81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
/*
|
|
* contrib/btree_gist/btree_gist.c
|
|
*/
|
|
#include "postgres.h"
|
|
|
|
#include "access/stratnum.h"
|
|
#include "utils/builtins.h"
|
|
|
|
PG_MODULE_MAGIC;
|
|
|
|
PG_FUNCTION_INFO_V1(gbt_decompress);
|
|
PG_FUNCTION_INFO_V1(gbtreekey_in);
|
|
PG_FUNCTION_INFO_V1(gbtreekey_out);
|
|
PG_FUNCTION_INFO_V1(gist_stratnum_btree);
|
|
|
|
/**************************************************
|
|
* In/Out for keys
|
|
**************************************************/
|
|
|
|
|
|
Datum
|
|
gbtreekey_in(PG_FUNCTION_ARGS)
|
|
{
|
|
Oid typioparam = PG_GETARG_OID(1);
|
|
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("cannot accept a value of type %s",
|
|
format_type_extended(typioparam, -1,
|
|
FORMAT_TYPE_ALLOW_INVALID))));
|
|
|
|
PG_RETURN_VOID(); /* keep compiler quiet */
|
|
}
|
|
|
|
Datum
|
|
gbtreekey_out(PG_FUNCTION_ARGS)
|
|
{
|
|
/* Sadly, we do not receive any indication of the specific type */
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("cannot display a value of type %s", "gbtreekey?")));
|
|
|
|
PG_RETURN_VOID(); /* keep compiler quiet */
|
|
}
|
|
|
|
|
|
/*
|
|
** GiST DeCompress methods
|
|
** do not do anything.
|
|
*/
|
|
Datum
|
|
gbt_decompress(PG_FUNCTION_ARGS)
|
|
{
|
|
PG_RETURN_POINTER(PG_GETARG_POINTER(0));
|
|
}
|
|
|
|
/*
|
|
* Returns the btree number for equals, otherwise invalid.
|
|
*/
|
|
Datum
|
|
gist_stratnum_btree(PG_FUNCTION_ARGS)
|
|
{
|
|
StrategyNumber strat = PG_GETARG_UINT16(0);
|
|
|
|
switch (strat)
|
|
{
|
|
case RTEqualStrategyNumber:
|
|
PG_RETURN_UINT16(BTEqualStrategyNumber);
|
|
case RTLessStrategyNumber:
|
|
PG_RETURN_UINT16(BTLessStrategyNumber);
|
|
case RTLessEqualStrategyNumber:
|
|
PG_RETURN_UINT16(BTLessEqualStrategyNumber);
|
|
case RTGreaterStrategyNumber:
|
|
PG_RETURN_UINT16(BTGreaterStrategyNumber);
|
|
case RTGreaterEqualStrategyNumber:
|
|
PG_RETURN_UINT16(BTGreaterEqualStrategyNumber);
|
|
default:
|
|
PG_RETURN_UINT16(InvalidStrategy);
|
|
}
|
|
}
|