use std::borrow::Cow;
use std::ops::Deref;
use anyhow::Result;
use reblessive::tree::Stk;
use crate::catalog::providers::DatabaseProvider;
use crate::ctx::FrozenContext;
use crate::dbs::Options;
use crate::doc::CursorDoc;
use crate::exe::FlowResultExt;
use crate::expr::Base;
use crate::expr::statements::alter::AlterKind;
use crate::expr::statements::alter::param::AlterParamStatement;
use crate::iam::{Action, ResourceKind};
use crate::key::schema::ParamKey;
use crate::val::Value;
#[instrument(level = "trace", name = "AlterParamStatement::compute", skip_all)]
pub(crate) async fn alter_param_statement_compute(
this: &AlterParamStatement,
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, &this.name, None).await {
Ok(v) => v.deref().clone(),
Err(e) => {
if this.if_exists {
return Ok(Value::None);
}
return Err(e);
}
};
if let Some(ref v) = this.value {
pa.value = stk
.run(|stk| crate::legacy::expr_compute(v, stk, ctx, opt, doc))
.await
.catch_return()?;
}
match this.comment {
AlterKind::Set(ref v) => pa.comment = Some(v.clone()),
AlterKind::Drop => pa.comment = None,
AlterKind::None => {}
}
if let Some(ref p) = this.permissions {
pa.permissions = p.clone();
}
let key = ParamKey {
ns,
db,
pa: Cow::Borrowed(&this.name),
};
txn.set_key(&key, &pa.to_stored()).await?;
txn.clear_cache();
Ok(Value::None)
}