diff options
Diffstat (limited to 'src/backend/optimizer/util/pathnode.c')
| -rw-r--r-- | src/backend/optimizer/util/pathnode.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/backend/optimizer/util/pathnode.c b/src/backend/optimizer/util/pathnode.c index faca30b322d..ea7a47bdf45 100644 --- a/src/backend/optimizer/util/pathnode.c +++ b/src/backend/optimizer/util/pathnode.c @@ -706,6 +706,26 @@ create_seqscan_path(PlannerInfo *root, RelOptInfo *rel, Relids required_outer) } /* + * create_samplescan_path + * Like seqscan but uses sampling function while scanning. + */ +Path * +create_samplescan_path(PlannerInfo *root, RelOptInfo *rel, Relids required_outer) +{ + Path *pathnode = makeNode(Path); + + pathnode->pathtype = T_SampleScan; + pathnode->parent = rel; + pathnode->param_info = get_baserel_parampathinfo(root, rel, + required_outer); + pathnode->pathkeys = NIL; /* samplescan has unordered result */ + + cost_samplescan(pathnode, root, rel); + + return pathnode; +} + +/* * create_index_path * Creates a path node for an index scan. * @@ -1778,6 +1798,8 @@ reparameterize_path(PlannerInfo *root, Path *path, case T_SubqueryScan: return create_subqueryscan_path(root, rel, path->pathkeys, required_outer); + case T_SampleScan: + return (Path *) create_samplescan_path(root, rel, required_outer); default: break; } |