TypeBase | /datatypes/datatype-base.ts | pg_mem@3.0.3

class TypeBase

Abstract

import { TypeBase } from "https://deno.land/x/pg_mem@3.0.3/datatypes/datatype-base.ts";

Constructors

new

TypeBase(typeId: number | null)

select a.oid, a.typname, b.typcategory from pg_catalog.pg_type a left join pg_catalog.pg_type b on b.oid = a.typelem

Type Parameters

optional

TRaw = any

Properties

private

optional

_asArray: _IType<TRaw[]>

private

optional

_asList: _IType<TRaw[]>

readonly

name: string

abstract

primary: DataType

readonly

primaryName: string

readonly

reg: Reg

readonly

type: "type"

readonly

[isType.TAG]

Methods

private

_convert(

a: IValue<TRaw>,

_to: _IType<any>,

perform: (a: Evaluator, to: _IType) => Evaluator<any> | nil,

): IValue

asArray(): _IType<TRaw[]>

asList(): _IType<TRaw[]>

canCast(to: _IType<TRaw>): boolean | nil

Can be explicitely casted to

canConvertImplicit(to: _IType<TRaw>): boolean | nil

Can constant literals be converted implicitely (without a cast... i.e. you can use both values as different values of a case expression, for instance)

cast(_a: IValue<TRaw>, _to: _IType<any>): IValue

Perform cast

convertImplicit(_a: IValue<TRaw>, _to: _IType<any>): IValue

Perform implicit conversion

optional

doBuildFrom(value: Evaluator, from: _IType): Evaluator<TRaw> | nil

Perform conversion given type to this type (inverse of doCast())

optional

doCanBuildFrom(from: _IType): boolean | nil

Can be built to from (inverse of doCanCast())

optional

doCanCast(to: _IType<TRaw>): boolean | nil

Can be casted to

optional

doCanConvertImplicit(to: _IType<TRaw>): boolean

optional

doCast(value: Evaluator<TRaw>, to: _IType<TRaw>): Evaluator<any> | nil

Perform conversion from this type to given type

doEquals(a: TRaw, b: TRaw): boolean

optional

doGetHash(value: TRaw): string | number

Compute a custom unicty hash for a non null value

doGt(a: TRaw, b: TRaw): boolean

doLt(a: TRaw, b: TRaw): boolean

optional

doPrefer(type: _IType<TRaw>): _IType | null

drop(t: _Transaction): void

equals(a: TRaw, b: TRaw): boolean | null

ge(a: TRaw, b: TRaw): boolean | null

gt(a: TRaw, b: TRaw): boolean | null

hash(value: any): string | number | null

le(a: TRaw, b: TRaw): boolean | null

lt(a: TRaw, b: TRaw): boolean | null

prefer(to: _IType<TRaw>): _IType | nil

When performing 'a+b', will be given 'b' type, this returns the prefered resulting type, or null if they are not compatible

toString(): string