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Functional sqlite backend

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..but not too efficient, creating a new connection pretty much per-query
This commit is contained in:
dbr 2021-05-28 12:09:36 +10:00
parent f91f797244
commit 98f2ab51cb
1 changed files with 22 additions and 4 deletions
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26
sync-server/src/storage/sqlite.rs
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@ -86,7 +86,7 @@ impl SqliteStorage {
let queries = vec![
"CREATE TABLE IF NOT EXISTS clients (client_key STRING PRIMARY KEY, latest_version_id STRING);",
"CREATE TABLE IF NOT EXISTS versions (id STRING PRIMARY KEY, client_key STRING, parent STRING, history_segment STRING);",
"CREATE TABLE IF NOT EXISTS versions (version_id STRING PRIMARY KEY, client_key STRING, parent_version_id STRING, history_segment STRING);",
];
for q in queries {
txn.execute(q, []).context("Creating table")?;
@ -145,6 +145,7 @@ impl<'t> StorageTxn for Txn<'t> {
params![&StoredUuid(client_key), &StoredUuid(latest_version_id)],
)
.context("Create client query")?;
t.commit()?;
Ok(())
}
@ -162,7 +163,24 @@ impl<'t> StorageTxn for Txn<'t> {
client_key: Uuid,
parent_version_id: Uuid,
) -> anyhow::Result<Option<Version>> {
todo!()
let t = self.get_txn()?;
let r = t.query_row(
"SELECT version_id, parent_version_id, history_segment FROM versions WHERE parent_version_id = ? AND client_key = ?",
params![&StoredUuid(parent_version_id), &StoredUuid(client_key)],
|r| {
let version_id: StoredUuid = r.get("version_id")?;
let parent_version_id: StoredUuid = r.get("parent_version_id")?;
Ok(Version{
version_id: version_id.0,
parent_version_id: parent_version_id.0,
history_segment: r.get("history_segment")?,
})}
)
.optional()
.context("Get version query")
?;
Ok(r)
}
fn add_version(
@ -175,7 +193,7 @@ impl<'t> StorageTxn for Txn<'t> {
let t = self.get_txn()?;
t.execute(
"INSERT INTO versions (id, client_key, parent, history_segment) VALUES(?, ?, ?, ?)",
"INSERT INTO versions (version_id, client_key, parent_version_id, history_segment) VALUES(?, ?, ?, ?)",
params![
StoredUuid(version_id),
StoredUuid(client_key),
@ -184,7 +202,7 @@ impl<'t> StorageTxn for Txn<'t> {
],
)
.context("Add version query")?;
t.commit()?;
Ok(())
}