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-rw-r--r--src/include/optimizer/cost.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/include/optimizer/cost.h b/src/include/optimizer/cost.h
index 5a4b33f2b1..e1dcd6df14 100644
--- a/src/include/optimizer/cost.h
+++ b/src/include/optimizer/cost.h
@@ -86,6 +86,10 @@ extern void cost_sort(Path *path, PlannerInfo *root,
List *pathkeys, Cost input_cost, double tuples, int width,
Cost comparison_cost, int sort_mem,
double limit_tuples);
+extern void cost_merge_append(Path *path, PlannerInfo *root,
+ List *pathkeys, int n_streams,
+ Cost input_startup_cost, Cost input_total_cost,
+ double tuples);
extern void cost_material(Path *path,
Cost input_startup_cost, Cost input_total_cost,
double tuples, int width);