Line data    Source code

       1              : /*-------------------------------------------------------------------------
       2              :  *
       3              :  * blcost.c
       4              :  *              Cost estimate function for bloom indexes.
       5              :  *
       6              :  * Copyright (c) 2016-2026, PostgreSQL Global Development Group
       7              :  *
       8              :  * IDENTIFICATION
       9              :  *        contrib/bloom/blcost.c
      10              :  *
      11              :  *-------------------------------------------------------------------------
      12              :  */
      13              : #include "postgres.h"
      14              : 
      15              : #include "bloom.h"
      16              : #include "utils/selfuncs.h"
      17              : 
      18              : /*
      19              :  * Estimate cost of bloom index scan.
      20              :  */
      21              : void
      22            0 : blcostestimate(PlannerInfo *root, IndexPath *path, double loop_count,
      23              :                            Cost *indexStartupCost, Cost *indexTotalCost,
      24              :                            Selectivity *indexSelectivity, double *indexCorrelation,
      25              :                            double *indexPages)
      26              : {
      27            0 :         IndexOptInfo *index = path->indexinfo;
      28            0 :         GenericCosts costs = {0};
      29              : 
      30              :         /* We have to visit all index tuples anyway */
      31            0 :         costs.numIndexTuples = index->tuples;
      32              : 
      33              :         /* Use generic estimate */
      34            0 :         genericcostestimate(root, path, loop_count, &costs);
      35              : 
      36            0 :         *indexStartupCost = costs.indexStartupCost;
      37            0 :         *indexTotalCost = costs.indexTotalCost;
      38            0 :         *indexSelectivity = costs.indexSelectivity;
      39            0 :         *indexCorrelation = costs.indexCorrelation;
      40            0 :         *indexPages = costs.numIndexPages;
      41            0 : }