From d3bb2ec6400c9c39c61921c7f475bbb33021b4dd Mon Sep 17 00:00:00 2001
From: hyc520 <huyicheng1@xfusion.com>
Date: Wed, 17 Aug 2022 17:15:02 +0800
Subject: [PATCH] improve the performance of numeric Natural logarithm.

---
 src/common/backend/utils/adt/numeric.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/common/backend/utils/adt/numeric.cpp b/src/common/backend/utils/adt/numeric.cpp
index 2f6415c4d..56232c82e 100644
--- a/src/common/backend/utils/adt/numeric.cpp
+++ b/src/common/backend/utils/adt/numeric.cpp
@@ -6139,10 +6139,9 @@ static void ln_var(NumericVar* arg, NumericVar* result, int rscale)
     init_var(&xx);
     init_var(&ni);
     init_var(&elem);
-    init_var(&fact);
 
     init_var_from_var(arg, &x);
-    init_var_from_var(&const_two, &fact);
+    init_ro_var_from_var(&const_two, &fact);
 
     /*
      * Reduce input into range 0.9 < x < 1.1 with repeated sqrt() operations.