use std::ops::Deref;
use anyhow::Result;
use reblessive::tree::Stk;
use surrealdb_strand::Strand;
use surrealdb_types::{SqlFormat, ToSql};
use super::AlterKind;
use crate::catalog::Permission;
use crate::catalog::providers::DatabaseProvider;
use crate::ctx::FrozenContext;
use crate::dbs::Options;
use crate::doc::CursorDoc;
use crate::expr::{Base, Expr, FlowResultExt};
use crate::iam::{Action, ResourceKind};
use crate::val::Value;
#[derive(Clone, Debug, Default, Eq, PartialEq, Hash)]
pub(crate) struct AlterParamStatement {
pub name: Strand,
pub if_exists: bool,
pub value: Option<Expr>,
pub comment: AlterKind<String>,
pub permissions: Option<Permission>,
}
impl AlterParamStatement {
#[instrument(level = "trace", name = "AlterParamStatement::compute", skip_all)]
pub(crate) async fn compute(
&self,
stk: &mut Stk,
ctx: &FrozenContext,
opt: &Options,
doc: Option<&CursorDoc>,
) -> Result<Value> {
ctx.is_allowed(opt, Action::Edit, ResourceKind::Parameter, Base::Db)?;
let (_, _) = opt.ns_db()?;
let (ns, db) = ctx.expect_ns_db_ids(opt).await?;
let txn = ctx.tx();
let mut pa = match txn.get_db_param(ns, db, &self.name, None).await {
Ok(v) => v.deref().clone(),
Err(e) => {
if self.if_exists {
return Ok(Value::None);
}
return Err(e);
}
};
if let Some(ref v) = self.value {
pa.value = stk.run(|stk| v.compute(stk, ctx, opt, doc)).await.catch_return()?;
}
match self.comment {
AlterKind::Set(ref v) => pa.comment = Some(v.clone()),
AlterKind::Drop => pa.comment = None,
AlterKind::None => {}
}
if let Some(ref p) = self.permissions {
pa.permissions = p.clone();
}
let key = crate::key::database::pa::new(ns, db, &self.name);
txn.set(&key, &pa).await?;
txn.clear_cache();
Ok(Value::None)
}
}
impl ToSql for AlterParamStatement {
fn fmt_sql(&self, f: &mut String, fmt: SqlFormat) {
let stmt: crate::sql::statements::alter::AlterParamStatement = self.clone().into();
stmt.fmt_sql(f, fmt);
}
}