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Horrible implementation of range for sqlite
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This commit is contained in:
Alex 2022-06-02 23:43:32 +02:00
parent c439cb11a9
commit 0e4f336887
Signed by: lx
GPG Key ID: 0E496D15096376BE
1 changed files with 92 additions and 2 deletions
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94
src/db/sqlite_adapter.rs
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@ -132,7 +132,52 @@ impl IDb for SqliteDb {
high: Bound<&'r [u8]>,
) -> Result<ValueIter<'a>> {
let tree = self.get_tree(tree)?;
unimplemented!();
let mut sql = format!("SELECT k, v FROM {}", tree);
let mut params: Vec<Vec<u8>> = vec![];
match low {
Bound::Included(b) => {
sql.push_str(" WHERE k >= ?1");
params.push(b.to_vec());
}
Bound::Excluded(b) => {
sql.push_str(" WHERE k > ?1");
params.push(b.to_vec());
}
Bound::Unbounded => (),
};
match high {
Bound::Included(b) => {
if !params.is_empty() {
sql.push_str(" AND k <= ?2");
} else {
sql.push_str(" WHERE k <= ?1");
}
params.push(b.to_vec());
}
Bound::Excluded(b) => {
if !params.is_empty() {
sql.push_str(" AND k < ?2");
} else {
sql.push_str(" WHERE k < ?1");
}
params.push(b.to_vec());
}
Bound::Unbounded => (),
}
sql.push_str(" ORDER BY k ASC");
let params = params
.iter()
.map(|x| x as &dyn rusqlite::ToSql)
.collect::<Vec<_>>();
DbValueIterator::new::<&[&dyn rusqlite::ToSql]>(
self.db.lock().unwrap(),
&sql,
params.as_ref(),
)
}
fn range_rev<'a, 'r>(
&'a self,
@ -141,7 +186,52 @@ impl IDb for SqliteDb {
high: Bound<&'r [u8]>,
) -> Result<ValueIter<'a>> {
let tree = self.get_tree(tree)?;
unimplemented!();
let mut sql = format!("SELECT k, v FROM {}", tree);
let mut params: Vec<Vec<u8>> = vec![];
match low {
Bound::Included(b) => {
sql.push_str(" WHERE k >= ?1");
params.push(b.to_vec());
}
Bound::Excluded(b) => {
sql.push_str(" WHERE k > ?1");
params.push(b.to_vec());
}
Bound::Unbounded => (),
};
match high {
Bound::Included(b) => {
if !params.is_empty() {
sql.push_str(" AND k <= ?2");
} else {
sql.push_str(" WHERE k <= ?1");
}
params.push(b.to_vec());
}
Bound::Excluded(b) => {
if !params.is_empty() {
sql.push_str(" AND k < ?2");
} else {
sql.push_str(" WHERE k < ?1");
}
params.push(b.to_vec());
}
Bound::Unbounded => (),
}
sql.push_str(" ORDER BY k DESC");
let params = params
.iter()
.map(|x| x as &dyn rusqlite::ToSql)
.collect::<Vec<_>>();
DbValueIterator::new::<&[&dyn rusqlite::ToSql]>(
self.db.lock().unwrap(),
&sql,
params.as_ref(),
)
}
// ----