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I want to integrate Paging with SQLite in existing application. There are around 90 tables in my database so its time consuming to convert to Room. I also tried LIMIT...OFFSET but that takes time to process data every time.
Thanks.
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SQLite Limit:In the LIMIT clause, you can select a specific number of rows starting from a specific position using the OFFSET clause. For example, “LIMIT 4 OFFSET 4” will ignore the first 4 rows, and returned 4 rows starting from the fifth rows, so you will get rows 5,6,7, and 8.
Actually, SQLite will easily do 50,000 or more INSERT statements per second on an average desktop computer. But it will only do a few dozen transactions per second.
Pagination is the process of displaying the data on multiple pages rather than showing them on a single page. You usually do pagination when there is a database with numerous records. Dividing those records increases the readability of the data. It can retrieve this data as per the user's requests.
You can use limit and offset . And your query will be like this.
An example:
A) We have an table with 4 record of id column, values are 1 | 2 | 3 | 4 in respective 4 rows.
B) IF perform select * from TABLE_NAME: it returned all record from table in order 1 | 2 | 3 | 4 .
C) If we need total(e.g. limit) 1 record and it should start from offset index 2, then use
select * from TABLE_NAME limit 1 offset 2
This will return record index | 3 | as request limit = 1 & offset index = 2.
Same can be achieved using select * from company limit 2, 1;
Note, here 2 is offset & 1 is limit(order reverse).
Since Android SDK do not provide separate attribute to set offset, in that case last 'limit' attribute of SQLiteDatabase.query(..., limit) can be used as limit 2, 1.
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