What's the Most Efficient Way to Convert a ResultSet to JSON?

Most Efficient Conversion of ResultSet to JSON?

The conventional approach to converting a ResultSet to JSON involves utilizing the JSONArray and JSONObject classes. However, this method requires extensive type-checking to cater to different data types in the ResultSet.

Is there a faster way?

A simplified alternative exists that bypasses the need for explicit type-checking:

JSONArray json = new JSONArray();
ResultSetMetaData rsmd = rs.getMetaData();
while(rs.next()) {
  int numColumns = rsmd.getColumnCount();
  JSONObject obj = new JSONObject();
  for (int i=1; i<=numColumns; i++) {
    String column_name = rsmd.getColumnName(i);
    obj.put(column_name, rs.getObject(column_name));
  }
  json.put(obj);
}
return json;

This approach eliminates the need for cumbersome type conversions, resulting in potential performance improvements.

Is there a way that uses less memory?

The presented approach does not require additional memory compared to the original method. It simply streamlines the conversion process without introducing additional memory overhead.

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