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 */
  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  * rrtimeslice_cmp_unify:
 200  * Unify two RRTimeslices in order to prepare them for comparison. That is, if
 201  * either one of the arguments does not have any typmod applied, then apply
 202  * the typmod of the other argument. Throws an error if the typmods don't
 203  * match.
 204  *
 205  * Returns:
 206  *  - 0 if the arguments could be unified
 207  *  - 1 if only the first argument is NULL
 208  *  - 2 if both arguments are NULL
 209  *  - 3 if only the second argument is NULL
 210  */
 211 static int
 212 rrtimeslice_cmp_unify(rrtimeslice_t *ts1, rrtimeslice_t *ts2)
 213 {
 214         if ((! ts1) && (! ts2))
 215                 return 0;
 216         else if (! ts1)
 217                 return -1;
 218         else if (! ts2)
 219                 return 1;
 220
 221         if (ts1->tsid && (! ts2->tsid))
 222                 rrtimeslice_apply_typmod(ts2, ts1->tsid);
 223         else if ((! ts1->tsid) && ts2->tsid)
 224                 rrtimeslice_apply_typmod(ts1, ts2->tsid);
 225
 226         if (ts1->tsid != ts2->tsid) /* XXX: compare len/num */
 227                 ereport(ERROR, (
 228                                         errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 229                                         errmsg("invalid comparison: cannot compare "
 230                                                 "rrtimeslices with different typmods (yet)")
 231                                 ));
 232         return 0;
 233 } /* rrtimeslice_cmp_unify */
 234
 235 /*
 236  * prototypes for PostgreSQL functions
 237  */
 238
 239 PG_FUNCTION_INFO_V1(rrtimeslice_validate);
 240
 241 PG_FUNCTION_INFO_V1(rrtimeslice_in);
 242 PG_FUNCTION_INFO_V1(rrtimeslice_out);
 243 PG_FUNCTION_INFO_V1(rrtimeslice_typmodin);
 244 PG_FUNCTION_INFO_V1(rrtimeslice_typmodout);
 245
 246 PG_FUNCTION_INFO_V1(rrtimeslice_to_rrtimeslice);
 247 PG_FUNCTION_INFO_V1(rrtimeslice_to_timestamptz);
 248
 249 PG_FUNCTION_INFO_V1(rrtimeslice_cmp);
 250
 251 PG_FUNCTION_INFO_V1(rrtimeslice_seq_eq);
 252 PG_FUNCTION_INFO_V1(rrtimeslice_seq_ne);
 253 PG_FUNCTION_INFO_V1(rrtimeslice_seq_lt);
 254 PG_FUNCTION_INFO_V1(rrtimeslice_seq_gt);
 255 PG_FUNCTION_INFO_V1(rrtimeslice_seq_le);
 256 PG_FUNCTION_INFO_V1(rrtimeslice_seq_ge);
 257 PG_FUNCTION_INFO_V1(rrtimeslice_seq_cmp);
 258 PG_FUNCTION_INFO_V1(rrtimeslice_seq_hash);
 259
 260 /*
 261  * public API
 262  */
 263
 264 Datum
 265 rrtimeslice_validate(PG_FUNCTION_ARGS)
 266 {
 267         char   type_info[1024];
 268         char  *result;
 269         size_t req_len;
 270         size_t len;
 271
 272         if (PG_NARGS() != 1)
 273                 ereport(ERROR, (
 274                                         errmsg("rrtimeslice_validate() expect one argument"),
 275                                         errhint("Usage rrtimeslice_validate(expected_size)")
 276                                 ));
 277
 278         req_len = (size_t)PG_GETARG_UINT32(0);
 279         len = sizeof(rrtimeslice_t);
 280
 281         if (req_len != len)
 282                 ereport(ERROR, (
 283                                         errmsg("length of the rrtimeslice type "
 284                                                 "does not match the expected length"),
 285                                         errhint("Please report a bug against PostRR")
 286                                 ));
 287
 288         snprintf(type_info, sizeof(type_info),
 289                         "rrtimeslice validated successfully; type length = %zu", len);
 290         type_info[sizeof(type_info) - 1] = '\0';
 291
 292         result = pstrdup(type_info);
 293         PG_RETURN_CSTRING(result);
 294 } /* rrtimeslice_validate */
 295
 296 Datum
 297 rrtimeslice_in(PG_FUNCTION_ARGS)
 298 {
 299         rrtimeslice_t *tslice;
 300
 301         TimestampTz tstamp = 0;
 302         int32 typmod;
 303
 304         struct pg_tm tm;
 305         fsec_t fsec = 0;
 306         int tz = 0;
 307
 308         char *time_str;
 309         int   pg_dt_err;
 310         char  buf[MAXDATELEN + MAXDATEFIELDS];
 311         char *field[MAXDATEFIELDS];
 312         int   ftype[MAXDATEFIELDS];
 313         int   num_fields = 0;
 314         int   dtype = 0;
 315
 316         if (PG_NARGS() != 3)
 317                 ereport(ERROR, (
 318                                         errmsg("rrtimeslice_in() expects three arguments"),
 319                                         errhint("Usage: rrtimeslice_in(col_name, oid, typmod)")
 320                                 ));
 321
 322         tslice   = (rrtimeslice_t *)palloc0(sizeof(*tslice));
 323         time_str = PG_GETARG_CSTRING(0);
 324         typmod   = PG_GETARG_INT32(2);
 325
 326         pg_dt_err = ParseDateTime(time_str, buf, sizeof(buf),
 327                         field, ftype, MAXDATEFIELDS, &num_fields);
 328
 329         if (! pg_dt_err)
 330                 pg_dt_err = DecodeDateTime(field, ftype, num_fields,
 331                                 &dtype, &tm, &fsec, &tz);
 332         if (pg_dt_err)
 333                 DateTimeParseError(pg_dt_err, time_str, "rrtimeslice");
 334
 335         switch (dtype) {
 336                 case DTK_DATE:
 337                         if (tm2timestamp(&tm, fsec, &tz, &tstamp))
 338                                 ereport(ERROR, (
 339                                                         errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
 340                                                         errmsg("timestamp out of range: %s", time_str)
 341                                                 ));
 342                         break;
 343
 344                 case DTK_EPOCH:
 345                         tstamp = SetEpochTimestamp();
 346                         break;
 347
 348                 default:
 349                         ereport(ERROR, (
 350                                                 errmsg("unexpected dtype %d while "
 351                                                         "parsing rrtimeslice: %s", dtype, time_str)
 352                                         ));
 353         }
 354
 355         tslice->tstamp = tstamp;
 356
 357         /* most likely, this won't happen … coerce_type
 358          * (src/backend/parser/parse_coerce.c) does not pass that information to
 359          * the input function but rather lets a length conversion cast do that
 360          * work */
 361         if (typmod > 0)
 362                 rrtimeslice_apply_typmod(tslice, typmod);
 363
 364         PG_RETURN_RRTIMESLICE_P(tslice);
 365 } /* rrtimeslice_in */
 366
 367 Datum
 368 rrtimeslice_out(PG_FUNCTION_ARGS)
 369 {
 370         rrtimeslice_t *tslice;
 371
 372         struct pg_tm tm;
 373         fsec_t fsec = 0;
 374         int tz = 0;
 375
 376         char *tz_str = NULL;
 377
 378         char  ts_str[MAXDATELEN + 1];
 379         char  buf_l[MAXDATELEN + 1];
 380         char  buf_u[MAXDATELEN + 1];
 381         char *result;
 382
 383         int32 len = 0;
 384         int32 num = 0;
 385
 386         if (PG_NARGS() != 1)
 387                 ereport(ERROR, (
 388                                         errmsg("rrtimeslice_out() expects one argument"),
 389                                         errhint("Usage: rrtimeslice_out(rrtimeslice)")
 390                                 ));
 391
 392         tslice = PG_GETARG_RRTIMESLICE_P(0);
 393
 394         if (TIMESTAMP_NOT_FINITE(tslice->tstamp)
 395                         || timestamp2tm(tslice->tstamp, &tz, &tm, &fsec, &tz_str, NULL))
 396                 ereport(ERROR, (
 397                                         errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
 398                                         errmsg("invalid (non-finite) timestamp")
 399                                 ));
 400
 401         EncodeDateTime(&tm, fsec, &tz, &tz_str, DateStyle, buf_u);
 402
 403         if (! rrtimeslice_get_spec(tslice->tsid, &len, &num)) {
 404                 TimestampTz lower = tslice->tstamp - (len * USECS_PER_SEC);
 405
 406                 if (timestamp2tm(lower, &tz, &tm, &fsec, &tz_str, NULL))
 407                         ereport(ERROR, (
 408                                                 errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
 409                                                 errmsg("invalid (non-finite) lower timestamp")
 410                                         ));
 411
 412                 EncodeDateTime(&tm, fsec, &tz, &tz_str, DateStyle, buf_l);
 413         }
 414         else {
 415                 strncpy(buf_l, "ERR", sizeof(buf_l));
 416                 buf_l[sizeof(buf_l) - 1] = '\0';
 417         }
 418
 419         snprintf(ts_str, sizeof(ts_str), "(\"%s\", \"%s\"] #%i/%i",
 420                         buf_l, buf_u, tslice->seq, num);
 421
 422         result = pstrdup(ts_str);
 423         PG_RETURN_CSTRING(result);
 424 } /* rrtimeslice_out */
 425
 426 Datum
 427 rrtimeslice_typmodin(PG_FUNCTION_ARGS)
 428 {
 429         ArrayType *tm_array;
 430
 431         int32 *spec;
 432         int    spec_elems = 0;
 433         int32  typmod;
 434
 435         if (PG_NARGS() != 1)
 436                 ereport(ERROR, (
 437                                         errmsg("rrtimeslice_typmodin() expects one argument"),
 438                                         errhint("Usage: rrtimeslice_typmodin(array)")
 439                                 ));
 440
 441         tm_array = PG_GETARG_ARRAYTYPE_P(0);
 442
 443         spec = ArrayGetIntegerTypmods(tm_array, &spec_elems);
 444         if (spec_elems != 2)
 445                 ereport(ERROR, (
 446                                         errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 447                                         errmsg("invalid rrtimeslice type modifier"),
 448                                         errhint("Usage: rrtimeslice(<slice_len>, <num>)")
 449                                 ));
 450
 451         typmod = rrtimeslice_set_spec(spec[0], spec[1]);
 452         PG_RETURN_INT32(typmod);
 453 } /* rrtimeslice_typmodin */
 454
 455 Datum
 456 rrtimeslice_typmodout(PG_FUNCTION_ARGS)
 457 {
 458         int32 typmod;
 459         char  tm_str[1024];
 460         char *result;
 461
 462         int32 len = 0;
 463         int32 num = 0;
 464
 465         if (PG_NARGS() != 1)
 466                 ereport(ERROR, (
 467                                         errmsg("rrtimeslice_typmodout() expects one argument"),
 468                                         errhint("Usage: rrtimeslice_typmodout(typmod)")
 469                                 ));
 470
 471         typmod = PG_GETARG_INT32(0);
 472         if (rrtimeslice_get_spec(typmod, &len, &num))
 473                 tm_str[0] = '\0';
 474         else if ((len <= 0) || (num <= 0))
 475                 snprintf(tm_str, sizeof(tm_str), "(#ERR, #ERR)");
 476         else
 477                 snprintf(tm_str, sizeof(tm_str), "(%d, %d)", len, num);
 478
 479         result = pstrdup(tm_str);
 480         PG_RETURN_CSTRING(result);
 481 } /* rrtimeslice_typmodout */
 482
 483 Datum
 484 rrtimeslice_to_rrtimeslice(PG_FUNCTION_ARGS)
 485 {
 486         rrtimeslice_t *tslice;
 487         int32 typmod;
 488
 489         if (PG_NARGS() != 3)
 490                 ereport(ERROR, (
 491                                         errmsg("rrtimeslice_to_rrtimeslice() "
 492                                                 "expects three arguments"),
 493                                         errhint("Usage: rrtimeslice_to_rrtimeslice"
 494                                                 "(rrtimeslice, typmod, is_explicit)")
 495                                 ));
 496
 497         tslice = PG_GETARG_RRTIMESLICE_P(0);
 498         typmod = PG_GETARG_INT32(1);
 499
 500         if (typmod > 0) {
 501                 if ((! tslice->tsid) && (! tslice->seq))
 502                         rrtimeslice_apply_typmod(tslice, typmod);
 503                 else
 504                         ereport(ERROR, (
 505                                                 errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 506                                                 errmsg("invalid cast: cannot cast rrtimeslices "
 507                                                         "with different typmod (yet)")
 508                                         ));
 509         }
 510
 511         PG_RETURN_RRTIMESLICE_P(tslice);
 512 } /* rrtimeslice_to_rrtimeslice */
 513
 514 Datum
 515 rrtimeslice_to_timestamptz(PG_FUNCTION_ARGS)
 516 {
 517         rrtimeslice_t *tslice;
 518
 519         if (PG_NARGS() != 1)
 520                 ereport(ERROR, (
 521                                         errmsg("rrtimeslice_to_timestamptz() "
 522                                                 "expects one argument"),
 523                                         errhint("Usage: rrtimeslice_to_timestamptz"
 524                                                 "(rrtimeslice)")
 525                                 ));
 526
 527         tslice = PG_GETARG_RRTIMESLICE_P(0);
 528         PG_RETURN_TIMESTAMPTZ(tslice->tstamp);
 529 } /* rrtimeslice_to_timestamptz */
 530
 531 int
 532 rrtimeslice_cmp_internal(rrtimeslice_t *ts1, rrtimeslice_t *ts2)
 533 {
 534         int status;
 535
 536         status = rrtimeslice_cmp_unify(ts1, ts2);
 537         if (status) /* [1, 3] -> [-1, 1] */
 538                 return status - 2;
 539
 540         if (ts1->tstamp == ts2->tstamp)
 541                 return 0;
 542         else if ((ts1->seq == ts2->seq) && (ts1->tstamp < ts2->tstamp))
 543                 return -1;
 544         else if (ts1->tstamp < ts2->tstamp)
 545                 return -2;
 546         else if ((ts1->seq == ts2->seq) && (ts1->tstamp > ts2->tstamp))
 547                 return 1;
 548         else
 549                 return 2;
 550 } /* rrtimeslice_cmp_internal */
 551
 552 Datum
 553 rrtimeslice_cmp(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_INT32(rrtimeslice_cmp_internal(ts1, ts2));
 559 } /* rrtimeslice_cmp */
 560
 561 int
 562 rrtimeslice_seq_cmp_internal(rrtimeslice_t *ts1, rrtimeslice_t *ts2)
 563 {
 564         int status;
 565
 566         status = rrtimeslice_cmp_unify(ts1, ts2);
 567         if (status) /* [1, 3] -> [-1, 1] */
 568                 return status - 2;
 569
 570         if (ts1->seq < ts2->seq)
 571                 return -1;
 572         else if (ts1->seq == ts2->seq)
 573                 return 0;
 574         else
 575                 return 1;
 576 } /* rrtimeslice_seq_cmp_internal */
 577
 578 Datum
 579 rrtimeslice_seq_eq(PG_FUNCTION_ARGS)
 580 {
 581         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 582         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 583
 584         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) == 0);
 585 } /* rrtimeslice_seq_eq */
 586
 587 Datum
 588 rrtimeslice_seq_ne(PG_FUNCTION_ARGS)
 589 {
 590         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 591         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 592
 593         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) != 0);
 594 } /* rrtimeslice_seq_ne */
 595
 596 Datum
 597 rrtimeslice_seq_lt(PG_FUNCTION_ARGS)
 598 {
 599         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 600         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 601
 602         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) < 0);
 603 } /* rrtimeslice_seq_lt */
 604
 605 Datum
 606 rrtimeslice_seq_le(PG_FUNCTION_ARGS)
 607 {
 608         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 609         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 610
 611         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) <= 0);
 612 } /* rrtimeslice_seq_le */
 613
 614 Datum
 615 rrtimeslice_seq_gt(PG_FUNCTION_ARGS)
 616 {
 617         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 618         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 619
 620         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) > 0);
 621 } /* rrtimeslice_seq_gt */
 622
 623 Datum
 624 rrtimeslice_seq_ge(PG_FUNCTION_ARGS)
 625 {
 626         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 627         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 628
 629         PG_RETURN_BOOL(rrtimeslice_seq_cmp_internal(ts1, ts2) >= 0);
 630 } /* rrtimeslice_seq_ge */
 631
 632 Datum
 633 rrtimeslice_seq_cmp(PG_FUNCTION_ARGS)
 634 {
 635         rrtimeslice_t *ts1 = PG_GETARG_RRTIMESLICE_P(0);
 636         rrtimeslice_t *ts2 = PG_GETARG_RRTIMESLICE_P(1);
 637
 638         PG_RETURN_INT32(rrtimeslice_seq_cmp_internal(ts1, ts2));
 639 } /* rrtimeslice_seq_cmp */
 640
 641 Datum
 642 rrtimeslice_seq_hash(PG_FUNCTION_ARGS)
 643 {
 644         rrtimeslice_t *ts = PG_GETARG_RRTIMESLICE_P(0);
 645         return hash_uint32(ts->seq);
 646 } /* rrtimeslice_seq_hash */
 647
 648 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 649