Full Text Searching (FTS) in PostgreSQL revolutionizes document retrieval. FTS identifies relevant documents based on queries and ranks them by relevance.
Key Limitations
- No linguistic support for derived words, leading to missed matches.
- No effective ranking, making it sluggish for numerous matches.
- Slower performance due to lacking index support.
FTS Solution
- Preprocesses documents for indexing efficiency.
- Parses documents into tokens, converts to normalized lexemes.
- Employs dictionaries for stop words, synonyms, and mapping.
- Utilizes
tsvector
for preprocessed documents andtsquery
for queries. - Core
@@
operator for FTS matches.
Advantages
- Efficiently handles diverse queries and linguistic variations.
- Enables ranking and relevance-based ordering.
- Accelerates searches through indexing.
- Customizable configurations for parsing and normalization.
In PostgreSQL, FTS empowers accurate, efficient, and dynamic text searches, enhancing database capabilities.
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