Struct Type 

pub struct Type {
    pub oid: Oid,
    pub modifier: Option<i32>,
}

Hyper SQL type information (OID + optional modifier).

The modifier encodes type-specific parameters using PostgreSQL conventions:

• NUMERIC: ((precision << 16) | scale) + 4
• VARCHAR: max_length + 4
• CHAR: length + 4

The + 4 offset is a PostgreSQL convention that reserves values < 4 as “unspecified”. See SqlType::from_oid_and_modifier for the decoding logic.

Fields

oid: Oid

The type OID

modifier: Option<i32>

Type modifier (e.g., VARCHAR length, NUMERIC precision/scale)

Implementations

impl Type

pub const fn new(oid: Oid) -> Type

Creates a new Type with the given OID and no modifier.

pub const fn with_modifier(oid: Oid, modifier: i32) -> Type

Creates a new Type with the given OID and modifier.

pub fn is_variable_length(&self) -> bool

Returns true if this is a variable-length type.

pub fn fixed_size(&self) -> Option<usize>

Returns the fixed size of this type in bytes, if it has a fixed size.

impl Type

pub const fn bool() -> Type

BOOL type

pub const fn small_int() -> Type

SMALLINT type

pub const fn int() -> Type

INT type

pub const fn big_int() -> Type

BIGINT type

pub const fn float() -> Type

REAL/FLOAT4 type

pub const fn double() -> Type

DOUBLE PRECISION type

pub const fn text() -> Type

TEXT type

pub const fn byte_a() -> Type

BYTEA type

pub const fn date() -> Type

DATE type

pub const fn time() -> Type

TIME type

pub const fn timestamp() -> Type

TIMESTAMP type

pub const fn timestamp_tz() -> Type

TIMESTAMPTZ type

pub const fn interval() -> Type

INTERVAL type

pub const fn numeric() -> Type

NUMERIC type

pub const fn geography() -> Type

GEOGRAPHY type

pub const fn oid() -> Type

OID type

pub const fn json() -> Type

JSON type

pub const fn varchar(max_length: i32) -> Type

VARCHAR with max length

pub const fn char(length: i32) -> Type

CHAR with fixed length

pub const fn numeric_with_precision(precision: i32, scale: i32) -> Type

NUMERIC with precision and scale.

Panics

Panics if:

• precision is not in range 1..=38 (Numeric::MAX_PRECISION)
• scale is negative or greater than precision

Example

use hyperdb_api_core::types::Type;

let decimal = Type::numeric_with_precision(10, 2); // NUMERIC(10, 2)

Trait Implementations

impl Clone for Type

fn clone(&self) -> Type

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Type

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

Formats the value using the given formatter.

impl PartialEq for Type

fn eq(&self, other: &Type) -> 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 Copy for Type

impl Eq for Type

impl StructuralPartialEq for Type