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Sourcecode: postgresql-8.4 version File versions

btree_time.c

/*
 * $PostgreSQL: pgsql/contrib/btree_gist/btree_time.c,v 1.15 2008/05/17 01:28:19 adunstan Exp $ 
 */
#include "btree_gist.h"
#include "btree_utils_num.h"
#include "utils/date.h"
#include "utils/timestamp.h"

typedef struct
{
      TimeADT           lower;
      TimeADT           upper;
}     timeKEY;

/*
** time ops
*/
PG_FUNCTION_INFO_V1(gbt_time_compress);
PG_FUNCTION_INFO_V1(gbt_timetz_compress);
PG_FUNCTION_INFO_V1(gbt_time_union);
PG_FUNCTION_INFO_V1(gbt_time_picksplit);
PG_FUNCTION_INFO_V1(gbt_time_consistent);
PG_FUNCTION_INFO_V1(gbt_timetz_consistent);
PG_FUNCTION_INFO_V1(gbt_time_penalty);
PG_FUNCTION_INFO_V1(gbt_time_same);

Datum       gbt_time_compress(PG_FUNCTION_ARGS);
Datum       gbt_timetz_compress(PG_FUNCTION_ARGS);
Datum       gbt_time_union(PG_FUNCTION_ARGS);
Datum       gbt_time_picksplit(PG_FUNCTION_ARGS);
Datum       gbt_time_consistent(PG_FUNCTION_ARGS);
Datum       gbt_timetz_consistent(PG_FUNCTION_ARGS);
Datum       gbt_time_penalty(PG_FUNCTION_ARGS);
Datum       gbt_time_same(PG_FUNCTION_ARGS);


#ifdef USE_FLOAT8_BYVAL
#define TimeADTGetDatumFast(X) TimeADTGetDatum(X)
#else
#define TimeADTGetDatumFast(X) PointerGetDatum(&(X))
#endif


static bool
gbt_timegt(const void *a, const void *b)
{
      const TimeADT *aa = (const TimeADT *) a;
      const TimeADT *bb = (const TimeADT *) b;

      return DatumGetBool(DirectFunctionCall2(time_gt,
                                                                  TimeADTGetDatumFast(*aa),
                                                                  TimeADTGetDatumFast(*bb)));
}

static bool
gbt_timege(const void *a, const void *b)
{
      const TimeADT *aa = (const TimeADT *) a;
      const TimeADT *bb = (const TimeADT *) b;

      return DatumGetBool(DirectFunctionCall2(time_ge,
                                                                  TimeADTGetDatumFast(*aa),
                                                                  TimeADTGetDatumFast(*bb)));
}

static bool
gbt_timeeq(const void *a, const void *b)
{
      const TimeADT *aa = (const TimeADT *) a;
      const TimeADT *bb = (const TimeADT *) b;

      return DatumGetBool(DirectFunctionCall2(time_eq,
                                                                  TimeADTGetDatumFast(*aa),
                                                                  TimeADTGetDatumFast(*bb)));
}

static bool
gbt_timele(const void *a, const void *b)
{
      const TimeADT *aa = (const TimeADT *) a;
      const TimeADT *bb = (const TimeADT *) b;

      return DatumGetBool(DirectFunctionCall2(time_le,
                                                                  TimeADTGetDatumFast(*aa),
                                                                  TimeADTGetDatumFast(*bb)));
}

static bool
gbt_timelt(const void *a, const void *b)
{
      const TimeADT *aa = (const TimeADT *) a;
      const TimeADT *bb = (const TimeADT *) b;

      return DatumGetBool(DirectFunctionCall2(time_lt,
                                                                  TimeADTGetDatumFast(*aa),
                                                                  TimeADTGetDatumFast(*bb)));
}



static int
gbt_timekey_cmp(const void *a, const void *b)
{
      if (gbt_timegt((void *) &(((Nsrt *) a)->t[0]), (void *) &(((Nsrt *) b)->t[0])))
            return 1;
      else if (gbt_timelt((void *) &(((Nsrt *) a)->t[0]), (void *) &(((Nsrt *) b)->t[0])))
            return -1;
      return 0;
}


static const gbtree_ninfo tinfo =
{
      gbt_t_time,
      sizeof(TimeADT),
      gbt_timegt,
      gbt_timege,
      gbt_timeeq,
      gbt_timele,
      gbt_timelt,
      gbt_timekey_cmp
};


/**************************************************
 * time ops
 **************************************************/



Datum
gbt_time_compress(PG_FUNCTION_ARGS)
{
      GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
      GISTENTRY  *retval = NULL;

      PG_RETURN_POINTER(gbt_num_compress(retval, entry, &tinfo));
}


Datum
gbt_timetz_compress(PG_FUNCTION_ARGS)
{
      GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
      GISTENTRY  *retval;

      if (entry->leafkey)
      {
            timeKEY    *r = (timeKEY *) palloc(sizeof(timeKEY));
            TimeTzADT  *tz = DatumGetTimeTzADTP(entry->key);
            TimeADT           tmp;

            retval = palloc(sizeof(GISTENTRY));

            /* We are using the time + zone only to compress */
#ifdef HAVE_INT64_TIMESTAMP
            tmp = tz->time + (tz->zone * INT64CONST(1000000));
#else
            tmp = (tz->time + tz->zone);
#endif
            r->lower = r->upper = tmp;
            gistentryinit(*retval, PointerGetDatum(r),
                                entry->rel, entry->page,
                                entry->offset, FALSE);
      }
      else
            retval = entry;
      PG_RETURN_POINTER(retval);
}


Datum
gbt_time_consistent(PG_FUNCTION_ARGS)
{
      GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
      TimeADT           query = PG_GETARG_TIMEADT(1);
      StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
      /* Oid            subtype = PG_GETARG_OID(3); */
      bool     *recheck = (bool *) PG_GETARG_POINTER(4);
      timeKEY    *kkk = (timeKEY *) DatumGetPointer(entry->key);
      GBT_NUMKEY_R key;

      /* All cases served by this function are exact */
      *recheck = false;

      key.lower = (GBT_NUMKEY *) & kkk->lower;
      key.upper = (GBT_NUMKEY *) & kkk->upper;

      PG_RETURN_BOOL(
                           gbt_num_consistent(&key, (void *) &query, &strategy, GIST_LEAF(entry), &tinfo)
            );
}

Datum
gbt_timetz_consistent(PG_FUNCTION_ARGS)
{
      GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
      TimeTzADT  *query = PG_GETARG_TIMETZADT_P(1);
      StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
      /* Oid            subtype = PG_GETARG_OID(3); */
      bool     *recheck = (bool *) PG_GETARG_POINTER(4);
      timeKEY    *kkk = (timeKEY *) DatumGetPointer(entry->key);
      TimeADT           qqq;
      GBT_NUMKEY_R key;

      /* All cases served by this function are inexact */
      *recheck = true;

#ifdef HAVE_INT64_TIMESTAMP
      qqq = query->time + (query->zone * INT64CONST(1000000));
#else
      qqq = (query->time + query->zone);
#endif

      key.lower = (GBT_NUMKEY *) & kkk->lower;
      key.upper = (GBT_NUMKEY *) & kkk->upper;

      PG_RETURN_BOOL(
                           gbt_num_consistent(&key, (void *) &qqq, &strategy, GIST_LEAF(entry), &tinfo)
            );
}


Datum
gbt_time_union(PG_FUNCTION_ARGS)
{
      GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
      void     *out = palloc(sizeof(timeKEY));

      *(int *) PG_GETARG_POINTER(1) = sizeof(timeKEY);
      PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
}


Datum
gbt_time_penalty(PG_FUNCTION_ARGS)
{
      timeKEY    *origentry = (timeKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
      timeKEY    *newentry = (timeKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
      float    *result = (float *) PG_GETARG_POINTER(2);
      Interval   *intr;
      double            res;
      double            res2;

      intr = DatumGetIntervalP(DirectFunctionCall2(
                                                                         time_mi_time,
                                                              TimeADTGetDatumFast(newentry->upper),
                                                         TimeADTGetDatumFast(origentry->upper)));
      res = INTERVAL_TO_SEC(intr);
      res = Max(res, 0);

      intr = DatumGetIntervalP(DirectFunctionCall2(
                                                                         time_mi_time,
                                                             TimeADTGetDatumFast(origentry->lower),
                                                            TimeADTGetDatumFast(newentry->lower)));
      res2 = INTERVAL_TO_SEC(intr);
      res2 = Max(res2, 0);

      res += res2;

      *result = 0.0;

      if (res > 0)
      {
            intr = DatumGetIntervalP(DirectFunctionCall2(
                                                                               time_mi_time,
                                                             TimeADTGetDatumFast(origentry->upper),
                                                         TimeADTGetDatumFast(origentry->lower)));
            *result += FLT_MIN;
            *result += (float) (res / (res + INTERVAL_TO_SEC(intr)));
            *result *= (FLT_MAX / (((GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1));
      }

      PG_RETURN_POINTER(result);
}


Datum
gbt_time_picksplit(PG_FUNCTION_ARGS)
{
      PG_RETURN_POINTER(gbt_num_picksplit(
                                                      (GistEntryVector *) PG_GETARG_POINTER(0),
                                                        (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
                                                            &tinfo
                                                            ));
}

Datum
gbt_time_same(PG_FUNCTION_ARGS)
{
      timeKEY    *b1 = (timeKEY *) PG_GETARG_POINTER(0);
      timeKEY    *b2 = (timeKEY *) PG_GETARG_POINTER(1);
      bool     *result = (bool *) PG_GETARG_POINTER(2);

      *result = gbt_num_same((void *) b1, (void *) b2, &tinfo);
      PG_RETURN_POINTER(result);
}

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