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- Add aligment for interval data types - Avoid floating point overflow in penalty functions Janko Richter <jankorichter@yahoo.de> and teodor
284 lines
6.9 KiB
C
284 lines
6.9 KiB
C
#include "btree_gist.h"
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#include "btree_utils_num.h"
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typedef struct
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{
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Timestamp lower;
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Timestamp upper;
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} tsKEY;
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/*
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** timestamp ops
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*/
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PG_FUNCTION_INFO_V1(gbt_ts_compress);
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PG_FUNCTION_INFO_V1(gbt_tstz_compress);
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PG_FUNCTION_INFO_V1(gbt_ts_union);
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PG_FUNCTION_INFO_V1(gbt_ts_picksplit);
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PG_FUNCTION_INFO_V1(gbt_ts_consistent);
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PG_FUNCTION_INFO_V1(gbt_tstz_consistent);
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PG_FUNCTION_INFO_V1(gbt_ts_penalty);
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PG_FUNCTION_INFO_V1(gbt_ts_same);
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Datum gbt_ts_compress(PG_FUNCTION_ARGS);
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Datum gbt_tstz_compress(PG_FUNCTION_ARGS);
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Datum gbt_ts_union(PG_FUNCTION_ARGS);
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Datum gbt_ts_picksplit(PG_FUNCTION_ARGS);
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Datum gbt_ts_consistent(PG_FUNCTION_ARGS);
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Datum gbt_tstz_consistent(PG_FUNCTION_ARGS);
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Datum gbt_ts_penalty(PG_FUNCTION_ARGS);
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Datum gbt_ts_same(PG_FUNCTION_ARGS);
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static bool gbt_tsgt (const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(timestamp_gt,PointerGetDatum( a ), PointerGetDatum( b ) )
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);
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}
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static bool gbt_tsge (const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(timestamp_ge,PointerGetDatum( a ), PointerGetDatum( b ) )
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);
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}
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static bool gbt_tseq (const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(timestamp_eq,PointerGetDatum( a ), PointerGetDatum( b ) )
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);
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}
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static bool gbt_tsle (const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(timestamp_le,PointerGetDatum( a ), PointerGetDatum( b ) )
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);
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}
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static bool gbt_tslt (const void *a, const void *b)
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{
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return DatumGetBool(
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DirectFunctionCall2(timestamp_lt,PointerGetDatum( a ), PointerGetDatum( b ) )
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);
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}
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static int
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gbt_tskey_cmp(const void *a, const void *b)
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{
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if ( gbt_tsgt( (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_tslt( (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_ts,
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sizeof(Timestamp),
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gbt_tsgt,
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gbt_tsge,
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gbt_tseq,
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gbt_tsle,
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gbt_tslt,
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gbt_tskey_cmp
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};
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/**************************************************
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* timestamp ops
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**************************************************/
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static Timestamp * tstz_to_ts_gmt ( Timestamp * gmt, TimestampTz * ts )
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{
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int val, tz ;
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*gmt = *ts;
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DecodeSpecial(0, "gmt", &val);
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if ( ! TIMESTAMP_NOT_FINITE(*ts))
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{
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tz = val * 60;
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#ifdef HAVE_INT64_TIMESTAMP
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*gmt -= (tz * INT64CONST(1000000));
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#else
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*gmt -= tz;
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*gmt = JROUND(*gmt);
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#endif
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}
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return gmt;
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}
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Datum
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gbt_ts_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_tstz_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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tsKEY *r = (tsKEY *) palloc(sizeof(tsKEY));
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TimestampTz ts = *(TimestampTz *) DatumGetPointer(entry->key);
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Timestamp gmt ;
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tstz_to_ts_gmt ( &gmt, &ts );
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retval = palloc(sizeof(GISTENTRY));
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r->lower = r->upper = gmt ;
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gistentryinit(*retval, PointerGetDatum(r),
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entry->rel, entry->page,
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entry->offset, sizeof(tsKEY), 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_ts_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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Timestamp *query = (Timestamp *) PG_GETARG_POINTER(1);
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tsKEY *kkk = (tsKEY *) 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_tstz_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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TimestampTz *query = (Timestamp *) PG_GETARG_POINTER(1);
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char *kkk = (char *) 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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Timestamp qqq ;
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key.lower = (GBT_NUMKEY*) &kkk[0];
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key.upper = (GBT_NUMKEY*) &kkk[MAXALIGN(tinfo.size)];
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tstz_to_ts_gmt ( &qqq, query );
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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_ts_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(tsKEY));
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*(int *) PG_GETARG_POINTER(1) = sizeof(tsKEY);
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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_ts_penalty(PG_FUNCTION_ARGS)
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{
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tsKEY *origentry = (tsKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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tsKEY *newentry = (tsKEY *) 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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timestamp_mi,
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TimestampGetDatum(newentry->upper),
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TimestampGetDatum(origentry->upper)
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));
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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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timestamp_mi,
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TimestampGetDatum(origentry->lower),
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TimestampGetDatum(newentry->lower)
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));
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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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timestamp_mi,
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TimestampGetDatum(origentry->upper),
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TimestampGetDatum(origentry->lower)
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));
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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_ts_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_ts_same(PG_FUNCTION_ARGS)
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{
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tsKEY *b1 = (tsKEY *) PG_GETARG_POINTER(0);
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tsKEY *b2 = (tsKEY *) 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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