Safe Haskell	None
Language	Haskell2010

PostgresqlTypes.Tsvector

Contents

Accessors
Constructors
Weight

Synopsis

data Tsvector
toLexemeList :: Tsvector -> [(Text, [(Word16, Weight)])]
refineFromLexemeList :: [(Text, [(Word16, Weight)])] -> Maybe Tsvector
normalizeFromLexemeList :: [(Text, [(Word16, Weight)])] -> Tsvector
data Weight
- = AWeight
- | BWeight
- | CWeight
- | DWeight

Documentation

data Tsvector Source #

PostgreSQL tsvector type. Full-text search document representation.

A tsvector is a sorted list of distinct lexemes with optional position and weight information. Lexemes are sorted alphabetically and deduplicated, matching PostgreSQL's canonical representation.

PostgreSQL docs.

Instances

Instances details

Arbitrary Tsvector Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods arbitrary :: Gen Tsvector # shrink :: Tsvector -> [Tsvector] #
Eq Tsvector Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods (==) :: Tsvector -> Tsvector -> Bool # (/=) :: Tsvector -> Tsvector -> Bool #
Ord Tsvector Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods compare :: Tsvector -> Tsvector -> Ordering # (<) :: Tsvector -> Tsvector -> Bool # (<=) :: Tsvector -> Tsvector -> Bool # (>) :: Tsvector -> Tsvector -> Bool # (>=) :: Tsvector -> Tsvector -> Bool # max :: Tsvector -> Tsvector -> Tsvector # min :: Tsvector -> Tsvector -> Tsvector #
IsString Tsvector Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods fromString :: String -> Tsvector #
Read Tsvector Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods readsPrec :: Int -> ReadS Tsvector # readList :: ReadS [Tsvector] # readPrec :: ReadPrec Tsvector # readListPrec :: ReadPrec [Tsvector] #
Show Tsvector Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods showsPrec :: Int -> Tsvector -> ShowS # show :: Tsvector -> String # showList :: [Tsvector] -> ShowS #
Hashable Tsvector Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods hashWithSalt :: Int -> Tsvector -> Int # hash :: Tsvector -> Int #
IsScalar Tsvector Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods schemaName :: Tagged Tsvector (Maybe Text) # typeName :: Tagged Tsvector Text # baseOid :: Tagged Tsvector (Maybe Word32) # arrayOid :: Tagged Tsvector (Maybe Word32) # typeParams :: Tagged Tsvector [Text] # typeSignature :: Tagged Tsvector Text # binaryEncoder :: Tsvector -> Write # binaryDecoder :: Variable (Either DecodingError Tsvector) # textualEncoder :: Tsvector -> TextBuilder # textualDecoder :: Parser Tsvector #

Accessors

toLexemeList :: Tsvector -> [(Text, [(Word16, Weight)])] Source #

Extract the tsvector as a list of (lexeme, positions) pairs. Lexemes are in sorted order. Each position is a (position, weight) pair where position is 1-16383.

Constructors

refineFromLexemeList :: [(Text, [(Word16, Weight)])] -> Maybe Tsvector Source #

Construct a tsvector from a list of (lexeme, positions) pairs with validation. Returns Nothing if any lexeme is empty, contains null characters, or has positions outside the valid range 1..16383. Sorts and deduplicates lexemes to match PostgreSQL's canonical representation.

normalizeFromLexemeList :: [(Text, [(Word16, Weight)])] -> Tsvector Source #

Construct a tsvector from a list of (lexeme, positions) pairs. Strips null characters from lexemes and removes empty lexemes. Sorts and deduplicates lexemes to match PostgreSQL's canonical representation.

Weight

data Weight Source #

Weight of a tsvector lexeme position.

Constructors

AWeight
BWeight
CWeight
DWeight

Instances

Instances details

Arbitrary Weight Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods arbitrary :: Gen Weight # shrink :: Weight -> [Weight] #
Eq Weight Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods (==) :: Weight -> Weight -> Bool # (/=) :: Weight -> Weight -> Bool #
Ord Weight Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods compare :: Weight -> Weight -> Ordering # (<) :: Weight -> Weight -> Bool # (<=) :: Weight -> Weight -> Bool # (>) :: Weight -> Weight -> Bool # (>=) :: Weight -> Weight -> Bool # max :: Weight -> Weight -> Weight # min :: Weight -> Weight -> Weight #
Bounded Weight Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods minBound :: Weight # maxBound :: Weight #
Enum Weight Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods succ :: Weight -> Weight # pred :: Weight -> Weight # toEnum :: Int -> Weight # fromEnum :: Weight -> Int # enumFrom :: Weight -> [Weight] # enumFromThen :: Weight -> Weight -> [Weight] # enumFromTo :: Weight -> Weight -> [Weight] # enumFromThenTo :: Weight -> Weight -> Weight -> [Weight] #
Read Weight Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods readsPrec :: Int -> ReadS Weight # readList :: ReadS [Weight] # readPrec :: ReadPrec Weight # readListPrec :: ReadPrec [Weight] #
Show Weight Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods showsPrec :: Int -> Weight -> ShowS # show :: Weight -> String # showList :: [Weight] -> ShowS #
Hashable Weight Source #
Instance details Defined in PostgresqlTypes.Tsvector Methods hashWithSalt :: Int -> Weight -> Int # hash :: Weight -> Int #