Method resolve_table_name

src/sql/src/plan/query.rs:6627–6672

Resolves `object` to a table expr, i.e. creating a `Get` or inlining a CTE.

(
        &self,
        object: ResolvedItemName,
    )

    /// Resolves `object` to a table expr, i.e. creating a `Get` or inlining a
    /// CTE.
    pub fn resolve_table_name(
        &self,
        object: ResolvedItemName,
    ) -> Result<(HirRelationExpr, Scope), PlanError> {
        match object {
            ResolvedItemName::Item {
                id,
                full_name,
                version,
                ..
            } => {
                let item = self.scx.get_item(&id).at_version(version);
                let desc = match item.relation_desc() {
                    Some(desc) => desc.clone(),
                    None => {
                        return Err(PlanError::InvalidDependency {
                            name: full_name.to_string(),
                            item_type: item.item_type().to_string(),
                        });
                    }
                };
                let expr = HirRelationExpr::Get {
                    id: Id::Global(item.global_id()),
                    typ: desc.typ().clone(),
                };

                let name = full_name.into();
                let scope = Scope::from_source(Some(name), desc.iter_names().cloned());

                Ok((expr, scope))
            }
            ResolvedItemName::Cte { id, name } => {
                let name = name.into();
                let cte = self.ctes.get(&id).unwrap();
                let expr = HirRelationExpr::Get {
                    id: Id::Local(id),
                    typ: cte.desc.typ().clone(),
                };

                let scope = Scope::from_source(Some(name), cte.desc.iter_names());

                Ok((expr, scope))
            }
            ResolvedItemName::Error => bail_internal!("should have been caught in name resolution"),
        }
    }

    /// The returned String is more detailed when the `postgres_compat` flag is not set. However,
    /// the flag should be set in, e.g., the implementation of the `pg_typeof` function.