diff options
Diffstat (limited to 'src/backend/optimizer/path/costsize.c')
| -rw-r--r-- | src/backend/optimizer/path/costsize.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/src/backend/optimizer/path/costsize.c b/src/backend/optimizer/path/costsize.c index 875c611ab50..d3f04eea4b1 100644 --- a/src/backend/optimizer/path/costsize.c +++ b/src/backend/optimizer/path/costsize.c @@ -989,12 +989,17 @@ cost_subqueryscan(Path *path, PlannerInfo *root, /* * cost_functionscan * Determines and returns the cost of scanning a function RTE. + * + * 'baserel' is the relation to be scanned + * 'param_info' is the ParamPathInfo if this is a parameterized path, else NULL */ void -cost_functionscan(Path *path, PlannerInfo *root, RelOptInfo *baserel) +cost_functionscan(Path *path, PlannerInfo *root, + RelOptInfo *baserel, ParamPathInfo *param_info) { Cost startup_cost = 0; Cost run_cost = 0; + QualCost qpqual_cost; Cost cpu_per_tuple; RangeTblEntry *rte; QualCost exprcost; @@ -1004,8 +1009,11 @@ cost_functionscan(Path *path, PlannerInfo *root, RelOptInfo *baserel) rte = planner_rt_fetch(baserel->relid, root); Assert(rte->rtekind == RTE_FUNCTION); - /* functionscans are never parameterized */ - path->rows = baserel->rows; + /* Mark the path with the correct row estimate */ + if (param_info) + path->rows = param_info->ppi_rows; + else + path->rows = baserel->rows; /* * Estimate costs of executing the function expression. @@ -1025,8 +1033,10 @@ cost_functionscan(Path *path, PlannerInfo *root, RelOptInfo *baserel) startup_cost += exprcost.startup + exprcost.per_tuple; /* Add scanning CPU costs */ - startup_cost += baserel->baserestrictcost.startup; - cpu_per_tuple = cpu_tuple_cost + baserel->baserestrictcost.per_tuple; + get_restriction_qual_cost(root, baserel, param_info, &qpqual_cost); + + startup_cost += qpqual_cost.startup; + cpu_per_tuple = cpu_tuple_cost + qpqual_cost.per_tuple; run_cost += cpu_per_tuple * baserel->tuples; path->startup_cost = startup_cost; |