analytics-catalog-api/me.ahoo.wow.analytics.catalog.api.dataset/DatasetDefinition

DatasetDefinition

data class DatasetDefinition(val sources: List<DatasetSource>, val subject: String, val columns: List<DatasetColumn>, val joins: List<DatasetJoin> = emptyList(), val filters: List<String> = emptyList(), val identity: String? = null, val eventTime: String? = null)

What a wide table is made of (-2): catalog sources, each under an alias, the joins that bring every source but the subject in, the columns it shows, and the filters its rows pass.

The subject is the principal source: its tenant, owner and space columns are the dataset's scope, as tenant_id, owner_id and space_id.
Every join keys on the tenant: one of its keys pairs the tenant columns of the two sides, unless the joined source is a platform dimension, declared and approved as such.
A reference to a source's column is <alias>.<column>, or <alias>.<column>.<path> for a value inside a JSON column; a computed column and a filter are expressions over such references and the functions the catalog allows.
identity and eventTime name columns of the dataset: the one that identifies a row, and when it last changed.

Constructors

DatasetDefinition

constructor(sources: List<DatasetSource>, subject: String, columns: List<DatasetColumn>, joins: List<DatasetJoin> = emptyList(), filters: List<String> = emptyList(), identity: String? = null, eventTime: String? = null)

Properties

columns

val columns: List<DatasetColumn>

eventTime

val eventTime: String?

filters

val filters: List<String>

identity

val identity: String?

joins

val joins: List<DatasetJoin>

sources

val sources: List<DatasetSource>

subject

val subject: String