From 4c2777d0b733220d9029f78817af8ce671e4a5ad Mon Sep 17 00:00:00 2001
From: Tom Lane
Date: Sun, 4 Sep 2011 15:41:49 -0400
Subject: Change get_variable_numdistinct's API to flag default estimates
 explicitly.

Formerly, callers tested for DEFAULT_NUM_DISTINCT, which had the problem
that a perfectly solid estimate might be mistaken for a content-free
default.
---
 src/include/utils/selfuncs.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/include/utils/selfuncs.h')

diff --git a/src/include/utils/selfuncs.h b/src/include/utils/selfuncs.h
index 4208588c2eb..32d14b60290 100644
--- a/src/include/utils/selfuncs.h
+++ b/src/include/utils/selfuncs.h
@@ -121,7 +121,8 @@ extern void get_join_variables(PlannerInfo *root, List *args,
 				   VariableStatData *vardata1,
 				   VariableStatData *vardata2,
 				   bool *join_is_reversed);
-extern double get_variable_numdistinct(VariableStatData *vardata);
+extern double get_variable_numdistinct(VariableStatData *vardata,
+									   bool *isdefault);
 extern double mcv_selectivity(VariableStatData *vardata, FmgrInfo *opproc,
 				Datum constval, bool varonleft,
 				double *sumcommonp);
-- 
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