omedusyo/minisql
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Make use of indexes

Browse source
This commit is contained in:
Yuriy Dupyn 2024-02-04 23:54:22 +01:00
parent 2357ea8230
commit 8139112934
5 changed files with 120 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

26
storage_engine/src/main.rs
View file

@ -9,7 +9,7 @@ mod store_header;
use crate::entry::{Entry, EntryDetailed};
use crate::storage_engine::{Store, FilePosition};
use crate::cursor::{ReadCursor, WriteCursor, CursorWithStoreHeader, CursorWithWriteStoreHeader};
use crate::cursor::{ReadCursor, WriteCursor, CursorWithStoreHeader, CursorWithWriteStoreHeader, CursorWithWriteAccessToIndex, CursorWithAccessToIndex};
type Data = u32;
@ -44,10 +44,12 @@ async fn create_or_connect() -> Result<Store<Data>> {
}
async fn append_entry(cursor: &mut WriteCursor<'_, Data>, entry: &Entry<Data>) -> Result<FilePosition> {
async fn append_entry(cursor: &mut WriteCursor<'_, Data>, entry: Entry<Data>) -> Result<FilePosition> {
println!("APPENDING");
println!("entry == {:?}", entry);
let file_position: FilePosition = cursor.append_entry(&entry).await.map_err(|e| e.to_io_or_panic())?;
// let file_position: FilePosition = cursor.append_entry(&entry).await.map_err(|e| e.to_io_or_panic())?;
let file_position: FilePosition = cursor.insert_entry(entry).await.map_err(|e| e.to_io_or_panic())?;
println!("file_position == {:?}", file_position);
Ok(file_position)
}
@ -63,17 +65,20 @@ async fn read_entry(cursor: &mut ReadCursor<'_, Data>, file_position: FilePositi
async fn append_bunch_of_entries(store: &mut Store<Data>) -> Result<()> {
let mut cursor = store.write_cursor().await.map_err(|e| e.to_io_or_panic())?;
let entry0: Entry<u32> = Entry::new(vec![1, 2, 3, 4, 5]);
append_entry(&mut cursor, &entry0).await?;
append_entry(&mut cursor, entry0).await?;
let entry1: Entry<u32> = Entry::new(vec![200, 200, 5, 6, 7]);
append_entry(&mut cursor, &entry1).await?;
append_entry(&mut cursor, entry1).await?;
// println!("{:?}", store.read_all_bytes().await?);
let entry2: Entry<u32> = Entry::new(vec![99, 98, 97, 96, 95]);
append_entry(&mut cursor, &entry2).await?;
append_entry(&mut cursor, entry2).await?;
let entry3: Entry<u32> = Entry::new(vec![50,50,50,50,50]);
append_entry(&mut cursor, &entry3).await?;
append_entry(&mut cursor, entry3).await?;
let entry4: Entry<u32> = Entry::new(vec![1,50,50,50,50]); // same 0-th column as entry0
append_entry(&mut cursor, entry4).await?;
Ok(())
}
@ -141,6 +146,13 @@ async fn main() -> Result<()> {
println!("{:?}", x);
}
{
let mut cursor = store.read_cursor().await.map_err(|e| e.to_io_or_panic())?;
let entries = cursor.index_lookup(0, &1).await.map_err(|e| e.to_io_or_panic())?;
println!("ARE INDEXES WORKING???");
println!("{:?}", entries);
}
// {
// let mut cursor = store.read_cursor().await.map_err(|e| e.to_io_or_panic())?;
// let column = 3;