January 2019
Beginner
556 pages
14h 19m
English
Content preview from Learning PostgreSQL 11 - Third Edition
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A PostgreSQL full-text search
PostgreSQL provides a full-text search capability, which is used to overcome SQL pattern-matching operators, including LIKE and ILIKE, boosting the performance of the text search. For example, even though an index on text using the text_pattern_op class is supported, this index can't be used to match a non-anchored text search.
Another issue with the traditional LIKE and ILIKE operators is the ranking based on similarity and natural language linguistic support. The LIKE and ILIKE operators always evaluate a Boolean value: either as TRUE or as FALSE.
In addition to ranking and non-anchored text-search support, PostgreSQL's full-text search provides many other features. The full-text search supports dictionaries, ...
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