# Class: Index

Class which represent a database index. Provides attributes and methods for details of the index.

# Hierarchy

# Properties

# columnsAndExpressions

columnsAndExpressions: Array‹Column | string› = []

Defined in pg-structure/index.ts:96

List of columns and {@link Expression expressions} of index, in order their ordinal position within the index. If index does not have any columns or {@link Expression expressions} this is empty array. To get only columns use columns method.

# Optional comment

comment? : undefined | string

Inherited from DbObject.comment

Defined in pg-structure/base/db-object.ts:75

Comment of the database object defined in database including {@link DbObject#commentData comment data}.

# isExclusion

isExclusion: boolean

Defined in pg-structure/index.ts:55

If true, this index supports an exclusion constraint.

# isPrimaryKey

isPrimaryKey: boolean

Defined in pg-structure/index.ts:50

If true, this index represents the primary key of the table ({@link Index#isUnique isUnique} is always true for primary keys.)

# isUnique

isUnique: boolean

Defined in pg-structure/index.ts:45

If true, this is a unique index. Please note that all unique constraints have a unique index created by PostgreSQL automatically, but unique indexes may not have unqiue constraint.

# name

name: string

Inherited from DbObject.name

Defined in pg-structure/base/db-object.ts:42

Name of the database object.

# oid

oid: number

Defined in pg-structure/index.ts:35

Object identifier for the Schema

# partialIndexExpression

partialIndexExpression: string | undefined

Defined in pg-structure/index.ts:65

If index is a partial index, partial index expression

# table

table: Table

Defined in pg-structure/index.ts:70

Table which this index belongs to.

# Accessors

# columns

get columns(): IndexableArray‹Column, "name", never, true›

Defined in pg-structure/index.ts:86

List of columns of index, in order their ordinal position within the index. If index does not have any columns this is empty array. Please note that, non reference expressions such as CONCAT(name, surname) is not included. To access expressions and columns together use columnsAndExpressions method.

Returns: IndexableArray‹Column, "name", never, true›

# commentData

get commentData(): JSONData | undefined

Inherited from DbObject.commentData

Defined in pg-structure/base/db-object.ts:102

Data which is extracted from database object's comment. Data is extracted from text between special case-insesitive tag (default: [pg-structure][/pg-structure]) and converted to JavaScript object using JSON5. Token name can be specified by using commentDataToken arguments. For details of JSON5, see it's web site: https://json5.org.

# Example

// "Account details. [pg-structure]{ extraData: 2 }[/pg-structure] Also used for logging."
table.comment;               // "Account details. [pg-structure]{ extraData: 2 }[/pg-structure] Also used for logging."
table.commentWithoutData;    // "Account details.  Also used for logging."
table.commentData;           // { extraData: 2 }
table.commentData.extraData; // 2

Returns: JSONData | undefined

# commentWithoutData

get commentWithoutData(): string | undefined

Inherited from DbObject.commentWithoutData

Defined in pg-structure/base/db-object.ts:85

Description or comment of the database object defined in database. If comment contains {@link DbObject#commentData comment data}, it is removed.

# Example

// "Account details. [pg-structure]{ extraData: 2 }[/pg-structure] Also used for logging."
table.commentWithoutData;    // "Account details.  Also used for logging."

Returns: string | undefined

# db

get db(): Db

Inherited from DbObject.db

Defined in pg-structure/base/db-object.ts:68

Database of the database object.

Returns: Db

# fullCatalogName

get fullCatalogName(): string

Inherited from DbObject.fullCatalogName

Defined in pg-structure/base/db-object.ts:35

Full name of the database object including database name.

Returns: string

# fullName

get fullName(): string

Overrides DbObject.fullName

Defined in pg-structure/index.ts:37

Returns: string

# isPartial

get isPartial(): boolean

Defined in pg-structure/index.ts:60

If true, this index is a partial index.

Returns: boolean

# nameCaseType

get nameCaseType(): CaseType

Inherited from DbObject.nameCaseType

Defined in pg-structure/base/db-object.ts:54

Letter casing (i.e snakeCase or camelCase) of the database object name.

# Example

const name = entity.name;                        // ProductDetail
const caseType = entity.nameCaseType;            // camelCase

const otherEntity = otherEntity.name;            // member_protocol
const otherCaseType = otherEntity.nameCaseType;  // snakeCase

Returns: CaseType

# schema

get schema(): Schema

Overrides DbObject.schema

Defined in pg-structure/index.ts:75

Schema this index belongs to.

Returns: Schema

# separator

get separator(): string

Inherited from DbObject.separator

Defined in pg-structure/base/db-object.ts:61

Separator used in database object name. Empty string for came case and underscore for (_) snake case.

Returns: string