src/rrtimeslice.c

   1 /*
   2  * PostRR - src/rrtimeslice.c
   3  * Copyright (C) 2012 Sebastian 'tokkee' Harl <sh@tokkee.org>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  17  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  18  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
  19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 /*
  29  * A PostgreSQL data-type providing a timeslice implementing round-robin
  30  * features.
  31  */
  32
  33 #include "postrr.h"
  34 #include "utils/pg_spi.h"
  35
  36 #include <string.h>
  37
  38 #include <postgres.h>
  39 #include <fmgr.h>
  40
  41 /* Postgres utilities */
  42 #include <access/hash.h>
  43 #include <executor/spi.h>
  44 #include <utils/array.h>
  45 #include <utils/datetime.h>
  46 #include <utils/timestamp.h>
  47 #include <miscadmin.h> /* DateStyle, IntervalStyle */
  48
  49 #ifdef HAVE_INT64_TIMESTAMP
  50 #       define TSTAMP_TO_INT64(t) (t)
  51 #       define INT64_TO_TSTAMP(i) (i)
  52 #else /* ! HAVE_INT64_TIMESTAMP */
  53 #       define TSTAMP_TO_INT64(t) (int64)((t) * (double)USECS_PER_SEC)
  54 #       define INT64_TO_TSTAMP(i) ((double)(i) / (double)USECS_PER_SEC)
  55 #endif
  56
  57 /*
  58  * data type
  59  */
  60
  61 struct rrtimeslice {
  62         TimestampTz tstamp;
  63         int32  tsid;
  64         uint32 seq;
  65 };
  66
  67 /*
  68  * internal helper functions
  69  */
  70
  71 static int32
  72 rrtimeslice_set_spec(int32 len, int32 num)
  73 {
  74         int spi_rc;
  75
  76         char  query[256];
  77         int32 typmod = 0;
  78
  79         if ((len <= 0) || (num <= 0))
  80                 ereport(ERROR, (
  81                                         errcode(ERRCODE_INVALID_PARAMETER_VALUE),
  82                                         errmsg("rrtimeslice(%i, %i) "
  83                                                 "length/num may not be less than zero",
  84                                                 len, num)
  85                                 ));
  86
  87         if ((spi_rc = SPI_connect()) != SPI_OK_CONNECT)
  88                 ereport(ERROR, (
  89                                         errmsg("failed to store rrtimeslice spec: "
  90                                                 "could not connect to SPI manager: %s",
  91                                                 SPI_result_code_string(spi_rc))
  92                                 ));
  93
  94         snprintf(query, sizeof(query),
  95                         "SELECT tsid FROM postrr.rrtimeslices "
  96                                 "WHERE tslen = %d AND tsnum = %d "
  97                                 "LIMIT 1", len, num);
  98         query[sizeof(query) - 1] = '\0';
  99
 100         spi_rc = pg_spi_get_int(query, 1, &typmod);
 101         if (spi_rc == PG_SPI_OK) {
 102                 SPI_finish();
 103                 return typmod;
 104         }
 105         else if (spi_rc != PG_SPI_ERROR_NO_VALUES)
 106                 pg_spi_ereport(ERROR, "store rrtimeslice spec", spi_rc);
 107
 108         snprintf(query, sizeof(query),
 109                         "SELECT nextval('postrr.tsid'::regclass)");
 110         query[sizeof(query) - 1] = '\0';
 111
 112         spi_rc = pg_spi_get_int(query, 1, &typmod);
 113         if ((spi_rc != PG_SPI_OK) || (typmod <= 0))
 114                 pg_spi_ereport(ERROR, "retrieve nextval(postrr.tsid)", spi_rc);
 115
 116         snprintf(query, sizeof(query),
 117                         "INSERT INTO postrr.rrtimeslices(tsid, tslen, tsnum) "
 118                         "VALUES (%d, %d, %d)", typmod, len, num);
 119         query[sizeof(query) - 1] = '\0';
 120
 121         spi_rc = SPI_exec(query, /* max num rows = */ 1);
 122         if (spi_rc != SPI_OK_INSERT)
 123                 ereport(ERROR, (
 124                                         errmsg("failed to store rrtimeslice spec: "
 125                                                 "failed to execute query: %s",
 126                                                 SPI_result_code_string(spi_rc))
 127                                 ));
 128
 129         SPI_finish();
 130         return typmod;
 131 } /* rrtimeslice_set_spec */
 132
 133 static int
 134 rrtimeslice_get_spec(int32 typmod, int32 *len, int32 *num)
 135 {
 136         int spi_rc;
 137
 138         char query[256];
 139
 140         if (typmod <= 0)
 141                 return -1;
 142
 143         if ((spi_rc = SPI_connect()) != SPI_OK_CONNECT)
 144                 ereport(ERROR, (
 145                                         errmsg("failed to determine rrtimeslice spec: "
 146                                                 "could not connect to SPI manager: %s",
 147                                                 SPI_result_code_string(spi_rc))
 148                                 ));
 149
 150         snprintf(query, sizeof(query),
 151                         "SELECT tslen, tsnum FROM postrr.rrtimeslices "
 152                                 "WHERE tsid = %d", typmod);
 153         query[sizeof(query) - 1] = '\0';
 154
 155         spi_rc = pg_spi_get_int(query, 2, len, num);
 156         if (spi_rc != PG_SPI_OK)
 157                 pg_spi_ereport(ERROR, "determine rrtimeslice spec", spi_rc);
 158
 159         SPI_finish();
 160         return 0;
 161 } /* rrtimeslice_get_spec */
 162
 163 static int
 164 rrtimeslice_apply_typmod(rrtimeslice_t *tslice, int32 typmod)
 165 {
 166         int64 tstamp;
 167         int64 length;
 168         int64 seq;
 169
 170         int32 len = 0;
 171         int32 num = 0;
 172
 173         if (rrtimeslice_get_spec(typmod, &len, &num))
 174                 return -1;
 175
 176         if ((len <= 0) || (num <= 0))
 177                 ereport(ERROR, (
 178                                         errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 179                                         errmsg("rrtimeslice(%i, %i) "
 180                                                 "length/num may not be less than zero",
 181                                                 len, num)
 182                                 ));
 183
 184         tstamp = TSTAMP_TO_INT64(tslice->tstamp);
 185
 186         length = len * USECS_PER_SEC;
 187         if (tstamp % length != 0)
 188                 tstamp = tstamp - (tstamp % length) + length;
 189         seq    = tstamp % (length * num) / length;
 190         seq    = seq % num;
 191
 192         tslice->tstamp = INT64_TO_TSTAMP(tstamp);
 193         tslice->tsid   = typmod;
 194         tslice->seq    = (uint32)seq;
 195         return 0;
 196 } /* rrtimeslice_apply_typmod */
 197
 198 /*
 199  * prototypes for PostgreSQL functions
 200  */
 201
 202 PG_FUNCTION_INFO_V1(rrtimeslice_validate);
 203
 204 PG_FUNCTION_INFO_V1(rrtimeslice_in);
 205 PG_FUNCTION_INFO_V1(rrtimeslice_out);
 206 PG_FUNCTION_INFO_V1(rrtimeslice_typmodin);
 207 PG_FUNCTION_INFO_V1(rrtimeslice_typmodout);
 208
 209 PG_FUNCTION_INFO_V1(rrtimeslice_to_rrtimeslice);
 210 PG_FUNCTION_INFO_V1(rrtimeslice_to_timestamptz);
 211
 212 PG_FUNCTION_INFO_V1(rrtimeslice_seq_eq);
 213 PG_FUNCTION_INFO_V1(rrtimeslice_seq_ne);
 214 PG_FUNCTION_INFO_V1(rrtimeslice_seq_lt);
 215 PG_FUNCTION_INFO_V1(rrtimeslice_seq_gt);
 216 PG_FUNCTION_INFO_V1(rrtimeslice_seq_le);
 217 PG_FUNCTION_INFO_V1(rrtimeslice_seq_ge);
 218 PG_FUNCTION_INFO_V1(rrtimeslice_seq_cmp);
 219 PG_FUNCTION_INFO_V1(rrtimeslice_seq_hash);
 220
 221 /*
 222  * public API
 223  */
 224
 225 Datum
 226 rrtimeslice_validate(PG_FUNCTION_ARGS)
 227 {
 228         char   type_info[1024];
 229         char  *result;
 230         size_t req_len;
 231         size_t len;
 232
 233         if (PG_NARGS() != 1)
 234                 ereport(ERROR, (
 235                                         errmsg("rrtimeslice_validate() expect one argument"),
 236                                         errhint("Usage rrtimeslice_validate(expected_size)")
 237                                 ));
 238
 239         req_len = (size_t)PG_GETARG_UINT32(0);
 240         len = sizeof(rrtimeslice_t);
 241
 242         if (req_len != len)
 243                 ereport(ERROR, (
 244                                         errmsg("length of the rrtimeslice type "
 245                                                 "does not match the expected length"),
 246                                         errhint("Please report a bug against PostRR")
 247                                 ));
 248
 249         snprintf(type_info, sizeof(type_info),
 250                         "rrtimeslice validated successfully; type length = %zu", len);
 251         type_info[sizeof(type_info) - 1] = '\0';
 252
 253         result = pstrdup(type_info);
 254         PG_RETURN_CSTRING(result);
 255 } /* rrtimeslice_validate */
 256
 257 Datum
 258 rrtimeslice_in(PG_FUNCTION_ARGS)
 259 {
 260         rrtimeslice_t *tslice;
 261
 262         TimestampTz tstamp = 0;
 263         int32 typmod;
 264
 265         struct pg_tm tm;
 266         fsec_t fsec = 0;
 267         int tz = 0;
 268
 269         char *time_str;
 270         int   pg_dt_err;
 271         char  buf[MAXDATELEN + MAXDATEFIELDS];
 272         char *field[MAXDATEFIELDS];
 273         int   ftype[MAXDATEFIELDS];
 274         int   num_fields = 0;
 275         int   dtype = 0;
 276
 277         if (PG_NARGS() != 3)
 278                 ereport(ERROR, (
 279                                         errmsg("rrtimeslice_in() expects three arguments"),
 280                                         errhint("Usage: rrtimeslice_in(col_name, oid, typmod)")
 281                                 ));
 282
 283         tslice   = (rrtimeslice_t *)palloc0(sizeof(*tslice));
 284         time_str = PG_GETARG_CSTRING(0);
 285         typmod   = PG_GETARG_INT32(2);
 286
 287         pg_dt_err = ParseDateTime(time_str, buf, sizeof(buf),
 288                         field, ftype, MAXDATEFIELDS, &num_fields);
 289
 290         if (! pg_dt_err)
 291                 pg_dt_err = DecodeDateTime(field, ftype, num_fields,
 292                                 &dtype, &tm, &fsec, &tz);
 293         if (pg_dt_err)
 294                 DateTimeParseError(pg_dt_err, time_str, "rrtimeslice");
 295
 296         switch (dtype) {
 297                 case DTK_DATE:
 298                         if (tm2timestamp(&tm, fsec, &tz, &tstamp))
 299                                 ereport(ERROR, (
 300                                                         errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
 301                                                         errmsg("timestamp out of range: %s", time_str)
 302                                                 ));
 303                         break;
 304
 305                 case DTK_EPOCH:
 306                         tstamp = SetEpochTimestamp();
 307                         break;
 308
 309                 default:
 310                         ereport(ERROR, (
 311                                                 errmsg("unexpected dtype %d while "
 312                                                         "parsing rrtimeslice: %s", dtype, time_str)
 313                                         ));
 314         }
 315
 316         tslice->tstamp = tstamp;
 317
 318         /* most likely, this won't happen … coerce_type
 319          * (src/backend/parser/parse_coerce.c) does not pass that information to
 320          * the input function but rather lets a length conversion cast do that
 321          * work */
 322         if (typmod > 0)
 323                 rrtimeslice_apply_typmod(tslice, typmod);
 324
 325         PG_RETURN_RRTIMESLICE_P(tslice);
 326 } /* rrtimeslice_in */
 327
 328 Datum
 329 rrtimeslice_out(PG_FUNCTION_ARGS)
 330 {
 331         rrtimeslice_t *tslice;
 332
 333         Interval interval;
 334
 335         struct pg_tm tm;
 336         fsec_t fsec = 0;
 337         int tz = 0;
 338
 339         char *tz_str = NULL;
 340
 341         char  ts_str[MAXDATELEN + 1];
 342         char  buf_ts[MAXDATELEN + 1];
 343         char  buf_l[MAXDATELEN + 1];
 344         char *result;
 345
 346         int32 len = 0;
 347         int32 num = 0;
 348
 349         if (PG_NARGS() != 1)
 350                 ereport(ERROR, (
 351                                         errmsg("rrtimeslice_out() expects one argument"),
 352                                         errhint("Usage: rrtimeslice_out(rrtimeslice)")
 353                                 ));
 354
 355         tslice = PG_GETARG_RRTIMESLICE_P(0);
 356
 357         if (TIMESTAMP_NOT_FINITE(tslice->tstamp)
 358                         || (timestamp2tm(tslice->tstamp, &tz, &tm, &fsec, &tz_str, NULL) != 0))
 359                 ereport(ERROR, (
 360                                         errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
 361                                         errmsg("invalid (non-finite) timestamp")
 362                                 ));
 363         else
 364                 EncodeDateTime(&tm, fsec, &tz, &tz_str, DateStyle, buf_ts);
 365
 366         if (! rrtimeslice_get_spec(tslice->tsid, &len, &num)) {
 367                 memset(&interval, 0, sizeof(interval));
 368                 interval.time = len * USECS_PER_SEC;
 369                 fsec = 0;
 370
 371                 if (interval2tm(interval, &tm, &fsec))
 372                         ereport(ERROR, (
 373                                                 errmsg("could not convert interval to tm")
 374                                         ));
 375         }
 376         else {
 377                 strncpy(buf_l, "ERR", sizeof(buf_l));
 378                 buf_l[sizeof(buf_l) - 1] = '\0';
 379         }
 380
 381         EncodeInterval(&tm, fsec, IntervalStyle, buf_l);
 382
 383         snprintf(ts_str, sizeof(ts_str), "%s -%s (#%i)",
 384                         buf_ts, buf_l, tslice->seq);
 385
 386         result = pstrdup(ts_str);
 387         PG_RETURN_CSTRING(result);
 388 } /* rrtimeslice_out */
 389
 390 Datum
 391 rrtimeslice_typmodin(PG_FUNCTION_ARGS)
 392 {
 393         ArrayType *tm_array;
 394
 395         int32 *spec;
 396         int    spec_elems = 0;
 397         int32  typmod;
 398
 399         if (PG_NARGS() != 1)
 400                 ereport(ERROR, (
 401                                         errmsg("rrtimeslice_typmodin() expects one argument"),
 402                                         errhint("Usage: rrtimeslice_typmodin(array)")
 403                                 ));
 404
 405         tm_array = PG_GETARG_ARRAYTYPE_P(0);
 406
 407         spec = ArrayGetIntegerTypmods(tm_array, &spec_elems);
 408         if (spec_elems != 2)
 409                 ereport(ERROR, (
 410                                         errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 411                                         errmsg("invalid rrtimeslice type modifier"),
 412                                         errhint("Usage: rrtimeslice(<slice_len>, <num>)")
 413                                 ));
 414
 415         typmod = rrtimeslice_set_spec(spec[0], spec[1]);
 416         PG_RETURN_INT32(typmod);
 417 } /* rrtimeslice_typmodin */
 418
 419 Datum
 420 rrtimeslice_typmodout(PG_FUNCTION_ARGS)
 421 {
 422         int32 typmod;
 423         char  tm_str[1024];
 424         char *result;
 425
 426         int32 len = 0;
 427         int32 num = 0;
 428
 429         if (PG_NARGS() != 1)
 430                 ereport(ERROR, (
 431                                         errmsg("rrtimeslice_typmodout() expects one argument"),
 432                                         errhint("Usage: rrtimeslice_typmodout(typmod)")
 433                                 ));
 434
 435         typmod = PG_GETARG_INT32(0);
 436         if (rrtimeslice_get_spec(typmod, &len, &num))
 437                 tm_str[0] = '\0';
 438         else if ((len <= 0) || (num <= 0))
 439                 snprintf(tm_str, sizeof(tm_str), "(#ERR, #ERR)");
 440         else
 441                 snprintf(tm_str, sizeof(tm_str), "(%d, %d)", len, num);
 442
 443         result = pstrdup(tm_str);
 444         PG_RETURN_CSTRING(result);
 445 } /* rrtimeslice_typmodout */
 446
 447 Datum
 448 rrtimeslice_to_rrtimeslice(PG_FUNCTION_ARGS)
 449 {
 450         rrtimeslice_t *tslice;
 451         int32 typmod;
 452
 453         if (PG_NARGS() != 3)
 454                 ereport(ERROR, (
 455                                         errmsg("rrtimeslice_to_rrtimeslice() "
 456                                                 "expects three arguments"),
 457                                         errhint("Usage: rrtimeslice_to_rrtimeslice"
 458                                                 "(rrtimeslice, typmod, is_explicit)")
 459                                 ));
 460
 461         tslice = PG_GETARG_RRTIMESLICE_P(0);
 462         typmod = PG_GETARG_INT32(1);
 463
 464         if (typmod > 0) {
 465                 if ((! tslice->tsid) && (! tslice->seq))
 466                         rrtimeslice_apply_typmod(tslice, typmod);
 467                 else
 468                         ereport(ERROR, (
 469                                                 errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 470                                                 errmsg("invalid cast: cannot cast rrtimeslices "
 471                                                         "with different typmod (yet)")
 472                                         ));
 473         }
 474
 475         PG_RETURN_RRTIMESLICE_P(tslice);
 476 } /* rrtimeslice_to_rrtimeslice */
 477
 478 Datum
 479 rrtimeslice_to_timestamptz(PG_FUNCTION_ARGS)
 480 {
 481         rrtimeslice_t *tslice;
 482
 483         if (PG_NARGS() != 1)
 484                 ereport(ERROR, (
 485                                         errmsg("rrtimeslice_to_timestamptz() "
 486                                                 "expects one argument"),
 487                                         errhint("Usage: rrtimeslice_to_timestamptz"
 488                                                 "(rrtimeslice)")
 489                                 ));
 490
 491         tslice = PG_GETARG_RRTIMESLICE_P(0);
 492         PG_RETURN_TIMESTAMPTZ(tslice->tstamp);
 493 } /* rrtimeslice_to_timestamptz */
 494
 495 int
 496 rrtimeslice_seq_cmp_internal(rrtimeslice_t *ts1, rrtimeslice_t *ts2)
 497 {
 498         if ((! ts1) && (! ts2))
 499                 return 0;
 500         else if (! ts1)
 501                 return -1;
 502         else if (! ts2)
 503                 return 1;
 504
 505         if (ts1->tsid && (! ts2->tsid))
 506                 rrtimeslice_apply_typmod(ts2, ts1->tsid);
 507         else if ((! ts1->tsid) && ts2->tsid)
 508                 rrtimeslice_apply_typmod(ts1, ts2->tsid);
 509
 510         if (ts1->tsid != ts2->tsid) /* XXX: compare len/num */
 511                 ereport(ERROR, (
 512                                         errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 513                                         errmsg("invalid comparison: cannot compare "
 514                                                 "rrtimeslices with different typmods (yet)")
 515                                 ));
 516
 517         if (ts1->seq < ts2->seq)
 518                 return -1;
 519         else if (ts1->seq == ts2->seq)
 520                 return 0;
 521         else
 522                 return 1;
 523 } /* rrtimeslice_seq_cmp_internal */
 524
 525 Datum
 526 rrtimeslice_seq_eq(PG_FUNCTION_ARGS)
 527 {
 528         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 529         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 530
 531         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) == 0);
 532 } /* rrtimeslice_seq_eq */
 533
 534 Datum
 535 rrtimeslice_seq_ne(PG_FUNCTION_ARGS)
 536 {
 537         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 538         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 539
 540         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) != 0);
 541 } /* rrtimeslice_seq_ne */
 542
 543 Datum
 544 rrtimeslice_seq_lt(PG_FUNCTION_ARGS)
 545 {
 546         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 547         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 548
 549         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) < 0);
 550 } /* rrtimeslice_seq_lt */
 551
 552 Datum
 553 rrtimeslice_seq_le(PG_FUNCTION_ARGS)
 554 {
 555         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 556         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 557
 558         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) <= 0);
 559 } /* rrtimeslice_seq_le */
 560
 561 Datum
 562 rrtimeslice_seq_gt(PG_FUNCTION_ARGS)
 563 {
 564         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 565         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 566
 567         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) > 0);
 568 } /* rrtimeslice_seq_gt */
 569
 570 Datum
 571 rrtimeslice_seq_ge(PG_FUNCTION_ARGS)
 572 {
 573         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 574         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 575
 576         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) >= 0);
 577 } /* rrtimeslice_seq_ge */
 578
 579 Datum
 580 rrtimeslice_seq_cmp(PG_FUNCTION_ARGS)
 581 {
 582         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 583         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 584
 585         PG_RETURN_INT32(rrtimeslice_seq_cmp_internal(ts1, ts2));
 586 } /* rrtimeslice_seq_ge */
 587
 588 Datum
 589 rrtimeslice_seq_hash(PG_FUNCTION_ARGS)
 590 {
 591         rrtimeslice_t *ts = PG_GETARG_RRTIMESLICE_P(0);
 592         return hash_uint32(ts->seq);
 593 } /* rrtimeslice_seq_hash */
 594
 595 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 596