Struct Identifier 

pub struct Identifier(/* private fields */);

A single Postgres identifier (e.g., a table name).

Postgres identifier rules:

• Length: 1..=63 bytes (NAMEDATALEN).
• Unquoted: starts with [A-Za-z_] followed by [A-Za-z0-9_$]*.
• Quoted: any UTF-8 except " (we accept any non-empty UTF-8 here; pg_query will reject anything postgres can’t actually accept at parse time).

We store identifiers in their case-folded canonical form for unquoted inputs (Postgres lowercases unquoted identifiers) and in their original form for quoted inputs. The constructor distinguishes the two cases via Identifier::from_unquoted vs Identifier::from_quoted.

Implementations

impl Identifier

pub fn from_unquoted(s: &str) -> Result<Self, IdentifierError>

Construct from an unquoted identifier source — lowercases per Postgres rules.

pub fn from_quoted(s: &str) -> Result<Self, IdentifierError>

Construct from a quoted identifier — preserves case.

pub fn as_str(&self) -> &str

Returns the inner canonical string.

pub fn render_sql(&self) -> String

Renders this identifier as it would appear in SQL — quoted iff necessary.

Trait Implementations

impl Clone for Identifier

fn clone(&self) -> Identifier

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Identifier

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Identifier

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Identifier

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Identifier

impl FromStr for Identifier

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses as an unquoted identifier.

type Err = IdentifierError

The associated error which can be returned from parsing.

impl Hash for Identifier

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Identifier

fn cmp(&self, other: &Identifier) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Identifier

fn eq(&self, other: &Identifier) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Identifier

fn partial_cmp(&self, other: &Identifier) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for Identifier

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Identifier