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This will allow enums to be used in exclusion constraints. The code uses the new CallerFInfoFunctionCall infrastructure in fmgr, and the support for it added to btree_gist in commit 393bb504d7. Reviewed by Tom Lane and Anastasia Lubennikova Discussion: http://postgr.es/m/56EA8A71.8060107@dunslane.net
188 lines
4.6 KiB
C
188 lines
4.6 KiB
C
/*
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* contrib/btree_gist/btree_enum.c
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*/
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#include "postgres.h"
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#include "fmgr.h"
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#include "utils/builtins.h"
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#include "btree_gist.h"
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#include "btree_utils_num.h"
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/* enums are really Oids, so we just use the same structure */
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typedef struct
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{
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Oid lower;
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Oid upper;
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} oidKEY;
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/*
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** enum ops
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*/
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PG_FUNCTION_INFO_V1(gbt_enum_compress);
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PG_FUNCTION_INFO_V1(gbt_enum_fetch);
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PG_FUNCTION_INFO_V1(gbt_enum_union);
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PG_FUNCTION_INFO_V1(gbt_enum_picksplit);
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PG_FUNCTION_INFO_V1(gbt_enum_consistent);
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PG_FUNCTION_INFO_V1(gbt_enum_penalty);
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PG_FUNCTION_INFO_V1(gbt_enum_same);
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static bool
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gbt_enumgt(const void *a, const void *b, FmgrInfo *flinfo)
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{
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return DatumGetBool(
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CallerFInfoFunctionCall2(enum_gt, flinfo, InvalidOid, ObjectIdGetDatum(*((const Oid *) a)), ObjectIdGetDatum(*((const Oid *) b)))
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);
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}
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static bool
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gbt_enumge(const void *a, const void *b, FmgrInfo *flinfo)
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{
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return DatumGetBool(
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CallerFInfoFunctionCall2(enum_ge, flinfo, InvalidOid, ObjectIdGetDatum(*((const Oid *) a)), ObjectIdGetDatum(*((const Oid *) b)))
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);
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}
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static bool
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gbt_enumeq(const void *a, const void *b, FmgrInfo *flinfo)
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{
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return (*((const Oid *) a) == *((const Oid *) b));
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}
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static bool
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gbt_enumle(const void *a, const void *b, FmgrInfo *flinfo)
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{
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return DatumGetBool(
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CallerFInfoFunctionCall2(enum_le, flinfo, InvalidOid, ObjectIdGetDatum(*((const Oid *) a)), ObjectIdGetDatum(*((const Oid *) b)))
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);
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}
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static bool
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gbt_enumlt(const void *a, const void *b, FmgrInfo *flinfo)
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{
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return DatumGetBool(
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CallerFInfoFunctionCall2(enum_lt, flinfo, InvalidOid, ObjectIdGetDatum(*((const Oid *) a)), ObjectIdGetDatum(*((const Oid *) b)))
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);
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}
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static int
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gbt_enumkey_cmp(const void *a, const void *b, FmgrInfo *flinfo)
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{
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oidKEY *ia = (oidKEY *) (((const Nsrt *) a)->t);
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oidKEY *ib = (oidKEY *) (((const Nsrt *) b)->t);
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if (ia->lower == ib->lower)
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{
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if (ia->upper == ib->upper)
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return 0;
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return DatumGetInt32(
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CallerFInfoFunctionCall2(enum_cmp, flinfo, InvalidOid, ObjectIdGetDatum(ia->upper), ObjectIdGetDatum(ib->upper))
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);
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}
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return DatumGetInt32(
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CallerFInfoFunctionCall2(enum_cmp, flinfo, InvalidOid, ObjectIdGetDatum(ia->lower), ObjectIdGetDatum(ib->lower))
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);
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}
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static const gbtree_ninfo tinfo =
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{
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gbt_t_enum,
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sizeof(Oid),
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8, /* sizeof(gbtreekey8) */
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gbt_enumgt,
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gbt_enumge,
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gbt_enumeq,
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gbt_enumle,
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gbt_enumlt,
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gbt_enumkey_cmp,
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NULL /* no KNN support at least for now */
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};
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/**************************************************
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* Enum ops
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**************************************************/
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Datum
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gbt_enum_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_enum_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_enum_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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Oid query = PG_GETARG_OID(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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oidKEY *kkk = (oidKEY *) 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(
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gbt_num_consistent(&key, (void *) &query, &strategy, GIST_LEAF(entry), &tinfo, fcinfo->flinfo)
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);
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}
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Datum
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gbt_enum_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 = palloc(sizeof(oidKEY));
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*(int *) PG_GETARG_POINTER(1) = sizeof(oidKEY);
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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_enum_penalty(PG_FUNCTION_ARGS)
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{
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oidKEY *origentry = (oidKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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oidKEY *newentry = (oidKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
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float *result = (float *) PG_GETARG_POINTER(2);
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penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
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PG_RETURN_POINTER(result);
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}
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Datum
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gbt_enum_picksplit(PG_FUNCTION_ARGS)
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{
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PG_RETURN_POINTER(gbt_num_picksplit(
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(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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}
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Datum
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gbt_enum_same(PG_FUNCTION_ARGS)
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{
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oidKEY *b1 = (oidKEY *) PG_GETARG_POINTER(0);
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oidKEY *b2 = (oidKEY *) 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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