101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
#include "_int.h"
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PG_FUNCTION_INFO_V1(ginint4_queryextract);
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Datum ginint4_queryextract(PG_FUNCTION_ARGS);
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Datum
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ginint4_queryextract(PG_FUNCTION_ARGS) {
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uint32 *nentries = (uint32*)PG_GETARG_POINTER(1);
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StrategyNumber strategy = PG_GETARG_UINT16(2);
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Datum *res = NULL;
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*nentries = 0;
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if ( strategy == BooleanSearchStrategy ) {
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QUERYTYPE *query = (QUERYTYPE*)PG_DETOAST_DATUM_COPY(PG_GETARG_POINTER(0));
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ITEM *items = GETQUERY(query);
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int i;
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if (query->size == 0)
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PG_RETURN_POINTER(NULL);
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if ( shorterquery(items, query->size) == 0 )
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elog(ERROR,"Query requires full scan, GIN doesn't support it");
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pfree( query );
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query = (QUERYTYPE*)PG_DETOAST_DATUM(PG_GETARG_POINTER(0));
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items = GETQUERY(query);
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res = (Datum*)palloc(sizeof(Datum) * query->size);
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*nentries = 0;
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for(i=0;i<query->size;i++)
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if ( items[i].type == VAL ) {
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res[*nentries] = Int32GetDatum( items[i].val );
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(*nentries)++;
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}
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} else {
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ArrayType *query = PG_GETARG_ARRAYTYPE_P(0);
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int4 *arr;
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uint32 i;
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CHECKARRVALID(query);
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*nentries=ARRNELEMS(query);
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if ( *nentries > 0 ) {
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res = (Datum*)palloc(sizeof(Datum) * (*nentries));
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arr=ARRPTR(query);
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for(i=0;i<*nentries;i++)
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res[i] = Int32GetDatum( arr[i] );
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}
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}
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PG_RETURN_POINTER( res );
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}
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PG_FUNCTION_INFO_V1(ginint4_consistent);
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Datum ginint4_consistent(PG_FUNCTION_ARGS);
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Datum
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ginint4_consistent(PG_FUNCTION_ARGS) {
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bool *check = (bool*)PG_GETARG_POINTER(0);
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StrategyNumber strategy = PG_GETARG_UINT16(1);
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int res=FALSE;
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/* we can do not check array carefully, it's done by previous ginarrayextract call */
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switch( strategy ) {
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case RTOverlapStrategyNumber:
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case RTContainedByStrategyNumber:
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/* at least one element in check[] is true, so result = true */
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res = TRUE;
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break;
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case RTSameStrategyNumber:
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case RTContainsStrategyNumber:
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res = TRUE;
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do {
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ArrayType *query = PG_GETARG_ARRAYTYPE_P(2);
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int i, nentries=ARRNELEMS(query);
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for(i=0;i<nentries;i++)
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if ( !check[i] ) {
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res = FALSE;
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break;
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}
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} while(0);
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break;
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case BooleanSearchStrategy:
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do {
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QUERYTYPE *query = (QUERYTYPE*)PG_DETOAST_DATUM(PG_GETARG_POINTER(2));
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res = ginconsistent( query, check );
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} while(0);
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break;
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default:
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elog(ERROR, "ginint4_consistent: unknown strategy number: %d", strategy);
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}
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PG_RETURN_BOOL(res);
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}
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