Implementation:Apache Druid Query Context Completions

Knowledge Sources	Apache_Druid
Domains	Web_Console, Query_Editor
Last Updated	2026-02-10 10:00 GMT

Overview

QUERY_CONTEXT_COMPLETIONS is a constant array of JSON completion rules that provides autocomplete suggestions for Druid query context parameters in the JSON editor.

Description

This module exports a typed array of JsonCompletionRule objects that define autocomplete behavior for the query context editor. It covers root-level query context properties such as timeout, priority, caching options, vectorization settings, and multi-stage query (MSQ) specific parameters. Additionally, it provides value-level completions for enumerated fields like selectDestination, taskAssignment, sqlJoinAlgorithm, arrayIngestMode, and vectorize.

Usage

Used by the edit-context-dialog's JSON editor to provide contextual autocomplete suggestions as users type query context parameters.

Code Reference

Source Location

• Repository: Apache Druid
• File: web-console/src/dialogs/edit-context-dialog/query-context-completions.ts
• Lines: 1-155

Signature

import type { JsonCompletionRule } from '../../utils';

export const QUERY_CONTEXT_COMPLETIONS: JsonCompletionRule[];

Import

import { QUERY_CONTEXT_COMPLETIONS } from 'web-console/src/dialogs/edit-context-dialog/query-context-completions';

I/O Contract

Inputs

Name	Type	Required	Description
(none)	-	-	This is a static constant with no runtime inputs

Outputs

Name	Type	Description
QUERY_CONTEXT_COMPLETIONS	JsonCompletionRule[]	Array of completion rules covering root-level properties (timeout, priority, queryId, useCache, vectorize, maxNumTasks, etc.) and value completions for enumerated fields (selectDestination, taskAssignment, sqlJoinAlgorithm, arrayIngestMode, vectorize)

Usage Examples

Passing to JsonInput

<JsonInput
  value={queryContext}
  onChange={setQueryContext}
  jsonCompletions={QUERY_CONTEXT_COMPLETIONS}
/>

Related Pages

• Environment:Apache_Druid_Web_Console_Development