mirror of
https://github.com/postgres/postgres.git
synced 2025-10-29 22:49:41 +03:00
b8b2e3b2de
The latter was already the dominant use, and it's preferable because in C the convention is that intXX means XX bits. Therefore, allowing mixed use of int2, int4, int8, int16, int32 is obviously confusing. Remove the typedefs for int2 and int4 for now. They don't seem to be widely used outside of the PostgreSQL source tree, and the few uses can probably be cleaned up by the time this ships.
614 lines
12 KiB
C
614 lines
12 KiB
C
/*
|
|
* contrib/intarray/_intbig_gist.c
|
|
*/
|
|
#include "postgres.h"
|
|
|
|
#include "access/gist.h"
|
|
#include "access/skey.h"
|
|
|
|
#include "_int.h"
|
|
|
|
#define GETENTRY(vec,pos) ((GISTTYPE *) DatumGetPointer((vec)->vector[(pos)].key))
|
|
/*
|
|
** _intbig methods
|
|
*/
|
|
PG_FUNCTION_INFO_V1(g_intbig_consistent);
|
|
PG_FUNCTION_INFO_V1(g_intbig_compress);
|
|
PG_FUNCTION_INFO_V1(g_intbig_decompress);
|
|
PG_FUNCTION_INFO_V1(g_intbig_penalty);
|
|
PG_FUNCTION_INFO_V1(g_intbig_picksplit);
|
|
PG_FUNCTION_INFO_V1(g_intbig_union);
|
|
PG_FUNCTION_INFO_V1(g_intbig_same);
|
|
|
|
Datum g_intbig_consistent(PG_FUNCTION_ARGS);
|
|
Datum g_intbig_compress(PG_FUNCTION_ARGS);
|
|
Datum g_intbig_decompress(PG_FUNCTION_ARGS);
|
|
Datum g_intbig_penalty(PG_FUNCTION_ARGS);
|
|
Datum g_intbig_picksplit(PG_FUNCTION_ARGS);
|
|
Datum g_intbig_union(PG_FUNCTION_ARGS);
|
|
Datum g_intbig_same(PG_FUNCTION_ARGS);
|
|
|
|
/* Number of one-bits in an unsigned byte */
|
|
static const uint8 number_of_ones[256] = {
|
|
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
|
|
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
|
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
|
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
|
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
|
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
|
|
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
|
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
|
|
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
|
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
|
|
4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
|
|
};
|
|
|
|
PG_FUNCTION_INFO_V1(_intbig_in);
|
|
Datum _intbig_in(PG_FUNCTION_ARGS);
|
|
|
|
PG_FUNCTION_INFO_V1(_intbig_out);
|
|
Datum _intbig_out(PG_FUNCTION_ARGS);
|
|
|
|
|
|
Datum
|
|
_intbig_in(PG_FUNCTION_ARGS)
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("_intbig_in() not implemented")));
|
|
PG_RETURN_DATUM(0);
|
|
}
|
|
|
|
Datum
|
|
_intbig_out(PG_FUNCTION_ARGS)
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("_intbig_out() not implemented")));
|
|
PG_RETURN_DATUM(0);
|
|
}
|
|
|
|
|
|
/*********************************************************************
|
|
** intbig functions
|
|
*********************************************************************/
|
|
static bool
|
|
_intbig_overlap(GISTTYPE *a, ArrayType *b)
|
|
{
|
|
int num = ARRNELEMS(b);
|
|
int32 *ptr = ARRPTR(b);
|
|
|
|
CHECKARRVALID(b);
|
|
|
|
while (num--)
|
|
{
|
|
if (GETBIT(GETSIGN(a), HASHVAL(*ptr)))
|
|
return true;
|
|
ptr++;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
_intbig_contains(GISTTYPE *a, ArrayType *b)
|
|
{
|
|
int num = ARRNELEMS(b);
|
|
int32 *ptr = ARRPTR(b);
|
|
|
|
CHECKARRVALID(b);
|
|
|
|
while (num--)
|
|
{
|
|
if (!GETBIT(GETSIGN(a), HASHVAL(*ptr)))
|
|
return false;
|
|
ptr++;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
Datum
|
|
g_intbig_same(PG_FUNCTION_ARGS)
|
|
{
|
|
GISTTYPE *a = (GISTTYPE *) PG_GETARG_POINTER(0);
|
|
GISTTYPE *b = (GISTTYPE *) PG_GETARG_POINTER(1);
|
|
bool *result = (bool *) PG_GETARG_POINTER(2);
|
|
|
|
if (ISALLTRUE(a) && ISALLTRUE(b))
|
|
*result = true;
|
|
else if (ISALLTRUE(a))
|
|
*result = false;
|
|
else if (ISALLTRUE(b))
|
|
*result = false;
|
|
else
|
|
{
|
|
int32 i;
|
|
BITVECP sa = GETSIGN(a),
|
|
sb = GETSIGN(b);
|
|
|
|
*result = true;
|
|
LOOPBYTE
|
|
{
|
|
if (sa[i] != sb[i])
|
|
{
|
|
*result = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
PG_RETURN_POINTER(result);
|
|
}
|
|
|
|
Datum
|
|
g_intbig_compress(PG_FUNCTION_ARGS)
|
|
{
|
|
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
|
|
|
|
if (entry->leafkey)
|
|
{
|
|
GISTENTRY *retval;
|
|
ArrayType *in = DatumGetArrayTypeP(entry->key);
|
|
int32 *ptr;
|
|
int num;
|
|
GISTTYPE *res = (GISTTYPE *) palloc0(CALCGTSIZE(0));
|
|
|
|
CHECKARRVALID(in);
|
|
if (ARRISEMPTY(in))
|
|
{
|
|
ptr = NULL;
|
|
num = 0;
|
|
}
|
|
else
|
|
{
|
|
ptr = ARRPTR(in);
|
|
num = ARRNELEMS(in);
|
|
}
|
|
SET_VARSIZE(res, CALCGTSIZE(0));
|
|
|
|
while (num--)
|
|
{
|
|
HASH(GETSIGN(res), *ptr);
|
|
ptr++;
|
|
}
|
|
|
|
retval = (GISTENTRY *) palloc(sizeof(GISTENTRY));
|
|
gistentryinit(*retval, PointerGetDatum(res),
|
|
entry->rel, entry->page,
|
|
entry->offset, FALSE);
|
|
|
|
if (in != DatumGetArrayTypeP(entry->key))
|
|
pfree(in);
|
|
|
|
PG_RETURN_POINTER(retval);
|
|
}
|
|
else if (!ISALLTRUE(DatumGetPointer(entry->key)))
|
|
{
|
|
GISTENTRY *retval;
|
|
int i;
|
|
BITVECP sign = GETSIGN(DatumGetPointer(entry->key));
|
|
GISTTYPE *res;
|
|
|
|
LOOPBYTE
|
|
{
|
|
if ((sign[i] & 0xff) != 0xff)
|
|
PG_RETURN_POINTER(entry);
|
|
}
|
|
|
|
res = (GISTTYPE *) palloc(CALCGTSIZE(ALLISTRUE));
|
|
SET_VARSIZE(res, CALCGTSIZE(ALLISTRUE));
|
|
res->flag = ALLISTRUE;
|
|
|
|
retval = (GISTENTRY *) palloc(sizeof(GISTENTRY));
|
|
gistentryinit(*retval, PointerGetDatum(res),
|
|
entry->rel, entry->page,
|
|
entry->offset, FALSE);
|
|
|
|
PG_RETURN_POINTER(retval);
|
|
}
|
|
|
|
PG_RETURN_POINTER(entry);
|
|
}
|
|
|
|
|
|
static int32
|
|
sizebitvec(BITVECP sign)
|
|
{
|
|
int32 size = 0,
|
|
i;
|
|
|
|
LOOPBYTE
|
|
size += number_of_ones[(unsigned char) sign[i]];
|
|
return size;
|
|
}
|
|
|
|
static int
|
|
hemdistsign(BITVECP a, BITVECP b)
|
|
{
|
|
int i,
|
|
diff,
|
|
dist = 0;
|
|
|
|
LOOPBYTE
|
|
{
|
|
diff = (unsigned char) (a[i] ^ b[i]);
|
|
dist += number_of_ones[diff];
|
|
}
|
|
return dist;
|
|
}
|
|
|
|
static int
|
|
hemdist(GISTTYPE *a, GISTTYPE *b)
|
|
{
|
|
if (ISALLTRUE(a))
|
|
{
|
|
if (ISALLTRUE(b))
|
|
return 0;
|
|
else
|
|
return SIGLENBIT - sizebitvec(GETSIGN(b));
|
|
}
|
|
else if (ISALLTRUE(b))
|
|
return SIGLENBIT - sizebitvec(GETSIGN(a));
|
|
|
|
return hemdistsign(GETSIGN(a), GETSIGN(b));
|
|
}
|
|
|
|
Datum
|
|
g_intbig_decompress(PG_FUNCTION_ARGS)
|
|
{
|
|
PG_RETURN_DATUM(PG_GETARG_DATUM(0));
|
|
}
|
|
|
|
static int32
|
|
unionkey(BITVECP sbase, GISTTYPE *add)
|
|
{
|
|
int32 i;
|
|
BITVECP sadd = GETSIGN(add);
|
|
|
|
if (ISALLTRUE(add))
|
|
return 1;
|
|
LOOPBYTE
|
|
sbase[i] |= sadd[i];
|
|
return 0;
|
|
}
|
|
|
|
Datum
|
|
g_intbig_union(PG_FUNCTION_ARGS)
|
|
{
|
|
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
|
|
int *size = (int *) PG_GETARG_POINTER(1);
|
|
BITVEC base;
|
|
int32 i,
|
|
len;
|
|
int32 flag = 0;
|
|
GISTTYPE *result;
|
|
|
|
MemSet((void *) base, 0, sizeof(BITVEC));
|
|
for (i = 0; i < entryvec->n; i++)
|
|
{
|
|
if (unionkey(base, GETENTRY(entryvec, i)))
|
|
{
|
|
flag = ALLISTRUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
len = CALCGTSIZE(flag);
|
|
result = (GISTTYPE *) palloc(len);
|
|
SET_VARSIZE(result, len);
|
|
result->flag = flag;
|
|
if (!ISALLTRUE(result))
|
|
memcpy((void *) GETSIGN(result), (void *) base, sizeof(BITVEC));
|
|
*size = len;
|
|
|
|
PG_RETURN_POINTER(result);
|
|
}
|
|
|
|
Datum
|
|
g_intbig_penalty(PG_FUNCTION_ARGS)
|
|
{
|
|
GISTENTRY *origentry = (GISTENTRY *) PG_GETARG_POINTER(0); /* always ISSIGNKEY */
|
|
GISTENTRY *newentry = (GISTENTRY *) PG_GETARG_POINTER(1);
|
|
float *penalty = (float *) PG_GETARG_POINTER(2);
|
|
GISTTYPE *origval = (GISTTYPE *) DatumGetPointer(origentry->key);
|
|
GISTTYPE *newval = (GISTTYPE *) DatumGetPointer(newentry->key);
|
|
|
|
*penalty = hemdist(origval, newval);
|
|
PG_RETURN_POINTER(penalty);
|
|
}
|
|
|
|
|
|
typedef struct
|
|
{
|
|
OffsetNumber pos;
|
|
int32 cost;
|
|
} SPLITCOST;
|
|
|
|
static int
|
|
comparecost(const void *a, const void *b)
|
|
{
|
|
return ((const SPLITCOST *) a)->cost - ((const SPLITCOST *) b)->cost;
|
|
}
|
|
|
|
|
|
Datum
|
|
g_intbig_picksplit(PG_FUNCTION_ARGS)
|
|
{
|
|
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
|
|
GIST_SPLITVEC *v = (GIST_SPLITVEC *) PG_GETARG_POINTER(1);
|
|
OffsetNumber k,
|
|
j;
|
|
GISTTYPE *datum_l,
|
|
*datum_r;
|
|
BITVECP union_l,
|
|
union_r;
|
|
int32 size_alpha,
|
|
size_beta;
|
|
int32 size_waste,
|
|
waste = -1;
|
|
int32 nbytes;
|
|
OffsetNumber seed_1 = 0,
|
|
seed_2 = 0;
|
|
OffsetNumber *left,
|
|
*right;
|
|
OffsetNumber maxoff;
|
|
BITVECP ptr;
|
|
int i;
|
|
SPLITCOST *costvector;
|
|
GISTTYPE *_k,
|
|
*_j;
|
|
|
|
maxoff = entryvec->n - 2;
|
|
nbytes = (maxoff + 2) * sizeof(OffsetNumber);
|
|
v->spl_left = (OffsetNumber *) palloc(nbytes);
|
|
v->spl_right = (OffsetNumber *) palloc(nbytes);
|
|
|
|
for (k = FirstOffsetNumber; k < maxoff; k = OffsetNumberNext(k))
|
|
{
|
|
_k = GETENTRY(entryvec, k);
|
|
for (j = OffsetNumberNext(k); j <= maxoff; j = OffsetNumberNext(j))
|
|
{
|
|
size_waste = hemdist(_k, GETENTRY(entryvec, j));
|
|
if (size_waste > waste)
|
|
{
|
|
waste = size_waste;
|
|
seed_1 = k;
|
|
seed_2 = j;
|
|
}
|
|
}
|
|
}
|
|
|
|
left = v->spl_left;
|
|
v->spl_nleft = 0;
|
|
right = v->spl_right;
|
|
v->spl_nright = 0;
|
|
|
|
if (seed_1 == 0 || seed_2 == 0)
|
|
{
|
|
seed_1 = 1;
|
|
seed_2 = 2;
|
|
}
|
|
|
|
/* form initial .. */
|
|
if (ISALLTRUE(GETENTRY(entryvec, seed_1)))
|
|
{
|
|
datum_l = (GISTTYPE *) palloc(GTHDRSIZE);
|
|
SET_VARSIZE(datum_l, GTHDRSIZE);
|
|
datum_l->flag = ALLISTRUE;
|
|
}
|
|
else
|
|
{
|
|
datum_l = (GISTTYPE *) palloc(GTHDRSIZE + SIGLEN);
|
|
SET_VARSIZE(datum_l, GTHDRSIZE + SIGLEN);
|
|
datum_l->flag = 0;
|
|
memcpy((void *) GETSIGN(datum_l), (void *) GETSIGN(GETENTRY(entryvec, seed_1)), sizeof(BITVEC));
|
|
}
|
|
if (ISALLTRUE(GETENTRY(entryvec, seed_2)))
|
|
{
|
|
datum_r = (GISTTYPE *) palloc(GTHDRSIZE);
|
|
SET_VARSIZE(datum_r, GTHDRSIZE);
|
|
datum_r->flag = ALLISTRUE;
|
|
}
|
|
else
|
|
{
|
|
datum_r = (GISTTYPE *) palloc(GTHDRSIZE + SIGLEN);
|
|
SET_VARSIZE(datum_r, GTHDRSIZE + SIGLEN);
|
|
datum_r->flag = 0;
|
|
memcpy((void *) GETSIGN(datum_r), (void *) GETSIGN(GETENTRY(entryvec, seed_2)), sizeof(BITVEC));
|
|
}
|
|
|
|
maxoff = OffsetNumberNext(maxoff);
|
|
/* sort before ... */
|
|
costvector = (SPLITCOST *) palloc(sizeof(SPLITCOST) * maxoff);
|
|
for (j = FirstOffsetNumber; j <= maxoff; j = OffsetNumberNext(j))
|
|
{
|
|
costvector[j - 1].pos = j;
|
|
_j = GETENTRY(entryvec, j);
|
|
size_alpha = hemdist(datum_l, _j);
|
|
size_beta = hemdist(datum_r, _j);
|
|
costvector[j - 1].cost = Abs(size_alpha - size_beta);
|
|
}
|
|
qsort((void *) costvector, maxoff, sizeof(SPLITCOST), comparecost);
|
|
|
|
union_l = GETSIGN(datum_l);
|
|
union_r = GETSIGN(datum_r);
|
|
|
|
for (k = 0; k < maxoff; k++)
|
|
{
|
|
j = costvector[k].pos;
|
|
if (j == seed_1)
|
|
{
|
|
*left++ = j;
|
|
v->spl_nleft++;
|
|
continue;
|
|
}
|
|
else if (j == seed_2)
|
|
{
|
|
*right++ = j;
|
|
v->spl_nright++;
|
|
continue;
|
|
}
|
|
_j = GETENTRY(entryvec, j);
|
|
size_alpha = hemdist(datum_l, _j);
|
|
size_beta = hemdist(datum_r, _j);
|
|
|
|
if (size_alpha < size_beta + WISH_F(v->spl_nleft, v->spl_nright, 0.00001))
|
|
{
|
|
if (ISALLTRUE(datum_l) || ISALLTRUE(_j))
|
|
{
|
|
if (!ISALLTRUE(datum_l))
|
|
MemSet((void *) union_l, 0xff, sizeof(BITVEC));
|
|
}
|
|
else
|
|
{
|
|
ptr = GETSIGN(_j);
|
|
LOOPBYTE
|
|
union_l[i] |= ptr[i];
|
|
}
|
|
*left++ = j;
|
|
v->spl_nleft++;
|
|
}
|
|
else
|
|
{
|
|
if (ISALLTRUE(datum_r) || ISALLTRUE(_j))
|
|
{
|
|
if (!ISALLTRUE(datum_r))
|
|
MemSet((void *) union_r, 0xff, sizeof(BITVEC));
|
|
}
|
|
else
|
|
{
|
|
ptr = GETSIGN(_j);
|
|
LOOPBYTE
|
|
union_r[i] |= ptr[i];
|
|
}
|
|
*right++ = j;
|
|
v->spl_nright++;
|
|
}
|
|
}
|
|
|
|
*right = *left = FirstOffsetNumber;
|
|
pfree(costvector);
|
|
|
|
v->spl_ldatum = PointerGetDatum(datum_l);
|
|
v->spl_rdatum = PointerGetDatum(datum_r);
|
|
|
|
PG_RETURN_POINTER(v);
|
|
}
|
|
|
|
Datum
|
|
g_intbig_consistent(PG_FUNCTION_ARGS)
|
|
{
|
|
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
|
|
ArrayType *query = PG_GETARG_ARRAYTYPE_P(1);
|
|
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
|
|
|
|
/* Oid subtype = PG_GETARG_OID(3); */
|
|
bool *recheck = (bool *) PG_GETARG_POINTER(4);
|
|
bool retval;
|
|
|
|
/* All cases served by this function are inexact */
|
|
*recheck = true;
|
|
|
|
if (ISALLTRUE(DatumGetPointer(entry->key)))
|
|
PG_RETURN_BOOL(true);
|
|
|
|
if (strategy == BooleanSearchStrategy)
|
|
{
|
|
retval = signconsistent((QUERYTYPE *) query,
|
|
GETSIGN(DatumGetPointer(entry->key)),
|
|
false);
|
|
PG_FREE_IF_COPY(query, 1);
|
|
PG_RETURN_BOOL(retval);
|
|
}
|
|
|
|
CHECKARRVALID(query);
|
|
|
|
switch (strategy)
|
|
{
|
|
case RTOverlapStrategyNumber:
|
|
retval = _intbig_overlap((GISTTYPE *) DatumGetPointer(entry->key), query);
|
|
break;
|
|
case RTSameStrategyNumber:
|
|
if (GIST_LEAF(entry))
|
|
{
|
|
int i,
|
|
num = ARRNELEMS(query);
|
|
int32 *ptr = ARRPTR(query);
|
|
BITVEC qp;
|
|
BITVECP dq,
|
|
de;
|
|
|
|
memset(qp, 0, sizeof(BITVEC));
|
|
|
|
while (num--)
|
|
{
|
|
HASH(qp, *ptr);
|
|
ptr++;
|
|
}
|
|
|
|
de = GETSIGN((GISTTYPE *) DatumGetPointer(entry->key));
|
|
dq = qp;
|
|
retval = true;
|
|
LOOPBYTE
|
|
{
|
|
if (de[i] != dq[i])
|
|
{
|
|
retval = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
}
|
|
else
|
|
retval = _intbig_contains((GISTTYPE *) DatumGetPointer(entry->key), query);
|
|
break;
|
|
case RTContainsStrategyNumber:
|
|
case RTOldContainsStrategyNumber:
|
|
retval = _intbig_contains((GISTTYPE *) DatumGetPointer(entry->key), query);
|
|
break;
|
|
case RTContainedByStrategyNumber:
|
|
case RTOldContainedByStrategyNumber:
|
|
if (GIST_LEAF(entry))
|
|
{
|
|
int i,
|
|
num = ARRNELEMS(query);
|
|
int32 *ptr = ARRPTR(query);
|
|
BITVEC qp;
|
|
BITVECP dq,
|
|
de;
|
|
|
|
memset(qp, 0, sizeof(BITVEC));
|
|
|
|
while (num--)
|
|
{
|
|
HASH(qp, *ptr);
|
|
ptr++;
|
|
}
|
|
|
|
de = GETSIGN((GISTTYPE *) DatumGetPointer(entry->key));
|
|
dq = qp;
|
|
retval = true;
|
|
LOOPBYTE
|
|
{
|
|
if (de[i] & ~dq[i])
|
|
{
|
|
retval = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
retval = _intbig_overlap((GISTTYPE *) DatumGetPointer(entry->key), query);
|
|
break;
|
|
default:
|
|
retval = FALSE;
|
|
}
|
|
PG_FREE_IF_COPY(query, 1);
|
|
PG_RETURN_BOOL(retval);
|
|
}
|