BaseIndex

Defined in: packages/db/src/indexes/base-index.ts:119

Base abstract class that all index types extend

Extended by#

• BasicIndex
• BTreeIndex

Type Parameters#

TKey#

TKey extends string | number = string | number

Implements#

• IndexInterface<TKey>

Constructors#

Constructor#

new BaseIndex<TKey>(
   id, 
   expression, 
   name?, 
options?): BaseIndex<TKey>;

Defined in: packages/db/src/indexes/base-index.ts:140

Parameters#

id#

number

expression#

BasicExpression

name?#

string

options?#

any

Returns#

BaseIndex<TKey>

Properties#

compareFn()#

protected readonly compareFn: (a, b) => number;

Defined in: packages/db/src/indexes/base-index.ts:131

Orders indexed values. Every result is checked, because a custom comparator or custom collation may be supplied by the user.

Parameters#

a#

any

b#

any

Returns#

number

compareOptions#

protected readonly compareOptions: CompareOptions;

Defined in: packages/db/src/indexes/base-index.ts:126

expression#

readonly expression: BasicExpression;

Defined in: packages/db/src/indexes/base-index.ts:124

hasCustomComparator#

protected readonly hasCustomComparator: boolean;

Defined in: packages/db/src/indexes/base-index.ts:137

A user-supplied comparator's ordering may not match the WHERE evaluator's relational operators.

id#

readonly id: number;

Defined in: packages/db/src/indexes/base-index.ts:122

name?#

readonly optional name: string;

Defined in: packages/db/src/indexes/base-index.ts:123

supportedOperations#

abstract readonly supportedOperations: Set<"eq" | "gt" | "gte" | "lt" | "lte" | "in" | "like" | "ilike">;

Defined in: packages/db/src/indexes/base-index.ts:125

Accessors#

keyCount#

Get Signature#

get abstract keyCount(): number;

Defined in: packages/db/src/indexes/base-index.ts:182

Returns#

number

Implementation of#

IndexInterface.keyCount

supportsRangeOptimization#

Get Signature#

get supportsRangeOptimization(): boolean;

Defined in: packages/db/src/indexes/base-index.ts:206

Whether range lookups (gt/gte/lt/lte) on this index can be trusted to return every matching key. Range traversal relies on the index ordering, so it is unsafe when the index uses a custom comparator, whose order may not match the WHERE evaluator's relational operators. Callers must fall back to a full scan when this is false.

Returns#

boolean

Implementation of#

IndexInterface.supportsRangeOptimization

Methods#

add()#

abstract add(key, item): void;

Defined in: packages/db/src/indexes/base-index.ts:158

Parameters#

key#

TKey

item#

any

Returns#

void

Implementation of#

IndexInterface.add

addRangeValue()#

protected addRangeValue(value): void;

Defined in: packages/db/src/indexes/base-index.ts:210

Parameters#

value#

unknown

Returns#

void

build()#

abstract build(entries): void;

Defined in: packages/db/src/indexes/base-index.ts:161

Parameters#

entries#

Iterable<[TKey, any]>

Returns#

void

Implementation of#

IndexInterface.build

canOptimizeRangeFor()#

canOptimizeRangeFor(value): boolean;

Defined in: packages/db/src/indexes/base-index.ts:232

Whether the live values in this index share the predicate operand's relational domain. Mixed domains can sort differently in the index and WHERE evaluator, which can make a range lookup omit matching rows.

Parameters#

value#

unknown

Returns#

boolean

Implementation of#

IndexInterface.canOptimizeRangeFor

clear()#

abstract clear(): void;

Defined in: packages/db/src/indexes/base-index.ts:162

Returns#

void

Implementation of#

IndexInterface.clear

clearRangeValues()#

protected clearRangeValues(): void;

Defined in: packages/db/src/indexes/base-index.ts:228

Returns#

void

equalityLookup()#

abstract equalityLookup(value): Set<TKey>;

Defined in: packages/db/src/indexes/base-index.ts:183

Parameters#

value#

any

Returns#

Set<TKey>

Implementation of#

IndexInterface.equalityLookup

evaluateAddedValue()#

protected evaluateAddedValue(key, item): any;

Defined in: packages/db/src/indexes/base-index.ts:307

The indexed value of a row being added. A throwing expression fails the write.

Parameters#

key#

TKey

item#

any

Returns#

any

evaluateIndexExpression()#

protected evaluateIndexExpression(item): any;

Defined in: packages/db/src/indexes/base-index.ts:300

Parameters#

item#

any

Returns#

any

inArrayLookup()#

abstract inArrayLookup(values): Set<TKey>;

Defined in: packages/db/src/indexes/base-index.ts:184

Parameters#

values#

any[]

Returns#

Set<TKey>

Implementation of#

IndexInterface.inArrayLookup

initialize()#

abstract protected initialize(options?): void;

Defined in: packages/db/src/indexes/base-index.ts:298

Parameters#

options?#

any

Returns#

void

lookup()#

abstract lookup(operation, value): Set<TKey>;

Defined in: packages/db/src/indexes/base-index.ts:163

Parameters#

operation#

"eq" | "gt" | "gte" | "lt" | "lte" | "in" | "like" | "ilike"

value#

any

Returns#

Set<TKey>

Implementation of#

IndexInterface.lookup

matchesCompareOptions()#

matchesCompareOptions(compareOptions): boolean;

Defined in: packages/db/src/indexes/base-index.ts:254

Checks if the compare options match the index's compare options. The direction is ignored because the index can be reversed if the direction is different.

Parameters#

compareOptions#

CompareOptions

Returns#

boolean

Implementation of#

IndexInterface.matchesCompareOptions

matchesDirection()#

matchesDirection(direction): boolean;

Defined in: packages/db/src/indexes/base-index.ts:294

Checks if the index matches the provided direction.

Parameters#

direction#

OrderByDirection

Returns#

boolean

Implementation of#

IndexInterface.matchesDirection

matchesField()#

matchesField(fieldPath): boolean;

Defined in: packages/db/src/indexes/base-index.ts:242

Parameters#

fieldPath#

string[]

Returns#

boolean

Implementation of#

IndexInterface.matchesField

rangeQuery()#

abstract rangeQuery(options): Set<TKey>;

Defined in: packages/db/src/indexes/base-index.ts:185

Parameters#

options#

BTreeRangeQueryOptions

Returns#

Set<TKey>

Implementation of#

IndexInterface.rangeQuery

rangeQueryReversed()#

rangeQueryReversed(options): Set<TKey>;

Defined in: packages/db/src/indexes/base-index.ts:188

Parameters#

options#

BTreeRangeQueryOptions = {}

Returns#

Set<TKey>

Implementation of#

IndexInterface.rangeQueryReversed

remove()#

abstract remove(key, item): void;

Defined in: packages/db/src/indexes/base-index.ts:159

Parameters#

key#

TKey

item#

any

Returns#

void

Implementation of#

IndexInterface.remove

removeRangeValue()#

protected removeRangeValue(value): void;

Defined in: packages/db/src/indexes/base-index.ts:219

Parameters#

value#

unknown

Returns#

void

supports()#

supports(operation): boolean;

Defined in: packages/db/src/indexes/base-index.ts:202

Parameters#

operation#

"eq" | "gt" | "gte" | "lt" | "lte" | "in" | "like" | "ilike"

Returns#

boolean

Implementation of#

IndexInterface.supports

take()#

abstract take(
   n, 
   from, 
   filterFn?): TKey[];

Defined in: packages/db/src/indexes/base-index.ts:164

Parameters#

n#

number

from#

unknown

filterFn?#

(key) => boolean

Returns#

TKey[]

Implementation of#

IndexInterface.take

takeFromStart()#

abstract takeFromStart(n, filterFn?): TKey[];

Defined in: packages/db/src/indexes/base-index.ts:169

Parameters#

n#

number

filterFn?#

(key) => boolean

Returns#

TKey[]

Implementation of#

IndexInterface.takeFromStart

takeReversed()#

abstract takeReversed(
   n, 
   from, 
   filterFn?): TKey[];

Defined in: packages/db/src/indexes/base-index.ts:173

Parameters#

n#

number

from#

unknown

filterFn?#

(key) => boolean

Returns#

TKey[]

Implementation of#

IndexInterface.takeReversed

takeReversedFromEnd()#

abstract takeReversedFromEnd(n, filterFn?): TKey[];

Defined in: packages/db/src/indexes/base-index.ts:178

Parameters#

n#

number

filterFn?#

(key) => boolean

Returns#

TKey[]

Implementation of#

IndexInterface.takeReversedFromEnd

update()#

abstract update(
   key, 
   oldItem, 
   newItem): void;

Defined in: packages/db/src/indexes/base-index.ts:160

Parameters#

key#

TKey

oldItem#

any

newItem#

any

Returns#

void

Implementation of#

IndexInterface.update