Line data Source code
1 : /*
2 : * contrib/btree_gist/btree_ts.c
3 : */
4 : #include "postgres.h"
5 :
6 : #include <limits.h>
7 :
8 : #include "btree_gist.h"
9 : #include "btree_utils_num.h"
10 : #include "utils/fmgrprotos.h"
11 : #include "utils/timestamp.h"
12 : #include "utils/float.h"
13 : #include "utils/rel.h"
14 : #include "utils/sortsupport.h"
15 :
16 : typedef struct
17 : {
18 : Timestamp lower;
19 : Timestamp upper;
20 : } tsKEY;
21 :
22 : /* GiST support functions */
23 0 : PG_FUNCTION_INFO_V1(gbt_ts_compress);
24 0 : PG_FUNCTION_INFO_V1(gbt_tstz_compress);
25 0 : PG_FUNCTION_INFO_V1(gbt_ts_fetch);
26 0 : PG_FUNCTION_INFO_V1(gbt_ts_union);
27 0 : PG_FUNCTION_INFO_V1(gbt_ts_picksplit);
28 0 : PG_FUNCTION_INFO_V1(gbt_ts_consistent);
29 0 : PG_FUNCTION_INFO_V1(gbt_ts_distance);
30 0 : PG_FUNCTION_INFO_V1(gbt_tstz_consistent);
31 0 : PG_FUNCTION_INFO_V1(gbt_tstz_distance);
32 0 : PG_FUNCTION_INFO_V1(gbt_ts_penalty);
33 0 : PG_FUNCTION_INFO_V1(gbt_ts_same);
34 0 : PG_FUNCTION_INFO_V1(gbt_ts_sortsupport);
35 :
36 :
37 : /* define for comparison */
38 :
39 : static bool
40 0 : gbt_tsgt(const void *a, const void *b, FmgrInfo *flinfo)
41 : {
42 0 : const Timestamp *aa = (const Timestamp *) a;
43 0 : const Timestamp *bb = (const Timestamp *) b;
44 :
45 0 : return DatumGetBool(DirectFunctionCall2(timestamp_gt,
46 : TimestampGetDatum(*aa),
47 : TimestampGetDatum(*bb)));
48 0 : }
49 :
50 : static bool
51 0 : gbt_tsge(const void *a, const void *b, FmgrInfo *flinfo)
52 : {
53 0 : const Timestamp *aa = (const Timestamp *) a;
54 0 : const Timestamp *bb = (const Timestamp *) b;
55 :
56 0 : return DatumGetBool(DirectFunctionCall2(timestamp_ge,
57 : TimestampGetDatum(*aa),
58 : TimestampGetDatum(*bb)));
59 0 : }
60 :
61 : static bool
62 0 : gbt_tseq(const void *a, const void *b, FmgrInfo *flinfo)
63 : {
64 0 : const Timestamp *aa = (const Timestamp *) a;
65 0 : const Timestamp *bb = (const Timestamp *) b;
66 :
67 0 : return DatumGetBool(DirectFunctionCall2(timestamp_eq,
68 : TimestampGetDatum(*aa),
69 : TimestampGetDatum(*bb)));
70 0 : }
71 :
72 : static bool
73 0 : gbt_tsle(const void *a, const void *b, FmgrInfo *flinfo)
74 : {
75 0 : const Timestamp *aa = (const Timestamp *) a;
76 0 : const Timestamp *bb = (const Timestamp *) b;
77 :
78 0 : return DatumGetBool(DirectFunctionCall2(timestamp_le,
79 : TimestampGetDatum(*aa),
80 : TimestampGetDatum(*bb)));
81 0 : }
82 :
83 : static bool
84 0 : gbt_tslt(const void *a, const void *b, FmgrInfo *flinfo)
85 : {
86 0 : const Timestamp *aa = (const Timestamp *) a;
87 0 : const Timestamp *bb = (const Timestamp *) b;
88 :
89 0 : return DatumGetBool(DirectFunctionCall2(timestamp_lt,
90 : TimestampGetDatum(*aa),
91 : TimestampGetDatum(*bb)));
92 0 : }
93 :
94 : static int
95 0 : gbt_tskey_cmp(const void *a, const void *b, FmgrInfo *flinfo)
96 : {
97 0 : tsKEY *ia = (tsKEY *) (((const Nsrt *) a)->t);
98 0 : tsKEY *ib = (tsKEY *) (((const Nsrt *) b)->t);
99 0 : int res;
100 :
101 0 : res = DatumGetInt32(DirectFunctionCall2(timestamp_cmp, TimestampGetDatum(ia->lower), TimestampGetDatum(ib->lower)));
102 0 : if (res == 0)
103 0 : return DatumGetInt32(DirectFunctionCall2(timestamp_cmp, TimestampGetDatum(ia->upper), TimestampGetDatum(ib->upper)));
104 :
105 0 : return res;
106 0 : }
107 :
108 : static float8
109 0 : gbt_ts_dist(const void *a, const void *b, FmgrInfo *flinfo)
110 : {
111 0 : const Timestamp *aa = (const Timestamp *) a;
112 0 : const Timestamp *bb = (const Timestamp *) b;
113 0 : Interval *i;
114 :
115 0 : if (TIMESTAMP_NOT_FINITE(*aa) || TIMESTAMP_NOT_FINITE(*bb))
116 0 : return get_float8_infinity();
117 :
118 0 : i = DatumGetIntervalP(DirectFunctionCall2(timestamp_mi,
119 : TimestampGetDatum(*aa),
120 : TimestampGetDatum(*bb)));
121 0 : return fabs(INTERVAL_TO_SEC(i));
122 0 : }
123 :
124 : static const gbtree_ninfo tinfo =
125 : {
126 : gbt_t_ts,
127 : sizeof(Timestamp),
128 : 16, /* sizeof(gbtreekey16) */
129 : gbt_tsgt,
130 : gbt_tsge,
131 : gbt_tseq,
132 : gbt_tsle,
133 : gbt_tslt,
134 : gbt_tskey_cmp,
135 : gbt_ts_dist
136 : };
137 :
138 :
139 0 : PG_FUNCTION_INFO_V1(ts_dist);
140 : Datum
141 0 : ts_dist(PG_FUNCTION_ARGS)
142 : {
143 0 : Timestamp a = PG_GETARG_TIMESTAMP(0);
144 0 : Timestamp b = PG_GETARG_TIMESTAMP(1);
145 0 : Interval *r;
146 :
147 0 : if (TIMESTAMP_NOT_FINITE(a) || TIMESTAMP_NOT_FINITE(b))
148 : {
149 0 : Interval *p = palloc_object(Interval);
150 :
151 0 : p->day = INT_MAX;
152 0 : p->month = INT_MAX;
153 0 : p->time = PG_INT64_MAX;
154 0 : PG_RETURN_INTERVAL_P(p);
155 0 : }
156 : else
157 0 : r = DatumGetIntervalP(DirectFunctionCall2(timestamp_mi,
158 : PG_GETARG_DATUM(0),
159 : PG_GETARG_DATUM(1)));
160 0 : PG_RETURN_INTERVAL_P(abs_interval(r));
161 0 : }
162 :
163 0 : PG_FUNCTION_INFO_V1(tstz_dist);
164 : Datum
165 0 : tstz_dist(PG_FUNCTION_ARGS)
166 : {
167 0 : TimestampTz a = PG_GETARG_TIMESTAMPTZ(0);
168 0 : TimestampTz b = PG_GETARG_TIMESTAMPTZ(1);
169 0 : Interval *r;
170 :
171 0 : if (TIMESTAMP_NOT_FINITE(a) || TIMESTAMP_NOT_FINITE(b))
172 : {
173 0 : Interval *p = palloc_object(Interval);
174 :
175 0 : p->day = INT_MAX;
176 0 : p->month = INT_MAX;
177 0 : p->time = PG_INT64_MAX;
178 0 : PG_RETURN_INTERVAL_P(p);
179 0 : }
180 :
181 0 : r = DatumGetIntervalP(DirectFunctionCall2(timestamp_mi,
182 : PG_GETARG_DATUM(0),
183 : PG_GETARG_DATUM(1)));
184 0 : PG_RETURN_INTERVAL_P(abs_interval(r));
185 0 : }
186 :
187 : /**************************************************
188 : * GiST support functions
189 : **************************************************/
190 :
191 : static inline Timestamp
192 0 : tstz_to_ts_gmt(TimestampTz ts)
193 : {
194 : /* No timezone correction is needed, since GMT is offset 0 by definition */
195 0 : return (Timestamp) ts;
196 : }
197 :
198 :
199 : Datum
200 0 : gbt_ts_compress(PG_FUNCTION_ARGS)
201 : {
202 0 : GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
203 :
204 0 : PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
205 0 : }
206 :
207 : Datum
208 0 : gbt_tstz_compress(PG_FUNCTION_ARGS)
209 : {
210 0 : GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
211 0 : GISTENTRY *retval;
212 :
213 0 : if (entry->leafkey)
214 : {
215 0 : tsKEY *r = palloc_object(tsKEY);
216 0 : TimestampTz ts = DatumGetTimestampTz(entry->key);
217 0 : Timestamp gmt;
218 :
219 0 : gmt = tstz_to_ts_gmt(ts);
220 :
221 0 : retval = palloc_object(GISTENTRY);
222 0 : r->lower = r->upper = gmt;
223 0 : gistentryinit(*retval, PointerGetDatum(r),
224 : entry->rel, entry->page,
225 : entry->offset, false);
226 0 : }
227 : else
228 0 : retval = entry;
229 :
230 0 : PG_RETURN_POINTER(retval);
231 0 : }
232 :
233 : Datum
234 0 : gbt_ts_fetch(PG_FUNCTION_ARGS)
235 : {
236 0 : GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
237 :
238 0 : PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
239 0 : }
240 :
241 : Datum
242 0 : gbt_ts_consistent(PG_FUNCTION_ARGS)
243 : {
244 0 : GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
245 0 : Timestamp query = PG_GETARG_TIMESTAMP(1);
246 0 : StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
247 : #ifdef NOT_USED
248 : Oid subtype = PG_GETARG_OID(3);
249 : #endif
250 0 : bool *recheck = (bool *) PG_GETARG_POINTER(4);
251 0 : tsKEY *kkk = (tsKEY *) DatumGetPointer(entry->key);
252 0 : GBT_NUMKEY_R key;
253 :
254 : /* All cases served by this function are exact */
255 0 : *recheck = false;
256 :
257 0 : key.lower = (GBT_NUMKEY *) &kkk->lower;
258 0 : key.upper = (GBT_NUMKEY *) &kkk->upper;
259 :
260 0 : PG_RETURN_BOOL(gbt_num_consistent(&key, &query, &strategy,
261 : GIST_LEAF(entry), &tinfo, fcinfo->flinfo));
262 0 : }
263 :
264 : Datum
265 0 : gbt_ts_distance(PG_FUNCTION_ARGS)
266 : {
267 0 : GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
268 0 : Timestamp query = PG_GETARG_TIMESTAMP(1);
269 : #ifdef NOT_USED
270 : Oid subtype = PG_GETARG_OID(3);
271 : #endif
272 0 : tsKEY *kkk = (tsKEY *) DatumGetPointer(entry->key);
273 0 : GBT_NUMKEY_R key;
274 :
275 0 : key.lower = (GBT_NUMKEY *) &kkk->lower;
276 0 : key.upper = (GBT_NUMKEY *) &kkk->upper;
277 :
278 0 : PG_RETURN_FLOAT8(gbt_num_distance(&key, &query, GIST_LEAF(entry),
279 : &tinfo, fcinfo->flinfo));
280 0 : }
281 :
282 : Datum
283 0 : gbt_tstz_consistent(PG_FUNCTION_ARGS)
284 : {
285 0 : GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
286 0 : TimestampTz query = PG_GETARG_TIMESTAMPTZ(1);
287 0 : StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
288 : #ifdef NOT_USED
289 : Oid subtype = PG_GETARG_OID(3);
290 : #endif
291 0 : bool *recheck = (bool *) PG_GETARG_POINTER(4);
292 0 : char *kkk = (char *) DatumGetPointer(entry->key);
293 0 : GBT_NUMKEY_R key;
294 0 : Timestamp qqq;
295 :
296 : /* All cases served by this function are exact */
297 0 : *recheck = false;
298 :
299 0 : key.lower = (GBT_NUMKEY *) &kkk[0];
300 0 : key.upper = (GBT_NUMKEY *) &kkk[MAXALIGN(tinfo.size)];
301 0 : qqq = tstz_to_ts_gmt(query);
302 :
303 0 : PG_RETURN_BOOL(gbt_num_consistent(&key, &qqq, &strategy,
304 : GIST_LEAF(entry), &tinfo, fcinfo->flinfo));
305 0 : }
306 :
307 : Datum
308 0 : gbt_tstz_distance(PG_FUNCTION_ARGS)
309 : {
310 0 : GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
311 0 : TimestampTz query = PG_GETARG_TIMESTAMPTZ(1);
312 : #ifdef NOT_USED
313 : Oid subtype = PG_GETARG_OID(3);
314 : #endif
315 0 : char *kkk = (char *) DatumGetPointer(entry->key);
316 0 : GBT_NUMKEY_R key;
317 0 : Timestamp qqq;
318 :
319 0 : key.lower = (GBT_NUMKEY *) &kkk[0];
320 0 : key.upper = (GBT_NUMKEY *) &kkk[MAXALIGN(tinfo.size)];
321 0 : qqq = tstz_to_ts_gmt(query);
322 :
323 0 : PG_RETURN_FLOAT8(gbt_num_distance(&key, &qqq, GIST_LEAF(entry),
324 : &tinfo, fcinfo->flinfo));
325 0 : }
326 :
327 :
328 : Datum
329 0 : gbt_ts_union(PG_FUNCTION_ARGS)
330 : {
331 0 : GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
332 0 : void *out = palloc(sizeof(tsKEY));
333 :
334 0 : *(int *) PG_GETARG_POINTER(1) = sizeof(tsKEY);
335 0 : PG_RETURN_POINTER(gbt_num_union(out, entryvec, &tinfo, fcinfo->flinfo));
336 0 : }
337 :
338 :
339 : #define penalty_check_max_float(val) \
340 : do { \
341 : if ( val > FLT_MAX ) \
342 : val = FLT_MAX; \
343 : if ( val < -FLT_MAX ) \
344 : val = -FLT_MAX; \
345 : } while (0)
346 :
347 :
348 : Datum
349 0 : gbt_ts_penalty(PG_FUNCTION_ARGS)
350 : {
351 0 : tsKEY *origentry = (tsKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
352 0 : tsKEY *newentry = (tsKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
353 0 : float *result = (float *) PG_GETARG_POINTER(2);
354 :
355 0 : double orgdbl[2],
356 : newdbl[2];
357 :
358 : /*
359 : * We are always using "double" timestamps here. Precision should be good
360 : * enough.
361 : */
362 0 : orgdbl[0] = ((double) origentry->lower);
363 0 : orgdbl[1] = ((double) origentry->upper);
364 0 : newdbl[0] = ((double) newentry->lower);
365 0 : newdbl[1] = ((double) newentry->upper);
366 :
367 0 : penalty_check_max_float(orgdbl[0]);
368 0 : penalty_check_max_float(orgdbl[1]);
369 0 : penalty_check_max_float(newdbl[0]);
370 0 : penalty_check_max_float(newdbl[1]);
371 :
372 0 : penalty_num(result, orgdbl[0], orgdbl[1], newdbl[0], newdbl[1]);
373 :
374 0 : PG_RETURN_POINTER(result);
375 0 : }
376 :
377 :
378 : Datum
379 0 : gbt_ts_picksplit(PG_FUNCTION_ARGS)
380 : {
381 0 : PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
382 : (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
383 : &tinfo, fcinfo->flinfo));
384 : }
385 :
386 : Datum
387 0 : gbt_ts_same(PG_FUNCTION_ARGS)
388 : {
389 0 : tsKEY *b1 = (tsKEY *) PG_GETARG_POINTER(0);
390 0 : tsKEY *b2 = (tsKEY *) PG_GETARG_POINTER(1);
391 0 : bool *result = (bool *) PG_GETARG_POINTER(2);
392 :
393 0 : *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
394 0 : PG_RETURN_POINTER(result);
395 0 : }
396 :
397 : static int
398 0 : gbt_ts_ssup_cmp(Datum x, Datum y, SortSupport ssup)
399 : {
400 0 : tsKEY *arg1 = (tsKEY *) DatumGetPointer(x);
401 0 : tsKEY *arg2 = (tsKEY *) DatumGetPointer(y);
402 :
403 : /* for leaf items we expect lower == upper, so only compare lower */
404 0 : return DatumGetInt32(DirectFunctionCall2(timestamp_cmp,
405 : TimestampGetDatum(arg1->lower),
406 : TimestampGetDatum(arg2->lower)));
407 0 : }
408 :
409 : Datum
410 0 : gbt_ts_sortsupport(PG_FUNCTION_ARGS)
411 : {
412 0 : SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
413 :
414 0 : ssup->comparator = gbt_ts_ssup_cmp;
415 0 : ssup->ssup_extra = NULL;
416 :
417 0 : PG_RETURN_VOID();
418 0 : }
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