Struct DatabaseId 

pub struct DatabaseId(/* private fields */);

Identifies a database within a NodeDB instance.

Every collection lives in exactly one database. Databases are catalog namespaces — the same collection name may appear in two different databases without conflict. Resolution order at session bind time:

1. Explicit database name from the connection string or pgwire startup message (database parameter — set by psql -d <name>).
2. Per-user default database (ALTER USER <name> SET DEFAULT DATABASE <db>).
3. DatabaseId::DEFAULT — the built-in default database.

DatabaseId(0) is permanently reserved for the built-in default database and cannot be dropped. User-created databases are allocated by DatabaseRegistry starting at id 1024.

Access control

Database-level privileges are granted with:

• GRANT ALL ON DATABASE <name> TO <user> — full access
• GRANT CREATE COLLECTION ON DATABASE <name> TO <user> — DDL only
• GRANT SELECT ON DATABASE <name> TO <user> — read-only

Session bind rejects connections to databases not in the user’s accessible_databases set with ACCESS_DENIED (SQLSTATE 42501). Superusers bypass this check.

Implementations

impl DatabaseId

pub const DEFAULT: DatabaseId

The built-in default database. Permanently reserved; cannot be dropped. Zero-fill backward-compatibility with pre-10 WAL records.

pub const fn new(id: u64) -> Self

pub const fn as_u64(self) -> u64

Trait Implementations

impl Archive for DatabaseId

where u64: Archive,

const COPY_OPTIMIZATION: CopyOptimization<Self>

An optimization flag that allows the bytes of this type to be copied directly to a writer instead of calling serialize.

type Archived = ArchivedDatabaseId

The archived representation of this type.

type Resolver = DatabaseIdResolver

The resolver for this type. It must contain all the additional information from serializing needed to make the archived type from the normal type.

fn resolve(&self, resolver: Self::Resolver, out: Place<Self::Archived>)

Creates the archived version of this value at the given position and writes it to the given output.

impl Clone for DatabaseId

fn clone(&self) -> DatabaseId

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DatabaseId

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for DatabaseId

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for DatabaseId

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<__D: Fallible + ?Sized> Deserialize<DatabaseId, __D> for Archived<DatabaseId>

where u64: Archive, <u64 as Archive>::Archived: Deserialize<u64, __D>,

fn deserialize( &self, deserializer: &mut __D, ) -> Result<DatabaseId, <__D as Fallible>::Error>

Deserializes using the given deserializer

impl Display for DatabaseId

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<u64> for DatabaseId

fn from(id: u64) -> Self

Converts to this type from the input type.

impl<'__msgpack_de> FromMessagePack<'__msgpack_de> for DatabaseId

fn read<R: Read<'__msgpack_de>>(reader: &mut R) -> Result<Self, Error>

where Self: Sized,

Reads the MessagePack representation of this value from the provided reader.

impl Hash for DatabaseId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for DatabaseId

fn eq(&self, other: &DatabaseId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<__S: Fallible + ?Sized> Serialize<__S> for DatabaseId

where u64: Serialize<__S>,

fn serialize( &self, serializer: &mut __S, ) -> Result<<Self as Archive>::Resolver, <__S as Fallible>::Error>

Writes the dependencies for the object and returns a resolver that can create the archived type.

impl Serialize for DatabaseId

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ToMessagePack for DatabaseId

fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error>

Writes the MessagePack representation of this value into the provided writer.

impl Copy for DatabaseId

impl Eq for DatabaseId

impl StructuralPartialEq for DatabaseId