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https://github.com/postgres/postgres.git
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f2c064afcb
boxes. Change interface to user-defined GiST support methods union and picksplit. Now instead of bytea struct it used special GistEntryVector structure.
267 lines
7.0 KiB
C
267 lines
7.0 KiB
C
#include "btree_gist.h"
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#define __DEFINE_BTREE_TYPE_HERE__ 1
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typedef struct __BTREE_GIST_TYPE__key
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{
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__BTREE_GIST_TYPE__ lower;
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__BTREE_GIST_TYPE__ upper;
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} __BTREE_GIST_TYPE__KEY;
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/*
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** __BTREE_GIST_TYPE__key in/out
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*/
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PG_FUNCTION_INFO_V1(__BTREE_GIST_TYPE2__key_in);
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PG_FUNCTION_INFO_V1(__BTREE_GIST_TYPE2__key_out);
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Datum __BTREE_GIST_TYPE2__key_in(PG_FUNCTION_ARGS);
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Datum __BTREE_GIST_TYPE2__key_out(PG_FUNCTION_ARGS);
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/*
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** __BTREE_GIST_TYPE__ ops
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*/
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PG_FUNCTION_INFO_V1(g__BTREE_GIST_TYPE2___compress);
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PG_FUNCTION_INFO_V1(g__BTREE_GIST_TYPE2___union);
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PG_FUNCTION_INFO_V1(g__BTREE_GIST_TYPE2___picksplit);
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PG_FUNCTION_INFO_V1(g__BTREE_GIST_TYPE2___consistent);
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PG_FUNCTION_INFO_V1(g__BTREE_GIST_TYPE2___penalty);
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PG_FUNCTION_INFO_V1(g__BTREE_GIST_TYPE2___same);
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Datum g__BTREE_GIST_TYPE2___compress(PG_FUNCTION_ARGS);
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Datum g__BTREE_GIST_TYPE2___union(PG_FUNCTION_ARGS);
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Datum g__BTREE_GIST_TYPE2___picksplit(PG_FUNCTION_ARGS);
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Datum g__BTREE_GIST_TYPE2___consistent(PG_FUNCTION_ARGS);
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Datum g__BTREE_GIST_TYPE2___penalty(PG_FUNCTION_ARGS);
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Datum g__BTREE_GIST_TYPE2___same(PG_FUNCTION_ARGS);
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static void g__BTREE_GIST_TYPE2___binary_union(Datum *r1, char *r2);
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static int __BTREE_GIST_TYPE2__key_cmp(const void *a, const void *b);
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/**************************************************
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* __BTREE_GIST_TYPE__ ops
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**************************************************/
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Datum
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g__BTREE_GIST_TYPE2___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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__BTREE_GIST_TYPE__KEY *r = ( __BTREE_GIST_TYPE__KEY * ) palloc(sizeof(__BTREE_GIST_TYPE__KEY));
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#ifdef BTREE_GIST_INT2
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int16 leaf = DatumGetInt16(entry->key);
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#endif
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#ifdef BTREE_GIST_INT4
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int32 leaf = DatumGetInt32(entry->key);
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#endif
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#ifdef BTREE_GIST_INT8
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int64 leaf = DatumGetInt64(entry->key);
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#endif
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#ifdef BTREE_GIST_FLOAT4
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float4 leaf = DatumGetFloat4(entry->key);
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#endif
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#ifdef BTREE_GIST_FLOAT8
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float8 leaf = DatumGetFloat8(entry->key);
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#endif
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retval = palloc(sizeof(GISTENTRY));
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r->lower = r->upper = leaf ;
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gistentryinit(*retval, PointerGetDatum(r), entry->rel, entry->page,
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entry->offset, sizeof(__BTREE_GIST_TYPE__KEY), 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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g__BTREE_GIST_TYPE2___consistent(PG_FUNCTION_ARGS)
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{
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GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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#ifdef BTREE_GIST_INT2
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int16 query = PG_GETARG_INT16(1);
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#endif
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#ifdef BTREE_GIST_INT4
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int32 query = PG_GETARG_INT32(1);
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#endif
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#ifdef BTREE_GIST_INT8
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int64 query = PG_GETARG_INT64(1);
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#endif
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#ifdef BTREE_GIST_FLOAT4
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float4 query = PG_GETARG_FLOAT4(1);
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#endif
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#ifdef BTREE_GIST_FLOAT8
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float8 query = PG_GETARG_FLOAT8(1);
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#endif
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__BTREE_GIST_TYPE__KEY *kkk = (__BTREE_GIST_TYPE__KEY *) 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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g__BTREE_GIST_TYPE2___union(PG_FUNCTION_ARGS)
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{
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GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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int i,
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numranges;
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__BTREE_GIST_TYPE__KEY *cur,
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*out = palloc(sizeof(__BTREE_GIST_TYPE__KEY));
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numranges = entryvec->n;
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*(int *) PG_GETARG_POINTER(1) = sizeof(__BTREE_GIST_TYPE__KEY);
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cur = (__BTREE_GIST_TYPE__KEY *) DatumGetPointer((entryvec->vector[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 = (__BTREE_GIST_TYPE__KEY *) DatumGetPointer((entryvec->vector[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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g__BTREE_GIST_TYPE2___penalty(PG_FUNCTION_ARGS)
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{
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__BTREE_GIST_TYPE__KEY *origentry = (__BTREE_GIST_TYPE__KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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__BTREE_GIST_TYPE__KEY *newentry = (__BTREE_GIST_TYPE__KEY *) 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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g__BTREE_GIST_TYPE2___picksplit(PG_FUNCTION_ARGS)
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{
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PG_RETURN_POINTER(btree_picksplit(
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(GistEntryVector *) PG_GETARG_POINTER(0),
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(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
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g__BTREE_GIST_TYPE2___binary_union,
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__BTREE_GIST_TYPE2__key_cmp
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));
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}
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Datum
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g__BTREE_GIST_TYPE2___same(PG_FUNCTION_ARGS)
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{
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__BTREE_GIST_TYPE__KEY *b1 = (__BTREE_GIST_TYPE__KEY *) PG_GETARG_POINTER(0);
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__BTREE_GIST_TYPE__KEY *b2 = (__BTREE_GIST_TYPE__KEY *) 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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g__BTREE_GIST_TYPE2___binary_union(Datum *r1, char *r2)
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{
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__BTREE_GIST_TYPE__KEY *b1;
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__BTREE_GIST_TYPE__KEY *b2 = (__BTREE_GIST_TYPE__KEY *) r2;
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if (!DatumGetPointer(*r1))
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{
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*r1 = PointerGetDatum(palloc(sizeof(__BTREE_GIST_TYPE__KEY)));
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b1 = (__BTREE_GIST_TYPE__KEY *) 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 = (__BTREE_GIST_TYPE__KEY *) 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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__BTREE_GIST_TYPE2__key_cmp(const void *a, const void *b)
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{
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if (((__BTREE_GIST_TYPE__KEY *) (((RIX *) a)->r))->lower > ((__BTREE_GIST_TYPE__KEY *) (((RIX *) b)->r))->lower){
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return 1;
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} else if (((__BTREE_GIST_TYPE__KEY *) (((RIX *) a)->r))->lower < ((__BTREE_GIST_TYPE__KEY *) (((RIX *) b)->r))->lower){
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return -1;
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} else {
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return 0;
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}
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}
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/**************************************************
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* In/Out for keys
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**************************************************/
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Datum
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__BTREE_GIST_TYPE2__key_in(PG_FUNCTION_ARGS)
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{
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ereport(ERROR,
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(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
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errmsg("<datatype>key_in() not implemented")));
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PG_RETURN_POINTER(NULL);
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}
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Datum
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__BTREE_GIST_TYPE2__key_out(PG_FUNCTION_ARGS)
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{
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ereport(ERROR,
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(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
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errmsg("<datatype>key_out() not implemented")));
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PG_RETURN_POINTER(NULL);
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}
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