From 0bf8241e3cc4768f821dd80da1df23af7587462d Mon Sep 17 00:00:00 2001
From: drrtuy <drrtuy@gmail.com>
Date: Tue, 9 Sep 2025 15:47:07 +0000
Subject: [PATCH] fix(rbo,QA): add merge statistics into IN and Scalar
 subquery.

---
 dbcon/mysql/ha_in_sub.cpp     | 3 +++
 dbcon/mysql/ha_scalar_sub.cpp | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/dbcon/mysql/ha_in_sub.cpp b/dbcon/mysql/ha_in_sub.cpp
index c17834e76..ed8b17daa 100644
--- a/dbcon/mysql/ha_in_sub.cpp
+++ b/dbcon/mysql/ha_in_sub.cpp
@@ -194,6 +194,9 @@ execplan::ParseTree* InSub::transform()
     return NULL;
   }
 
+  // Insert column statistics
+  fGwip.mergeTableStatistics(gwi.tableStatisticsMap);
+
   // remove outer query tables
   CalpontSelectExecutionPlan::TableList tblist;
 
diff --git a/dbcon/mysql/ha_scalar_sub.cpp b/dbcon/mysql/ha_scalar_sub.cpp
index dfcbb1d43..ccf7e5d43 100644
--- a/dbcon/mysql/ha_scalar_sub.cpp
+++ b/dbcon/mysql/ha_scalar_sub.cpp
@@ -276,6 +276,9 @@ execplan::ParseTree* ScalarSub::buildParseTree(PredicateOperator* op)
     return NULL;
   }
 
+  // Insert column statistics
+  fGwip.mergeTableStatistics(gwi.tableStatisticsMap);
+
   fGwip.subselectList.push_back(csep);
 
   // remove outer query tables