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Optimize getAdjacentMessagesByConversationSync

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Fedor Indutny 2023-05-17 10:35:21 -07:00 committed by GitHub
parent 0032d49e23
commit 6e5d9f5dd8
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1 changed files with 23 additions and 16 deletions
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39
ts/sql/Server.ts
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@ -2435,26 +2435,27 @@ function getAdjacentMessagesByConversationSync(
): Array<MessageTypeUnhydrated> {
const db = getInstance();
const timeFilter =
direction === AdjacentDirection.Older
? sqlFragment`
(received_at = ${receivedAt} AND sent_at < ${sentAt}) OR
received_at < ${receivedAt}
`
: sqlFragment`
(received_at = ${receivedAt} AND sent_at > ${sentAt}) OR
received_at > ${receivedAt}
`;
let timeFilters: { first: QueryFragment; second: QueryFragment };
let timeOrder: QueryFragment;
const timeOrder =
direction === AdjacentDirection.Older
? sqlFragment`DESC`
: sqlFragment`ASC`;
if (direction === AdjacentDirection.Older) {
timeFilters = {
first: sqlFragment`received_at = ${receivedAt} AND sent_at < ${sentAt}`,
second: sqlFragment`received_at < ${receivedAt}`,
};
timeOrder = sqlFragment`DESC`;
} else {
timeFilters = {
first: sqlFragment`received_at = ${receivedAt} AND sent_at > ${sentAt}`,
second: sqlFragment`received_at > ${receivedAt}`,
};
timeOrder = sqlFragment`ASC`;
}
const requireDifferentMessage =
direction === AdjacentDirection.Older || requireVisualMediaAttachments;
let template = sqlFragment`
const createQuery = (timeFilter: QueryFragment): QueryFragment => sqlFragment`
SELECT json FROM messages WHERE
conversationId = ${conversationId} AND
${
@ -2472,7 +2473,13 @@ function getAdjacentMessagesByConversationSync(
(
${timeFilter}
)
ORDER BY received_at ${timeOrder}, sent_at ${timeOrder}
ORDER BY received_at ${timeOrder}, sent_at ${timeOrder}
`;
let template = sqlFragment`
SELECT first.json FROM (${createQuery(timeFilters.first)}) as first
UNION ALL
SELECT second.json FROM (${createQuery(timeFilters.second)}) as second
`;
// See `filterValidAttachments` in ts/state/ducks/lightbox.ts