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69f75bf825f83dc506e73cf88f0adde541c39004
postgres/contrib/btree_gist/btree_ts.c
Tom Lane c08da32f13 Get rid of trailing semicolons in C macro definitions. 
Writing a trailing semicolon in a macro is almost never the right thing,
because you almost always want to write a semicolon after each macro
call instead.  (Even if there was some reason to prefer not to, pgindent
would probably make a hash of code formatted that way; so within PG the
rule should basically be "don't do it".)  Thus, if we have a semi inside
the macro, the compiler sees "something;;".  Much of the time the extra
empty statement is harmless, but it could lead to mysterious syntax
errors at call sites.  In perhaps an overabundance of neatnik-ism, let's
run around and get rid of the excess semicolons whereever possible.

The only thing worse than a mysterious syntax error is a mysterious
syntax error that only happens in the back branches; therefore,
backpatch these changes where relevant, which is most of them because
most of these mistakes are old.  (The lack of reported problems shows
that this is largely a hypothetical issue, but still, it could bite
us in some future patch.)

John Naylor and Tom Lane

Discussion: https://postgr.es/m/CACPNZCs0qWTqJ2QUSGJ07B7uvAvzMb-KbG2q+oo+J3tsWN5cqw@mail.gmail.com
2020-05-01 17:28:00 -04:00

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/*
* contrib/btree_gist/btree_ts.c
*/
#include "postgres.h"
#include <limits.h>
#include "btree_gist.h"
#include "btree_utils_num.h"
#include "utils/builtins.h"
#include "utils/datetime.h"
#include "utils/float.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_fetch);
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);
#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, FmgrInfo *flinfo)
{
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, FmgrInfo *flinfo)
{
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, FmgrInfo *flinfo)
{
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, FmgrInfo *flinfo)
{
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, FmgrInfo *flinfo)
{
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, FmgrInfo *flinfo)
{
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, FmgrInfo *flinfo)
{
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),
16, /* sizeof(gbtreekey16) */
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)
{
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;
p->time = PG_INT64_MAX;
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)
{
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;
p->time = PG_INT64_MAX;
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);
PG_RETURN_POINTER(gbt_num_compress(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_fetch(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
}
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, fcinfo->flinfo)
);
}
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, fcinfo->flinfo)
);
}
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, fcinfo->flinfo)
);
}
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, fcinfo->flinfo)
);
}
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, fcinfo->flinfo));
}
#define penalty_check_max_float(val) \
do { \
if ( val > FLT_MAX ) \
val = FLT_MAX; \
if ( val < -FLT_MAX ) \
val = -FLT_MAX; \
} while (0)
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, fcinfo->flinfo
));
}
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, fcinfo->flinfo);
PG_RETURN_POINTER(result);
}
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