mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-15 08:20:16 +08:00
380bd04c16
getting rid of numerous ad-hoc versions that have popped up in various places. Shortens code and avoids conflict with Windows min() and max() macros.
574 lines
12 KiB
C
574 lines
12 KiB
C
/*
|
|
* GiST support for ltree[]
|
|
* Teodor Sigaev <teodor@stack.net>
|
|
*/
|
|
|
|
#include "ltree.h"
|
|
#include "access/gist.h"
|
|
#include "access/rtree.h"
|
|
#include "access/nbtree.h"
|
|
#include "utils/array.h"
|
|
|
|
#include "crc32.h"
|
|
|
|
PG_FUNCTION_INFO_V1(_ltree_compress);
|
|
Datum _ltree_compress(PG_FUNCTION_ARGS);
|
|
|
|
PG_FUNCTION_INFO_V1(_ltree_same);
|
|
Datum _ltree_same(PG_FUNCTION_ARGS);
|
|
|
|
PG_FUNCTION_INFO_V1(_ltree_union);
|
|
Datum _ltree_union(PG_FUNCTION_ARGS);
|
|
|
|
PG_FUNCTION_INFO_V1(_ltree_penalty);
|
|
Datum _ltree_penalty(PG_FUNCTION_ARGS);
|
|
|
|
PG_FUNCTION_INFO_V1(_ltree_picksplit);
|
|
Datum _ltree_picksplit(PG_FUNCTION_ARGS);
|
|
|
|
PG_FUNCTION_INFO_V1(_ltree_consistent);
|
|
Datum _ltree_consistent(PG_FUNCTION_ARGS);
|
|
|
|
#define GETENTRY(vec,pos) ((ltree_gist *) DatumGetPointer((vec)->vector[(pos)].key))
|
|
#define NEXTVAL(x) ( (ltree*)( (char*)(x) + INTALIGN( VARSIZE(x) ) ) )
|
|
#define SUMBIT(val) ( \
|
|
GETBITBYTE(val,0) + \
|
|
GETBITBYTE(val,1) + \
|
|
GETBITBYTE(val,2) + \
|
|
GETBITBYTE(val,3) + \
|
|
GETBITBYTE(val,4) + \
|
|
GETBITBYTE(val,5) + \
|
|
GETBITBYTE(val,6) + \
|
|
GETBITBYTE(val,7) \
|
|
)
|
|
#define WISH_F(a,b,c) (double)( -(double)(((a)-(b))*((a)-(b))*((a)-(b)))*(c) )
|
|
|
|
static void
|
|
hashing(BITVECP sign, ltree * t)
|
|
{
|
|
int tlen = t->numlevel;
|
|
ltree_level *cur = LTREE_FIRST(t);
|
|
int hash;
|
|
|
|
while (tlen > 0)
|
|
{
|
|
hash = ltree_crc32_sz(cur->name, cur->len);
|
|
AHASH(sign, hash);
|
|
cur = LEVEL_NEXT(cur);
|
|
tlen--;
|
|
}
|
|
}
|
|
|
|
Datum
|
|
_ltree_compress(PG_FUNCTION_ARGS)
|
|
{
|
|
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
|
|
GISTENTRY *retval = entry;
|
|
|
|
if (entry->leafkey)
|
|
{ /* ltree */
|
|
ltree_gist *key;
|
|
ArrayType *val = DatumGetArrayTypeP(entry->key);
|
|
int4 len = LTG_HDRSIZE + ASIGLEN;
|
|
int num = ArrayGetNItems(ARR_NDIM(val), ARR_DIMS(val));
|
|
ltree *item = (ltree *) ARR_DATA_PTR(val);
|
|
|
|
if (ARR_NDIM(val) != 1)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_ARRAY_SUBSCRIPT_ERROR),
|
|
errmsg("array must be one-dimensional")));
|
|
|
|
key = (ltree_gist *) palloc(len);
|
|
key->len = len;
|
|
key->flag = 0;
|
|
|
|
MemSet(LTG_SIGN(key), 0, sizeof(ASIGLEN));
|
|
while (num > 0)
|
|
{
|
|
hashing(LTG_SIGN(key), item);
|
|
num--;
|
|
item = NEXTVAL(item);
|
|
}
|
|
|
|
if (PointerGetDatum(val) != entry->key)
|
|
pfree(val);
|
|
|
|
retval = (GISTENTRY *) palloc(sizeof(GISTENTRY));
|
|
gistentryinit(*retval, PointerGetDatum(key),
|
|
entry->rel, entry->page,
|
|
entry->offset, key->len, FALSE);
|
|
}
|
|
else if (!LTG_ISALLTRUE(entry->key))
|
|
{
|
|
int4 i,
|
|
len;
|
|
ltree_gist *key;
|
|
|
|
BITVECP sign = LTG_SIGN(DatumGetPointer(entry->key));
|
|
|
|
ALOOPBYTE(
|
|
if ((sign[i] & 0xff) != 0xff)
|
|
PG_RETURN_POINTER(retval);
|
|
);
|
|
len = LTG_HDRSIZE;
|
|
key = (ltree_gist *) palloc(len);
|
|
key->len = len;
|
|
key->flag = LTG_ALLTRUE;
|
|
|
|
retval = (GISTENTRY *) palloc(sizeof(GISTENTRY));
|
|
gistentryinit(*retval, PointerGetDatum(key),
|
|
entry->rel, entry->page,
|
|
entry->offset, key->len, FALSE);
|
|
}
|
|
PG_RETURN_POINTER(retval);
|
|
}
|
|
|
|
Datum
|
|
_ltree_same(PG_FUNCTION_ARGS)
|
|
{
|
|
ltree_gist *a = (ltree_gist *) PG_GETARG_POINTER(0);
|
|
ltree_gist *b = (ltree_gist *) PG_GETARG_POINTER(1);
|
|
bool *result = (bool *) PG_GETARG_POINTER(2);
|
|
|
|
if (LTG_ISALLTRUE(a) && LTG_ISALLTRUE(b))
|
|
*result = true;
|
|
else if (LTG_ISALLTRUE(a))
|
|
*result = false;
|
|
else if (LTG_ISALLTRUE(b))
|
|
*result = false;
|
|
else
|
|
{
|
|
int4 i;
|
|
BITVECP sa = LTG_SIGN(a),
|
|
sb = LTG_SIGN(b);
|
|
|
|
*result = true;
|
|
ALOOPBYTE(
|
|
if (sa[i] != sb[i])
|
|
{
|
|
*result = false;
|
|
break;
|
|
}
|
|
);
|
|
}
|
|
PG_RETURN_POINTER(result);
|
|
}
|
|
|
|
static int4
|
|
unionkey(BITVECP sbase, ltree_gist * add)
|
|
{
|
|
int4 i;
|
|
BITVECP sadd = LTG_SIGN(add);
|
|
|
|
if (LTG_ISALLTRUE(add))
|
|
return 1;
|
|
|
|
ALOOPBYTE(
|
|
sbase[i] |= sadd[i];
|
|
);
|
|
return 0;
|
|
}
|
|
|
|
Datum
|
|
_ltree_union(PG_FUNCTION_ARGS)
|
|
{
|
|
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
|
|
int *size = (int *) PG_GETARG_POINTER(1);
|
|
ABITVEC base;
|
|
int4 i,
|
|
len;
|
|
int4 flag = 0;
|
|
ltree_gist *result;
|
|
|
|
MemSet((void *) base, 0, sizeof(ABITVEC));
|
|
for (i = 0; i < entryvec->n; i++)
|
|
{
|
|
if (unionkey(base, GETENTRY(entryvec, i)))
|
|
{
|
|
flag = LTG_ALLTRUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
len = LTG_HDRSIZE + ((flag & LTG_ALLTRUE) ? 0 : ASIGLEN);
|
|
result = (ltree_gist *) palloc(len);
|
|
*size = result->len = len;
|
|
result->flag = flag;
|
|
if (!LTG_ISALLTRUE(result))
|
|
memcpy((void *) LTG_SIGN(result), (void *) base, sizeof(ABITVEC));
|
|
|
|
PG_RETURN_POINTER(result);
|
|
}
|
|
|
|
static int4
|
|
sizebitvec(BITVECP sign)
|
|
{
|
|
int4 size = 0,
|
|
i;
|
|
|
|
ALOOPBYTE(
|
|
size += SUMBIT(*(char *) sign);
|
|
sign = (BITVECP) (((char *) sign) + 1);
|
|
);
|
|
return size;
|
|
}
|
|
|
|
static int
|
|
hemdistsign(BITVECP a, BITVECP b)
|
|
{
|
|
int i,
|
|
dist = 0;
|
|
|
|
ALOOPBIT(
|
|
if (GETBIT(a, i) != GETBIT(b, i))
|
|
dist++;
|
|
);
|
|
return dist;
|
|
}
|
|
|
|
static int
|
|
hemdist(ltree_gist * a, ltree_gist * b)
|
|
{
|
|
if (LTG_ISALLTRUE(a))
|
|
{
|
|
if (LTG_ISALLTRUE(b))
|
|
return 0;
|
|
else
|
|
return ASIGLENBIT - sizebitvec(LTG_SIGN(b));
|
|
}
|
|
else if (LTG_ISALLTRUE(b))
|
|
return ASIGLENBIT - sizebitvec(LTG_SIGN(a));
|
|
|
|
return hemdistsign(LTG_SIGN(a), LTG_SIGN(b));
|
|
}
|
|
|
|
|
|
Datum
|
|
_ltree_penalty(PG_FUNCTION_ARGS)
|
|
{
|
|
ltree_gist *origval = (ltree_gist *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
|
|
ltree_gist *newval = (ltree_gist *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
|
|
float *penalty = (float *) PG_GETARG_POINTER(2);
|
|
|
|
*penalty = hemdist(origval, newval);
|
|
PG_RETURN_POINTER(penalty);
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
OffsetNumber pos;
|
|
int4 cost;
|
|
} SPLITCOST;
|
|
|
|
static int
|
|
comparecost(const void *a, const void *b)
|
|
{
|
|
return ((SPLITCOST *) a)->cost - ((SPLITCOST *) b)->cost;
|
|
}
|
|
|
|
Datum
|
|
_ltree_picksplit(PG_FUNCTION_ARGS)
|
|
{
|
|
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
|
|
GIST_SPLITVEC *v = (GIST_SPLITVEC *) PG_GETARG_POINTER(1);
|
|
OffsetNumber k,
|
|
j;
|
|
ltree_gist *datum_l,
|
|
*datum_r;
|
|
BITVECP union_l,
|
|
union_r;
|
|
int4 size_alpha,
|
|
size_beta;
|
|
int4 size_waste,
|
|
waste = -1;
|
|
int4 nbytes;
|
|
OffsetNumber seed_1 = 0,
|
|
seed_2 = 0;
|
|
OffsetNumber *left,
|
|
*right;
|
|
OffsetNumber maxoff;
|
|
BITVECP ptr;
|
|
int i;
|
|
SPLITCOST *costvector;
|
|
ltree_gist *_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 (LTG_ISALLTRUE(GETENTRY(entryvec, seed_1)))
|
|
{
|
|
datum_l = (ltree_gist *) palloc(LTG_HDRSIZE);
|
|
datum_l->len = LTG_HDRSIZE;
|
|
datum_l->flag = LTG_ALLTRUE;
|
|
}
|
|
else
|
|
{
|
|
datum_l = (ltree_gist *) palloc(LTG_HDRSIZE + ASIGLEN);
|
|
datum_l->len = LTG_HDRSIZE + ASIGLEN;
|
|
datum_l->flag = 0;
|
|
memcpy((void *) LTG_SIGN(datum_l), (void *) LTG_SIGN(GETENTRY(entryvec, seed_1)), sizeof(ABITVEC));
|
|
}
|
|
if (LTG_ISALLTRUE(GETENTRY(entryvec, seed_2)))
|
|
{
|
|
datum_r = (ltree_gist *) palloc(LTG_HDRSIZE);
|
|
datum_r->len = LTG_HDRSIZE;
|
|
datum_r->flag = LTG_ALLTRUE;
|
|
}
|
|
else
|
|
{
|
|
datum_r = (ltree_gist *) palloc(LTG_HDRSIZE + ASIGLEN);
|
|
datum_r->len = LTG_HDRSIZE + ASIGLEN;
|
|
datum_r->flag = 0;
|
|
memcpy((void *) LTG_SIGN(datum_r), (void *) LTG_SIGN(GETENTRY(entryvec, seed_2)), sizeof(ABITVEC));
|
|
}
|
|
|
|
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 = LTG_SIGN(datum_l);
|
|
union_r = LTG_SIGN(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 (LTG_ISALLTRUE(datum_l) || LTG_ISALLTRUE(_j))
|
|
{
|
|
if (!LTG_ISALLTRUE(datum_l))
|
|
MemSet((void *) union_l, 0xff, sizeof(ABITVEC));
|
|
}
|
|
else
|
|
{
|
|
ptr = LTG_SIGN(_j);
|
|
ALOOPBYTE(
|
|
union_l[i] |= ptr[i];
|
|
);
|
|
}
|
|
*left++ = j;
|
|
v->spl_nleft++;
|
|
}
|
|
else
|
|
{
|
|
if (LTG_ISALLTRUE(datum_r) || LTG_ISALLTRUE(_j))
|
|
{
|
|
if (!LTG_ISALLTRUE(datum_r))
|
|
MemSet((void *) union_r, 0xff, sizeof(ABITVEC));
|
|
}
|
|
else
|
|
{
|
|
ptr = LTG_SIGN(_j);
|
|
ALOOPBYTE(
|
|
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);
|
|
}
|
|
|
|
static bool
|
|
gist_te(ltree_gist * key, ltree * query)
|
|
{
|
|
ltree_level *curq = LTREE_FIRST(query);
|
|
BITVECP sign = LTG_SIGN(key);
|
|
int qlen = query->numlevel;
|
|
unsigned int hv;
|
|
|
|
if (LTG_ISALLTRUE(key))
|
|
return true;
|
|
|
|
while (qlen > 0)
|
|
{
|
|
hv = ltree_crc32_sz(curq->name, curq->len);
|
|
if (!GETBIT(sign, AHASHVAL(hv)))
|
|
return false;
|
|
curq = LEVEL_NEXT(curq);
|
|
qlen--;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
checkcondition_bit(void *checkval, ITEM * val)
|
|
{
|
|
return (FLG_CANLOOKSIGN(val->flag)) ? GETBIT(checkval, AHASHVAL(val->val)) : true;
|
|
}
|
|
|
|
static bool
|
|
gist_qtxt(ltree_gist * key, ltxtquery * query)
|
|
{
|
|
if (LTG_ISALLTRUE(key))
|
|
return true;
|
|
|
|
return ltree_execute(
|
|
GETQUERY(query),
|
|
(void *) LTG_SIGN(key), false,
|
|
checkcondition_bit
|
|
);
|
|
}
|
|
|
|
static bool
|
|
gist_qe(ltree_gist * key, lquery * query)
|
|
{
|
|
lquery_level *curq = LQUERY_FIRST(query);
|
|
BITVECP sign = LTG_SIGN(key);
|
|
int qlen = query->numlevel;
|
|
|
|
if (LTG_ISALLTRUE(key))
|
|
return true;
|
|
|
|
while (qlen > 0)
|
|
{
|
|
if (curq->numvar && LQL_CANLOOKSIGN(curq))
|
|
{
|
|
bool isexist = false;
|
|
int vlen = curq->numvar;
|
|
lquery_variant *curv = LQL_FIRST(curq);
|
|
|
|
while (vlen > 0)
|
|
{
|
|
if (GETBIT(sign, AHASHVAL(curv->val)))
|
|
{
|
|
isexist = true;
|
|
break;
|
|
}
|
|
curv = LVAR_NEXT(curv);
|
|
vlen--;
|
|
}
|
|
if (!isexist)
|
|
return false;
|
|
}
|
|
|
|
curq = LQL_NEXT(curq);
|
|
qlen--;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
_arrq_cons(ltree_gist * key, ArrayType *_query)
|
|
{
|
|
lquery *query = (lquery *) ARR_DATA_PTR(_query);
|
|
int num = ArrayGetNItems(ARR_NDIM(_query), ARR_DIMS(_query));
|
|
|
|
if (ARR_NDIM(_query) != 1)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_ARRAY_SUBSCRIPT_ERROR),
|
|
errmsg("array must be one-dimensional")));
|
|
|
|
while (num > 0)
|
|
{
|
|
if (gist_qe(key, query))
|
|
return true;
|
|
num--;
|
|
query = (lquery *) NEXTVAL(query);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
Datum
|
|
_ltree_consistent(PG_FUNCTION_ARGS)
|
|
{
|
|
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
|
|
char *query = (char *) DatumGetPointer(PG_DETOAST_DATUM(PG_GETARG_DATUM(1)));
|
|
ltree_gist *key = (ltree_gist *) DatumGetPointer(entry->key);
|
|
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
|
|
bool res = false;
|
|
|
|
#ifndef assert_enabled
|
|
#define assert_enabled 0
|
|
#endif
|
|
|
|
switch (strategy)
|
|
{
|
|
case 10:
|
|
case 11:
|
|
res = gist_te(key, (ltree *) query);
|
|
break;
|
|
case 12:
|
|
case 13:
|
|
res = gist_qe(key, (lquery *) query);
|
|
break;
|
|
case 14:
|
|
case 15:
|
|
res = gist_qtxt(key, (ltxtquery *) query);
|
|
break;
|
|
case 16:
|
|
case 17:
|
|
res = _arrq_cons(key, (ArrayType *) query);
|
|
break;
|
|
default:
|
|
/* internal error */
|
|
elog(ERROR, "unrecognized StrategyNumber: %d", strategy);
|
|
}
|
|
PG_RETURN_BOOL(res);
|
|
}
|