surrealdb/sql/statements/define/
database.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
use crate::ctx::Context;
use crate::dbs::{Options, Transaction};
use crate::doc::CursorDoc;
use crate::err::Error;
use crate::iam::{Action, ResourceKind};
use crate::sql::{changefeed::ChangeFeed, Base, Ident, Strand, Value};
use derive::Store;
use revision::revisioned;
use serde::{Deserialize, Serialize};
use std::fmt::{self, Display};

#[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Store, Hash)]
#[revisioned(revision = 1)]
pub struct DefineDatabaseStatement {
	pub id: Option<u32>,
	pub name: Ident,
	pub comment: Option<Strand>,
	pub changefeed: Option<ChangeFeed>,
}

impl DefineDatabaseStatement {
	/// Process this type returning a computed simple Value
	pub(crate) async fn compute(
		&self,
		_ctx: &Context<'_>,
		opt: &Options,
		txn: &Transaction,
		_doc: Option<&CursorDoc<'_>>,
	) -> Result<Value, Error> {
		// Allowed to run?
		opt.is_allowed(Action::Edit, ResourceKind::Database, &Base::Ns)?;
		// Claim transaction
		let mut run = txn.lock().await;
		// Clear the cache
		run.clear_cache();
		// Process the statement
		let key = crate::key::namespace::db::new(opt.ns(), &self.name);
		let ns = run.add_ns(opt.ns(), opt.strict).await?;
		// Set the id
		if self.id.is_none() && ns.id.is_some() {
			let mut db = self.clone();
			db.id = Some(run.get_next_db_id(ns.id.unwrap()).await?);
			// Store the db
			run.set(key, db).await?;
		} else {
			// Store the db
			run.set(key, self).await?;
		}
		// Ok all good
		Ok(Value::None)
	}
}

impl Display for DefineDatabaseStatement {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		write!(f, "DEFINE DATABASE {}", self.name)?;
		if let Some(ref v) = self.comment {
			write!(f, " COMMENT {v}")?
		}
		if let Some(ref v) = self.changefeed {
			write!(f, " {v}")?;
		}
		Ok(())
	}
}