On this page

Show all

Help Center/ GaussDB(DWS)/ SQL Syntax Reference (8.1.3.x)/ Full Text Search/ Testing and Debugging Text Search/ Testing a Dictionary

Testing a Dictionary

Updated on 2024-12-19 GMT+08:00

View PDF

The ts_lexize function facilitates dictionary testing.

ts_lexize(dict regdictionary, token text) returns text[] ts_lexize returns an array of lexemes if the input token is known to the dictionary, or an empty array if the token is known to the dictionary but it is a stop word, or NULL if it is an unknown word.

For example:

   
      SELECT ts_lexize('english_stem', 'stars');
 ts_lexize
-----------
 {star}

SELECT ts_lexize('english_stem', 'a');
 ts_lexize
-----------
 {}

NOTICE:

The ts_lexize function expects a single token, not text.

Parent topic: Testing and Debugging Text Search

Previous topic: Testing a Parser

Next topic: System Operation

Feedback

Was this page helpful?

Helpful Not helpful

Provide feedback

Thank you very much for your feedback. We will continue working to improve the documentation.

The system is busy. Please try again later.

Which of the following issues have you encountered?

Content is inconsistent with the product UI

Unclear descriptions

Lack of examples or code

Incorrect steps

Can't find what I need

Lack of best practices

Feedback (optional)

0/500

Select at least one type of issue, and enter your comments or suggestions.

Enter a maximum of 500 characters.

Submit Cancel

Feedback

Feedback

Feedback

0/500

Selected Content

Submit selected content with the feedback