Harmonization of Data Lake Query Result

As part of the refactoring and integration of the Data Lake REST API into the Data Explorer, the return type of Data Lake queries needs to be harmonized.

Status Quo

org.apache.streampipes.model.datalake | ui/src/app/core-model/datalake

Data Result

The return type for simple queries without grouping or paging is a DataResult object.

DataResult {
    measureName: string;
    total: number;
    headers: string[];
    rows: any[];
    labels: string[];
}

Note: "labels" is not used in the entire project and is therefore obsolete.

Grouped Data Result

The return type for queries with grouping is a GroupedDataResult object.

GroupedDataResult {
    total: number;
    dataResults: Map<string, DataResult>;
}

Page Result

The return type for queries with paging is a PageResult object, that extends DataResult class.

PageResult {
	measureName: string;
    total: number;
    headers: string[];
    rows: any[];
    labels: string[];

    page: number;
    pageSum: number;
}

Note: "labels" from DataResult as well as "pageSum" are not used in the entire project and are therefore obsolete.