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feat: Case-insensitive search for non-ASCII messages (#5052)

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SQLite search with `LIKE` is case-insensitive only for ASCII chars. To make it case-insensitive for
all messages, create a new column `msgs.txt_normalized` defaulting to `NULL` (so we do not bump up
the database size in a migration) and storing lowercased/normalized text there when the row is
created/updated. When doing a search, search over `IFNULL(txt_normalized, txt)`.
This commit is contained in:
iequidoo
2024-03-04 20:44:08 -03:00
committed by iequidoo
parent a5d14b377d
commit f6f4ccc6ea
6 changed files with 51 additions and 18 deletions
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2
src/ephemeral.rs
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@@ -447,7 +447,7 @@ pub(crate) async fn delete_expired_messages(context: &Context, now: i64) -> Resu
for (msg_id, chat_id, viewtype, location_id) in rows {
transaction.execute(
"UPDATE msgs
SET chat_id=?, txt='', subject='', txt_raw='',
SET chat_id=?, txt='', txt_normalized=NULL, subject='', txt_raw='',
mime_headers='', from_id=0, to_id=0, param=''
WHERE id=?",
(DC_CHAT_ID_TRASH, msg_id),