From 2906714d10f387b044d0c3511d0f526f1632c214 Mon Sep 17 00:00:00 2001
From: kakachen <chenqi@selectdb.com>
Date: Fri, 18 Apr 2025 18:11:46 +0800
Subject: [PATCH] [Fix] Clear streams map when all row groups are filtered by
 row group stats, despite stripe stats remaining unfiltered.

---
 c++/src/Reader.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/c++/src/Reader.cc b/c++/src/Reader.cc
index a44398b5d5d..44f2be21e19 100644
--- a/c++/src/Reader.cc
+++ b/c++/src/Reader.cc
@@ -1165,7 +1165,6 @@ namespace orc {
     reader.reset();  // ColumnReaders use lots of memory; free old memory first
     rowIndexes.clear();
     bloomFilterIndex.clear();
-    streams.clear();
     followRowInStripe = 0;
 
     // evaluate file statistics if it exists
@@ -1218,6 +1217,7 @@ namespace orc {
           currentStripeInfo.datalength(), currentStripeInfo.footerlength(),
           currentStripeInfo.numberofrows(), contents->stream.get(), *contents->pool,
           contents->compression, contents->blockSize, contents->readerMetrics));
+      streams.clear();
       contents->stream->beforeReadStripe(std::move(currentStripeInformation), selectedColumns,
                                          streams);