#include "postgres.h"
#include "access/gist.h"
#include "access/skey.h"
#include "catalog/pg_type.h"
#include "crc32.h"
#include "hstore.h"

Include dependency graph for hstore_gist.c:

Data Structures
struct	GISTTYPE
struct	SPLITCOST
Defines
#define	BITBYTE 8
#define	SIGLENINT 4
#define	SIGLEN ( sizeof(int)*SIGLENINT )
#define	SIGLENBIT (SIGLEN*BITBYTE)
#define	SIGPTR(x) ( (BITVECP) ARR_DATA_PTR(x) )
#define	LOOPBYTE for(i=0;i<SIGLEN;i++)
#define	LOOPBIT for(i=0;i<SIGLENBIT;i++)
#define	GETBYTE(x, i) ( *( (BITVECP)(x) + (int)( (i) / BITBYTE ) ) )
#define	GETBITBYTE(x, i) ( (((char)(x)) >> (i)) & 0x01 )
#define	CLRBIT(x, i) GETBYTE(x,i) &= ~( 0x01 << ( (i) % BITBYTE ) )
#define	SETBIT(x, i) GETBYTE(x,i) \|= ( 0x01 << ( (i) % BITBYTE ) )
#define	GETBIT(x, i) ( (GETBYTE(x,i) >> ( (i) % BITBYTE )) & 0x01 )
#define	HASHVAL(val) (((unsigned int)(val)) % SIGLENBIT)
#define	HASH(sign, val) SETBIT((sign), HASHVAL(val))
#define	ALLISTRUE 0x04
#define	ISALLTRUE(x) ( ((GISTTYPE*)x)->flag & ALLISTRUE )
#define	GTHDRSIZE (VARHDRSZ + sizeof(int32))
#define	CALCGTSIZE(flag) ( GTHDRSIZE+(((flag) & ALLISTRUE) ? 0 : SIGLEN) )
#define	GETSIGN(x) ( (BITVECP)( (char*)x+GTHDRSIZE ) )
#define	SUMBIT(val)
#define	GETENTRY(vec, pos) ((GISTTYPE *) DatumGetPointer((vec)->vector[(pos)].key))
#define	WISH_F(a, b, c) (double)( -(double)(((a)-(b))((a)-(b))((a)-(b)))*(c) )
Typedefs
typedef char	BITVEC [SIGLEN]
typedef char *	BITVECP
Functions
	PG_FUNCTION_INFO_V1 (ghstore_in)
Datum	ghstore_in (PG_FUNCTION_ARGS)
	PG_FUNCTION_INFO_V1 (ghstore_out)
Datum	ghstore_out (PG_FUNCTION_ARGS)
	PG_FUNCTION_INFO_V1 (ghstore_consistent)
	PG_FUNCTION_INFO_V1 (ghstore_compress)
	PG_FUNCTION_INFO_V1 (ghstore_decompress)
	PG_FUNCTION_INFO_V1 (ghstore_penalty)
	PG_FUNCTION_INFO_V1 (ghstore_picksplit)
	PG_FUNCTION_INFO_V1 (ghstore_union)
	PG_FUNCTION_INFO_V1 (ghstore_same)
Datum	ghstore_consistent (PG_FUNCTION_ARGS)
Datum	ghstore_compress (PG_FUNCTION_ARGS)
Datum	ghstore_decompress (PG_FUNCTION_ARGS)
Datum	ghstore_penalty (PG_FUNCTION_ARGS)
Datum	ghstore_picksplit (PG_FUNCTION_ARGS)
Datum	ghstore_union (PG_FUNCTION_ARGS)
Datum	ghstore_same (PG_FUNCTION_ARGS)
static int32	sizebitvec (BITVECP sign)
static int	hemdistsign (BITVECP a, BITVECP b)
static int	hemdist (GISTTYPE a, GISTTYPE b)
static int32	unionkey (BITVECP sbase, GISTTYPE *add)
static int	comparecost (const void a, const void b)

Define Documentation

#define ALLISTRUE 0x04

Definition at line 47 of file hstore_gist.c.

Referenced by g_intbig_compress(), ghstore_compress(), gtrgm_compress(), and gtrgm_picksplit().

#define BITBYTE 8

Definition at line 14 of file hstore_gist.c.

#define CALCGTSIZE ( flag ) ( GTHDRSIZE+(((flag) & ALLISTRUE) ? 0 : SIGLEN) )

Definition at line 52 of file hstore_gist.c.

Referenced by expandColorTrigrams(), g_intbig_compress(), g_intbig_union(), generate_trgm(), generate_wildcard_trgm(), ghstore_compress(), ghstore_union(), gtrgm_compress(), gtrgm_picksplit(), and gtrgm_union().

#define CLRBIT	(	x,
		i
	)		GETBYTE(x,i) &= ~( 0x01 << ( (i) % BITBYTE ) )

Definition at line 34 of file hstore_gist.c.

Referenced by _hash_freeovflpage().

#define GETBIT	(	x,
		i
	)		( (GETBYTE(x,i) >> ( (i) % BITBYTE )) & 0x01 )

Definition at line 36 of file hstore_gist.c.

Referenced by _intbig_contains(), _intbig_overlap(), checkcondition_bit(), cnt_sml_sign_common(), ghstore_consistent(), gist_qe(), gist_te(), gtrgm_consistent(), and hemdistsign().

#define GETBITBYTE	(	x,
		i
	)		( (((char)(x)) >> (i)) & 0x01 )

Definition at line 33 of file hstore_gist.c.

#define GETBYTE	(	x,
		i
	)		( *( (BITVECP)(x) + (int)( (i) / BITBYTE ) ) )

Definition at line 32 of file hstore_gist.c.

Referenced by _pgp_read_public_key(), parse_compressed_data(), parse_literal_data(), parse_new_len(), parse_old_len(), parse_symenc_mdc_data(), parse_symenc_sesskey(), pgp_parse_pubenc_sesskey(), pgp_s2k_read(), process_secret_key(), and read_pubenc_keyid().

#define GETENTRY	(	vec,
		pos
	)		((GISTTYPE *) DatumGetPointer((vec)->vector[(pos)].key))

Definition at line 67 of file hstore_gist.c.

Referenced by ghstore_picksplit(), and ghstore_union().

#define GETSIGN ( x ) ( (BITVECP)( (char*)x+GTHDRSIZE ) )

Definition at line 54 of file hstore_gist.c.

Referenced by _intbig_contains(), _intbig_overlap(), fillcache(), g_intbig_compress(), g_intbig_consistent(), g_intbig_picksplit(), g_intbig_same(), g_intbig_union(), ghstore_compress(), ghstore_consistent(), ghstore_picksplit(), ghstore_same(), ghstore_union(), gtrgm_compress(), gtrgm_consistent(), gtrgm_distance(), gtrgm_penalty(), gtrgm_picksplit(), gtrgm_same(), gtrgm_union(), hemdist(), and unionkey().

#define GTHDRSIZE (VARHDRSZ + sizeof(int32))

Definition at line 51 of file hstore_gist.c.

Referenced by g_intbig_picksplit(), and ghstore_picksplit().

#define HASH	(	sign,
		val
	)		SETBIT((sign), HASHVAL(val))

Definition at line 38 of file hstore_gist.c.

Referenced by g_intbig_compress(), g_intbig_consistent(), gensign(), ghstore_compress(), hashing(), initialize(), makesign(), miss(), and unionkey().

#define HASHVAL ( val ) (((unsigned int)(val)) % SIGLENBIT)

Definition at line 37 of file hstore_gist.c.

Referenced by _intbig_contains(), _intbig_overlap(), checkcondition_bit(), cnt_sml_sign_common(), ghstore_consistent(), gist_qe(), and gtrgm_consistent().

#define ISALLTRUE ( x ) ( ((GISTTYPE*)x)->flag & ALLISTRUE )

Definition at line 49 of file hstore_gist.c.

Referenced by fillcache(), g_intbig_compress(), g_intbig_consistent(), g_intbig_picksplit(), g_intbig_same(), g_intbig_union(), ghstore_compress(), ghstore_consistent(), ghstore_picksplit(), ghstore_same(), ghstore_union(), gtrgm_compress(), gtrgm_consistent(), gtrgm_distance(), gtrgm_penalty(), gtrgm_picksplit(), gtrgm_same(), gtrgm_union(), hemdist(), and unionkey().

#define LOOPBIT for(i=0;i<SIGLENBIT;i++)

Definition at line 28 of file hstore_gist.c.

Referenced by hemdistsign().

#define LOOPBYTE for(i=0;i<SIGLEN;i++)

Definition at line 25 of file hstore_gist.c.

Referenced by g_intbig_compress(), g_intbig_consistent(), g_intbig_picksplit(), g_intbig_same(), ghstore_compress(), ghstore_picksplit(), ghstore_same(), gtrgm_compress(), gtrgm_picksplit(), gtrgm_same(), hemdistsign(), ltree_picksplit(), ltree_same(), ltree_union(), sizebitvec(), and unionkey().

#define SETBIT	(	x,
		i
	)		GETBYTE(x,i) \|= ( 0x01 << ( (i) % BITBYTE ) )

Definition at line 35 of file hstore_gist.c.

Referenced by _hash_getovflpage(), and makesign().

#define SIGLEN ( sizeof(int)*SIGLENINT )

Definition at line 16 of file hstore_gist.c.

Referenced by g_intbig_picksplit(), ghstore_picksplit(), ltree_picksplit(), and ltree_union().

#define SIGLENBIT (SIGLEN*BITBYTE)

Definition at line 17 of file hstore_gist.c.

Referenced by gtrgm_penalty(), gtrgm_picksplit(), hemdist(), hemdistcache(), and makesign().

#define SIGLENINT 4

Definition at line 15 of file hstore_gist.c.

#define SIGPTR ( x ) ( (BITVECP) ARR_DATA_PTR(x) )

Definition at line 22 of file hstore_gist.c.

#define SUMBIT ( val )

Value:

(       \
    GETBITBYTE((val),0) + \
    GETBITBYTE((val),1) + \
    GETBITBYTE((val),2) + \
    GETBITBYTE((val),3) + \
    GETBITBYTE((val),4) + \
    GETBITBYTE((val),5) + \
    GETBITBYTE((val),6) + \
    GETBITBYTE((val),7)   \
)

Definition at line 56 of file hstore_gist.c.

Referenced by sizebitvec().

#define WISH_F	(	a,
		b,
		c
	)		(double)( -(double)(((a)-(b))((a)-(b))((a)-(b)))*(c) )

Definition at line 69 of file hstore_gist.c.

Referenced by g_int_picksplit(), g_intbig_picksplit(), and ghstore_picksplit().

Typedef Documentation

typedef char BITVEC[SIGLEN]

Definition at line 19 of file hstore_gist.c.

typedef char* BITVECP

Definition at line 20 of file hstore_gist.c.

Function Documentation

static int comparecost	(	const void *	a,
		const void *	b
	)			`[static]`

Definition at line 323 of file hstore_gist.c.

Referenced by ghstore_picksplit().

{
    return ((const SPLITCOST *) a)->cost - ((const SPLITCOST *) b)->cost;
}

Datum ghstore_compress ( PG_FUNCTION_ARGS )

Definition at line 109 of file hstore_gist.c.

References ALLISTRUE, ARRPTR, CALCGTSIZE, crc32_sz(), DatumGetHStoreP, DatumGetPointer, FALSE, GISTTYPE::flag, GETSIGN, gistentryinit, HASH, HS_COUNT, HS_KEY, HS_KEYLEN, HS_VAL, HS_VALISNULL, HS_VALLEN, i, ISALLTRUE, GISTENTRY::key, GISTENTRY::leafkey, LOOPBYTE, GISTENTRY::offset, GISTENTRY::page, palloc(), palloc0(), PG_GETARG_POINTER, PG_RETURN_POINTER, PointerGetDatum, GISTENTRY::rel, SET_VARSIZE, sign, STRPTR, and val.

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

    if (entry->leafkey)
    {
        GISTTYPE   *res = (GISTTYPE *) palloc0(CALCGTSIZE(0));
        HStore     *val = DatumGetHStoreP(entry->key);
        HEntry     *hsent = ARRPTR(val);
        char       *ptr = STRPTR(val);
        int         count = HS_COUNT(val);
        int         i;

        SET_VARSIZE(res, CALCGTSIZE(0));

        for (i = 0; i < count; ++i)
        {
            int         h;

            h = crc32_sz((char *) HS_KEY(hsent, ptr, i), HS_KEYLEN(hsent, i));
            HASH(GETSIGN(res), h);
            if (!HS_VALISNULL(hsent, i))
            {
                h = crc32_sz((char *) HS_VAL(hsent, ptr, i), HS_VALLEN(hsent, i));
                HASH(GETSIGN(res), h);
            }
        }

        retval = (GISTENTRY *) palloc(sizeof(GISTENTRY));
        gistentryinit(*retval, PointerGetDatum(res),
                      entry->rel, entry->page,
                      entry->offset,
                      FALSE);
    }
    else if (!ISALLTRUE(DatumGetPointer(entry->key)))
    {
        int32       i;
        GISTTYPE   *res;
        BITVECP     sign = GETSIGN(DatumGetPointer(entry->key));

        LOOPBYTE
        {
            if ((sign[i] & 0xff) != 0xff)
                PG_RETURN_POINTER(retval);
        }

        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);
}

Datum ghstore_consistent ( PG_FUNCTION_ARGS )

Definition at line 495 of file hstore_gist.c.

References ARRPTR, crc32_sz(), DatumGetPointer, deconstruct_array(), elog, ERROR, GETBIT, GETSIGN, HASHVAL, HS_COUNT, HS_KEY, HS_KEYLEN, HS_VAL, HS_VALISNULL, HS_VALLEN, HStoreContainsStrategyNumber, HStoreExistsAllStrategyNumber, HStoreExistsAnyStrategyNumber, HStoreExistsStrategyNumber, HStoreOldContainsStrategyNumber, i, ISALLTRUE, PG_GETARG_ARRAYTYPE_P, PG_GETARG_HS, PG_GETARG_POINTER, PG_GETARG_TEXT_PP, PG_GETARG_UINT16, PG_RETURN_BOOL, sign, STRPTR, TEXTOID, VARDATA, VARDATA_ANY, VARHDRSZ, VARSIZE, and VARSIZE_ANY_EXHDR.

{
    GISTTYPE   *entry = (GISTTYPE *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
    StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);

    /* Oid      subtype = PG_GETARG_OID(3); */
    bool       *recheck = (bool *) PG_GETARG_POINTER(4);
    bool        res = true;
    BITVECP     sign;

    /* All cases served by this function are inexact */
    *recheck = true;

    if (ISALLTRUE(entry))
        PG_RETURN_BOOL(true);

    sign = GETSIGN(entry);

    if (strategy == HStoreContainsStrategyNumber ||
        strategy == HStoreOldContainsStrategyNumber)
    {
        HStore     *query = PG_GETARG_HS(1);
        HEntry     *qe = ARRPTR(query);
        char       *qv = STRPTR(query);
        int         count = HS_COUNT(query);
        int         i;

        for (i = 0; res && i < count; ++i)
        {
            int         crc = crc32_sz((char *) HS_KEY(qe, qv, i), HS_KEYLEN(qe, i));

            if (GETBIT(sign, HASHVAL(crc)))
            {
                if (!HS_VALISNULL(qe, i))
                {
                    crc = crc32_sz((char *) HS_VAL(qe, qv, i), HS_VALLEN(qe, i));
                    if (!GETBIT(sign, HASHVAL(crc)))
                        res = false;
                }
            }
            else
                res = false;
        }
    }
    else if (strategy == HStoreExistsStrategyNumber)
    {
        text       *query = PG_GETARG_TEXT_PP(1);
        int         crc = crc32_sz(VARDATA_ANY(query), VARSIZE_ANY_EXHDR(query));

        res = (GETBIT(sign, HASHVAL(crc))) ? true : false;
    }
    else if (strategy == HStoreExistsAllStrategyNumber)
    {
        ArrayType  *query = PG_GETARG_ARRAYTYPE_P(1);
        Datum      *key_datums;
        bool       *key_nulls;
        int         key_count;
        int         i;

        deconstruct_array(query,
                          TEXTOID, -1, false, 'i',
                          &key_datums, &key_nulls, &key_count);

        for (i = 0; res && i < key_count; ++i)
        {
            int         crc;

            if (key_nulls[i])
                continue;
            crc = crc32_sz(VARDATA(key_datums[i]), VARSIZE(key_datums[i]) - VARHDRSZ);
            if (!(GETBIT(sign, HASHVAL(crc))))
                res = FALSE;
        }
    }
    else if (strategy == HStoreExistsAnyStrategyNumber)
    {
        ArrayType  *query = PG_GETARG_ARRAYTYPE_P(1);
        Datum      *key_datums;
        bool       *key_nulls;
        int         key_count;
        int         i;

        deconstruct_array(query,
                          TEXTOID, -1, false, 'i',
                          &key_datums, &key_nulls, &key_count);

        res = FALSE;

        for (i = 0; !res && i < key_count; ++i)
        {
            int         crc;

            if (key_nulls[i])
                continue;
            crc = crc32_sz(VARDATA(key_datums[i]), VARSIZE(key_datums[i]) - VARHDRSZ);
            if (GETBIT(sign, HASHVAL(crc)))
                res = TRUE;
        }
    }
    else
        elog(ERROR, "Unsupported strategy number: %d", strategy);

    PG_RETURN_BOOL(res);
}

Datum ghstore_decompress ( PG_FUNCTION_ARGS )

Definition at line 175 of file hstore_gist.c.

References PG_GETARG_POINTER, and PG_RETURN_POINTER.

{
    PG_RETURN_POINTER(PG_GETARG_POINTER(0));
}

Datum ghstore_in ( PG_FUNCTION_ARGS )

Definition at line 79 of file hstore_gist.c.

References elog, ERROR, and PG_RETURN_DATUM.

{
    elog(ERROR, "Not implemented");
    PG_RETURN_DATUM(0);
}

Datum ghstore_out ( PG_FUNCTION_ARGS )

Definition at line 86 of file hstore_gist.c.

References elog, ERROR, and PG_RETURN_DATUM.

{
    elog(ERROR, "Not implemented");
    PG_RETURN_DATUM(0);
}

Datum ghstore_penalty ( PG_FUNCTION_ARGS )

Definition at line 303 of file hstore_gist.c.

References DatumGetPointer, hemdist(), GISTENTRY::key, PG_GETARG_POINTER, and PG_RETURN_POINTER.

{
    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);
}

Datum ghstore_picksplit ( PG_FUNCTION_ARGS )

Definition at line 330 of file hstore_gist.c.

References comparecost(), SPLITCOST::cost, FirstOffsetNumber, GISTTYPE::flag, GETENTRY, GETSIGN, GTHDRSIZE, hemdist(), i, ISALLTRUE, LOOPBYTE, MemSet, GistEntryVector::n, OffsetNumberNext, palloc(), PG_GETARG_POINTER, PG_RETURN_POINTER, PointerGetDatum, SPLITCOST::pos, qsort, SET_VARSIZE, SIGLEN, GIST_SPLITVEC::spl_ldatum, GIST_SPLITVEC::spl_left, GIST_SPLITVEC::spl_nleft, GIST_SPLITVEC::spl_nright, GIST_SPLITVEC::spl_rdatum, GIST_SPLITVEC::spl_right, and WISH_F.

{
    GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
    OffsetNumber maxoff = entryvec->n - 2;

    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;
    BITVECP     ptr;
    int         i;
    SPLITCOST  *costvector;
    GISTTYPE   *_k,
               *_j;

    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, 0.0001))
        {
            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;

    v->spl_ldatum = PointerGetDatum(datum_l);
    v->spl_rdatum = PointerGetDatum(datum_r);

    PG_RETURN_POINTER(v);
}

Datum ghstore_same ( PG_FUNCTION_ARGS )

Definition at line 181 of file hstore_gist.c.

References GETSIGN, i, ISALLTRUE, LOOPBYTE, PG_GETARG_POINTER, and PG_RETURN_POINTER.

{
    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 ghstore_union ( PG_FUNCTION_ARGS )

Definition at line 270 of file hstore_gist.c.

References CALCGTSIZE, GISTTYPE::flag, flag(), GETENTRY, GETSIGN, i, ISALLTRUE, MemSet, GistEntryVector::n, palloc(), PG_GETARG_POINTER, PG_RETURN_POINTER, SET_VARSIZE, and unionkey().

{
    GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
    int32       len = entryvec->n;

    int        *size = (int *) PG_GETARG_POINTER(1);
    BITVEC      base;
    int32       i;
    int32       flag = 0;
    GISTTYPE   *result;

    MemSet((void *) base, 0, sizeof(BITVEC));
    for (i = 0; i < len; 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);
}

static int hemdist	(	GISTTYPE *	a,
		GISTTYPE *	b
	)			`[static]`

Definition at line 241 of file hstore_gist.c.

References GETSIGN, hemdistsign(), ISALLTRUE, SIGLENBIT, and sizebitvec().

Referenced by ghstore_penalty(), and ghstore_picksplit().

{
    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));
}

static int hemdistsign	(	BITVECP	a,
		BITVECP	b
	)			`[static]`

Definition at line 227 of file hstore_gist.c.

References GETBIT, i, and LOOPBIT.

Referenced by hemdist().

{
    int         i,
                dist = 0;

    LOOPBIT
    {
        if (GETBIT(a, i) != GETBIT(b, i))
            dist++;
    }
    return dist;
}

PG_FUNCTION_INFO_V1 ( ghstore_out )

PG_FUNCTION_INFO_V1 ( ghstore_same )

PG_FUNCTION_INFO_V1 ( ghstore_penalty )

PG_FUNCTION_INFO_V1 ( ghstore_in )

PG_FUNCTION_INFO_V1 ( ghstore_picksplit )

PG_FUNCTION_INFO_V1 ( ghstore_union )

PG_FUNCTION_INFO_V1 ( ghstore_compress )

PG_FUNCTION_INFO_V1 ( ghstore_decompress )

PG_FUNCTION_INFO_V1 ( ghstore_consistent )

static int32 sizebitvec ( BITVECP sign ) [static]

Definition at line 213 of file hstore_gist.c.

References i, LOOPBYTE, and SUMBIT.

Referenced by hemdist().

{
    int32       size = 0,
                i;

    LOOPBYTE
    {
        size += SUMBIT(sign);
        sign = (BITVECP) (((char *) sign) + 1);
    }
    return size;
}

static int32 unionkey	(	BITVECP	sbase,
		GISTTYPE *	add
	)			`[static]`

Definition at line 257 of file hstore_gist.c.

References GETSIGN, i, ISALLTRUE, and LOOPBYTE.

Referenced by ghstore_union().

{
    int32       i;
    BITVECP     sadd = GETSIGN(add);

    if (ISALLTRUE(add))
        return 1;
    LOOPBYTE
        sbase[i] |= sadd[i];
    return 0;
}

Header And Logo

hstore_gist.c File Reference

Data Structures

Defines

Typedefs

Functions

Define Documentation

Typedef Documentation

Function Documentation