Tsvector
tsvector is a PostgreSQL data type representing normalized searchable lexemes extracted from text, optionally including their positions.
Just Use Postgres!
A tsvector lexeme is a normalized term stored as an element of PostgreSQL's searchable text-vector representation.
- How it is used
- Uses normalized document terms as the stored representation for PostgreSQL full-text search, matching, ranking, and indexing.
- How deep it goes
- Explains normalization, positions, storage, weights, matching, ranking, and indexing, but does not detail internal index algorithms.
- Examples
- Demonstrates movie descriptions, generated columns, positional output, weighted title fields, ghost searches, and execution plans.
- What you can do after
- Build it from scratch by generating stored vectors, querying them with tsquery, ranking matches, and preparing them for indexing.
PostgreSQL Mistakes and How to Avoid Them
tsvector is a PostgreSQL data type representing normalized searchable text as a collection of lexemes and their positions.
- How it is used
- Deploys tsvector for PostgreSQL full-text search over document fields.
- How deep it goes
- Contrasts B-tree failures with a working GIN expression index and query plan, but does not detail tokenization internals.
- Examples
- Uses an arXiv JSON dataset, English title indexing, plainto_tsquery, EXPLAIN ANALYZE, and measured index sizes.
- What you can do after
- Apply it via PostgreSQL GIN indexes and diagnose full-text performance with EXPLAIN ANALYZE.
Read how PostgreSQL Mistakes and How to Avoid Them explains tsvector →
Related concepts
- -> operatorused by · The PostgreSQL JSON -> operator extracts a field or array element while preserving the result as JSON.
- lexemeuses · A lexeme is a normalized linguistic term produced from text for representation and matching in full-text search.
- GIN indexused by · A GIN index is a PostgreSQL generalized inverted index that maps components of composite values to rows containing them.
- to_tsvector functionproduced by · The PostgreSQL to_tsvector function converts text into a tsvector using a specified or default text-search configuration.
- GiST indexuses · A GiST index is a PostgreSQL extensible index structure that supports generalized searches over diverse data types and predicates.
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