[Backport 8.16] Add streaming support to Arrow helper (#2430)
This commit is contained in:
Josh Mock
@ -13,6 +13,11 @@
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You can find all the API changes
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https://www.elastic.co/guide/en/elasticsearch/reference/8.16/release-notes-8.16.0.html[here].
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[discrete]
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===== Support Apache Arrow in ES|QL helper
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The ES|QL helper can now return results as an Apache Arrow `Table` or `RecordBatchReader`, which enables high-performance calculations on ES|QL results, even if the response data is larger than the system's available memory. See <<esql-helper>> for more information.
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[discrete]
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==== Fixes
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@ -349,7 +349,7 @@ In this case, the result will be:
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body: object | boolean
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statusCode: number
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headers: object
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warnings: [string],
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warnings: string[],
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meta: object
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}
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----
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@ -410,19 +410,23 @@ The supported request specific options are:
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[cols=2*]
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|===
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|`ignore`
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|`[number]` - HTTP status codes which should not be considered errors for this request. +
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|`number[]` - HTTP status codes which should not be considered errors for this request. +
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_Default:_ `null`
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|`requestTimeout`
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|`number` - Max request timeout for the request in milliseconds, it overrides the client default. +
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|`number | string` - Max request timeout for the request in milliseconds, it overrides the client default. +
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_Default:_ `30000`
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|`retryOnTimeout`
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|`boolean` - Retry requests that have timed out.
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_Default:_ `false`
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|`maxRetries`
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|`number` - Max number of retries for the request, it overrides the client default. +
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_Default:_ `3`
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|`compression`
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|`string, boolean` - Enables body compression for the request. +
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|`string | boolean` - Enables body compression for the request. +
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_Options:_ `false`, `'gzip'` +
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_Default:_ `false`
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@ -446,6 +450,10 @@ _Default:_ `null`
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|`any` - Custom object per request. _(you can use it to pass data to the clients events)_ +
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_Default:_ `null`
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|`opaqueId`
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|`string` - Set the `X-Opaque-Id` HTTP header. See {ref}/api-conventions.html#x-opaque-id
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_Default:_ `null`
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|`maxResponseSize`
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|`number` - When configured, it verifies that the uncompressed response size is lower than the configured number, if it's higher it will abort the request. It cannot be higher than buffer.constants.MAX_STRING_LENTGH +
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_Default:_ `null`
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@ -458,6 +466,17 @@ _Default:_ `null`
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|`AbortSignal` - The AbortSignal instance to allow request abortion. +
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_Default:_ `null`
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|`meta`
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|`boolean` - Rather than returning the body, return an object containing `body`, `statusCode`, `headers` and `meta` keys +
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_Default_: `false`
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|`redaction`
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|`object` - Options for redacting potentially sensitive data from error metadata. See <<redaction>>.
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|`retryBackoff`
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|`(min: number, max: number, attempt: number) => number;` - A function that calculates how long to sleep, in seconds, before the next request retry +
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_Default:_ A built-in function that uses exponential backoff with jitter.
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|===
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[discrete]
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@ -707,3 +707,42 @@ const result = await client.helpers
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.esql({ query: 'FROM sample_data | LIMIT 2' })
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.toRecords<EventLog>()
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----
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[discrete]
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===== `toArrowReader`
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~Added~ ~in~ ~`v8.16.0`~
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ES|QL can return results in multiple binary formats, including https://arrow.apache.org/[Apache Arrow]'s streaming format. Because it is a very efficient format to read, it can be valuable for performing high-performance in-memory analytics. And, because the response is streamed as batches of records, it can be used to produce aggregations and other calculations on larger-than-memory data sets.
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`toArrowReader` returns a https://arrow.apache.org/docs/js/classes/Arrow_dom.RecordBatchReader.html[`RecordBatchStreamReader`].
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[source,ts]
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----
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const reader = await client.helpers
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.esql({ query: 'FROM sample_data' })
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.toArrowReader()
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// print each record as JSON
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for (const recordBatch of reader) {
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for (const record of recordBatch) {
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console.log(record.toJSON())
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}
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}
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----
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[discrete]
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===== `toArrowTable`
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~Added~ ~in~ ~`v8.16.0`~
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If you would like to pull the entire data set in Arrow format but without streaming, you can use the `toArrowTable` helper to get a https://arrow.apache.org/docs/js/classes/Arrow_dom.Table.html[Table] back instead.
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[source,ts]
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----
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const table = await client.helpers
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.esql({ query: 'FROM sample_data' })
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.toArrowTable()
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console.log(table.toArray())
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----
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@ -35,8 +35,39 @@ class MyTransport extends Transport {
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==== Supported content types
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- `application/json`, in this case the transport will return a plain JavaScript object
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- `text/plain`, in this case the transport will return a plain string
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- `application/vnd.mapbox-vector-tile`, in this case the transport will return a Buffer
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- `application/vnd.elasticsearch+json`, in this case the transport will return a plain JavaScript object
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Depending on the `content-type` of the response, the transport will return the body as different types:
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[cols="1,1"]
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|===
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|Content-Type |JavaScript type
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|`application/json`
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|`object`
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|`text/plain`
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|`string`
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|`application/vnd.elasticsearch+json`
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|`object`
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|`application/vnd.mapbox-vector-tile`
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|`Buffer`
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|`application/vnd.apache.arrow.stream`
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|`Buffer`
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|`application/vnd.elasticsearch+arrow+stream`
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|`Buffer`
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|`application/smile`
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|`Buffer`
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|`application/vnd.elasticsearch+smile`
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|`Buffer`
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|`application/cbor`
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|`Buffer`
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|`application/vnd.elasticsearch+cbor`
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|`Buffer`
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|===
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@ -87,7 +87,8 @@
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"zx": "^7.2.2"
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},
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"dependencies": {
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"@elastic/transport": "^8.7.0",
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"@elastic/transport": "^8.9.1",
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"apache-arrow": "^18.0.0",
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"tslib": "^2.4.0"
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},
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"tap": {
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@ -25,6 +25,7 @@ import assert from 'node:assert'
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import * as timersPromises from 'node:timers/promises'
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import { Readable } from 'node:stream'
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import { errors, TransportResult, TransportRequestOptions, TransportRequestOptionsWithMeta } from '@elastic/transport'
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import { Table, TypeMap, tableFromIPC, RecordBatchStreamReader } from 'apache-arrow/Arrow.node'
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import Client from './client'
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import * as T from './api/types'
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@ -155,6 +156,8 @@ export interface EsqlResponse {
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export interface EsqlHelper {
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toRecords: <TDocument>() => Promise<EsqlToRecords<TDocument>>
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toArrowTable: () => Promise<Table<TypeMap>>
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toArrowReader: () => Promise<RecordBatchStreamReader>
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}
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export interface EsqlToRecords<TDocument> {
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@ -985,6 +988,8 @@ export default class Helpers {
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})
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}
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const metaHeader = this[kMetaHeader]
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const helper: EsqlHelper = {
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/**
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* Pivots ES|QL query results into an array of row objects, rather than the default format where each row is an array of values.
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@ -996,6 +1001,31 @@ export default class Helpers {
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const records: TDocument[] = toRecords(response)
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const { columns } = response
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return { records, columns }
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},
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async toArrowTable (): Promise<Table<TypeMap>> {
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if (metaHeader !== null) {
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reqOptions.headers = reqOptions.headers ?? {}
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reqOptions.headers['x-elastic-client-meta'] = `${metaHeader as string},h=qa`
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}
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params.format = 'arrow'
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const response = await client.esql.query(params, reqOptions)
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return tableFromIPC(response)
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},
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async toArrowReader (): Promise<RecordBatchStreamReader> {
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if (metaHeader !== null) {
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reqOptions.headers = reqOptions.headers ?? {}
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reqOptions.headers['x-elastic-client-meta'] = `${metaHeader as string},h=qa`
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reqOptions.asStream = true
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}
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params.format = 'arrow'
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const response = await client.esql.query(params, reqOptions)
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return RecordBatchStreamReader.from(response)
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}
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}
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@ -18,6 +18,7 @@
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*/
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import { test } from 'tap'
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import * as arrow from 'apache-arrow/Arrow.node'
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import { connection } from '../../utils'
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import { Client } from '../../../'
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@ -109,5 +110,185 @@ test('ES|QL helper', t => {
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t.end()
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})
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test('toArrowTable', t => {
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t.test('Parses a binary response into an Arrow table', async t => {
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const binaryContent = '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'
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const MockConnection = connection.buildMockConnection({
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onRequest (_params) {
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return {
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body: Buffer.from(binaryContent, 'base64'),
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statusCode: 200,
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headers: {
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'content-type': 'application/vnd.elasticsearch+arrow+stream'
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}
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}
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}
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})
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const client = new Client({
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node: 'http://localhost:9200',
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Connection: MockConnection
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})
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const result = await client.helpers.esql({ query: 'FROM sample_data' }).toArrowTable()
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t.ok(result instanceof arrow.Table)
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const table = [...result]
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t.same(table[0], [
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["amount", 4.900000095367432],
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["date", 1729532586965],
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])
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t.end()
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})
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t.test('ESQL helper uses correct x-elastic-client-meta helper value', async t => {
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const binaryContent = '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'
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const MockConnection = connection.buildMockConnection({
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onRequest (params) {
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const header = params.headers?.['x-elastic-client-meta'] ?? ''
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t.ok(header.includes('h=qa'), `Client meta header does not include ESQL helper value: ${header}`)
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return {
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body: Buffer.from(binaryContent, 'base64'),
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statusCode: 200,
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headers: {
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'content-type': 'application/vnd.elasticsearch+arrow+stream'
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}
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}
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}
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})
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const client = new Client({
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node: 'http://localhost:9200',
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Connection: MockConnection
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})
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await client.helpers.esql({ query: 'FROM sample_data' }).toArrowTable()
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t.end()
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})
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t.end()
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})
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test('toArrowReader', t => {
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t.test('Parses a binary response into an Arrow stream reader', async t => {
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const binaryContent = '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'
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const MockConnection = connection.buildMockConnection({
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onRequest (_params) {
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return {
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body: Buffer.from(binaryContent, 'base64'),
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statusCode: 200,
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headers: {
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'content-type': 'application/vnd.elasticsearch+arrow+stream'
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}
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}
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}
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})
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const client = new Client({
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node: 'http://localhost:9200',
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Connection: MockConnection
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})
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const result = await client.helpers.esql({ query: 'FROM sample_data' }).toArrowReader()
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t.ok(result.isStream())
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const recordBatch = result.next().value
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t.same(recordBatch.get(0)?.toJSON(), {
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amount: 4.900000095367432,
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date: 1729532586965,
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})
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t.end()
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})
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t.test('ESQL helper uses correct x-elastic-client-meta helper value', async t => {
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const binaryContent = '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'
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|
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const MockConnection = connection.buildMockConnection({
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onRequest (params) {
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const header = params.headers?.['x-elastic-client-meta'] ?? ''
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t.ok(header.includes('h=qa'), `Client meta header does not include ESQL helper value: ${header}`)
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return {
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body: Buffer.from(binaryContent, 'base64'),
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statusCode: 200,
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headers: {
|
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'content-type': 'application/vnd.elasticsearch+arrow+stream'
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}
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||||
}
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||||
}
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||||
})
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const client = new Client({
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node: 'http://localhost:9200',
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Connection: MockConnection
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})
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await client.helpers.esql({ query: 'FROM sample_data' }).toArrowReader()
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t.end()
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})
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t.test('multi-batch support', async t => {
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const intType = new arrow.Uint32
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const floatType = new arrow.Float32
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const schema = new arrow.Schema([
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arrow.Field.new('id', intType),
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arrow.Field.new('val', floatType)
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])
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function getBatch(ids: number[], vals: number[]) {
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const id = arrow.makeData({ type: intType, data: ids })
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const val = arrow.makeData({ type: floatType, data: vals })
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return new arrow.RecordBatch({ id, val })
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}
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const batch1 = getBatch([1, 2, 3], [0.1, 0.2, 0.3])
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const batch2 = getBatch([4, 5, 6], [0.4, 0.5, 0.6])
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const batch3 = getBatch([7, 8, 9], [0.7, 0.8, 0.9])
|
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const table = new arrow.Table(schema, [
|
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new arrow.RecordBatch(schema, batch1.data),
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new arrow.RecordBatch(schema, batch2.data),
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new arrow.RecordBatch(schema, batch3.data),
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])
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const MockConnection = connection.buildMockConnection({
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onRequest (_params) {
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return {
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body: Buffer.from(arrow.tableToIPC(table, "stream")),
|
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statusCode: 200,
|
||||
headers: {
|
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'content-type': 'application/vnd.elasticsearch+arrow+stream'
|
||||
}
|
||||
}
|
||||
}
|
||||
})
|
||||
|
||||
const client = new Client({
|
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node: 'http://localhost:9200',
|
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Connection: MockConnection
|
||||
})
|
||||
|
||||
const result = await client.helpers.esql({ query: 'FROM sample_data' }).toArrowReader()
|
||||
t.ok(result.isStream())
|
||||
|
||||
let counter = 0
|
||||
for (const batch of result) {
|
||||
for (const row of batch) {
|
||||
counter++
|
||||
const { id, val } = row.toJSON()
|
||||
t.equal(id, counter)
|
||||
// floating points are hard in JS
|
||||
t.equal((Math.round(val * 10) / 10).toFixed(1), (counter * 0.1).toFixed(1))
|
||||
}
|
||||
}
|
||||
t.end()
|
||||
})
|
||||
|
||||
t.end()
|
||||
})
|
||||
|
||||
t.end()
|
||||
})
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
{
|
||||
"compilerOptions": {
|
||||
"target": "es2019",
|
||||
"target": "ES2019",
|
||||
"module": "commonjs",
|
||||
"moduleResolution": "node",
|
||||
"declaration": true,
|
||||
@ -21,7 +21,8 @@
|
||||
"importHelpers": true,
|
||||
"outDir": "lib",
|
||||
"lib": [
|
||||
"esnext"
|
||||
"ES2019",
|
||||
"dom"
|
||||
]
|
||||
},
|
||||
"formatCodeOptions": {
|
||||
|
||||
Reference in New Issue
Block a user