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methods in a short-lived memory context, there is no need for GiST methods to do their own manual (and error-prone) memory management.
217 lines
5.0 KiB
C
217 lines
5.0 KiB
C
#include "btree_gist.h"
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#include "btree_utils_var.h"
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#include "utils/builtins.h"
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#include "utils/numeric.h"
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/*
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** Bytea ops
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*/
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PG_FUNCTION_INFO_V1(gbt_numeric_compress);
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PG_FUNCTION_INFO_V1(gbt_numeric_union);
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PG_FUNCTION_INFO_V1(gbt_numeric_picksplit);
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PG_FUNCTION_INFO_V1(gbt_numeric_consistent);
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PG_FUNCTION_INFO_V1(gbt_numeric_penalty);
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PG_FUNCTION_INFO_V1(gbt_numeric_same);
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Datum gbt_numeric_compress(PG_FUNCTION_ARGS);
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Datum gbt_numeric_union(PG_FUNCTION_ARGS);
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Datum gbt_numeric_picksplit(PG_FUNCTION_ARGS);
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Datum gbt_numeric_consistent(PG_FUNCTION_ARGS);
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Datum gbt_numeric_penalty(PG_FUNCTION_ARGS);
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Datum gbt_numeric_same(PG_FUNCTION_ARGS);
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/* define for comparison */
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static bool
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gbt_numeric_gt(const void *a, const void *b)
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{
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return (DatumGetBool(DirectFunctionCall2(numeric_gt, PointerGetDatum(a), PointerGetDatum(b))));
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}
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static bool
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gbt_numeric_ge(const void *a, const void *b)
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{
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return (DatumGetBool(DirectFunctionCall2(numeric_ge, PointerGetDatum(a), PointerGetDatum(b))));
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}
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static bool
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gbt_numeric_eq(const void *a, const void *b)
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{
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return (DatumGetBool(DirectFunctionCall2(numeric_eq, PointerGetDatum(a), PointerGetDatum(b))));
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}
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static bool
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gbt_numeric_le(const void *a, const void *b)
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{
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return (DatumGetBool(DirectFunctionCall2(numeric_le, PointerGetDatum(a), PointerGetDatum(b))));
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}
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static bool
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gbt_numeric_lt(const void *a, const void *b)
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{
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return (DatumGetBool(DirectFunctionCall2(numeric_lt, PointerGetDatum(a), PointerGetDatum(b))));
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}
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static int32
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gbt_numeric_cmp(const bytea *a, const bytea *b)
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{
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return
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(DatumGetInt32(DirectFunctionCall2(numeric_cmp, PointerGetDatum(a), PointerGetDatum(b))));
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}
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static const gbtree_vinfo tinfo =
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{
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gbt_t_numeric,
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FALSE,
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FALSE,
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gbt_numeric_gt,
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gbt_numeric_ge,
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gbt_numeric_eq,
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gbt_numeric_le,
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gbt_numeric_lt,
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gbt_numeric_cmp,
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NULL
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};
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/**************************************************
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* Text ops
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**************************************************/
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Datum
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gbt_numeric_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_var_compress(entry, &tinfo));
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}
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Datum
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gbt_numeric_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(entry->key);
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void *query = (void *) DatumGetNumeric(PG_GETARG_DATUM(1));
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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bool retval;
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GBT_VARKEY_R r = gbt_var_key_readable(key);
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retval = gbt_var_consistent(&r, query, &strategy, GIST_LEAF(entry), &tinfo);
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PG_RETURN_BOOL(retval);
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}
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Datum
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gbt_numeric_union(PG_FUNCTION_ARGS)
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{
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GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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int32 *size = (int *) PG_GETARG_POINTER(1);
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PG_RETURN_POINTER(gbt_var_union(entryvec, size, &tinfo));
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}
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Datum
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gbt_numeric_same(PG_FUNCTION_ARGS)
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{
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Datum d1 = PG_GETARG_DATUM(0);
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Datum d2 = PG_GETARG_DATUM(1);
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bool *result = (bool *) PG_GETARG_POINTER(2);
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PG_RETURN_POINTER(gbt_var_same(result, d1, d2, &tinfo));
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}
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Datum
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gbt_numeric_penalty(PG_FUNCTION_ARGS)
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{
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GISTENTRY *o = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *n = (GISTENTRY *) PG_GETARG_POINTER(1);
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float *result = (float *) PG_GETARG_POINTER(2);
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Numeric us,
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os,
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ds;
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GBT_VARKEY *org = (GBT_VARKEY *) DatumGetPointer(o->key);
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GBT_VARKEY *newe = (GBT_VARKEY *) DatumGetPointer(n->key);
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Datum uni;
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GBT_VARKEY_R rk,
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ok,
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uk;
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rk = gbt_var_key_readable(org);
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uni = PointerGetDatum(gbt_var_key_copy(&rk, TRUE));
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gbt_var_bin_union(&uni, newe, &tinfo);
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ok = gbt_var_key_readable(org);
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uk = gbt_var_key_readable((GBT_VARKEY *) DatumGetPointer(uni));
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us = DatumGetNumeric(DirectFunctionCall2(
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numeric_sub,
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PointerGetDatum(uk.upper),
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PointerGetDatum(uk.lower)
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));
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os = DatumGetNumeric(DirectFunctionCall2(
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numeric_sub,
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PointerGetDatum(ok.upper),
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PointerGetDatum(ok.lower)
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));
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ds = DatumGetNumeric(DirectFunctionCall2(
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numeric_sub,
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NumericGetDatum(us),
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NumericGetDatum(os)
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));
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if (NUMERIC_IS_NAN(us))
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{
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if (NUMERIC_IS_NAN(os))
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*result = 0.0;
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else
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*result = 1.0;
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}
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else
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{
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Numeric nul = DatumGetNumeric(DirectFunctionCall1(int4_numeric, Int32GetDatum(0)));
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*result = 0.0;
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if (DirectFunctionCall2(numeric_gt, NumericGetDatum(ds), NumericGetDatum(nul)))
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{
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*result += FLT_MIN;
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os = DatumGetNumeric(DirectFunctionCall2(
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numeric_div,
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NumericGetDatum(ds),
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NumericGetDatum(us)
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));
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*result += (float4) DatumGetFloat8(DirectFunctionCall1(numeric_float8_no_overflow, NumericGetDatum(os)));
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}
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}
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if (*result > 0)
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*result *= (FLT_MAX / (((GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1));
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PG_RETURN_POINTER(result);
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}
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Datum
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gbt_numeric_picksplit(PG_FUNCTION_ARGS)
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{
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GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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GIST_SPLITVEC *v = (GIST_SPLITVEC *) PG_GETARG_POINTER(1);
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gbt_var_picksplit(entryvec, v, &tinfo);
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PG_RETURN_POINTER(v);
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}
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