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LabelsToFields: avoid MutableDataFrame (#24493)

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This commit is contained in:
Ryan McKinley
2020-05-11 13:41:33 -07:00
committed by GitHub
parent 1ece878037
commit c8d3d15292
1 changed files with 19 additions and 14 deletions
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packages/grafana-data/src/transformations/transformers/labelsToFields.ts
+19 -14
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@@ -1,9 +1,9 @@
import { DataFrame, DataTransformerInfo, FieldType, Field } from '../../types';
import { DataTransformerID } from './ids';
import { MutableDataFrame } from '../../dataframe';
import { ArrayVector } from '../../vector';
import { filterFieldsTransformer } from './filter';
import { FieldMatcherID } from '..';
import { MutableField } from '../../dataframe';
export interface LabelsToFieldsOptions {}
type MapItem = { type: FieldType; values: Record<string, any>; isValue: boolean };
@@ -28,10 +28,10 @@ export const labelsToFieldsTransformer: DataTransformerInfo<LabelsToFieldsOption
}
const columnsMap = createColumnsMap(framesWithTimeField, framesWithoutTimeField);
const processed = createFields(columnsMap);
const fields = createFields(columnsMap);
const values: Record<string, any[]> = {};
const timeColumnItem = columnsMap[processed.fields[0].name];
const timeColumnItem = columnsMap[fields[0].name];
const seriesIndexStrings = Object.keys(timeColumnItem);
for (const seriesIndexString of seriesIndexStrings) {
const seriesItem = timeColumnItem[seriesIndexString];
@@ -41,9 +41,9 @@ export const labelsToFieldsTransformer: DataTransformerInfo<LabelsToFieldsOption
if (!values[timeValueString]) {
values[timeValueString] = [];
}
let row = new Array(processed.fields.length);
for (let index = 0; index < processed.fields.length; index++) {
const field = processed.fields[index];
let row = new Array(fields.length);
for (let index = 0; index < fields.length; index++) {
const field = fields[index];
const valueItem = columnsMap[field.name][seriesIndexString];
const value = valueItem ? valueItem.values[timeValueString] ?? null : null;
row[index] = value;
@@ -55,13 +55,18 @@ export const labelsToFieldsTransformer: DataTransformerInfo<LabelsToFieldsOption
const timestamps = Object.values(values);
for (const timestamp of timestamps) {
for (const row of timestamp) {
for (let fieldIndex = 0; fieldIndex < processed.fields.length; fieldIndex++) {
processed.fields[fieldIndex].values.add(row[fieldIndex]);
for (let fieldIndex = 0; fieldIndex < fields.length; fieldIndex++) {
fields[fieldIndex].values.add(row[fieldIndex]);
}
}
}
return [processed];
return [
{
fields,
length: fields[0].values.length,
},
];
},
};
@@ -145,9 +150,9 @@ function createColumnsMap(framesWithTimeField: DataFrame[], framesWithoutTimeFie
return map;
}
function createFields(columnsMap: Map) {
function createFields(columnsMap: Map): MutableField[] {
const columns = Object.keys(columnsMap);
const processed = new MutableDataFrame();
const fields: MutableField[] = [];
const valueColumns: string[] = [];
for (const column of columns) {
@@ -156,13 +161,13 @@ function createFields(columnsMap: Map) {
valueColumns.push(column);
continue;
}
processed.addField({ type: columnItem.type, values: new ArrayVector(), name: column });
fields.push({ type: columnItem.type, values: new ArrayVector(), name: column, config: {} });
}
for (const column of valueColumns) {
const columnItem = Object.values<MapItem>(columnsMap[column])[0];
processed.addField({ type: columnItem.type, values: new ArrayVector(), name: column });
fields.push({ type: columnItem.type, values: new ArrayVector(), name: column, config: {} });
}
return processed;
return fields;
}