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hashfuncs.c
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1 /*
2  * hashfuncs.c
3  * Functions to investigate the content of HASH indexes
4  *
5  * Copyright (c) 2017-2018, PostgreSQL Global Development Group
6  *
7  * IDENTIFICATION
8  * contrib/pageinspect/hashfuncs.c
9  */
10 
11 #include "postgres.h"
12 
13 #include "pageinspect.h"
14 
15 #include "access/hash.h"
16 #include "access/htup_details.h"
17 #include "catalog/pg_type.h"
18 #include "catalog/pg_am.h"
19 #include "funcapi.h"
20 #include "miscadmin.h"
21 #include "utils/builtins.h"
22 #include "utils/rel.h"
23 
29 
30 #define IS_HASH(r) ((r)->rd_rel->relam == HASH_AM_OID)
31 
32 /* ------------------------------------------------
33  * structure for single hash page statistics
34  * ------------------------------------------------
35  */
36 typedef struct HashPageStat
37 {
40  int page_size;
41  int free_size;
42 
43  /* opaque data */
49 } HashPageStat;
50 
51 
52 /*
53  * Verify that the given bytea contains a HASH page, or die in the attempt.
54  * A pointer to a palloc'd, properly aligned copy of the page is returned.
55  */
56 static Page
57 verify_hash_page(bytea *raw_page, int flags)
58 {
59  Page page = get_page_from_raw(raw_page);
60  int pagetype = LH_UNUSED_PAGE;
61 
62  /* Treat new pages as unused. */
63  if (!PageIsNew(page))
64  {
65  HashPageOpaque pageopaque;
66 
67  if (PageGetSpecialSize(page) != MAXALIGN(sizeof(HashPageOpaqueData)))
68  ereport(ERROR,
69  (errcode(ERRCODE_INDEX_CORRUPTED),
70  errmsg("index table contains corrupted page")));
71 
72  pageopaque = (HashPageOpaque) PageGetSpecialPointer(page);
73  if (pageopaque->hasho_page_id != HASHO_PAGE_ID)
74  ereport(ERROR,
75  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
76  errmsg("page is not a hash page"),
77  errdetail("Expected %08x, got %08x.",
78  HASHO_PAGE_ID, pageopaque->hasho_page_id)));
79 
80  pagetype = pageopaque->hasho_flag & LH_PAGE_TYPE;
81  }
82 
83  /* Check that page type is sane. */
84  if (pagetype != LH_OVERFLOW_PAGE && pagetype != LH_BUCKET_PAGE &&
85  pagetype != LH_BITMAP_PAGE && pagetype != LH_META_PAGE &&
86  pagetype != LH_UNUSED_PAGE)
87  ereport(ERROR,
88  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
89  errmsg("invalid hash page type %08x", pagetype)));
90 
91  /* If requested, verify page type. */
92  if (flags != 0 && (pagetype & flags) == 0)
93  {
94  switch (flags)
95  {
96  case LH_META_PAGE:
97  ereport(ERROR,
98  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
99  errmsg("page is not a hash meta page")));
100  break;
102  ereport(ERROR,
103  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
104  errmsg("page is not a hash bucket or overflow page")));
105  break;
106  case LH_OVERFLOW_PAGE:
107  ereport(ERROR,
108  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
109  errmsg("page is not a hash overflow page")));
110  break;
111  default:
112  elog(ERROR,
113  "hash page of type %08x not in mask %08x",
114  pagetype, flags);
115  break;
116  }
117  }
118 
119  /*
120  * If it is the metapage, also verify magic number and version.
121  */
122  if (pagetype == LH_META_PAGE)
123  {
124  HashMetaPage metap = HashPageGetMeta(page);
125 
126  if (metap->hashm_magic != HASH_MAGIC)
127  ereport(ERROR,
128  (errcode(ERRCODE_INDEX_CORRUPTED),
129  errmsg("invalid magic number for metadata"),
130  errdetail("Expected 0x%08x, got 0x%08x.",
131  HASH_MAGIC, metap->hashm_magic)));
132 
133  if (metap->hashm_version != HASH_VERSION)
134  ereport(ERROR,
135  (errcode(ERRCODE_INDEX_CORRUPTED),
136  errmsg("invalid version for metadata"),
137  errdetail("Expected %d, got %d",
138  HASH_VERSION, metap->hashm_version)));
139  }
140 
141  return page;
142 }
143 
144 /* -------------------------------------------------
145  * GetHashPageStatistics()
146  *
147  * Collect statistics of single hash page
148  * -------------------------------------------------
149  */
150 static void
152 {
153  OffsetNumber maxoff = PageGetMaxOffsetNumber(page);
155  int off;
156 
157  stat->dead_items = stat->live_items = 0;
158  stat->page_size = PageGetPageSize(page);
159 
160  /* hash page opaque data */
161  stat->hasho_prevblkno = opaque->hasho_prevblkno;
162  stat->hasho_nextblkno = opaque->hasho_nextblkno;
163  stat->hasho_bucket = opaque->hasho_bucket;
164  stat->hasho_flag = opaque->hasho_flag;
165  stat->hasho_page_id = opaque->hasho_page_id;
166 
167  /* count live and dead tuples, and free space */
168  for (off = FirstOffsetNumber; off <= maxoff; off++)
169  {
170  ItemId id = PageGetItemId(page, off);
171 
172  if (!ItemIdIsDead(id))
173  stat->live_items++;
174  else
175  stat->dead_items++;
176  }
177  stat->free_size = PageGetFreeSpace(page);
178 }
179 
180 /* ---------------------------------------------------
181  * hash_page_type()
182  *
183  * Usage: SELECT hash_page_type(get_raw_page('con_hash_index', 1));
184  * ---------------------------------------------------
185  */
186 Datum
188 {
189  bytea *raw_page = PG_GETARG_BYTEA_P(0);
190  Page page;
191  HashPageOpaque opaque;
192  int pagetype;
193  const char *type;
194 
195  if (!superuser())
196  ereport(ERROR,
197  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
198  (errmsg("must be superuser to use raw page functions"))));
199 
200  page = verify_hash_page(raw_page, 0);
201 
202  if (PageIsNew(page))
203  type = "unused";
204  else
205  {
206  opaque = (HashPageOpaque) PageGetSpecialPointer(page);
207 
208  /* page type (flags) */
209  pagetype = opaque->hasho_flag & LH_PAGE_TYPE;
210  if (pagetype == LH_META_PAGE)
211  type = "metapage";
212  else if (pagetype == LH_OVERFLOW_PAGE)
213  type = "overflow";
214  else if (pagetype == LH_BUCKET_PAGE)
215  type = "bucket";
216  else if (pagetype == LH_BITMAP_PAGE)
217  type = "bitmap";
218  else
219  type = "unused";
220  }
221 
223 }
224 
225 /* ---------------------------------------------------
226  * hash_page_stats()
227  *
228  * Usage: SELECT * FROM hash_page_stats(get_raw_page('con_hash_index', 1));
229  * ---------------------------------------------------
230  */
231 Datum
233 {
234  bytea *raw_page = PG_GETARG_BYTEA_P(0);
235  Page page;
236  int j;
237  Datum values[9];
238  bool nulls[9];
240  HeapTuple tuple;
242 
243  if (!superuser())
244  ereport(ERROR,
245  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
246  (errmsg("must be superuser to use raw page functions"))));
247 
249 
250  /* keep compiler quiet */
252  stat.hasho_flag = stat.hasho_page_id = stat.free_size = 0;
253 
254  GetHashPageStatistics(page, &stat);
255 
256  /* Build a tuple descriptor for our result type */
257  if (get_call_result_type(fcinfo, NULL, &tupleDesc) != TYPEFUNC_COMPOSITE)
258  elog(ERROR, "return type must be a row type");
259  tupleDesc = BlessTupleDesc(tupleDesc);
260 
261  MemSet(nulls, 0, sizeof(nulls));
262 
263  j = 0;
264  values[j++] = Int32GetDatum(stat.live_items);
265  values[j++] = Int32GetDatum(stat.dead_items);
266  values[j++] = Int32GetDatum(stat.page_size);
267  values[j++] = Int32GetDatum(stat.free_size);
268  values[j++] = Int64GetDatum((int64) stat.hasho_prevblkno);
269  values[j++] = Int64GetDatum((int64) stat.hasho_nextblkno);
270  values[j++] = Int64GetDatum((int64) stat.hasho_bucket);
271  values[j++] = Int32GetDatum((int32) stat.hasho_flag);
272  values[j++] = Int32GetDatum((int32) stat.hasho_page_id);
273 
274  tuple = heap_form_tuple(tupleDesc, values, nulls);
275 
277 }
278 
279 /*
280  * cross-call data structure for SRF
281  */
282 struct user_args
283 {
284  Page page;
285  OffsetNumber offset;
286 };
287 
288 /*-------------------------------------------------------
289  * hash_page_items()
290  *
291  * Get IndexTupleData set in a hash page
292  *
293  * Usage: SELECT * FROM hash_page_items(get_raw_page('con_hash_index', 1));
294  *-------------------------------------------------------
295  */
296 Datum
298 {
299  bytea *raw_page = PG_GETARG_BYTEA_P(0);
300  Page page;
301  Datum result;
302  Datum values[3];
303  bool nulls[3];
304  uint32 hashkey;
305  HeapTuple tuple;
306  FuncCallContext *fctx;
307  MemoryContext mctx;
308  struct user_args *uargs;
309 
310  if (!superuser())
311  ereport(ERROR,
312  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
313  (errmsg("must be superuser to use raw page functions"))));
314 
315  if (SRF_IS_FIRSTCALL())
316  {
318 
319  fctx = SRF_FIRSTCALL_INIT();
320 
322 
324 
325  uargs = palloc(sizeof(struct user_args));
326 
327  uargs->page = page;
328 
329  uargs->offset = FirstOffsetNumber;
330 
331  fctx->max_calls = PageGetMaxOffsetNumber(uargs->page);
332 
333  /* Build a tuple descriptor for our result type */
334  if (get_call_result_type(fcinfo, NULL, &tupleDesc) != TYPEFUNC_COMPOSITE)
335  elog(ERROR, "return type must be a row type");
336  tupleDesc = BlessTupleDesc(tupleDesc);
337 
338  fctx->attinmeta = TupleDescGetAttInMetadata(tupleDesc);
339 
340  fctx->user_fctx = uargs;
341 
342  MemoryContextSwitchTo(mctx);
343  }
344 
345  fctx = SRF_PERCALL_SETUP();
346  uargs = fctx->user_fctx;
347 
348  if (fctx->call_cntr < fctx->max_calls)
349  {
350  ItemId id;
351  IndexTuple itup;
352  int j;
353 
354  id = PageGetItemId(uargs->page, uargs->offset);
355 
356  if (!ItemIdIsValid(id))
357  elog(ERROR, "invalid ItemId");
358 
359  itup = (IndexTuple) PageGetItem(uargs->page, id);
360 
361  MemSet(nulls, 0, sizeof(nulls));
362 
363  j = 0;
364  values[j++] = Int32GetDatum((int32) uargs->offset);
365  values[j++] = PointerGetDatum(&itup->t_tid);
366 
367  hashkey = _hash_get_indextuple_hashkey(itup);
368  values[j] = Int64GetDatum((int64) hashkey);
369 
370  tuple = heap_form_tuple(fctx->attinmeta->tupdesc, values, nulls);
371  result = HeapTupleGetDatum(tuple);
372 
373  uargs->offset = uargs->offset + 1;
374 
375  SRF_RETURN_NEXT(fctx, result);
376  }
377  else
378  {
379  pfree(uargs);
380  SRF_RETURN_DONE(fctx);
381  }
382 }
383 
384 /* ------------------------------------------------
385  * hash_bitmap_info()
386  *
387  * Get bitmap information for a particular overflow page
388  *
389  * Usage: SELECT * FROM hash_bitmap_info('con_hash_index'::regclass, 5);
390  * ------------------------------------------------
391  */
392 Datum
394 {
395  Oid indexRelid = PG_GETARG_OID(0);
396  uint64 ovflblkno = PG_GETARG_INT64(1);
397  HashMetaPage metap;
398  Buffer metabuf,
399  mapbuf;
400  BlockNumber bitmapblkno;
401  Page mappage;
402  bool bit = false;
404  Relation indexRel;
405  uint32 ovflbitno;
406  int32 bitmappage,
407  bitmapbit;
408  HeapTuple tuple;
409  int i,
410  j;
411  Datum values[3];
412  bool nulls[3];
413  uint32 *freep;
414 
415  if (!superuser())
416  ereport(ERROR,
417  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
418  (errmsg("must be superuser to use raw page functions"))));
419 
420  indexRel = index_open(indexRelid, AccessShareLock);
421 
422  if (!IS_HASH(indexRel))
423  elog(ERROR, "relation \"%s\" is not a hash index",
424  RelationGetRelationName(indexRel));
425 
426  if (RELATION_IS_OTHER_TEMP(indexRel))
427  ereport(ERROR,
428  (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
429  errmsg("cannot access temporary tables of other sessions")));
430 
431  if (ovflblkno >= RelationGetNumberOfBlocks(indexRel))
432  ereport(ERROR,
433  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
434  errmsg("block number " UINT64_FORMAT " is out of range for relation \"%s\"",
435  ovflblkno, RelationGetRelationName(indexRel))));
436 
437  /* Read the metapage so we can determine which bitmap page to use */
438  metabuf = _hash_getbuf(indexRel, HASH_METAPAGE, HASH_READ, LH_META_PAGE);
439  metap = HashPageGetMeta(BufferGetPage(metabuf));
440 
441  /*
442  * Reject attempt to read the bit for a metapage or bitmap page; this is
443  * only meaningful for overflow pages.
444  */
445  if (ovflblkno == 0)
446  ereport(ERROR,
447  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
448  errmsg("invalid overflow block number %u",
449  (BlockNumber) ovflblkno)));
450  for (i = 0; i < metap->hashm_nmaps; i++)
451  if (metap->hashm_mapp[i] == ovflblkno)
452  ereport(ERROR,
453  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
454  errmsg("invalid overflow block number %u",
455  (BlockNumber) ovflblkno)));
456 
457  /*
458  * Identify overflow bit number. This will error out for primary bucket
459  * pages, and we've already rejected the metapage and bitmap pages above.
460  */
461  ovflbitno = _hash_ovflblkno_to_bitno(metap, (BlockNumber) ovflblkno);
462 
463  bitmappage = ovflbitno >> BMPG_SHIFT(metap);
464  bitmapbit = ovflbitno & BMPG_MASK(metap);
465 
466  if (bitmappage >= metap->hashm_nmaps)
467  ereport(ERROR,
468  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
469  errmsg("invalid overflow block number %u",
470  (BlockNumber) ovflblkno)));
471 
472  bitmapblkno = metap->hashm_mapp[bitmappage];
473 
474  _hash_relbuf(indexRel, metabuf);
475 
476  /* Check the status of bitmap bit for overflow page */
477  mapbuf = _hash_getbuf(indexRel, bitmapblkno, HASH_READ, LH_BITMAP_PAGE);
478  mappage = BufferGetPage(mapbuf);
479  freep = HashPageGetBitmap(mappage);
480 
481  bit = ISSET(freep, bitmapbit) != 0;
482 
483  _hash_relbuf(indexRel, mapbuf);
484  index_close(indexRel, AccessShareLock);
485 
486  /* Build a tuple descriptor for our result type */
487  if (get_call_result_type(fcinfo, NULL, &tupleDesc) != TYPEFUNC_COMPOSITE)
488  elog(ERROR, "return type must be a row type");
489  tupleDesc = BlessTupleDesc(tupleDesc);
490 
491  MemSet(nulls, 0, sizeof(nulls));
492 
493  j = 0;
494  values[j++] = Int64GetDatum((int64) bitmapblkno);
495  values[j++] = Int32GetDatum(bitmapbit);
496  values[j++] = BoolGetDatum(bit);
497 
498  tuple = heap_form_tuple(tupleDesc, values, nulls);
499 
501 }
502 
503 /* ------------------------------------------------
504  * hash_metapage_info()
505  *
506  * Get the meta-page information for a hash index
507  *
508  * Usage: SELECT * FROM hash_metapage_info(get_raw_page('con_hash_index', 0))
509  * ------------------------------------------------
510  */
511 Datum
513 {
514  bytea *raw_page = PG_GETARG_BYTEA_P(0);
515  Page page;
516  HashMetaPageData *metad;
518  HeapTuple tuple;
519  int i,
520  j;
521  Datum values[16];
522  bool nulls[16];
523  Datum spares[HASH_MAX_SPLITPOINTS];
524  Datum mapp[HASH_MAX_BITMAPS];
525 
526  if (!superuser())
527  ereport(ERROR,
528  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
529  (errmsg("must be superuser to use raw page functions"))));
530 
531  page = verify_hash_page(raw_page, LH_META_PAGE);
532 
533  /* Build a tuple descriptor for our result type */
534  if (get_call_result_type(fcinfo, NULL, &tupleDesc) != TYPEFUNC_COMPOSITE)
535  elog(ERROR, "return type must be a row type");
536  tupleDesc = BlessTupleDesc(tupleDesc);
537 
538  metad = HashPageGetMeta(page);
539 
540  MemSet(nulls, 0, sizeof(nulls));
541 
542  j = 0;
543  values[j++] = Int64GetDatum((int64) metad->hashm_magic);
544  values[j++] = Int64GetDatum((int64) metad->hashm_version);
545  values[j++] = Float8GetDatum(metad->hashm_ntuples);
546  values[j++] = Int32GetDatum((int32) metad->hashm_ffactor);
547  values[j++] = Int32GetDatum((int32) metad->hashm_bsize);
548  values[j++] = Int32GetDatum((int32) metad->hashm_bmsize);
549  values[j++] = Int32GetDatum((int32) metad->hashm_bmshift);
550  values[j++] = Int64GetDatum((int64) metad->hashm_maxbucket);
551  values[j++] = Int64GetDatum((int64) metad->hashm_highmask);
552  values[j++] = Int64GetDatum((int64) metad->hashm_lowmask);
553  values[j++] = Int64GetDatum((int64) metad->hashm_ovflpoint);
554  values[j++] = Int64GetDatum((int64) metad->hashm_firstfree);
555  values[j++] = Int64GetDatum((int64) metad->hashm_nmaps);
556  values[j++] = ObjectIdGetDatum((Oid) metad->hashm_procid);
557 
558  for (i = 0; i < HASH_MAX_SPLITPOINTS; i++)
559  spares[i] = Int64GetDatum((int64) metad->hashm_spares[i]);
560  values[j++] = PointerGetDatum(construct_array(spares,
561  HASH_MAX_SPLITPOINTS,
562  INT8OID,
563  8, FLOAT8PASSBYVAL, 'd'));
564 
565  for (i = 0; i < HASH_MAX_BITMAPS; i++)
566  mapp[i] = Int64GetDatum((int64) metad->hashm_mapp[i]);
567  values[j++] = PointerGetDatum(construct_array(mapp,
568  HASH_MAX_BITMAPS,
569  INT8OID,
570  8, FLOAT8PASSBYVAL, 'd'));
571 
572  tuple = heap_form_tuple(tupleDesc, values, nulls);
573 
575 }
uint64 call_cntr
Definition: funcapi.h:66
uint16 hashm_bmshift
Definition: hash.h:258
uint16 hasho_page_id
Definition: hash.h:93
static void GetHashPageStatistics(Page page, HashPageStat *stat)
Definition: hashfuncs.c:151
Datum hash_metapage_info(PG_FUNCTION_ARGS)
Definition: hashfuncs.c:512
int free_size
Definition: hashfuncs.c:41
#define HashPageGetBitmap(page)
Definition: hash.h:306
TypeFuncClass get_call_result_type(FunctionCallInfo fcinfo, Oid *resultTypeId, TupleDesc *resultTupleDesc)
Definition: funcapi.c:211
#define LH_BITMAP_PAGE
Definition: hash.h:66
RegProcedure hashm_procid
Definition: hash.h:266
#define LH_META_PAGE
Definition: hash.h:67
#define SRF_IS_FIRSTCALL()
Definition: funcapi.h:294
#define PointerGetDatum(X)
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ItemPointerData t_tid
Definition: itup.h:37
uint32 hashm_magic
Definition: hash.h:251
struct HashPageStat HashPageStat
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:109
uint16 hashm_ffactor
Definition: hash.h:254
ArrayType * construct_array(Datum *elems, int nelems, Oid elmtype, int elmlen, bool elmbyval, char elmalign)
Definition: arrayfuncs.c:3279
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Definition: hash.h:260
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Definition: lockdefs.h:36
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Definition: hashfuncs.c:40
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Definition: elog.c:575
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Definition: superuser.c:47
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Definition: c.h:908
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Definition: block.h:31
HeapTuple heap_form_tuple(TupleDesc tupleDescriptor, Datum *values, bool *isnull)
Definition: heaptuple.c:1074
Bucket hasho_bucket
Definition: hashfuncs.c:46
Buffer _hash_getbuf(Relation rel, BlockNumber blkno, int access, int flags)
Definition: hashpage.c:79
#define HASH_VERSION
Definition: hash.h:209
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Definition: postgres_ext.h:31
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Definition: itemid.h:112
uint32 hashm_lowmask
Definition: hash.h:261
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Definition: bufpage.h:353
#define SRF_PERCALL_SETUP()
Definition: funcapi.h:298
Size PageGetFreeSpace(Page page)
Definition: bufpage.c:578
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Definition: hashfuncs.c:39
signed int int32
Definition: c.h:313
Datum Float8GetDatum(float8 X)
Definition: fmgr.c:1901
#define HASH_MAX_SPLITPOINTS
Definition: hash.h:244
#define LH_UNUSED_PAGE
Definition: hash.h:63
uint16 OffsetNumber
Definition: off.h:24
#define HASH_MAGIC
Definition: hash.h:208
#define LH_PAGE_TYPE
Definition: hash.h:73
#define HASH_READ
Definition: hash.h:329
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Definition: funcapi.h:300
uint32 Bucket
Definition: hash.h:34
#define PG_GETARG_BYTEA_P(n)
Definition: fmgr.h:304
unsigned short uint16
Definition: c.h:324
void pfree(void *pointer)
Definition: mcxt.c:1031
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Definition: hash.h:89
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Definition: postgres.h:492
#define ERROR
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Definition: hashutil.c:299
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Definition: hashfuncs.c:393
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Definition: hash.h:252
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Definition: execTuples.c:1109
uint32 hashm_nmaps
Definition: hash.h:265
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Definition: hashfuncs.c:44
#define PG_GETARG_OID(n)
Definition: fmgr.h:245
#define BMPG_MASK(metap)
Definition: hash.h:304
#define FirstOffsetNumber
Definition: off.h:27
AttInMetadata * attinmeta
Definition: funcapi.h:100
IndexTupleData * IndexTuple
Definition: itup.h:53
int errdetail(const char *fmt,...)
Definition: elog.c:873
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Definition: funcapi.h:39
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Definition: bufpage.h:264
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Definition: rel.h:441
unsigned int uint32
Definition: c.h:325
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Definition: fmgr.c:1877
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Definition: hash.h:303
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Definition: bufmgr.h:160
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Definition: elog.h:122
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Definition: hashfuncs.c:232
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Definition: hash.h:324
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Definition: hashfuncs.c:38
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Definition: hash.h:235
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Definition: win32_port.h:266
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Definition: bufpage.h:231
uint32 hashm_ovflpoint
Definition: hash.h:262
uint16 hashm_bsize
Definition: hash.h:255
#define HASH_METAPAGE
Definition: hash.h:206
uintptr_t Datum
Definition: postgres.h:367
#define PG_RETURN_DATUM(x)
Definition: fmgr.h:318
double hashm_ntuples
Definition: hash.h:253
#define LH_OVERFLOW_PAGE
Definition: hash.h:64
AttInMetadata * TupleDescGetAttInMetadata(TupleDesc tupdesc)
Definition: execTuples.c:1146
uint32 hashm_firstfree
Definition: hash.h:264
uint32 hashm_spares[HASH_MAX_SPLITPOINTS]
Definition: hash.h:267
#define RelationGetNumberOfBlocks(reln)
Definition: bufmgr.h:199
Page page
Definition: btreefuncs.c:245
#define IS_HASH(r)
Definition: hashfuncs.c:30
uint16 hasho_page_id
Definition: hashfuncs.c:48
PG_FUNCTION_INFO_V1(hash_page_type)
#define BoolGetDatum(X)
Definition: postgres.h:387
Datum hash_page_items(PG_FUNCTION_ARGS)
Definition: hashfuncs.c:297
void _hash_relbuf(Relation rel, Buffer buf)
Definition: hashpage.c:275
#define ItemIdIsValid(itemId)
Definition: itemid.h:85
#define LH_BUCKET_PAGE
Definition: hash.h:65
#define PG_RETURN_TEXT_P(x)
Definition: fmgr.h:336
text * cstring_to_text(const char *s)
Definition: varlena.c:149
Datum bit(PG_FUNCTION_ARGS)
Definition: varbit.c:362
Page get_page_from_raw(bytea *raw_page)
Definition: rawpage.c:187
#define RELATION_IS_OTHER_TEMP(relation)
Definition: rel.h:538
Bucket hasho_bucket
Definition: hash.h:91
MemoryContext multi_call_memory_ctx
Definition: funcapi.h:110
#define PageGetSpecialPointer(page)
Definition: bufpage.h:322
#define InvalidBlockNumber
Definition: block.h:33
HashPageOpaqueData * HashPageOpaque
Definition: hash.h:96
#define HASHO_PAGE_ID
Definition: hash.h:109
#define MAXALIGN(LEN)
Definition: c.h:652
#define HeapTupleGetDatum(tuple)
Definition: funcapi.h:231
#define PageGetSpecialSize(page)
Definition: bufpage.h:296
uint32 _hash_ovflblkno_to_bitno(HashMetaPage metap, BlockNumber ovflblkno)
Definition: hashovfl.c:61
uint32 hashm_maxbucket
Definition: hash.h:259
void index_close(Relation relation, LOCKMODE lockmode)
Definition: indexam.c:176
uint16 hasho_flag
Definition: hash.h:92
static Datum values[MAXATTR]
Definition: bootstrap.c:164
#define Int32GetDatum(X)
Definition: postgres.h:464
void * user_fctx
Definition: funcapi.h:91
#define PageIsNew(page)
Definition: bufpage.h:225
#define HashPageGetMeta(page)
Definition: hash.h:313
void * palloc(Size size)
Definition: mcxt.c:924
int errmsg(const char *fmt,...)
Definition: elog.c:797
int i
BlockNumber hasho_nextblkno
Definition: hash.h:90
uint16 hashm_bmsize
Definition: hash.h:256
Definition: c.h:516
#define PG_FUNCTION_ARGS
Definition: fmgr.h:163
uint16 hasho_flag
Definition: hashfuncs.c:47
#define elog
Definition: elog.h:219
static Page verify_hash_page(bytea *raw_page, int flags)
Definition: hashfuncs.c:57
#define PG_GETARG_INT64(n)
Definition: fmgr.h:252
BlockNumber hashm_mapp[HASH_MAX_BITMAPS]
Definition: hash.h:269
int Buffer
Definition: buf.h:23
Datum hash_page_type(PG_FUNCTION_ARGS)
Definition: hashfuncs.c:187
BlockNumber hasho_nextblkno
Definition: hashfuncs.c:45
#define UINT64_FORMAT
Definition: c.h:368
Relation index_open(Oid relationId, LOCKMODE lockmode)
Definition: indexam.c:150
uint64 max_calls
Definition: funcapi.h:75
#define PageGetItem(page, itemId)
Definition: bufpage.h:336
Pointer Page
Definition: bufpage.h:74
#define SRF_RETURN_DONE(_funcctx)
Definition: funcapi.h:318
#define SRF_FIRSTCALL_INIT()
Definition: funcapi.h:296