Fix incorrectly reported stats kind in "can't happen" ERROR

The error message(s) were reporting the stats kind of 'f', which is not
correct as that's for the "dependencies" statistics kind.

Reported-by: Horst Reiterer
Reviewed-by: Richard Guo
Discussion: https://postgr.es/m/18375-ba99383eb9062d6a@postgresql.org
Backpatch-through: 12, where MCV extended stats were added.

diff --git a/src/backend/statistics/mcv.c b/src/backend/statistics/mcv.c
index 2b3080ffe4c0bf4bff905bae376d79879c301803..a562766e9138466b3ba8fc1c8070c0663ea283ce 100644 (file)
--- a/src/backend/statistics/mcv.c
+++ b/src/backend/statistics/mcv.c
@@ -570,7 +570,7 @@ statext_mcv_load(Oid mvoid)
    if (isnull)
        elog(ERROR,
             "requested statistics kind \"%c\" is not yet built for statistics object %u",
-            STATS_EXT_DEPENDENCIES, mvoid);
+            STATS_EXT_MCV, mvoid);
 
    result = statext_mcv_deserialize(DatumGetByteaP(mcvlist));