640 lines
15 KiB
C
640 lines
15 KiB
C
#include "postgres.h"
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#include <float.h>
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#include "access/gist.h"
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#include "access/itup.h"
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#include "access/rtree.h"
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#include "utils/elog.h"
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#include "utils/palloc.h"
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#include "utils/array.h"
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#include "utils/builtins.h"
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#include "storage/bufpage.h"
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#include "txtidx.h"
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#include "query.h"
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#include "gistidx.h"
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#include "crc32.h"
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PG_FUNCTION_INFO_V1( gtxtidx_in );
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Datum gtxtidx_in(PG_FUNCTION_ARGS);
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PG_FUNCTION_INFO_V1( gtxtidx_out );
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Datum gtxtidx_out(PG_FUNCTION_ARGS);
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PG_FUNCTION_INFO_V1( gtxtidx_compress );
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Datum gtxtidx_compress(PG_FUNCTION_ARGS);
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PG_FUNCTION_INFO_V1( gtxtidx_decompress );
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Datum gtxtidx_decompress(PG_FUNCTION_ARGS);
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PG_FUNCTION_INFO_V1( gtxtidx_consistent );
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Datum gtxtidx_consistent(PG_FUNCTION_ARGS);
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PG_FUNCTION_INFO_V1( gtxtidx_union );
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Datum gtxtidx_union(PG_FUNCTION_ARGS);
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PG_FUNCTION_INFO_V1( gtxtidx_same );
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Datum gtxtidx_same(PG_FUNCTION_ARGS);
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PG_FUNCTION_INFO_V1( gtxtidx_penalty );
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Datum gtxtidx_penalty(PG_FUNCTION_ARGS);
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PG_FUNCTION_INFO_V1( gtxtidx_picksplit );
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Datum gtxtidx_picksplit(PG_FUNCTION_ARGS);
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#define GETENTRY(vec,pos) ((GISTTYPE *) DatumGetPointer(((GISTENTRY *) VARDATA(vec))[(pos)].key))
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#define SUMBIT(val) ( \
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GETBITBYTE(val,0) + \
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GETBITBYTE(val,1) + \
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GETBITBYTE(val,2) + \
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GETBITBYTE(val,3) + \
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GETBITBYTE(val,4) + \
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GETBITBYTE(val,5) + \
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GETBITBYTE(val,6) + \
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GETBITBYTE(val,7) \
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)
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Datum
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gtxtidx_in(PG_FUNCTION_ARGS) {
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elog(ERROR,"Not implemented");
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PG_RETURN_DATUM(0);
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}
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Datum
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gtxtidx_out(PG_FUNCTION_ARGS) {
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elog(ERROR,"Not implemented");
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PG_RETURN_DATUM(0);
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}
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static int
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compareint( const void * a, const void * b ) {
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if ( *((int4*)a) == *((int4*)b) ) return 0;
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return ( *((int4*)a) > *((int4*)b) ) ? 1 : -1;
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}
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static int
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uniqueint( int4* a, int4 l ) {
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int4 *ptr, *res;
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if ( l == 1 )
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return l;
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ptr = res = a;
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qsort((void*)a, l, sizeof(int4), compareint );
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while (ptr - a < l)
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if (*ptr != *res)
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*(++res) = *ptr++;
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else
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ptr++;
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return res + 1 - a;
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}
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Datum
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gtxtidx_compress(PG_FUNCTION_ARGS) {
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GISTENTRY *entry = (GISTENTRY *)PG_GETARG_POINTER(0);
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GISTENTRY *retval = entry;
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if ( entry->leafkey ) { /* txtidx */
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GISTTYPE *res;
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txtidx *toastedval = (txtidx*)DatumGetPointer( entry->key );
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txtidx *val = (txtidx*)DatumGetPointer( PG_DETOAST_DATUM(entry->key) );
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int4 len;
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int4 *arr;
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WordEntry *ptr = ARRPTR(val);
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char *words = STRPTR(val);
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len = CALCGTSIZE( ARRKEY, val->size );
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res = (GISTTYPE*)palloc( len );
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res->len = len;
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res->flag = ARRKEY;
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arr = GETARR(res);
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len = val->size;
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while( len-- ) {
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*arr = crc32_sz( (uint8*)&words[ ptr->pos ], ptr->len );
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arr++; ptr++;
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}
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if ( val != toastedval )
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pfree(val);
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len = uniqueint( GETARR(res), val->size );
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if ( len != val->size ) {
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/* there is a collision of hash-function;
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len is always less than val->size */
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len = CALCGTSIZE( ARRKEY, len );
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res = (GISTTYPE*)repalloc( (void*)res, len );
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res->len = len;
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}
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retval = (GISTENTRY*)palloc(sizeof(GISTENTRY));
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gistentryinit(*retval, PointerGetDatum(res),
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entry->rel, entry->page,
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entry->offset, res->len, FALSE);
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} else if ( ISSIGNKEY(DatumGetPointer( entry->key )) &&
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! ISALLTRUE(DatumGetPointer( entry->key )) ){
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int4 i,len;
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GISTTYPE *res;
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BITVECP sign = GETSIGN( DatumGetPointer( entry->key ) );
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LOOPBYTE(
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if ( (sign[i] & 0xff) != 0xff )
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PG_RETURN_POINTER(retval);
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);
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len = CALCGTSIZE( SIGNKEY|ALLISTRUE, 0 );
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res = (GISTTYPE*)palloc( len );
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res->len = len;
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res->flag = SIGNKEY | ALLISTRUE;
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retval = (GISTENTRY*)palloc(sizeof(GISTENTRY));
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gistentryinit(*retval, PointerGetDatum(res),
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entry->rel, entry->page,
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entry->offset, res->len, FALSE);
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}
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PG_RETURN_POINTER(retval);
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}
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Datum
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gtxtidx_decompress(PG_FUNCTION_ARGS) {
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GISTENTRY *entry = (GISTENTRY *)PG_GETARG_POINTER(0);
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GISTTYPE *key = (GISTTYPE*)DatumGetPointer( PG_DETOAST_DATUM(entry->key) );
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if ( key != (GISTTYPE*)DatumGetPointer(entry->key) ) {
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GISTENTRY *retval = (GISTENTRY*)palloc(sizeof(GISTENTRY));
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gistentryinit(*retval, PointerGetDatum(key),
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entry->rel, entry->page,
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entry->offset, key->len, FALSE);
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PG_RETURN_POINTER(retval);
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}
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PG_RETURN_POINTER(entry);
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}
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typedef struct {
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int4 *arrb;
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int4 *arre;
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} CHKVAL;
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/*
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* is there value 'val' in array or not ?
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*/
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static bool
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checkcondition_arr( void *checkval, ITEM* val ) {
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int4 *StopLow = ((CHKVAL*)checkval)->arrb;
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int4 *StopHigh = ((CHKVAL*)checkval)->arre;
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int4 *StopMiddle;
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/* Loop invariant: StopLow <= val < StopHigh */
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while (StopLow < StopHigh) {
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StopMiddle = StopLow + (StopHigh - StopLow) / 2;
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if (*StopMiddle == val->val)
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return (true);
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else if (*StopMiddle < val->val )
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StopLow = StopMiddle + 1;
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else
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StopHigh = StopMiddle;
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}
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return (false);
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}
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static bool
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checkcondition_bit( void *checkval, ITEM* val ) {
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return GETBIT( checkval, HASHVAL( val->val ) );
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}
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Datum
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gtxtidx_consistent(PG_FUNCTION_ARGS) {
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QUERYTYPE *query = (QUERYTYPE *)PG_GETARG_POINTER(1);
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GISTTYPE *key = (GISTTYPE *)DatumGetPointer(
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((GISTENTRY *)PG_GETARG_POINTER(0))->key
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);
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if ( ISSIGNKEY(key) ) {
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if ( ISALLTRUE(key) )
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PG_RETURN_BOOL(true);
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PG_RETURN_BOOL( execute(
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GETQUERY(query),
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(void*)GETSIGN(key), false,
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checkcondition_bit
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));
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} else { /* only leaf pages */
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CHKVAL chkval;
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chkval.arrb = GETARR(key);
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chkval.arre = chkval.arrb + ARRNELEM(key);
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PG_RETURN_BOOL( execute(
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GETQUERY(query),
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(void*)&chkval, true,
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checkcondition_arr
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) );
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}
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}
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static int4
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unionkey( BITVECP sbase, GISTTYPE *add ) {
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int4 i;
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if ( ISSIGNKEY(add) ) {
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BITVECP sadd = GETSIGN( add );
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if ( ISALLTRUE(add) )
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return 1;
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LOOPBYTE(
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sbase[i] |= sadd[i];
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);
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} else {
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int4 *ptr = GETARR( add );
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for(i=0;i<ARRNELEM(add);i++)
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HASH( sbase, ptr[i] );
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}
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return 0;
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}
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Datum
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gtxtidx_union(PG_FUNCTION_ARGS) {
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bytea *entryvec = (bytea *) PG_GETARG_POINTER(0);
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int *size = (int *) PG_GETARG_POINTER(1);
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BITVEC base;
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int4 len = (VARSIZE(entryvec) - VARHDRSZ) / sizeof(GISTENTRY);
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int4 i;
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int4 flag = 0;
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GISTTYPE *result;
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MemSet( (void*)base, 0, sizeof(BITVEC) );
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for(i=0;i<len;i++) {
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if ( unionkey( base, GETENTRY(entryvec, i) ) ) {
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flag = ALLISTRUE;
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break;
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}
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}
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flag |= SIGNKEY;
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len = CALCGTSIZE( flag, 0 );
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result = (GISTTYPE*)palloc( len );
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*size = result->len = len;
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result->flag = flag;
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if ( ! ISALLTRUE(result) )
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memcpy((void*)GETSIGN(result), (void*)base, sizeof( BITVEC ) );
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PG_RETURN_POINTER( result );
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}
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Datum
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gtxtidx_same(PG_FUNCTION_ARGS) {
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GISTTYPE *a = (GISTTYPE*)PG_GETARG_POINTER(0);
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GISTTYPE *b = (GISTTYPE*)PG_GETARG_POINTER(1);
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bool *result = (bool *)PG_GETARG_POINTER(2);
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if ( ISSIGNKEY(a) ) { /* then b also ISSIGNKEY */
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if ( ISALLTRUE(a) && ISALLTRUE(b) ) {
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*result = true;
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} else if ( ISALLTRUE(a) ) {
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*result = false;
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} else if ( ISALLTRUE(b) ) {
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*result = false;
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} else {
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int4 i;
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BITVECP sa=GETSIGN(a), sb=GETSIGN(b);
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*result = true;
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LOOPBYTE(
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if ( sa[i] != sb[i] ) {
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*result = false;
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break;
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}
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);
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}
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} else { /* a and b ISARRKEY */
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int4 lena = ARRNELEM(a), lenb = ARRNELEM(b);
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if ( lena != lenb ) {
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*result = false;
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} else {
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int4 *ptra = GETARR(a), *ptrb = GETARR(b);
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int4 i;
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*result = true;
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for(i=0;i<lena;i++)
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if ( ptra[i] != ptrb[i] ) {
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*result = false;
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break;
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}
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}
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}
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PG_RETURN_POINTER(result);
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}
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static int4
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sizebitvec( BITVECP sign ) {
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int4 size=0, i;
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LOOPBYTE(
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size += SUMBIT(*(char*)sign);
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sign = (BITVECP) ( ((char*)sign) + 1 );
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);
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return size;
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}
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Datum
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gtxtidx_penalty(PG_FUNCTION_ARGS) {
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GISTENTRY *origentry = (GISTENTRY *)PG_GETARG_POINTER(0); /*always ISSIGNKEY*/
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GISTENTRY *newentry = (GISTENTRY *)PG_GETARG_POINTER(1);
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float *penalty = (float *) PG_GETARG_POINTER(2);
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GISTTYPE *origval = (GISTTYPE*)DatumGetPointer( origentry->key );
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GISTTYPE *newval = (GISTTYPE*)DatumGetPointer( newentry->key );
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int4 unionsize = 0;
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BITVECP orig = GETSIGN(origval);
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if ( ISALLTRUE(origval) ) {
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*penalty = 0.0;
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PG_RETURN_POINTER( penalty );
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}
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if ( ISARRKEY(newval) ) {
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int4 *ptr=GETARR(newval), n=ARRNELEM(newval);
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while( n-- ) {
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if ( GETBIT(orig, HASHVAL( *ptr ) ) == 0 )
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unionsize++;
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ptr++;
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}
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*penalty = (float)unionsize;
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} else {
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if ( ISALLTRUE(newval) ) {
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*penalty = (float) (SIGLENBIT - sizebitvec( orig ) );
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} else {
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char valtmp;
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BITVECP nval = GETSIGN(newval);
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int4 i;
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LOOPBYTE(
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valtmp = nval[i] | orig[i];
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unionsize += SUMBIT(valtmp) - SUMBIT(orig[i]);
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);
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*penalty = (float)unionsize;
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}
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}
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PG_RETURN_POINTER( penalty );
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}
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static void
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makesign( BITVECP sign, GISTTYPE *a) {
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int4 k,len = ARRNELEM( a );
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int4 *ptr = GETARR( a );
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MemSet( (void*)sign, 0, sizeof(BITVEC) );
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for(k=0;k<len;k++)
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HASH( sign, ptr[k] );
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}
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typedef struct {
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bool allistrue;
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BITVEC sign;
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} CACHESIGN;
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static void
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fillcache( CACHESIGN *item, GISTTYPE *key ) {
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item->allistrue = false;
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if ( ISARRKEY( key ) ) {
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makesign(item->sign, key);
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} else if ( ISALLTRUE(key) ) {
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item->allistrue = true;
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} else {
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memcpy( (void*)item->sign, (void*)GETSIGN(key), sizeof(BITVEC));
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}
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}
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#define WISH_F(a,b,c) (double)( -(double)(((a)-(b))*((a)-(b))*((a)-(b)))*(c) )
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typedef struct {
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OffsetNumber pos;
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int4 cost;
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} SPLITCOST;
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static int
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comparecost( const void *a, const void *b ) {
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if ( ((SPLITCOST*)a)->cost == ((SPLITCOST*)b)->cost )
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return 0;
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else
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return ( ((SPLITCOST*)a)->cost > ((SPLITCOST*)b)->cost ) ? 1 : -1;
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}
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Datum
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gtxtidx_picksplit(PG_FUNCTION_ARGS) {
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bytea *entryvec = (bytea *)PG_GETARG_POINTER(0);
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GIST_SPLITVEC *v = (GIST_SPLITVEC *)PG_GETARG_POINTER(1);
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OffsetNumber k,j;
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GISTTYPE *datum_l, *datum_r;
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BITVEC union_l, union_r;
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bool firsttime = true;
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int4 size_alpha,size_beta,sizeu,sizei;
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int4 size_waste, waste = 0.0;
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int4 size_l, size_r;
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int4 nbytes;
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OffsetNumber seed_1=0, seed_2=0;
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OffsetNumber *left, *right;
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OffsetNumber maxoff;
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BITVECP ptra, ptrb, ptrc;
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int i;
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CACHESIGN *cache;
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char valtmp;
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SPLITCOST *costvector;
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maxoff = ((VARSIZE(entryvec) - VARHDRSZ) / sizeof(GISTENTRY)) - 2;
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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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cache = (CACHESIGN*)palloc(sizeof(CACHESIGN)*(maxoff+2));
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fillcache( &cache[FirstOffsetNumber], GETENTRY(entryvec,FirstOffsetNumber) );
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for (k = FirstOffsetNumber; k < maxoff; k = OffsetNumberNext(k)) {
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for (j = OffsetNumberNext(k); j <= maxoff; j = OffsetNumberNext(j)) {
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if ( k==FirstOffsetNumber )
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fillcache( &cache[j], GETENTRY(entryvec,j) );
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if ( cache[k].allistrue || cache[j].allistrue ) {
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sizeu = SIGLENBIT;
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if ( cache[k].allistrue && cache[j].allistrue )
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sizei = SIGLENBIT;
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else
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sizei = ( cache[k].allistrue ) ?
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sizebitvec( cache[j].sign ) : sizebitvec( cache[k].sign );
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} else {
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sizeu = sizei = 0;
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ptra = cache[j].sign;
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ptrb = cache[k].sign;
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/* critical section for bench !!! */
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#define COUNT(pos) do { \
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if ( GETBITBYTE(*(char*)ptra,pos) ) { \
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sizeu++; \
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if ( GETBITBYTE(*(char*)ptrb, pos) ) \
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sizei++; \
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} else if ( GETBITBYTE(*(char*)ptrb, pos) ) \
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sizeu++; \
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} while(0)
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LOOPBYTE(
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COUNT(0);
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COUNT(1);
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COUNT(2);
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COUNT(3);
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COUNT(4);
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COUNT(5);
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COUNT(6);
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COUNT(7);
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ptra = (BITVECP) ( ((char*)ptra) + 1 );
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ptrb = (BITVECP) ( ((char*)ptrb) + 1 );
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);
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}
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size_waste = sizeu - sizei;
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if (size_waste > waste || firsttime) {
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waste = size_waste;
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seed_1 = k;
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seed_2 = j;
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firsttime = false;
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}
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}
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}
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left = v->spl_left;
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v->spl_nleft = 0;
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right = v->spl_right;
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v->spl_nright = 0;
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/* form initial .. */
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if ( cache[seed_1].allistrue ) {
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datum_l = (GISTTYPE*)palloc( CALCGTSIZE( SIGNKEY|ALLISTRUE, 0 ) );
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datum_l->len = CALCGTSIZE( SIGNKEY|ALLISTRUE, 0 ); datum_l->flag = SIGNKEY|ALLISTRUE;
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size_l = SIGLENBIT;
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} else {
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datum_l = (GISTTYPE*)palloc( CALCGTSIZE( SIGNKEY, 0 ) );
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|
datum_l->len = CALCGTSIZE( SIGNKEY, 0 ); datum_l->flag = SIGNKEY;
|
|
memcpy((void*)GETSIGN(datum_l), (void*)cache[seed_1].sign, sizeof(BITVEC));
|
|
size_l = sizebitvec( GETSIGN(datum_l) );
|
|
}
|
|
if ( cache[seed_2].allistrue ) {
|
|
datum_r = (GISTTYPE*)palloc( CALCGTSIZE( SIGNKEY|ALLISTRUE, 0 ) );
|
|
datum_r->len = CALCGTSIZE( SIGNKEY|ALLISTRUE, 0 ); datum_r->flag = SIGNKEY|ALLISTRUE;
|
|
size_r = SIGLENBIT;
|
|
} else {
|
|
datum_r = (GISTTYPE*)palloc( CALCGTSIZE( SIGNKEY, 0 ) );
|
|
datum_r->len = CALCGTSIZE( SIGNKEY, 0 ); datum_r->flag = SIGNKEY;
|
|
memcpy((void*)GETSIGN(datum_r), (void*)cache[seed_2].sign, sizeof(BITVEC));
|
|
size_r = sizebitvec( GETSIGN(datum_r) );
|
|
}
|
|
|
|
maxoff = OffsetNumberNext(maxoff);
|
|
fillcache( &cache[maxoff], GETENTRY(entryvec,maxoff) );
|
|
/* sort before ... */
|
|
costvector=(SPLITCOST*)palloc( sizeof(SPLITCOST)*maxoff );
|
|
for (j = FirstOffsetNumber; j <= maxoff; j = OffsetNumberNext(j)) {
|
|
costvector[j-1].pos = j;
|
|
if ( cache[j].allistrue ) {
|
|
size_alpha = SIGLENBIT - size_l;
|
|
size_beta = SIGLENBIT - size_r;
|
|
} else {
|
|
ptra = cache[seed_1].sign;
|
|
ptrb = cache[seed_2].sign;
|
|
ptrc = cache[j].sign;
|
|
size_beta = size_alpha = 0;
|
|
if ( cache[seed_1].allistrue ) {
|
|
if ( ! cache[seed_2].allistrue ) {
|
|
LOOPBIT(
|
|
if ( GETBIT(ptrc,i) && ! GETBIT(ptrb,i) )
|
|
size_beta++;
|
|
);
|
|
}
|
|
} else if ( cache[seed_2].allistrue ) {
|
|
if ( ! cache[seed_1].allistrue ) {
|
|
LOOPBIT(
|
|
if ( GETBIT(ptrc,i) && ! GETBIT(ptra,i) )
|
|
size_alpha++;
|
|
);
|
|
}
|
|
} else {
|
|
LOOPBIT(
|
|
if ( GETBIT(ptrc,i) && ! GETBIT(ptra,i) )
|
|
size_alpha++;
|
|
if ( GETBIT(ptrc,i) && ! GETBIT(ptrb,i) )
|
|
size_beta++;
|
|
);
|
|
}
|
|
|
|
}
|
|
costvector[j-1].cost = abs( size_alpha - size_beta );
|
|
}
|
|
qsort( (void*)costvector, maxoff, sizeof(SPLITCOST), comparecost );
|
|
|
|
for (k = 0; k < maxoff; k++) {
|
|
j = costvector[k].pos;
|
|
if ( j == seed_1 ) {
|
|
*left++ = j;
|
|
v->spl_nleft++;
|
|
continue;
|
|
} else if ( j == seed_2 ) {
|
|
*right++ = j;
|
|
v->spl_nright++;
|
|
continue;
|
|
}
|
|
|
|
if ( ISALLTRUE( datum_l ) || cache[j].allistrue ) {
|
|
size_alpha = SIGLENBIT;
|
|
} else {
|
|
ptra = cache[j].sign;
|
|
ptrb = GETSIGN(datum_l);
|
|
size_alpha = 0;
|
|
LOOPBYTE(
|
|
valtmp = union_l[i] = ptra[i] | ptrb[i];
|
|
size_alpha += SUMBIT( valtmp );
|
|
);
|
|
}
|
|
if ( ISALLTRUE( datum_r ) || cache[j].allistrue ) {
|
|
size_beta = SIGLENBIT;
|
|
} else {
|
|
ptra = cache[j].sign;
|
|
ptrb = GETSIGN(datum_r);
|
|
size_beta = 0;
|
|
LOOPBYTE(
|
|
valtmp = union_r[i] = ptra[i] | ptrb[i];
|
|
size_beta += SUMBIT( valtmp );
|
|
);
|
|
}
|
|
|
|
if (size_alpha - size_l < size_beta - size_r + WISH_F(v->spl_nleft, v->spl_nright, 0.1)) {
|
|
if ( ! ISALLTRUE( datum_l ) ) {
|
|
if ( size_alpha == SIGLENBIT ) {
|
|
if ( size_alpha != size_l )
|
|
MemSet( (void*)GETSIGN(datum_l),0xff, sizeof(BITVEC));
|
|
} else
|
|
memcpy( (void*)GETSIGN(datum_l), (void*)union_l, sizeof(BITVEC) );
|
|
}
|
|
size_l = size_alpha;
|
|
*left++ = j;
|
|
v->spl_nleft++;
|
|
} else {
|
|
if ( ! ISALLTRUE( datum_r ) ) {
|
|
if ( size_beta == SIGLENBIT ) {
|
|
if ( size_beta != size_r )
|
|
MemSet( (void*)GETSIGN(datum_r),0xff, sizeof(BITVEC));
|
|
} else
|
|
memcpy( (void*)GETSIGN(datum_r), (void*)union_r, sizeof(BITVEC) );
|
|
}
|
|
size_r = size_beta;
|
|
*right++ = j;
|
|
v->spl_nright++;
|
|
}
|
|
}
|
|
|
|
*right = *left = FirstOffsetNumber;
|
|
pfree(costvector);
|
|
pfree(cache);
|
|
v->spl_ldatum = PointerGetDatum(datum_l);
|
|
v->spl_rdatum = PointerGetDatum(datum_r);
|
|
|
|
PG_RETURN_POINTER( v );
|
|
}
|
|
|
|
|