chore: Miscellaneous minor improvements (alibaba#63)

Author: Eyizoha

include/paimon/read_context.h

@@ -137,6 +137,9 @@ class PAIMON_EXPORT ReadContextBuilder {
 
     ~ReadContextBuilder();
 
+    ReadContextBuilder(ReadContextBuilder&&) noexcept;
+    ReadContextBuilder& operator=(ReadContextBuilder&&) noexcept;
+
     /// Set the schema fields to read from the table.
     ///
     /// If not set, all fields from the table schema will be read. This is useful for

src/paimon/core/operation/read_context.cpp

@@ -105,6 +105,9 @@ ReadContextBuilder::ReadContextBuilder(const std::string& path)
 
 ReadContextBuilder::~ReadContextBuilder() = default;
 
+ReadContextBuilder::ReadContextBuilder(ReadContextBuilder&&) noexcept = default;
+ReadContextBuilder& ReadContextBuilder::operator=(ReadContextBuilder&&) noexcept = default;
+
 ReadContextBuilder& ReadContextBuilder::AddOption(const std::string& key,
                                                   const std::string& value) {
     impl_->options_[key] = value;

src/paimon/format/avro/avro_input_stream_impl.cpp

@@ -99,7 +99,7 @@ void AvroInputStreamImpl::seek(int64_t position) {
 }
 
 bool AvroInputStreamImpl::fill() {
-    if (static_cast<uint64_t>(total_read_len_) > total_length_) {
+    if (static_cast<uint64_t>(total_read_len_) >= total_length_) {
         // eof
         return false;
     }