Add indices to improve messages_on_delete trigger
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4 changed files with 198 additions and 110 deletions
56
ts/test-node/sql/migration_1090_test.ts
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56
ts/test-node/sql/migration_1090_test.ts
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// Copyright 2024 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { assert } from 'chai';
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import type { Database } from '@signalapp/better-sqlite3';
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import SQL from '@signalapp/better-sqlite3';
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import { updateToVersion } from './helpers';
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describe('SQL/updateToSchemaVersion1090', () => {
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let db: Database;
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beforeEach(() => {
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db = new SQL(':memory:');
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updateToVersion(db, 1090);
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});
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afterEach(() => {
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db.close();
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});
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describe('Additional messages_on_delete indexes', () => {
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it('uses index for selecting reactions by messageId', () => {
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const details = db
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.prepare(
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`EXPLAIN QUERY PLAN
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SELECT rowid FROM reactions
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WHERE messageId = '123';
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`
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)
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.all()
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.map(step => step.detail)
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.join(', ');
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assert.strictEqual(
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details,
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'SEARCH reactions USING COVERING INDEX reactions_messageId (messageId=?)'
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);
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});
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it('uses index for selecting storyReads by storyId', () => {
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const details = db
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.prepare(
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`EXPLAIN QUERY PLAN
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DELETE FROM storyReads WHERE storyId = '123';
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`
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)
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.all()
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.map(step => step.detail)
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.join(', ');
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assert.strictEqual(
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details,
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'SEARCH storyReads USING INDEX storyReads_storyId (storyId=?)'
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);
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});
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});
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});
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