TLA  Line data    Source code

       1                 : /*-------------------------------------------------------------------------
       2                 :  *
       3                 :  * blcost.c
       4                 :  *      Cost estimate function for bloom indexes.
       5                 :  *
       6                 :  * Copyright (c) 2016-2023, 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 "fmgr.h"
      17                 : #include "utils/selfuncs.h"
      18                 : 
      19                 : /*
      20                 :  * Estimate cost of bloom index scan.
      21                 :  */
      22                 : void
      23 CBC         406 : blcostestimate(PlannerInfo *root, IndexPath *path, double loop_count,
      24                 :                Cost *indexStartupCost, Cost *indexTotalCost,
      25                 :                Selectivity *indexSelectivity, double *indexCorrelation,
      26                 :                double *indexPages)
      27                 : {
      28             406 :     IndexOptInfo *index = path->indexinfo;
      29 GNC         406 :     GenericCosts costs = {0};
      30 ECB             : 
      31                 :     /* We have to visit all index tuples anyway */
      32 GIC         406 :     costs.numIndexTuples = index->tuples;
      33 ECB             : 
      34                 :     /* Use generic estimate */
      35 CBC         406 :     genericcostestimate(root, path, loop_count, &costs);
      36 ECB             : 
      37 CBC         406 :     *indexStartupCost = costs.indexStartupCost;
      38             406 :     *indexTotalCost = costs.indexTotalCost;
      39             406 :     *indexSelectivity = costs.indexSelectivity;
      40             406 :     *indexCorrelation = costs.indexCorrelation;
      41 GIC         406 :     *indexPages = costs.numIndexPages;
      42             406 : }