeof(JsonbPair),
1894 : lengthCompareJsonbPair, &hasNonUniq);
1895 :
1896 15038 : if (hasNonUniq)
1897 : {
1898 12 : JsonbPair *ptr = object->val.object.pairs + 1,
1899 12 : *res = object->val.object.pairs;
1900 :
1901 52 : while (ptr - object->val.object.pairs < object->val.object.nPairs)
1902 : {
1903 : /* Avoid copying over duplicate */
1904 40 : if (lengthCompareJsonbStringValue(ptr, res) != 0)
1905 : {
1906 24 : res++;
1907 24 : if (ptr != res)
1908 20 : memcpy(res, ptr, sizeof(JsonbPair));
1909 : }
1910 40 : ptr++;
1911 : }
1912 :
1913 12 : object->val.object.nPairs = res + 1 - object->val.object.pairs;
1914 : }
1915 15038 : }
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