User-Defined Filter functions allow you to manipulate data obtained from a source in various ways.
For example, a filter could:
- Process a compressed file in a compression format not natively supported by Vertica.
- Take UTF-16-encoded data and transcode it to UTF-8 encoding.
- Perform search-and-replace operations on data before it is loaded into Vertica.
You can also process data through multiple filters before it is loaded into Vertica. For instance, you could unzip a file compressed with GZip, convert the content from UTF-16 to UTF-8, and finally search and replace certain text strings.
If you implement a
UDFilter, you must also implement a corresponding
See UDFilter Class and FilterFactory Class for API details.