584 lines
14 KiB
C
584 lines
14 KiB
C
#include "postgres.h"
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#include "access/gist.h"
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#include "access/itup.h"
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#include "access/nbtree.h"
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#include "utils/palloc.h"
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#include "utils/geo_decls.h"
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#include "utils/elog.h"
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typedef int (*CMPFUNC) (const void *a, const void *b);
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typedef void (*BINARY_UNION) (Datum *, char *);
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typedef struct intkey
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{
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int4 lower;
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int4 upper;
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} INT4KEY;
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typedef struct tskey
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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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/* used for sorting */
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typedef struct rix
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{
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int index;
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char *r;
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} RIX;
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/*
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** int4key in/out
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*/
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PG_FUNCTION_INFO_V1(int4key_in);
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PG_FUNCTION_INFO_V1(int4key_out);
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Datum int4key_in(PG_FUNCTION_ARGS);
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Datum int4key_out(PG_FUNCTION_ARGS);
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/*
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** tskey in/out
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*/
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PG_FUNCTION_INFO_V1(tskey_in);
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PG_FUNCTION_INFO_V1(tskey_out);
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Datum tskey_in(PG_FUNCTION_ARGS);
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Datum tskey_out(PG_FUNCTION_ARGS);
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/*
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** int4 ops
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*/
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PG_FUNCTION_INFO_V1(gint4_compress);
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PG_FUNCTION_INFO_V1(gint4_union);
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PG_FUNCTION_INFO_V1(gint4_picksplit);
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PG_FUNCTION_INFO_V1(gint4_consistent);
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PG_FUNCTION_INFO_V1(gint4_penalty);
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PG_FUNCTION_INFO_V1(gint4_same);
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Datum gint4_compress(PG_FUNCTION_ARGS);
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Datum gint4_union(PG_FUNCTION_ARGS);
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Datum gint4_picksplit(PG_FUNCTION_ARGS);
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Datum gint4_consistent(PG_FUNCTION_ARGS);
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Datum gint4_penalty(PG_FUNCTION_ARGS);
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Datum gint4_same(PG_FUNCTION_ARGS);
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static void gint4_binary_union(Datum *r1, char *r2);
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static int int4key_cmp(const void *a, const void *b);
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/*
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** timestamp ops
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*/
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PG_FUNCTION_INFO_V1(gts_compress);
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PG_FUNCTION_INFO_V1(gts_union);
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PG_FUNCTION_INFO_V1(gts_picksplit);
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PG_FUNCTION_INFO_V1(gts_consistent);
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PG_FUNCTION_INFO_V1(gts_penalty);
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PG_FUNCTION_INFO_V1(gts_same);
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Datum gts_compress(PG_FUNCTION_ARGS);
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Datum gts_union(PG_FUNCTION_ARGS);
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Datum gts_picksplit(PG_FUNCTION_ARGS);
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Datum gts_consistent(PG_FUNCTION_ARGS);
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Datum gts_penalty(PG_FUNCTION_ARGS);
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Datum gts_same(PG_FUNCTION_ARGS);
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static void gts_binary_union(Datum *r1, char *r2);
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static int tskey_cmp(const void *a, const void *b);
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#define TimestampGetDatumFast(X) Float8GetDatumFast(X)
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/* define for comparison */
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#define TSGE( ts1, ts2 ) (DatumGetBool(DirectFunctionCall2( \
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timestamp_ge, \
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PointerGetDatum( ts1 ), \
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PointerGetDatum( ts2 ) \
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)))
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#define TSGT( ts1, ts2 ) (DatumGetBool(DirectFunctionCall2( \
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timestamp_gt, \
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PointerGetDatum( ts1 ), \
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PointerGetDatum( ts2 ) \
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)))
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#define TSEQ( ts1, ts2 ) (DatumGetBool(DirectFunctionCall2( \
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timestamp_eq, \
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PointerGetDatum( ts1 ), \
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PointerGetDatum( ts2 ) \
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)))
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#define TSLT( ts1, ts2 ) (DatumGetBool(DirectFunctionCall2( \
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timestamp_lt, \
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PointerGetDatum( ts1 ), \
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PointerGetDatum( ts2 ) \
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)))
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#define TSLE( ts1, ts2 ) (DatumGetBool(DirectFunctionCall2( \
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timestamp_le, \
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PointerGetDatum( ts1 ), \
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PointerGetDatum( ts2 ) \
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)))
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/*
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** Common btree-function (for all ops)
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*/
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static GIST_SPLITVEC *btree_picksplit(bytea *entryvec, GIST_SPLITVEC *v,
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BINARY_UNION bu, CMPFUNC cmp);
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PG_FUNCTION_INFO_V1(btree_decompress);
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Datum btree_decompress(PG_FUNCTION_ARGS);
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/**************************************************
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* int4 ops
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**************************************************/
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Datum
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gint4_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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INT4KEY *r = palloc(sizeof(INT4KEY));
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retval = palloc(sizeof(GISTENTRY));
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r->lower = r->upper = (entry->key);
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gistentryinit(*retval, PointerGetDatum(r), entry->rel, entry->page,
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entry->offset, sizeof(INT4KEY), 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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gint4_consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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int4 query = PG_GETARG_INT32(1);
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INT4KEY *kkk = (INT4KEY *) DatumGetPointer(entry->key);
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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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bool retval;
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switch (strategy)
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{
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case BTLessEqualStrategyNumber:
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retval = (query >= kkk->lower);
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break;
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case BTLessStrategyNumber:
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if (GIST_LEAF(entry))
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retval = (query > kkk->lower);
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else
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retval = (query >= kkk->lower);
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break;
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case BTEqualStrategyNumber:
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/* in leaf page kkk->lower always = kkk->upper */
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if (GIST_LEAF(entry))
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retval = (query == kkk->lower);
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else
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retval = (kkk->lower <= query && query <= kkk->upper);
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break;
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case BTGreaterStrategyNumber:
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if (GIST_LEAF(entry))
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retval = (query < kkk->upper);
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else
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retval = (query <= kkk->upper);
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break;
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case BTGreaterEqualStrategyNumber:
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retval = (query <= kkk->upper);
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break;
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default:
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retval = FALSE;
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}
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PG_RETURN_BOOL(retval);
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}
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Datum
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gint4_union(PG_FUNCTION_ARGS)
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{
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bytea *entryvec = (bytea *) PG_GETARG_POINTER(0);
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int i,
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numranges;
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INT4KEY *cur,
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*out = palloc(sizeof(INT4KEY));
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numranges = (VARSIZE(entryvec) - VARHDRSZ) / sizeof(GISTENTRY);
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*(int *) PG_GETARG_POINTER(1) = sizeof(INT4KEY);
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cur = (INT4KEY *) DatumGetPointer((((GISTENTRY *) (VARDATA(entryvec)))[0].key));
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out->lower = cur->lower;
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out->upper = cur->upper;
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for (i = 1; i < numranges; i++)
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{
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cur = (INT4KEY *) DatumGetPointer((((GISTENTRY *) (VARDATA(entryvec)))[i].key));
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if (out->lower > cur->lower)
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out->lower = cur->lower;
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if (out->upper < cur->upper)
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out->upper = cur->upper;
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}
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PG_RETURN_POINTER(out);
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}
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Datum
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gint4_penalty(PG_FUNCTION_ARGS)
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{
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INT4KEY *origentry = (INT4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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INT4KEY *newentry = (INT4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
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float *result = (float *) PG_GETARG_POINTER(2);
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*result = Max(newentry->upper - origentry->upper, 0) +
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Max(origentry->lower - newentry->lower, 0);
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PG_RETURN_POINTER(result);
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}
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Datum
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gint4_picksplit(PG_FUNCTION_ARGS)
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{
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PG_RETURN_POINTER(btree_picksplit(
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(bytea *) PG_GETARG_POINTER(0),
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(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
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gint4_binary_union,
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int4key_cmp
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));
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}
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Datum
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gint4_same(PG_FUNCTION_ARGS)
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{
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INT4KEY *b1 = (INT4KEY *) PG_GETARG_POINTER(0);
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INT4KEY *b2 = (INT4KEY *) PG_GETARG_POINTER(1);
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bool *result = (bool *) PG_GETARG_POINTER(2);
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*result = (b1->lower == b2->lower && b1->upper == b2->upper) ? TRUE : FALSE;
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PG_RETURN_POINTER(result);
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}
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static void
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gint4_binary_union(Datum *r1, char *r2)
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{
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INT4KEY *b1;
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INT4KEY *b2 = (INT4KEY *) r2;
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if (!DatumGetPointer(*r1))
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{
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*r1 = PointerGetDatum(palloc(sizeof(INT4KEY)));
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b1 = (INT4KEY *) DatumGetPointer(*r1);
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b1->upper = b2->upper;
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b1->lower = b2->lower;
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}
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else
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{
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b1 = (INT4KEY *) DatumGetPointer(*r1);
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b1->lower = (b1->lower > b2->lower) ?
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b2->lower : b1->lower;
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b1->upper = (b1->upper > b2->upper) ?
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b1->upper : b2->upper;
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}
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}
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static int
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int4key_cmp(const void *a, const void *b)
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{
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return (((INT4KEY *) (((RIX *) a)->r))->lower - ((INT4KEY *) (((RIX *) b)->r))->lower);
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}
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/**************************************************
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* timestamp ops
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**************************************************/
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Datum
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gts_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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retval = palloc(sizeof(GISTENTRY));
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r->lower = r->upper = *(Timestamp *) (entry->key);
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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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gts_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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StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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bool retval;
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TSKEY *key;
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/*
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* * if entry is not leaf, use gbox_internal_consistent, * else use
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* gbox_leaf_consistent
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*/
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if (!entry->key)
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return FALSE;
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key = (TSKEY *) DatumGetPointer(entry->key);
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switch (strategy)
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{
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case BTLessEqualStrategyNumber:
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retval = TSGE(query, &(key->lower));
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break;
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case BTLessStrategyNumber:
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if (GIST_LEAF(entry))
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retval = TSGT(query, &(key->lower));
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else
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retval = TSGE(query, &(key->lower));
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break;
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case BTEqualStrategyNumber:
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/* in leaf page key->lower always = key->upper */
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if (GIST_LEAF(entry))
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retval = TSEQ(query, &(key->lower));
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else
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retval = (TSLE(&(key->lower), query) && TSLE(query, &(key->upper)));
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break;
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case BTGreaterStrategyNumber:
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if (GIST_LEAF(entry))
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retval = TSLT(query, &(key->upper));
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else
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retval = TSLE(query, &(key->upper));
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break;
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case BTGreaterEqualStrategyNumber:
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retval = TSLE(query, &(key->upper));
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break;
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default:
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retval = FALSE;
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}
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PG_RETURN_BOOL(retval);
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}
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Datum
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gts_union(PG_FUNCTION_ARGS)
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{
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bytea *entryvec = (bytea *) PG_GETARG_POINTER(0);
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int i,
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numranges;
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TSKEY *cur,
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*out = palloc(sizeof(TSKEY));
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numranges = (VARSIZE(entryvec) - VARHDRSZ) / sizeof(GISTENTRY);
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*(int *) PG_GETARG_POINTER(1) = sizeof(TSKEY);
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cur = (TSKEY *) DatumGetPointer((((GISTENTRY *) (VARDATA(entryvec)))[0].key));
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out->lower = cur->lower;
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out->upper = cur->upper;
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for (i = 1; i < numranges; i++)
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{
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cur = (TSKEY *) DatumGetPointer((((GISTENTRY *) (VARDATA(entryvec)))[i].key));
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if (TSGT(&out->lower, &cur->lower))
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out->lower = cur->lower;
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if (TSLT(&out->upper, &cur->upper))
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out->upper = cur->upper;
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}
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PG_RETURN_POINTER(out);
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}
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Datum
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gts_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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intr = DatumGetIntervalP(DirectFunctionCall2(
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timestamp_mi,
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TimestampGetDatumFast(newentry->upper),
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TimestampGetDatumFast(origentry->upper)));
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/* see interval_larger */
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*result = Max(intr->time + intr->month * (30.0 * 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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TimestampGetDatumFast(origentry->lower),
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TimestampGetDatumFast(newentry->lower)));
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/* see interval_larger */
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*result += Max(intr->time + intr->month * (30.0 * 86400), 0);
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pfree(intr);
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PG_RETURN_POINTER(result);
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}
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Datum
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gts_picksplit(PG_FUNCTION_ARGS)
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{
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PG_RETURN_POINTER(btree_picksplit(
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(bytea *) PG_GETARG_POINTER(0),
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(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
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gts_binary_union,
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tskey_cmp
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));
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}
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Datum
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gts_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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if (b1 && b2)
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*result = (TSEQ(&(b1->lower), &(b2->lower)) && TSEQ(&(b1->upper), &(b2->upper))) ? TRUE : FALSE;
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else
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*result = (b1 == NULL && b2 == NULL) ? TRUE : FALSE;
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PG_RETURN_POINTER(result);
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}
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static void
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gts_binary_union(Datum *r1, char *r2)
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{
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TSKEY *b1;
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TSKEY *b2 = (TSKEY *) r2;
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if (!DatumGetPointer(*r1))
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{
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*r1 = PointerGetDatum(palloc(sizeof(TSKEY)));
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b1 = (TSKEY *) DatumGetPointer(*r1);
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b1->upper = b2->upper;
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b1->lower = b2->lower;
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}
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else
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{
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b1 = (TSKEY *) DatumGetPointer(*r1);
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b1->lower = (TSGT(&b1->lower, &b2->lower)) ?
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b2->lower : b1->lower;
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b1->upper = (TSGT(&b1->upper, &b2->upper)) ?
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b1->upper : b2->upper;
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}
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}
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static int
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tskey_cmp(const void *a, const void *b)
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{
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return DatumGetInt32(
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DirectFunctionCall2(
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timestamp_cmp,
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TimestampGetDatumFast(((TSKEY *) (((RIX *) a)->r))->lower),
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TimestampGetDatumFast(((TSKEY *) (((RIX *) b)->r))->lower)
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)
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);
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}
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|
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/**************************************************
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* Common btree-function (for all ops)
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**************************************************/
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/*
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** The GiST PickSplit method
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*/
|
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static GIST_SPLITVEC *
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btree_picksplit(bytea *entryvec, GIST_SPLITVEC *v, BINARY_UNION bu, CMPFUNC cmp)
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{
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OffsetNumber i;
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RIX *array;
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OffsetNumber maxoff;
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int nbytes;
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maxoff = ((VARSIZE(entryvec) - VARHDRSZ) / sizeof(GISTENTRY)) - 1;
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nbytes = (maxoff + 2) * sizeof(OffsetNumber);
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v->spl_left = (OffsetNumber *) palloc(nbytes);
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v->spl_right = (OffsetNumber *) palloc(nbytes);
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v->spl_nleft = 0;
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v->spl_nright = 0;
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v->spl_ldatum = PointerGetDatum(0);
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v->spl_rdatum = PointerGetDatum(0);
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array = (RIX *) palloc(sizeof(RIX) * (maxoff + 1));
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|
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/* copy the data into RIXes, and sort the RIXes */
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for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
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{
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array[i].index = i;
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array[i].r = (char *) DatumGetPointer((((GISTENTRY *) (VARDATA(entryvec)))[i].key));
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}
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qsort((void *) &array[FirstOffsetNumber], maxoff - FirstOffsetNumber + 1,
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sizeof(RIX), cmp);
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|
|
|
for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
|
|
{
|
|
if (i <= (maxoff - FirstOffsetNumber + 1) / 2)
|
|
{
|
|
v->spl_left[v->spl_nleft] = array[i].index;
|
|
v->spl_nleft++;
|
|
(*bu) (&v->spl_ldatum, array[i].r);
|
|
}
|
|
else
|
|
{
|
|
v->spl_right[v->spl_nright] = array[i].index;
|
|
v->spl_nright++;
|
|
(*bu) (&v->spl_rdatum, array[i].r);
|
|
}
|
|
}
|
|
pfree(array);
|
|
|
|
return (v);
|
|
}
|
|
|
|
/*
|
|
** GiST DeCompress methods
|
|
** do not do anything.
|
|
*/
|
|
Datum
|
|
btree_decompress(PG_FUNCTION_ARGS)
|
|
{
|
|
PG_RETURN_POINTER(PG_GETARG_POINTER(0));
|
|
}
|
|
|
|
|
|
/**************************************************
|
|
* In/Out for keys, not really needed
|
|
**************************************************/
|
|
Datum
|
|
int4key_in(PG_FUNCTION_ARGS)
|
|
{
|
|
INT4KEY *key = palloc(sizeof(INT4KEY));
|
|
|
|
if (sscanf(PG_GETARG_POINTER(0), "%d|%d", &(key->lower), &(key->upper)) != 2)
|
|
elog(ERROR, "Error in input format");
|
|
|
|
PG_RETURN_POINTER(key);
|
|
}
|
|
|
|
Datum
|
|
int4key_out(PG_FUNCTION_ARGS)
|
|
{
|
|
INT4KEY *key = (INT4KEY *) PG_GETARG_POINTER(0);
|
|
char *str = palloc(sizeof(char) * 22);
|
|
|
|
sprintf(str, "%d|%d", key->lower, key->upper);
|
|
PG_RETURN_POINTER(str);
|
|
}
|
|
|
|
Datum
|
|
tskey_in(PG_FUNCTION_ARGS)
|
|
{
|
|
elog(ERROR, "Not implemented");
|
|
PG_RETURN_POINTER(NULL);
|
|
}
|
|
|
|
Datum
|
|
tskey_out(PG_FUNCTION_ARGS)
|
|
{
|
|
elog(ERROR, "Not implemented");
|
|
PG_RETURN_POINTER(NULL);
|
|
}
|