Conversion of unsupported formats and data types

By creating the text index using a user-defined function (UDF), you can convert an unsupported format to a supported format that can be processed during indexing by filtering the unsupported characters.

You can also use this approach for indexing documents that are stored in external unsupported data stores. In this case, where a column contains document references, you can use a UDF to return the content of documents that have the relevant document reference.