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postgres/src/backend/utils/adt/tsgistidx.c
Teodor Sigaev e5be89981f Refactoring by Heikki Linnakangas <heikki@enterprisedb.com> with 
small editorization by me

- Brake the QueryItem struct into QueryOperator and QueryOperand.
  Type was really the only common field between them. QueryItem still
  exists, and is used in the TSQuery struct as before, but it's now a
  union of the two. Many other changes fell from that, like separation
  of pushval_asis function into pushValue, pushOperator and pushStop.

- Moved some structs that were for internal use only from header files
  to the right .c-files.

- Moved tsvector parser to a new tsvector_parser.c file. Parser code was
  about half of the size of tsvector.c, it's also used from tsquery.c, and
  it has some data structures of its own, so it seems better to separate
  it. Cleaned up the API so that TSVectorParserState is not accessed from
  outside tsvector_parser.c.

- Separated enumerations (#defines, really) used for QueryItem.type
  field and as return codes from gettoken_query. It was just accidental
  code sharing.

- Removed ParseQueryNode struct used internally by makepol and friends.
  push*-functions now construct QueryItems directly.

- Changed int4 variables to just ints for variables like "i" or "array
  size", where the storage-size was not significant.
2007-09-07 15:09:56 +00:00

785 lines
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/*-------------------------------------------------------------------------
*
* tsgistidx.c
* GiST support functions for tsvector_ops
*
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/tsgistidx.c,v 1.3 2007/09/07 15:09:56 teodor Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/gist.h"
#include "access/tuptoaster.h"
#include "tsearch/ts_type.h"
#include "tsearch/ts_utils.h"
#include "utils/pg_crc.h"
#define SIGLENINT 31 /* >121 => key will toast, so it will not work
* !!! */
#define SIGLEN ( sizeof(int4) * SIGLENINT )
#define SIGLENBIT (SIGLEN * BITS_PER_BYTE)
typedef char BITVEC[SIGLEN];
typedef char *BITVECP;
#define LOOPBYTE(a) \
for(i=0;i<SIGLEN;i++) {\
a;\
}
#define GETBYTE(x,i) ( *( (BITVECP)(x) + (int)( (i) / BITS_PER_BYTE ) ) )
#define GETBITBYTE(x,i) ( ((char)(x)) >> (i) & 0x01 )
#define CLRBIT(x,i) GETBYTE(x,i) &= ~( 0x01 << ( (i) % BITS_PER_BYTE ) )
#define SETBIT(x,i) GETBYTE(x,i) |= ( 0x01 << ( (i) % BITS_PER_BYTE ) )
#define GETBIT(x,i) ( (GETBYTE(x,i) >> ( (i) % BITS_PER_BYTE )) & 0x01 )
#define HASHVAL(val) (((unsigned int)(val)) % SIGLENBIT)
#define HASH(sign, val) SETBIT((sign), HASHVAL(val))
#define GETENTRY(vec,pos) ((SignTSVector *) DatumGetPointer((vec)->vector[(pos)].key))
/*
* type of GiST index key
*/
typedef struct
{
int32 vl_len_; /* varlena header (do not touch directly!) */
int4 flag;
char data[1];
} SignTSVector;
#define ARRKEY 0x01
#define SIGNKEY 0x02
#define ALLISTRUE 0x04
#define ISARRKEY(x) ( ((SignTSVector*)(x))->flag & ARRKEY )
#define ISSIGNKEY(x) ( ((SignTSVector*)(x))->flag & SIGNKEY )
#define ISALLTRUE(x) ( ((SignTSVector*)(x))->flag & ALLISTRUE )
#define GTHDRSIZE ( VARHDRSZ + sizeof(int4) )
#define CALCGTSIZE(flag, len) ( GTHDRSIZE + ( ( (flag) & ARRKEY ) ? ((len)*sizeof(int4)) : (((flag) & ALLISTRUE) ? 0 : SIGLEN) ) )
#define GETSIGN(x) ( (BITVECP)( (char*)(x)+GTHDRSIZE ) )
#define GETARR(x) ( (int4*)( (char*)(x)+GTHDRSIZE ) )
#define ARRNELEM(x) ( ( VARSIZE(x) - GTHDRSIZE )/sizeof(int4) )
/* 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
};
static int4 sizebitvec(BITVECP sign);
Datum
gtsvectorin(PG_FUNCTION_ARGS)
{
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("gtsvector_in not implemented")));
PG_RETURN_DATUM(0);
}
#define SINGOUTSTR "%d true bits, %d false bits"
#define ARROUTSTR "%d unique words"
#define EXTRALEN ( 2*13 )
static int outbuf_maxlen = 0;
Datum
gtsvectorout(PG_FUNCTION_ARGS)
{
SignTSVector *key = (SignTSVector *) DatumGetPointer(PG_DETOAST_DATUM(PG_GETARG_POINTER(0)));
char *outbuf;
if (outbuf_maxlen == 0)
outbuf_maxlen = 2 * EXTRALEN + Max(strlen(SINGOUTSTR), strlen(ARROUTSTR)) + 1;
outbuf = palloc(outbuf_maxlen);
if (ISARRKEY(key))
sprintf(outbuf, ARROUTSTR, (int) ARRNELEM(key));
else
{
int cnttrue = (ISALLTRUE(key)) ? SIGLENBIT : sizebitvec(GETSIGN(key));
sprintf(outbuf, SINGOUTSTR, cnttrue, (int) SIGLENBIT - cnttrue);
}
PG_FREE_IF_COPY(key, 0);
PG_RETURN_POINTER(outbuf);
}
static int
compareint(const void *a, const void *b)
{
if (*((int4 *) a) == *((int4 *) b))
return 0;
return (*((int4 *) a) > *((int4 *) b)) ? 1 : -1;
}
static int
uniqueint(int4 *a, int4 l)
{
int4 *ptr,
*res;
if (l == 1)
return l;
ptr = res = a;
qsort((void *) a, l, sizeof(int4), compareint);
while (ptr - a < l)
if (*ptr != *res)
*(++res) = *ptr++;
else
ptr++;
return res + 1 - a;
}
static void
makesign(BITVECP sign, SignTSVector * a)
{
int4 k,
len = ARRNELEM(a);
int4 *ptr = GETARR(a);
MemSet((void *) sign, 0, sizeof(BITVEC));
for (k = 0; k < len; k++)
HASH(sign, ptr[k]);
}
Datum
gtsvector_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
GISTENTRY *retval = entry;
if (entry->leafkey)
{ /* tsvector */
SignTSVector *res;
TSVector val = DatumGetTSVector(entry->key);
int4 len;
int4 *arr;
WordEntry *ptr = ARRPTR(val);
char *words = STRPTR(val);
len = CALCGTSIZE(ARRKEY, val->size);
res = (SignTSVector *) palloc(len);
SET_VARSIZE(res, len);
res->flag = ARRKEY;
arr = GETARR(res);
len = val->size;
while (len--)
{
pg_crc32 c;
INIT_CRC32(c);
COMP_CRC32(c, words + ptr->pos, ptr->len);
FIN_CRC32(c);
*arr = *(int4 *) &c;
arr++;
ptr++;
}
len = uniqueint(GETARR(res), val->size);
if (len != val->size)
{
/*
* there is a collision of hash-function; len is always less than
* val->size
*/
len = CALCGTSIZE(ARRKEY, len);
res = (SignTSVector *) repalloc((void *) res, len);
SET_VARSIZE(res, len);
}
/* make signature, if array is too long */
if (VARSIZE(res) > TOAST_INDEX_TARGET)
{
SignTSVector *ressign;
len = CALCGTSIZE(SIGNKEY, 0);
ressign = (SignTSVector *) palloc(len);
SET_VARSIZE(ressign, len);
ressign->flag = SIGNKEY;
makesign(GETSIGN(ressign), res);
res = ressign;
}
retval = (GISTENTRY *) palloc(sizeof(GISTENTRY));
gistentryinit(*retval, PointerGetDatum(res),
entry->rel, entry->page,
entry->offset, FALSE);
}
else if (ISSIGNKEY(DatumGetPointer(entry->key)) &&
!ISALLTRUE(DatumGetPointer(entry->key)))
{
int4 i,
len;
SignTSVector *res;
BITVECP sign = GETSIGN(DatumGetPointer(entry->key));
LOOPBYTE(
if ((sign[i] & 0xff) != 0xff)
PG_RETURN_POINTER(retval);
);
len = CALCGTSIZE(SIGNKEY | ALLISTRUE, 0);
res = (SignTSVector *) palloc(len);
SET_VARSIZE(res, len);
res->flag = SIGNKEY | ALLISTRUE;
retval = (GISTENTRY *) palloc(sizeof(GISTENTRY));
gistentryinit(*retval, PointerGetDatum(res),
entry->rel, entry->page,
entry->offset, FALSE);
}
PG_RETURN_POINTER(retval);
}
Datum
gtsvector_decompress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
SignTSVector *key = (SignTSVector *) DatumGetPointer(PG_DETOAST_DATUM(entry->key));
if (key != (SignTSVector *) DatumGetPointer(entry->key))
{
GISTENTRY *retval = (GISTENTRY *) palloc(sizeof(GISTENTRY));
gistentryinit(*retval, PointerGetDatum(key),
entry->rel, entry->page,
entry->offset, FALSE);
PG_RETURN_POINTER(retval);
}
PG_RETURN_POINTER(entry);
}
typedef struct
{
int4 *arrb;
int4 *arre;
} CHKVAL;
/*
* is there value 'val' in array or not ?
*/
static bool
checkcondition_arr(void *checkval, QueryOperand * val)
{
int4 *StopLow = ((CHKVAL *) checkval)->arrb;
int4 *StopHigh = ((CHKVAL *) checkval)->arre;
int4 *StopMiddle;
/* Loop invariant: StopLow <= val < StopHigh */
while (StopLow < StopHigh)
{
StopMiddle = StopLow + (StopHigh - StopLow) / 2;
if (*StopMiddle == val->valcrc)
return (true);
else if (*StopMiddle < val->valcrc)
StopLow = StopMiddle + 1;
else
StopHigh = StopMiddle;
}
return (false);
}
static bool
checkcondition_bit(void *checkval, QueryOperand * val)
{
return GETBIT(checkval, HASHVAL(val->valcrc));
}
Datum
gtsvector_consistent(PG_FUNCTION_ARGS)
{
TSQuery query = PG_GETARG_TSQUERY(1);
SignTSVector *key = (SignTSVector *) DatumGetPointer(
((GISTENTRY *) PG_GETARG_POINTER(0))->key
);
if (!query->size)
PG_RETURN_BOOL(false);
if (ISSIGNKEY(key))
{
if (ISALLTRUE(key))
PG_RETURN_BOOL(true);
PG_RETURN_BOOL(TS_execute(
GETQUERY(query),
(void *) GETSIGN(key), false,
checkcondition_bit
));
}
else
{ /* only leaf pages */
CHKVAL chkval;
chkval.arrb = GETARR(key);
chkval.arre = chkval.arrb + ARRNELEM(key);
PG_RETURN_BOOL(TS_execute(
GETQUERY(query),
(void *) &chkval, true,
checkcondition_arr
));
}
}
static int4
unionkey(BITVECP sbase, SignTSVector * add)
{
int4 i;
if (ISSIGNKEY(add))
{
BITVECP sadd = GETSIGN(add);
if (ISALLTRUE(add))
return 1;
LOOPBYTE(
sbase[i] |= sadd[i];
);
}
else
{
int4 *ptr = GETARR(add);
for (i = 0; i < ARRNELEM(add); i++)
HASH(sbase, ptr[i]);
}
return 0;
}
Datum
gtsvector_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
int *size = (int *) PG_GETARG_POINTER(1);
BITVEC base;
int4 i,
len;
int4 flag = 0;
SignTSVector *result;
MemSet((void *) base, 0, sizeof(BITVEC));
for (i = 0; i < entryvec->n; i++)
{
if (unionkey(base, GETENTRY(entryvec, i)))
{
flag = ALLISTRUE;
break;
}
}
flag |= SIGNKEY;
len = CALCGTSIZE(flag, 0);
result = (SignTSVector *) palloc(len);
*size = len;
SET_VARSIZE(result, len);
result->flag = flag;
if (!ISALLTRUE(result))
memcpy((void *) GETSIGN(result), (void *) base, sizeof(BITVEC));
PG_RETURN_POINTER(result);
}
Datum
gtsvector_same(PG_FUNCTION_ARGS)
{
SignTSVector *a = (SignTSVector *) PG_GETARG_POINTER(0);
SignTSVector *b = (SignTSVector *) PG_GETARG_POINTER(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
if (ISSIGNKEY(a))
{ /* then b also ISSIGNKEY */
if (ISALLTRUE(a) && ISALLTRUE(b))
*result = true;
else if (ISALLTRUE(a))
*result = false;
else if (ISALLTRUE(b))
*result = false;
else
{
int4 i;
BITVECP sa = GETSIGN(a),
sb = GETSIGN(b);
*result = true;
LOOPBYTE(
if (sa[i] != sb[i])
{
*result = false;
break;
}
);
}
}
else
{ /* a and b ISARRKEY */
int4 lena = ARRNELEM(a),
lenb = ARRNELEM(b);
if (lena != lenb)
*result = false;
else
{
int4 *ptra = GETARR(a),
*ptrb = GETARR(b);
int4 i;
*result = true;
for (i = 0; i < lena; i++)
if (ptra[i] != ptrb[i])
{
*result = false;
break;
}
}
}
PG_RETURN_POINTER(result);
}
static int4
sizebitvec(BITVECP sign)
{
int4 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(SignTSVector * a, SignTSVector * 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
gtsvector_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);
SignTSVector *origval = (SignTSVector *) DatumGetPointer(origentry->key);
SignTSVector *newval = (SignTSVector *) DatumGetPointer(newentry->key);
BITVECP orig = GETSIGN(origval);
*penalty = 0.0;
if (ISARRKEY(newval))
{
BITVEC sign;
makesign(sign, newval);
if (ISALLTRUE(origval))
*penalty = ((float) (SIGLENBIT - sizebitvec(sign))) / (float) (SIGLENBIT + 1);
else
*penalty = hemdistsign(sign, orig);
}
else
*penalty = hemdist(origval, newval);
PG_RETURN_POINTER(penalty);
}
typedef struct
{
bool allistrue;
BITVEC sign;
} CACHESIGN;
static void
fillcache(CACHESIGN * item, SignTSVector * key)
{
item->allistrue = false;
if (ISARRKEY(key))
makesign(item->sign, key);
else if (ISALLTRUE(key))
item->allistrue = true;
else
memcpy((void *) item->sign, (void *) GETSIGN(key), sizeof(BITVEC));
}
#define WISH_F(a,b,c) (double)( -(double)(((a)-(b))*((a)-(b))*((a)-(b)))*(c) )
typedef struct
{
OffsetNumber pos;
int4 cost;
} SPLITCOST;
static int
comparecost(const void *a, const void *b)
{
if (((SPLITCOST *) a)->cost == ((SPLITCOST *) b)->cost)
return 0;
else
return (((SPLITCOST *) a)->cost > ((SPLITCOST *) b)->cost) ? 1 : -1;
}
static int
hemdistcache(CACHESIGN * a, CACHESIGN * b)
{
if (a->allistrue)
{
if (b->allistrue)
return 0;
else
return SIGLENBIT - sizebitvec(b->sign);
}
else if (b->allistrue)
return SIGLENBIT - sizebitvec(a->sign);
return hemdistsign(a->sign, b->sign);
}
Datum
gtsvector_picksplit(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
GIST_SPLITVEC *v = (GIST_SPLITVEC *) PG_GETARG_POINTER(1);
OffsetNumber k,
j;
SignTSVector *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;
CACHESIGN *cache;
SPLITCOST *costvector;
maxoff = entryvec->n - 2;
nbytes = (maxoff + 2) * sizeof(OffsetNumber);
v->spl_left = (OffsetNumber *) palloc(nbytes);
v->spl_right = (OffsetNumber *) palloc(nbytes);
cache = (CACHESIGN *) palloc(sizeof(CACHESIGN) * (maxoff + 2));
fillcache(&cache[FirstOffsetNumber], GETENTRY(entryvec, FirstOffsetNumber));
for (k = FirstOffsetNumber; k < maxoff; k = OffsetNumberNext(k))
{
for (j = OffsetNumberNext(k); j <= maxoff; j = OffsetNumberNext(j))
{
if (k == FirstOffsetNumber)
fillcache(&cache[j], GETENTRY(entryvec, j));
size_waste = hemdistcache(&(cache[j]), &(cache[k]));
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 (cache[seed_1].allistrue)
{
datum_l = (SignTSVector *) palloc(CALCGTSIZE(SIGNKEY | ALLISTRUE, 0));
SET_VARSIZE(datum_l, CALCGTSIZE(SIGNKEY | ALLISTRUE, 0));
datum_l->flag = SIGNKEY | ALLISTRUE;
}
else
{
datum_l = (SignTSVector *) palloc(CALCGTSIZE(SIGNKEY, 0));
SET_VARSIZE(datum_l, CALCGTSIZE(SIGNKEY, 0));
datum_l->flag = SIGNKEY;
memcpy((void *) GETSIGN(datum_l), (void *) cache[seed_1].sign, sizeof(BITVEC));
}
if (cache[seed_2].allistrue)
{
datum_r = (SignTSVector *) palloc(CALCGTSIZE(SIGNKEY | ALLISTRUE, 0));
SET_VARSIZE(datum_r, CALCGTSIZE(SIGNKEY | ALLISTRUE, 0));
datum_r->flag = SIGNKEY | ALLISTRUE;
}
else
{
datum_r = (SignTSVector *) palloc(CALCGTSIZE(SIGNKEY, 0));
SET_VARSIZE(datum_r, CALCGTSIZE(SIGNKEY, 0));
datum_r->flag = SIGNKEY;
memcpy((void *) GETSIGN(datum_r), (void *) cache[seed_2].sign, sizeof(BITVEC));
}
union_l = GETSIGN(datum_l);
union_r = GETSIGN(datum_r);
maxoff = OffsetNumberNext(maxoff);
fillcache(&cache[maxoff], GETENTRY(entryvec, maxoff));
/* sort before ... */
costvector = (SPLITCOST *) palloc(sizeof(SPLITCOST) * maxoff);
for (j = FirstOffsetNumber; j <= maxoff; j = OffsetNumberNext(j))
{
costvector[j - 1].pos = j;
size_alpha = hemdistcache(&(cache[seed_1]), &(cache[j]));
size_beta = hemdistcache(&(cache[seed_2]), &(cache[j]));
costvector[j - 1].cost = Abs(size_alpha - size_beta);
}
qsort((void *) costvector, maxoff, sizeof(SPLITCOST), comparecost);
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;
}
if (ISALLTRUE(datum_l) || cache[j].allistrue)
{
if (ISALLTRUE(datum_l) && cache[j].allistrue)
size_alpha = 0;
else
size_alpha = SIGLENBIT - sizebitvec(
(cache[j].allistrue) ? GETSIGN(datum_l) : GETSIGN(cache[j].sign)
);
}
else
size_alpha = hemdistsign(cache[j].sign, GETSIGN(datum_l));
if (ISALLTRUE(datum_r) || cache[j].allistrue)
{
if (ISALLTRUE(datum_r) && cache[j].allistrue)
size_beta = 0;
else
size_beta = SIGLENBIT - sizebitvec(
(cache[j].allistrue) ? GETSIGN(datum_r) : GETSIGN(cache[j].sign)
);
}
else
size_beta = hemdistsign(cache[j].sign, GETSIGN(datum_r));
if (size_alpha < size_beta + WISH_F(v->spl_nleft, v->spl_nright, 0.1))
{
if (ISALLTRUE(datum_l) || cache[j].allistrue)
{
if (!ISALLTRUE(datum_l))
MemSet((void *) GETSIGN(datum_l), 0xff, sizeof(BITVEC));
}
else
{
ptr = cache[j].sign;
LOOPBYTE(
union_l[i] |= ptr[i];
);
}
*left++ = j;
v->spl_nleft++;
}
else
{
if (ISALLTRUE(datum_r) || cache[j].allistrue)
{
if (!ISALLTRUE(datum_r))
MemSet((void *) GETSIGN(datum_r), 0xff, sizeof(BITVEC));
}
else
{
ptr = cache[j].sign;
LOOPBYTE(
union_r[i] |= ptr[i];
);
}
*right++ = j;
v->spl_nright++;
}
}
*right = *left = FirstOffsetNumber;
v->spl_ldatum = PointerGetDatum(datum_l);
v->spl_rdatum = PointerGetDatum(datum_r);
PG_RETURN_POINTER(v);
}
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