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Optimize read messages query

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Josh Perez 2021-05-07 14:50:14 -07:00 • committed by GitHub
parent 0ccc607100
commit 1276368f94
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1 changed files with 99 additions and 64 deletions
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163
ts/sql/Server.ts
View file

@ -24,8 +24,8 @@ import {
keyBy,
last,
map,
pick,
omit,
pick,
} from 'lodash';
import { GroupV2MemberType } from '../model-types.d';
@ -3001,7 +3001,7 @@ async function getMessageBySender({
}
function getExpireData(
messageExpireTimer: number,
expireTimer: number,
readAt?: number
): {
expirationStartTimestamp: number;
@ -3009,7 +3009,7 @@ function getExpireData(
} {
const expirationStartTimestamp = Math.min(Date.now(), readAt || Date.now());
const expiresAt = getExpiresAt({
expireTimer: messageExpireTimer,
expireTimer,
expirationStartTimestamp,
});
@ -3026,40 +3026,70 @@ function getExpireData(
}
function updateExpirationTimers(
messageExpireTimer: number,
messagesWithExpireTimer: Set<string>,
conversationId: string,
newestUnreadId: number,
messagesWithExpireTimer: Map<
string,
{
id: string;
expireTimer: number;
}
>,
readAt?: number
) {
const { expirationStartTimestamp, expiresAt } = getExpireData(
messageExpireTimer,
readAt
);
const db = getInstance();
const stmt = db.prepare<Query>(
`
UPDATE messages
SET
unread = 0,
expires_at = $expiresAt,
expirationStartTimestamp = $expirationStartTimestamp,
json = json_patch(json, $jsonPatch)
WHERE
id = $id
`
);
messagesWithExpireTimer.forEach(id => {
stmt.run({
id,
const rowsWithSameExpireTimer = new Map();
for (const row of messagesWithExpireTimer.values()) {
const { expireTimer } = row;
const expireTimerRow = rowsWithSameExpireTimer.get(expireTimer);
if (expireTimerRow) {
return;
}
const { expirationStartTimestamp, expiresAt } = getExpireData(
expireTimer,
readAt
);
rowsWithSameExpireTimer.set(expireTimer, {
expirationStartTimestamp,
expireTimer,
expiresAt,
jsonPatch: JSON.stringify({
expirationStartTimestamp,
expires_at: expiresAt,
unread: 0,
}),
});
});
}
rowsWithSameExpireTimer.forEach(
({ expirationStartTimestamp, expireTimer, expiresAt }) => {
db.prepare<Query>(
`
UPDATE messages
SET
unread = 0,
expires_at = $expiresAt,
expirationStartTimestamp = $expirationStartTimestamp,
json = json_patch(json, $jsonPatch)
WHERE
unread = 0 AND
conversationId = $conversationId AND
received_at <= $newestUnreadId AND
expireTimer = $expireTimer
`
).run({
conversationId,
expirationStartTimestamp,
expireTimer,
expiresAt,
jsonPatch: JSON.stringify({
expirationStartTimestamp,
expires_at: expiresAt,
unread: 0,
}),
newestUnreadId,
});
}
);
}
async function getUnreadByConversationAndMarkRead(
@ -3074,7 +3104,7 @@ async function getUnreadByConversationAndMarkRead(
const rows = db
.prepare<Query>(
`
SELECT id, expireTimer, expirationStartTimestamp, json
SELECT id, expires_at, expireTimer, expirationStartTimestamp, json
FROM messages WHERE
unread = $unread AND
conversationId = $conversationId AND
@ -3088,44 +3118,48 @@ async function getUnreadByConversationAndMarkRead(
newestUnreadId,
});
let messageExpireTimer: number | undefined;
const messagesWithExpireTimer: Set<string> = new Set();
const messagesToMarkRead: Array<string> = [];
const messagesWithExpireTimer: Map<
string,
{
id: string;
expireTimer: number;
}
> = new Map();
rows.forEach(row => {
if (row.expireTimer && !row.expirationStartTimestamp) {
messageExpireTimer = row.expireTimer;
messagesWithExpireTimer.add(row.id);
if (
row.expireTimer &&
(!row.expirationStartTimestamp || !row.expires_at)
) {
messagesWithExpireTimer.set(row.id, {
id: row.id,
expireTimer: row.expireTimer,
});
}
messagesToMarkRead.push(row.id);
});
if (messagesToMarkRead.length) {
const stmt = db.prepare<Query>(
db.prepare<Query>(
`
UPDATE messages
SET
unread = 0,
json = json_patch(json, $jsonPatch)
WHERE
unread = $unread AND
conversationId = $conversationId AND
received_at <= $newestUnreadId;
`
UPDATE messages
SET
unread = 0,
json = json_patch(json, $jsonPatch)
WHERE
id = $id;
`
);
).run({
conversationId,
jsonPatch: JSON.stringify({ unread: 0 }),
newestUnreadId,
unread: 1,
});
messagesToMarkRead.forEach(id =>
stmt.run({
id,
jsonPatch: JSON.stringify({ unread: 0 }),
})
);
}
if (messageExpireTimer && messagesWithExpireTimer.size) {
// We use the messageExpireTimer set above from whichever row we have
// in the database. Since this is the same conversation the expireTimer
// should be the same for all messages within it.
if (messagesWithExpireTimer.size) {
updateExpirationTimers(
messageExpireTimer,
conversationId,
newestUnreadId,
messagesWithExpireTimer,
readAt
);
@ -3134,9 +3168,10 @@ async function getUnreadByConversationAndMarkRead(
return rows.map(row => {
const json = jsonToObject(row.json);
const expireAttrs = {};
if (messageExpireTimer && messagesWithExpireTimer.has(row.id)) {
const expiringMessage = messagesWithExpireTimer.get(row.id);
if (expiringMessage) {
const { expirationStartTimestamp, expiresAt } = getExpireData(
messageExpireTimer,
expiringMessage.expireTimer,
readAt
);
Object.assign(expireAttrs, {