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/*
* contrib/btree_gist/btree_bytea.c
*/
#include "postgres.h"
#include "btree_gist.h"
#include "btree_utils_var.h"
#include "utils/fmgrprotos.h"
#include "utils/sortsupport.h"
/* GiST support functions */
PG_FUNCTION_INFO_V1(gbt_bytea_compress);
PG_FUNCTION_INFO_V1(gbt_bytea_union);
PG_FUNCTION_INFO_V1(gbt_bytea_picksplit);
PG_FUNCTION_INFO_V1(gbt_bytea_consistent);
PG_FUNCTION_INFO_V1(gbt_bytea_penalty);
PG_FUNCTION_INFO_V1(gbt_bytea_same);
PG_FUNCTION_INFO_V1(gbt_bytea_sortsupport);
/* define for comparison */
static bool
gbt_byteagt(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(byteagt,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static bool
gbt_byteage(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(byteage,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static bool
gbt_byteaeq(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(byteaeq,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static bool
gbt_byteale(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(byteale,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static bool
gbt_bytealt(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetBool(DirectFunctionCall2(bytealt,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static int32
gbt_byteacmp(const void *a, const void *b, Oid collation, FmgrInfo *flinfo)
{
return DatumGetInt32(DirectFunctionCall2(byteacmp,
PointerGetDatum(a),
PointerGetDatum(b)));
}
static const gbtree_vinfo tinfo =
{
gbt_t_bytea,
0,
true,
gbt_byteagt,
gbt_byteage,
gbt_byteaeq,
gbt_byteale,
gbt_bytealt,
gbt_byteacmp,
NULL
};
/**************************************************
* GiST support functions
**************************************************/
Datum
gbt_bytea_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
PG_RETURN_POINTER(gbt_var_compress(entry, &tinfo));
}
Datum
gbt_bytea_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
void *query = DatumGetByteaP(PG_GETARG_DATUM(1));
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
/* Oid subtype = PG_GETARG_OID(3); */
bool *recheck = (bool *) PG_GETARG_POINTER(4);
bool retval;
GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(entry->key);
GBT_VARKEY_R r = gbt_var_key_readable(key);
/* All cases served by this function are exact */
*recheck = false;
retval = gbt_var_consistent(&r, query, strategy, PG_GET_COLLATION(),
GIST_LEAF(entry), &tinfo, fcinfo->flinfo);
PG_RETURN_BOOL(retval);
}
Datum
gbt_bytea_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
int32 *size = (int *) PG_GETARG_POINTER(1);
PG_RETURN_POINTER(gbt_var_union(entryvec, size, PG_GET_COLLATION(),
&tinfo, fcinfo->flinfo));
}
Datum
gbt_bytea_picksplit(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
GIST_SPLITVEC *v = (GIST_SPLITVEC *) PG_GETARG_POINTER(1);
gbt_var_picksplit(entryvec, v, PG_GET_COLLATION(),
&tinfo, fcinfo->flinfo);
PG_RETURN_POINTER(v);
}
Datum
gbt_bytea_same(PG_FUNCTION_ARGS)
{
Datum d1 = PG_GETARG_DATUM(0);
Datum d2 = PG_GETARG_DATUM(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
*result = gbt_var_same(d1, d2, PG_GET_COLLATION(), &tinfo, fcinfo->flinfo);
PG_RETURN_POINTER(result);
}
Datum
gbt_bytea_penalty(PG_FUNCTION_ARGS)
{
GISTENTRY *o = (GISTENTRY *) PG_GETARG_POINTER(0);
GISTENTRY *n = (GISTENTRY *) PG_GETARG_POINTER(1);
float *result = (float *) PG_GETARG_POINTER(2);
PG_RETURN_POINTER(gbt_var_penalty(result, o, n, PG_GET_COLLATION(),
&tinfo, fcinfo->flinfo));
}
static int
gbt_bytea_ssup_cmp(Datum x, Datum y, SortSupport ssup)
{
GBT_VARKEY *key1 = PG_DETOAST_DATUM(x);
GBT_VARKEY *key2 = PG_DETOAST_DATUM(y);
GBT_VARKEY_R xkey = gbt_var_key_readable(key1);
GBT_VARKEY_R ykey = gbt_var_key_readable(key2);
Datum result;
/* for leaf items we expect lower == upper, so only compare lower */
result = DirectFunctionCall2(byteacmp,
PointerGetDatum(xkey.lower),
PointerGetDatum(ykey.lower));
GBT_FREE_IF_COPY(key1, x);
GBT_FREE_IF_COPY(key2, y);
return DatumGetInt32(result);
}
Datum
gbt_bytea_sortsupport(PG_FUNCTION_ARGS)
{
SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
ssup->comparator = gbt_bytea_ssup_cmp;
ssup->ssup_extra = NULL;
PG_RETURN_VOID();
}
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