mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-27 07:27:19 +02:00
- Fix wrong index results on text, char, varchar for multibyte strings - Fix some SIGFPE signals - Add support for infinite timestamps - Because of locale settings, btree_gist can not be a prefix index anymore (for text). Each node holds now just the lower and upper boundary.
281 lines
6.0 KiB
C
281 lines
6.0 KiB
C
#include "btree_gist.h"
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#include "btree_utils_num.h"
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#include "utils/datetime.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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#define P_TimestampGetDatum(x) PointerGetDatum( &(x) )
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static bool
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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
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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
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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
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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
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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 if (gbt_tslt((void *) &(((Nsrt *) a)->t[0]), (void *) &(((Nsrt *) b)->t[0])))
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return -1;
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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 *
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tstz_to_ts_gmt(Timestamp *gmt, TimestampTz *ts)
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{
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int val,
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tz;
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*gmt = *ts;
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DecodeSpecial(0, "gmt", &val);
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if ( *ts < DT_NOEND && *ts > DT_NOBEGIN )
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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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#define penalty_check_max_float(val) do { \
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if ( val > FLT_MAX ) \
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val = FLT_MAX; \
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if ( val < -FLT_MAX ) \
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val = -FLT_MAX; \
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} while(false);
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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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double orgdbl[2],
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newdbl[2];
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/*
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We are allways using "double" timestamps here.
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Precision should be good enough.
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*/
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orgdbl[0] = ( (double) origentry->lower ) ;
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orgdbl[1] = ( (double) origentry->upper ) ;
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newdbl[0] = ( (double) newentry->lower ) ;
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newdbl[1] = ( (double) newentry->upper ) ;
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penalty_check_max_float( orgdbl[0] );
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penalty_check_max_float( orgdbl[1] );
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penalty_check_max_float( newdbl[0] );
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penalty_check_max_float( newdbl[1] );
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penalty_num(result,orgdbl[0],orgdbl[1],newdbl[0],newdbl[1]);
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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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