mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-05 16:53:23 +02:00
82bbb60c30
The macaddr opclass stores two macaddr structs (each of size 6) in an index column that's declared as being of type gbtreekey16, ie 16 bytes. In the original coding this led to passing a palloc'd value of size 12 to the index insertion code, so that data would be fetched past the end of the allocated value during index tuple construction. This makes valgrind unhappy. In principle it could result in a SIGSEGV, though with the current implementation of palloc there's no risk since the 12-byte request size would be rounded up to 16 bytes anyway. To fix, add a field to struct gbtree_ninfo showing the declared size of the index datums, and use that in the palloc requests; and use palloc0 to be sure that any wasted bytes are cleanly initialized. Per report from Andres Freund. No back-patch since there's no current risk of a real problem.
421 lines
9.5 KiB
C
421 lines
9.5 KiB
C
/*
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* contrib/btree_gist/btree_ts.c
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*/
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#include "postgres.h"
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#include "btree_gist.h"
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#include "btree_utils_num.h"
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#include "utils/builtins.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_ts_distance);
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PG_FUNCTION_INFO_V1(gbt_tstz_consistent);
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PG_FUNCTION_INFO_V1(gbt_tstz_distance);
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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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#ifdef USE_FLOAT8_BYVAL
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#define TimestampGetDatumFast(X) TimestampGetDatum(X)
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#else
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#define TimestampGetDatumFast(X) PointerGetDatum(&(X))
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#endif
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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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const Timestamp *aa = (const Timestamp *) a;
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const Timestamp *bb = (const Timestamp *) b;
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return DatumGetBool(DirectFunctionCall2(timestamp_gt,
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TimestampGetDatumFast(*aa),
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TimestampGetDatumFast(*bb)));
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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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const Timestamp *aa = (const Timestamp *) a;
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const Timestamp *bb = (const Timestamp *) b;
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return DatumGetBool(DirectFunctionCall2(timestamp_ge,
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TimestampGetDatumFast(*aa),
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TimestampGetDatumFast(*bb)));
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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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const Timestamp *aa = (const Timestamp *) a;
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const Timestamp *bb = (const Timestamp *) b;
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return DatumGetBool(DirectFunctionCall2(timestamp_eq,
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TimestampGetDatumFast(*aa),
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TimestampGetDatumFast(*bb)));
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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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const Timestamp *aa = (const Timestamp *) a;
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const Timestamp *bb = (const Timestamp *) b;
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return DatumGetBool(DirectFunctionCall2(timestamp_le,
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TimestampGetDatumFast(*aa),
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TimestampGetDatumFast(*bb)));
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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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const Timestamp *aa = (const Timestamp *) a;
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const Timestamp *bb = (const Timestamp *) b;
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return DatumGetBool(DirectFunctionCall2(timestamp_lt,
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TimestampGetDatumFast(*aa),
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TimestampGetDatumFast(*bb)));
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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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tsKEY *ia = (tsKEY *) (((const Nsrt *) a)->t);
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tsKEY *ib = (tsKEY *) (((const Nsrt *) b)->t);
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int res;
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res = DatumGetInt32(DirectFunctionCall2(timestamp_cmp, TimestampGetDatumFast(ia->lower), TimestampGetDatumFast(ib->lower)));
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if (res == 0)
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return DatumGetInt32(DirectFunctionCall2(timestamp_cmp, TimestampGetDatumFast(ia->upper), TimestampGetDatumFast(ib->upper)));
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return res;
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}
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static float8
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gbt_ts_dist(const void *a, const void *b)
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{
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const Timestamp *aa = (const Timestamp *) a;
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const Timestamp *bb = (const Timestamp *) b;
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Interval *i;
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if (TIMESTAMP_NOT_FINITE(*aa) || TIMESTAMP_NOT_FINITE(*bb))
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return get_float8_infinity();
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i = DatumGetIntervalP(DirectFunctionCall2(timestamp_mi,
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TimestampGetDatumFast(*aa),
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TimestampGetDatumFast(*bb)));
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return (float8) Abs(INTERVAL_TO_SEC(i));
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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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16, /* sizeof(gbtreekey16) */
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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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gbt_ts_dist
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};
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PG_FUNCTION_INFO_V1(ts_dist);
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Datum
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ts_dist(PG_FUNCTION_ARGS)
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{
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Timestamp a = PG_GETARG_TIMESTAMP(0);
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Timestamp b = PG_GETARG_TIMESTAMP(1);
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Interval *r;
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if (TIMESTAMP_NOT_FINITE(a) || TIMESTAMP_NOT_FINITE(b))
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{
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Interval *p = palloc(sizeof(Interval));
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p->day = INT_MAX;
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p->month = INT_MAX;
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#ifdef HAVE_INT64_TIMESTAMP
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p->time = INT64CONST(0x7FFFFFFFFFFFFFFF);
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#else
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p->time = DBL_MAX;
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#endif
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PG_RETURN_INTERVAL_P(p);
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}
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else
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r = DatumGetIntervalP(DirectFunctionCall2(timestamp_mi,
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PG_GETARG_DATUM(0),
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PG_GETARG_DATUM(1)));
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PG_RETURN_INTERVAL_P(abs_interval(r));
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}
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PG_FUNCTION_INFO_V1(tstz_dist);
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Datum
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tstz_dist(PG_FUNCTION_ARGS)
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{
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TimestampTz a = PG_GETARG_TIMESTAMPTZ(0);
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TimestampTz b = PG_GETARG_TIMESTAMPTZ(1);
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Interval *r;
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if (TIMESTAMP_NOT_FINITE(a) || TIMESTAMP_NOT_FINITE(b))
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{
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Interval *p = palloc(sizeof(Interval));
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p->day = INT_MAX;
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p->month = INT_MAX;
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#ifdef HAVE_INT64_TIMESTAMP
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p->time = INT64CONST(0x7FFFFFFFFFFFFFFF);
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#else
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p->time = DBL_MAX;
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#endif
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PG_RETURN_INTERVAL_P(p);
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}
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r = DatumGetIntervalP(DirectFunctionCall2(timestamp_mi,
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PG_GETARG_DATUM(0),
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PG_GETARG_DATUM(1)));
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PG_RETURN_INTERVAL_P(abs_interval(r));
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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(TimestampTz ts)
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{
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Timestamp gmt;
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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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#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 = DatumGetTimestampTz(entry->key);
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Timestamp gmt;
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gmt = tstz_to_ts_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, 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 = PG_GETARG_TIMESTAMP(1);
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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/* Oid subtype = PG_GETARG_OID(3); */
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bool *recheck = (bool *) PG_GETARG_POINTER(4);
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tsKEY *kkk = (tsKEY *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key;
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/* All cases served by this function are exact */
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*recheck = false;
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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_ts_distance(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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Timestamp query = PG_GETARG_TIMESTAMP(1);
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/* Oid subtype = PG_GETARG_OID(3); */
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tsKEY *kkk = (tsKEY *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key;
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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_FLOAT8(
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gbt_num_distance(&key, (void *) &query, 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 = PG_GETARG_TIMESTAMPTZ(1);
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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/* Oid subtype = PG_GETARG_OID(3); */
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bool *recheck = (bool *) PG_GETARG_POINTER(4);
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char *kkk = (char *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key;
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Timestamp qqq;
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/* All cases served by this function are exact */
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*recheck = false;
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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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qqq = tstz_to_ts_gmt(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_tstz_distance(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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TimestampTz query = PG_GETARG_TIMESTAMPTZ(1);
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/* Oid subtype = PG_GETARG_OID(3); */
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char *kkk = (char *) DatumGetPointer(entry->key);
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GBT_NUMKEY_R key;
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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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qqq = tstz_to_ts_gmt(query);
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PG_RETURN_FLOAT8(
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gbt_num_distance(&key, (void *) &qqq, 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. Precision should be good
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* 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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