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SQL Anywhere 12.0.1 » SQL Anywhere Server - SQL Usage » Query and modify data » Full text search » Advanced: External term breaker and prefilter libraries » External prefilter libraries


How to design an external prefilter library

The prefilter library must be implemented in C/C++, and must:

  • include the prefilter interface definition header file, extpfapiv1.h.

  • implement the a_text_source interface.

  • provide an entry point function that initializes and returns an instance of a_text_source (prefilter) and the label of the character set supported by the prefilter.

 Calling sequence for the prefilter
 External prefilter library workflow
 See also