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https://git.postgresql.org/git/postgresql.git
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Commit 16fa9b2b30
introduced a faster way to build GiST indexes, by
sorting all the data. This commit adds the sortsupport functions needed
to make use of that feature for btree_gist.
Author: Andrey Borodin
Discussion: https://www.postgresql.org/message-id/2F3F7265-0D22-44DB-AD71-8554C743D943@yandex-team.ru
276 lines
6.3 KiB
C
276 lines
6.3 KiB
C
/*
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* contrib/btree_gist/btree_macaddr8.c
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*/
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#include "postgres.h"
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#include "btree_gist.h"
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#include "btree_utils_num.h"
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#include "utils/builtins.h"
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#include "utils/inet.h"
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typedef struct
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{
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macaddr8 lower;
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macaddr8 upper;
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/* make struct size = sizeof(gbtreekey16) */
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} mac8KEY;
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/*
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** OID ops
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*/
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PG_FUNCTION_INFO_V1(gbt_macad8_compress);
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PG_FUNCTION_INFO_V1(gbt_macad8_fetch);
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PG_FUNCTION_INFO_V1(gbt_macad8_union);
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PG_FUNCTION_INFO_V1(gbt_macad8_picksplit);
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PG_FUNCTION_INFO_V1(gbt_macad8_consistent);
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PG_FUNCTION_INFO_V1(gbt_macad8_penalty);
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PG_FUNCTION_INFO_V1(gbt_macad8_same);
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PG_FUNCTION_INFO_V1(gbt_macad8_sortsupport);
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static bool
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gbt_macad8gt(const void *a, const void *b, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2(macaddr8_gt, PointerGetDatum(a), PointerGetDatum(b)));
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}
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static bool
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gbt_macad8ge(const void *a, const void *b, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2(macaddr8_ge, PointerGetDatum(a), PointerGetDatum(b)));
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}
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static bool
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gbt_macad8eq(const void *a, const void *b, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2(macaddr8_eq, PointerGetDatum(a), PointerGetDatum(b)));
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}
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static bool
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gbt_macad8le(const void *a, const void *b, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2(macaddr8_le, PointerGetDatum(a), PointerGetDatum(b)));
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}
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static bool
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gbt_macad8lt(const void *a, const void *b, FmgrInfo *flinfo)
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{
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return DatumGetBool(DirectFunctionCall2(macaddr8_lt, PointerGetDatum(a), PointerGetDatum(b)));
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}
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static int
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gbt_macad8key_cmp(const void *a, const void *b, FmgrInfo *flinfo)
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{
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mac8KEY *ia = (mac8KEY *) (((const Nsrt *) a)->t);
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mac8KEY *ib = (mac8KEY *) (((const Nsrt *) b)->t);
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int res;
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res = DatumGetInt32(DirectFunctionCall2(macaddr8_cmp, Macaddr8PGetDatum(&ia->lower), Macaddr8PGetDatum(&ib->lower)));
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if (res == 0)
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return DatumGetInt32(DirectFunctionCall2(macaddr8_cmp, Macaddr8PGetDatum(&ia->upper), Macaddr8PGetDatum(&ib->upper)));
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return res;
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}
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static const gbtree_ninfo tinfo =
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{
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gbt_t_macad8,
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sizeof(macaddr8),
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16, /* sizeof(gbtreekey16) */
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gbt_macad8gt,
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gbt_macad8ge,
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gbt_macad8eq,
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gbt_macad8le,
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gbt_macad8lt,
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gbt_macad8key_cmp,
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NULL
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};
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/**************************************************
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* macaddr ops
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**************************************************/
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static uint64
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mac8_2_uint64(macaddr8 *m)
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{
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unsigned char *mi = (unsigned char *) m;
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uint64 res = 0;
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int i;
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for (i = 0; i < 8; i++)
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res += (((uint64) mi[i]) << ((uint64) ((7 - i) * 8)));
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return res;
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}
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Datum
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gbt_macad8_compress(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
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}
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Datum
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gbt_macad8_fetch(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
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}
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Datum
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gbt_macad8_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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macaddr8 *query = (macaddr8 *) PG_GETARG_POINTER(1);
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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/* Oid subtype = PG_GETARG_OID(3); */
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bool *recheck = (bool *) PG_GETARG_POINTER(4);
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mac8KEY *kkk = (mac8KEY *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key;
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/* All cases served by this function are exact */
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*recheck = false;
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key.lower = (GBT_NUMKEY *) &kkk->lower;
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key.upper = (GBT_NUMKEY *) &kkk->upper;
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PG_RETURN_BOOL(gbt_num_consistent(&key, (void *) query, &strategy,
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GIST_LEAF(entry), &tinfo, fcinfo->flinfo));
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}
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Datum
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gbt_macad8_union(PG_FUNCTION_ARGS)
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{
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GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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void *out = palloc0(sizeof(mac8KEY));
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*(int *) PG_GETARG_POINTER(1) = sizeof(mac8KEY);
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PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo));
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}
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Datum
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gbt_macad8_penalty(PG_FUNCTION_ARGS)
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{
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mac8KEY *origentry = (mac8KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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mac8KEY *newentry = (mac8KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
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float *result = (float *) PG_GETARG_POINTER(2);
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uint64 iorg[2],
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inew[2];
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iorg[0] = mac8_2_uint64(&origentry->lower);
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iorg[1] = mac8_2_uint64(&origentry->upper);
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inew[0] = mac8_2_uint64(&newentry->lower);
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inew[1] = mac8_2_uint64(&newentry->upper);
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penalty_num(result, iorg[0], iorg[1], inew[0], inew[1]);
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PG_RETURN_POINTER(result);
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}
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Datum
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gbt_macad8_picksplit(PG_FUNCTION_ARGS)
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{
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PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
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(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
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&tinfo, fcinfo->flinfo));
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}
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Datum
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gbt_macad8_same(PG_FUNCTION_ARGS)
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{
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mac8KEY *b1 = (mac8KEY *) PG_GETARG_POINTER(0);
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mac8KEY *b2 = (mac8KEY *) PG_GETARG_POINTER(1);
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bool *result = (bool *) PG_GETARG_POINTER(2);
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*result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
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PG_RETURN_POINTER(result);
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}
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static int
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gbt_macad8_sort_build_cmp(Datum a, Datum b, SortSupport ssup)
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{
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mac8KEY *ma = (mac8KEY *) DatumGetPointer(a);
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mac8KEY *mb = (mac8KEY *) DatumGetPointer(b);
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uint64 ia = mac8_2_uint64(&ma->lower);
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uint64 ib = mac8_2_uint64(&mb->lower);
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/* for leaf items we expect lower == upper */
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if (ia == ib)
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return 0;
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return (ia > ib) ? 1 : -1;
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}
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static Datum
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gbt_macad8_abbrev_convert(Datum original, SortSupport ssup)
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{
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mac8KEY *b1 = (mac8KEY *) DatumGetPointer(original);
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uint64 z = mac8_2_uint64(&b1->lower);
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#if SIZEOF_DATUM == 8
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return UInt64GetDatum(z);
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#else
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/* use the high bits only */
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return UInt32GetDatum(z >> 32);
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#endif
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}
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static int
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gbt_macad8_cmp_abbrev(Datum z1, Datum z2, SortSupport ssup)
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{
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#if SIZEOF_DATUM == 8
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uint64 a = DatumGetUInt64(z1);
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uint64 b = DatumGetUInt64(z2);
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#else
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uint32 a = DatumGetUInt32(z1);
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uint32 b = DatumGetUInt32(z2);
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#endif
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if (a > b)
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return 1;
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else if (a < b)
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return -1;
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else
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return 0;
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}
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static bool
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gbt_macad8_abbrev_abort(int memtupcount, SortSupport ssup)
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{
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return false;
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}
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/*
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* Sort support routine for fast GiST index build by sorting.
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*/
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Datum
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gbt_macad8_sortsupport(PG_FUNCTION_ARGS)
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{
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SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
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if (ssup->abbreviate)
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{
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ssup->comparator = gbt_macad8_cmp_abbrev;
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ssup->abbrev_converter = gbt_macad8_abbrev_convert;
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ssup->abbrev_abort = gbt_macad8_abbrev_abort;
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ssup->abbrev_full_comparator = gbt_macad8_sort_build_cmp;
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}
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else
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{
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ssup->comparator = gbt_macad8_sort_build_cmp;
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}
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PG_RETURN_VOID();
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}
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