message: Add check for column count in COPY INTO
diff: @@ -36,6 +36,9 @@ void PhysicalCopy::GetChunk(DataChunk &result_chunk,
  insert_chunk.Reset();
  }
  std::vector<string> csv_line = StringUtil::Split(value, delimiter);
  + if (csv_line.size() != insert_chunk.column_count) {
  + throw Exception("COPY TO column mismatch! Expected %zu columns, got %zu.", insert_chunk.column_count, csv_line.size());
  + }
  for (size_t i = 0; i < csv_line.size(); ++i) {
  insert_chunk.data[i]->count++;
  insert_chunk.data[i]->SetValue(count_line, csv_line[i]);
  