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- Add aligment for interval data types - Avoid floating point overflow in penalty functions Janko Richter <jankorichter@yahoo.de> and teodor
252 lines
6.7 KiB
C
252 lines
6.7 KiB
C
#include "btree_gist.h"
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#include "btree_utils_num.h"
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#include "utils/date.h"
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typedef struct
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{
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TimeADT lower;
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TimeADT upper;
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} timeKEY;
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/*
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** time ops
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*/
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PG_FUNCTION_INFO_V1(gbt_time_compress);
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PG_FUNCTION_INFO_V1(gbt_timetz_compress);
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PG_FUNCTION_INFO_V1(gbt_time_union);
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PG_FUNCTION_INFO_V1(gbt_time_picksplit);
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PG_FUNCTION_INFO_V1(gbt_time_consistent);
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PG_FUNCTION_INFO_V1(gbt_timetz_consistent);
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PG_FUNCTION_INFO_V1(gbt_time_penalty);
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PG_FUNCTION_INFO_V1(gbt_time_same);
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Datum gbt_time_compress(PG_FUNCTION_ARGS);
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Datum gbt_timetz_compress(PG_FUNCTION_ARGS);
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Datum gbt_time_union(PG_FUNCTION_ARGS);
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Datum gbt_time_picksplit(PG_FUNCTION_ARGS);
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Datum gbt_time_consistent(PG_FUNCTION_ARGS);
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Datum gbt_timetz_consistent(PG_FUNCTION_ARGS);
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Datum gbt_time_penalty(PG_FUNCTION_ARGS);
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Datum gbt_time_same(PG_FUNCTION_ARGS);
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static bool gbt_timegt (const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(time_gt,TimeADTGetDatum( *((TimeADT*)a) ), TimeADTGetDatum( *((TimeADT*)b) ) )
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);
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}
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static bool gbt_timege (const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(time_ge,TimeADTGetDatum( *((TimeADT*)a) ), TimeADTGetDatum( *((TimeADT*)b) ) )
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);
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}
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static bool gbt_timeeq (const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(time_eq,TimeADTGetDatum( *((TimeADT*)a) ), TimeADTGetDatum( *((TimeADT*)b) ) )
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);
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}
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static bool gbt_timele (const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(time_le,TimeADTGetDatum( *((TimeADT*)a) ), TimeADTGetDatum( *((TimeADT*)b) ) )
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);
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}
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static bool gbt_timelt (const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(time_lt,TimeADTGetDatum( *((TimeADT*)a) ), TimeADTGetDatum( *((TimeADT*)b) ) )
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);
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}
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static int
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gbt_timekey_cmp(const void *a, const void *b)
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{
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if ( gbt_timegt( (void*)&(((Nsrt *) a)->t[0]) , (void*)&(((Nsrt *) b)->t[0]) ) ){
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return 1;
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} else
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if ( gbt_timelt( (void*)&(((Nsrt *) a)->t[0]) , (void*)&(((Nsrt *) b)->t[0]) ) ){
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return -1;
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}
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return 0;
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}
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static const gbtree_ninfo tinfo =
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{
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gbt_t_time,
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sizeof(TimeADT),
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gbt_timegt,
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gbt_timege,
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gbt_timeeq,
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gbt_timele,
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gbt_timelt,
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gbt_timekey_cmp
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};
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/**************************************************
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* time ops
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**************************************************/
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Datum
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gbt_time_compress(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *retval = NULL;
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PG_RETURN_POINTER( gbt_num_compress( retval , entry , &tinfo ));
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}
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Datum
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gbt_timetz_compress(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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GISTENTRY *retval;
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if (entry->leafkey)
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{
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timeKEY *r = (timeKEY *) palloc(sizeof(timeKEY));
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TimeTzADT *tz = DatumGetTimeTzADTP(entry->key);
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retval = palloc(sizeof(GISTENTRY));
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/* We are using the time + zone only to compress */
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r->lower = r->upper = ( tz->time + tz->zone ) ;
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gistentryinit(*retval, PointerGetDatum(r),
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entry->rel, entry->page,
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entry->offset, sizeof(timeKEY), FALSE);
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}
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else
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retval = entry;
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PG_RETURN_POINTER(retval);
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}
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Datum
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gbt_time_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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TimeADT query = PG_GETARG_TIMEADT( 1 );
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timeKEY *kkk = (timeKEY*) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key ;
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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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)
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);
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}
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Datum
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gbt_timetz_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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TimeTzADT *query = PG_GETARG_TIMETZADT_P( 1 );
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TimeADT qqq = query->time + query->zone ;
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timeKEY *kkk = (timeKEY*) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key ;
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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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*)&qqq, &strategy,GIST_LEAF(entry),&tinfo)
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);
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}
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Datum
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gbt_time_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(timeKEY));
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*(int *) PG_GETARG_POINTER(1) = sizeof(timeKEY);
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PG_RETURN_POINTER( gbt_num_union ( (void*)out, entryvec, &tinfo ) );
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}
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Datum
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gbt_time_penalty(PG_FUNCTION_ARGS)
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{
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timeKEY *origentry = (timeKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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timeKEY *newentry = (timeKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
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float *result = (float *) PG_GETARG_POINTER(2);
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Interval *intr;
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#ifdef HAVE_INT64_TIMESTAMP
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int64 res;
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#else
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double res;
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#endif
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intr = DatumGetIntervalP(DirectFunctionCall2(
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time_mi_time,
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TimeADTGetDatum(newentry->upper),
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TimeADTGetDatum(origentry->upper)));
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/* see interval_larger */
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res = Max(intr->time + intr->month * (30 * 86400), 0);
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pfree(intr);
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intr = DatumGetIntervalP(DirectFunctionCall2(
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time_mi_time,
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TimeADTGetDatum(origentry->lower),
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TimeADTGetDatum(newentry->lower)));
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/* see interval_larger */
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res += Max(intr->time + intr->month * (30 * 86400), 0);
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pfree(intr);
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*result = 0.0;
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if ( res > 0 ){
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intr = DatumGetIntervalP(DirectFunctionCall2(
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time_mi_time,
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TimeADTGetDatum(origentry->upper),
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TimeADTGetDatum(origentry->lower)));
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*result += FLT_MIN ;
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*result += (float) ( res / ( (double) ( res + intr->time + intr->month * (30 * 86400) ) ) );
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*result *= ( FLT_MAX / ( ( (GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1 ) );
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pfree ( intr );
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}
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PG_RETURN_POINTER(result);
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}
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Datum
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gbt_time_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
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));
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}
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Datum
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gbt_time_same(PG_FUNCTION_ARGS)
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{
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timeKEY *b1 = (timeKEY *) PG_GETARG_POINTER(0);
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timeKEY *b2 = (timeKEY *) 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 );
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PG_RETURN_POINTER(result);
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}
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