~ubuntu-branches/ubuntu/trusty/postgresql-9.3/trusty-proposed

/*

 * contrib/btree_gist/btree_ts.c

 */

#include "postgres.h"

#include "btree_gist.h"

#include "btree_utils_num.h"

#include "utils/builtins.h"

#include "utils/datetime.h"

typedef struct

{

	Timestamp	lower;

	Timestamp	upper;

} tsKEY;

/*

** timestamp ops

*/

PG_FUNCTION_INFO_V1(gbt_ts_compress);

PG_FUNCTION_INFO_V1(gbt_tstz_compress);

PG_FUNCTION_INFO_V1(gbt_ts_union);

PG_FUNCTION_INFO_V1(gbt_ts_picksplit);

PG_FUNCTION_INFO_V1(gbt_ts_consistent);

PG_FUNCTION_INFO_V1(gbt_ts_distance);

PG_FUNCTION_INFO_V1(gbt_tstz_consistent);

PG_FUNCTION_INFO_V1(gbt_tstz_distance);

PG_FUNCTION_INFO_V1(gbt_ts_penalty);

PG_FUNCTION_INFO_V1(gbt_ts_same);

Datum		gbt_ts_compress(PG_FUNCTION_ARGS);

Datum		gbt_tstz_compress(PG_FUNCTION_ARGS);

Datum		gbt_ts_union(PG_FUNCTION_ARGS);

Datum		gbt_ts_picksplit(PG_FUNCTION_ARGS);

Datum		gbt_ts_consistent(PG_FUNCTION_ARGS);

Datum		gbt_ts_distance(PG_FUNCTION_ARGS);

Datum		gbt_tstz_consistent(PG_FUNCTION_ARGS);

Datum		gbt_tstz_distance(PG_FUNCTION_ARGS);

Datum		gbt_ts_penalty(PG_FUNCTION_ARGS);

Datum		gbt_ts_same(PG_FUNCTION_ARGS);

#ifdef USE_FLOAT8_BYVAL

#define TimestampGetDatumFast(X) TimestampGetDatum(X)

#else

#define TimestampGetDatumFast(X) PointerGetDatum(&(X))

#endif

static bool

gbt_tsgt(const void *a, const void *b)

{

	const Timestamp *aa = (const Timestamp *) a;

	const Timestamp *bb = (const Timestamp *) b;

	return DatumGetBool(DirectFunctionCall2(timestamp_gt,

											TimestampGetDatumFast(*aa),

											TimestampGetDatumFast(*bb)));

}

static bool

gbt_tsge(const void *a, const void *b)

{

	const Timestamp *aa = (const Timestamp *) a;

	const Timestamp *bb = (const Timestamp *) b;

	return DatumGetBool(DirectFunctionCall2(timestamp_ge,

											TimestampGetDatumFast(*aa),

											TimestampGetDatumFast(*bb)));

}

static bool

gbt_tseq(const void *a, const void *b)

{

	const Timestamp *aa = (const Timestamp *) a;

	const Timestamp *bb = (const Timestamp *) b;

	return DatumGetBool(DirectFunctionCall2(timestamp_eq,

											TimestampGetDatumFast(*aa),

											TimestampGetDatumFast(*bb)));

}

static bool

gbt_tsle(const void *a, const void *b)

{

	const Timestamp *aa = (const Timestamp *) a;

	const Timestamp *bb = (const Timestamp *) b;

	return DatumGetBool(DirectFunctionCall2(timestamp_le,

											TimestampGetDatumFast(*aa),

											TimestampGetDatumFast(*bb)));

}

static bool

gbt_tslt(const void *a, const void *b)

{

	const Timestamp *aa = (const Timestamp *) a;

	const Timestamp *bb = (const Timestamp *) b;

	return DatumGetBool(DirectFunctionCall2(timestamp_lt,

											TimestampGetDatumFast(*aa),

											TimestampGetDatumFast(*bb)));

}

static int

gbt_tskey_cmp(const void *a, const void *b)

{

	tsKEY	   *ia = (tsKEY *) (((const Nsrt *) a)->t);

	tsKEY	   *ib = (tsKEY *) (((const Nsrt *) b)->t);

	int			res;

	res = DatumGetInt32(DirectFunctionCall2(timestamp_cmp, TimestampGetDatumFast(ia->lower), TimestampGetDatumFast(ib->lower)));

	if (res == 0)

		return DatumGetInt32(DirectFunctionCall2(timestamp_cmp, TimestampGetDatumFast(ia->upper), TimestampGetDatumFast(ib->upper)));

	return res;

}

static float8

gbt_ts_dist(const void *a, const void *b)

{

	const Timestamp *aa = (const Timestamp *) a;

	const Timestamp *bb = (const Timestamp *) b;

	Interval   *i;

	if (TIMESTAMP_NOT_FINITE(*aa) || TIMESTAMP_NOT_FINITE(*bb))

		return get_float8_infinity();

	i = DatumGetIntervalP(DirectFunctionCall2(timestamp_mi,

											  TimestampGetDatumFast(*aa),

											  TimestampGetDatumFast(*bb)));

	return (float8) Abs(INTERVAL_TO_SEC(i));

}

static const gbtree_ninfo tinfo =

{

	gbt_t_ts,

	sizeof(Timestamp),

	gbt_tsgt,

	gbt_tsge,

	gbt_tseq,

	gbt_tsle,

	gbt_tslt,

	gbt_tskey_cmp,

	gbt_ts_dist

};

PG_FUNCTION_INFO_V1(ts_dist);

Datum		ts_dist(PG_FUNCTION_ARGS);

Datum

ts_dist(PG_FUNCTION_ARGS)

{

	Timestamp	a = PG_GETARG_TIMESTAMP(0);

	Timestamp	b = PG_GETARG_TIMESTAMP(1);

	Interval   *r;

	if (TIMESTAMP_NOT_FINITE(a) || TIMESTAMP_NOT_FINITE(b))

	{

		Interval   *p = palloc(sizeof(Interval));

		p->day = INT_MAX;

		p->month = INT_MAX;

#ifdef HAVE_INT64_TIMESTAMP

		p->time = INT64CONST(0x7FFFFFFFFFFFFFFF);

#else

		p->time = DBL_MAX;

#endif

		PG_RETURN_INTERVAL_P(p);

	}

	else

		r = DatumGetIntervalP(DirectFunctionCall2(timestamp_mi,

												  PG_GETARG_DATUM(0),

												  PG_GETARG_DATUM(1)));

	PG_RETURN_INTERVAL_P(abs_interval(r));

}

PG_FUNCTION_INFO_V1(tstz_dist);

Datum		tstz_dist(PG_FUNCTION_ARGS);

Datum

tstz_dist(PG_FUNCTION_ARGS)

{

	TimestampTz a = PG_GETARG_TIMESTAMPTZ(0);

	TimestampTz b = PG_GETARG_TIMESTAMPTZ(1);

	Interval   *r;

	if (TIMESTAMP_NOT_FINITE(a) || TIMESTAMP_NOT_FINITE(b))

	{

		Interval   *p = palloc(sizeof(Interval));

		p->day = INT_MAX;

		p->month = INT_MAX;

#ifdef HAVE_INT64_TIMESTAMP

		p->time = INT64CONST(0x7FFFFFFFFFFFFFFF);

#else

		p->time = DBL_MAX;

#endif

		PG_RETURN_INTERVAL_P(p);

	}

	r = DatumGetIntervalP(DirectFunctionCall2(timestamp_mi,

											  PG_GETARG_DATUM(0),

											  PG_GETARG_DATUM(1)));

	PG_RETURN_INTERVAL_P(abs_interval(r));

}

/**************************************************

 * timestamp ops

 **************************************************/

static inline Timestamp

tstz_to_ts_gmt(TimestampTz ts)

{

	/* No timezone correction is needed, since GMT is offset 0 by definition */

	return (Timestamp) ts;

}

Datum

gbt_ts_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_tstz_compress(PG_FUNCTION_ARGS)

{

	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);

	GISTENTRY  *retval;

	if (entry->leafkey)

	{

		tsKEY	   *r = (tsKEY *) palloc(sizeof(tsKEY));

		TimestampTz ts = DatumGetTimestampTz(entry->key);

		Timestamp	gmt;

		gmt = tstz_to_ts_gmt(ts);

		retval = palloc(sizeof(GISTENTRY));

		r->lower = r->upper = gmt;

		gistentryinit(*retval, PointerGetDatum(r),

					  entry->rel, entry->page,

					  entry->offset, FALSE);

	}

	else

		retval = entry;

	PG_RETURN_POINTER(retval);

}

Datum

gbt_ts_consistent(PG_FUNCTION_ARGS)

{

	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);

	Timestamp	query = PG_GETARG_TIMESTAMP(1);

	StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);

	/* Oid		subtype = PG_GETARG_OID(3); */

	bool	   *recheck = (bool *) PG_GETARG_POINTER(4);

	tsKEY	   *kkk = (tsKEY *) 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_ts_distance(PG_FUNCTION_ARGS)

{

	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);

	Timestamp	query = PG_GETARG_TIMESTAMP(1);

	/* Oid		subtype = PG_GETARG_OID(3); */

	tsKEY	   *kkk = (tsKEY *) DatumGetPointer(entry->key);

	GBT_NUMKEY_R key;

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

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

	PG_RETURN_FLOAT8(

			gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry), &tinfo)

		);

}

Datum

gbt_tstz_consistent(PG_FUNCTION_ARGS)

{

	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);

	TimestampTz query = PG_GETARG_TIMESTAMPTZ(1);

	StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);

	/* Oid		subtype = PG_GETARG_OID(3); */

	bool	   *recheck = (bool *) PG_GETARG_POINTER(4);

	char	   *kkk = (char *) DatumGetPointer(entry->key);

	GBT_NUMKEY_R key;

	Timestamp	qqq;

	/* All cases served by this function are exact */

	*recheck = false;

	key.lower = (GBT_NUMKEY *) &kkk[0];

	key.upper = (GBT_NUMKEY *) &kkk[MAXALIGN(tinfo.size)];

	qqq = tstz_to_ts_gmt(query);

	PG_RETURN_BOOL(

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

		);

}

Datum

gbt_tstz_distance(PG_FUNCTION_ARGS)

{

	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);

	TimestampTz query = PG_GETARG_TIMESTAMPTZ(1);

	/* Oid		subtype = PG_GETARG_OID(3); */

	char	   *kkk = (char *) DatumGetPointer(entry->key);

	GBT_NUMKEY_R key;

	Timestamp	qqq;

	key.lower = (GBT_NUMKEY *) &kkk[0];

	key.upper = (GBT_NUMKEY *) &kkk[MAXALIGN(tinfo.size)];

	qqq = tstz_to_ts_gmt(query);

	PG_RETURN_FLOAT8(

			  gbt_num_distance(&key, (void *) &qqq, GIST_LEAF(entry), &tinfo)

		);

}

Datum

gbt_ts_union(PG_FUNCTION_ARGS)

{

	GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);

	void	   *out = palloc(sizeof(tsKEY));

	*(int *) PG_GETARG_POINTER(1) = sizeof(tsKEY);

	PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));

}

#define penalty_check_max_float(val) do { \

		if ( val > FLT_MAX ) \

				val = FLT_MAX; \

		if ( val < -FLT_MAX ) \

				val = -FLT_MAX; \

} while(false);

Datum

gbt_ts_penalty(PG_FUNCTION_ARGS)

{

	tsKEY	   *origentry = (tsKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);

	tsKEY	   *newentry = (tsKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);

	float	   *result = (float *) PG_GETARG_POINTER(2);

	double		orgdbl[2],

				newdbl[2];

	/*

	 * We are always using "double" timestamps here. Precision should be good

	 * enough.

	 */

	orgdbl[0] = ((double) origentry->lower);

	orgdbl[1] = ((double) origentry->upper);

	newdbl[0] = ((double) newentry->lower);

	newdbl[1] = ((double) newentry->upper);

	penalty_check_max_float(orgdbl[0]);

	penalty_check_max_float(orgdbl[1]);

	penalty_check_max_float(newdbl[0]);

	penalty_check_max_float(newdbl[1]);

	penalty_num(result, orgdbl[0], orgdbl[1], newdbl[0], newdbl[1]);

	PG_RETURN_POINTER(result);

}

Datum

gbt_ts_picksplit(PG_FUNCTION_ARGS)

{

	PG_RETURN_POINTER(gbt_num_picksplit(

									(GistEntryVector *) PG_GETARG_POINTER(0),

									  (GIST_SPLITVEC *) PG_GETARG_POINTER(1),

										&tinfo

										));

}

Datum

gbt_ts_same(PG_FUNCTION_ARGS)

{

	tsKEY	   *b1 = (tsKEY *) PG_GETARG_POINTER(0);

	tsKEY	   *b2 = (tsKEY *) PG_GETARG_POINTER(1);

	bool	   *result = (bool *) PG_GETARG_POINTER(2);

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

	PG_RETURN_POINTER(result);

}