--- title: Literal --- The literal tokenizer applies no tokenization to the text, preserving it as-is. It is the default for `uuid` fields (since exact UUID matching is a common use case), and is useful for doing exact string matching over text fields. ```sql CREATE INDEX search_idx ON mock_items USING bm25 (id, (description::pdb.literal)) WITH (key_field='id'); ``` To get a feel for this tokenizer, run the following command and replace the text with your own: ```sql SELECT 'Tokenize me!'::pdb.literal::text[]; ``` ```ini Expected Response text ------------------ {"Tokenize me!"} (1 row) ``` Because the literal tokenizer preserves the source text exactly, [token filters](/v2/token_filters/overview) cannot be configured for this tokenizer.