Merge pull request #52621 from valbok/readbuffer

MaterializedMySQL: Fix the infinite loop in ReadBuffer::read
ClickHouse · Aug 7, 2023 · b1f0cb8 · b1f0cb8
2 parents e593efc + 3cea474
commit b1f0cb8
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/IO/MySQLPacketPayloadReadBuffer.cpp b/src/IO/MySQLPacketPayloadReadBuffer.cpp
@@ -45,6 +45,9 @@ bool MySQLPacketPayloadReadBuffer::nextImpl()
     }
 
     in.nextIfAtEnd();
+    /// Don't return a buffer when no bytes available
+    if (!in.hasPendingData())
+        return false;
     working_buffer = ReadBuffer::Buffer(in.position(), in.buffer().end());
     size_t count = std::min(in.available(), payload_length - offset);
     working_buffer.resize(count);