Struct GeneralViewMetadata 

pub struct GeneralViewMetadata<T>
where
    T: Materialization,
{
    pub view_uuid: Uuid,
    pub format_version: FormatVersion,
    pub location: String,
    pub current_version_id: i64,
    pub versions: HashMap<i64, Version<T>>,
    pub version_log: Vec<VersionLogStruct>,
    pub schemas: HashMap<i32, Schema>,
    pub properties: HashMap<String, String>,
}

Fields for the version 1 of the view metadata.

Fields

view_uuid: Uuid

A UUID that identifies the view, generated when the view is created. Implementations must throw an exception if a view’s UUID does not match the expected UUID after refreshing metadata

format_version: FormatVersion

An integer version number for the view format; must be 1

location: String

The view’s base location. This is used to determine where to store manifest files and view metadata files.

current_version_id: i64

Current version of the view. Set to ‘1’ when the view is first created.

versions: HashMap<i64, Version<T>>

An array of structs describing the last known versions of the view. Controlled by the table property: “version.history.num-entries”. See section Versions.

version_log: Vec<VersionLogStruct>

A list of timestamp and version ID pairs that encodes changes to the current version for the view. Each time the current-version-id is changed, a new entry should be added with the last-updated-ms and the new current-version-id.

schemas: HashMap<i32, Schema>

A list of schemas, the same as the ‘schemas’ field from Iceberg table spec.

properties: HashMap<String, String>

A string to string map of view properties. This is used for metadata such as “comment” and for settings that affect view maintenance. This is not intended to be used for arbitrary metadata.

Implementations

impl GeneralViewMetadata<Identifier>

pub fn as_ref(&self) -> TabularMetadataRef<'_>

impl<T> GeneralViewMetadata<T>

where T: Materialization,

pub fn current_schema(&self, branch: Option<&str>) -> Result<&Schema, Error>

Gets the current schema for a given branch, or the view’s current schema if no branch is specified

Arguments

• branch - Optional branch name to get the schema for

Returns

• Result<&Schema, Error> - The current schema, or an error if the schema cannot be found

pub fn schema(&self, version_id: i64) -> Result<&Schema, Error>

Gets the schema for a specific version ID

Arguments

• version_id - The ID of the version to get the schema for

Returns

• Result<&Schema, Error> - The schema for the version, or an error if the schema cannot be found

pub fn current_version( &self, snapshot_ref: Option<&str>, ) -> Result<&Version<T>, Error>

Gets the current version for a given reference, or the view’s current version if no reference is specified

Arguments

• snapshot_ref - Optional snapshot reference name to get the version for

Returns

• Result<&Version<T>, Error> - The current version, or an error if the version cannot be found

pub fn add_schema(&mut self, schema: Schema)

Adds a new schema to the view metadata

Arguments

• schema - The schema to add

impl GeneralViewMetadata<Option<()>>

pub fn as_ref(&self) -> TabularMetadataRef<'_>

Trait Implementations

impl<T> Clone for GeneralViewMetadata<T>

where T: Clone + Materialization,

fn clone(&self) -> GeneralViewMetadata<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for GeneralViewMetadata<T>

where T: Debug + Materialization,

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

Formats the value using the given formatter.

impl<T> Default for GeneralViewMetadata<T>

where T: Default + Materialization,

fn default() -> GeneralViewMetadata<T>

Returns the “default value” for a type.

impl<'de, T> Deserialize<'de> for GeneralViewMetadata<T>

where T: Materialization + Deserialize<'de>,

fn deserialize<__D>( __deserializer: __D, ) -> Result<GeneralViewMetadata<T>, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for GeneralViewMetadata<Option<()>>

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

Formats the value using the given formatter.

impl<'a> From<&'a GeneralViewMetadata<Identifier>> for TabularMetadataRef<'a>

fn from(value: &'a GeneralViewMetadata<Identifier>) -> TabularMetadataRef<'a>

Converts to this type from the input type.

impl<'a> From<&'a GeneralViewMetadata<Option<()>>> for TabularMetadataRef<'a>

fn from(value: &'a GeneralViewMetadata<Option<()>>) -> TabularMetadataRef<'a>

Converts to this type from the input type.

impl From<GeneralViewMetadata<Identifier>> for TabularMetadata

fn from(value: GeneralViewMetadata<Identifier>) -> TabularMetadata

Converts to this type from the input type.

impl From<GeneralViewMetadata<Option<()>>> for TabularMetadata

fn from(value: GeneralViewMetadata<Option<()>>) -> TabularMetadata

Converts to this type from the input type.

impl<T> From<GeneralViewMetadata<T>> for ViewMetadataV1<T>

where T: Materialization,

fn from(value: GeneralViewMetadata<T>) -> ViewMetadataV1<T>

Converts to this type from the input type.

impl FromStr for GeneralViewMetadata<Option<()>>

type Err = Error

The associated error which can be returned from parsing.

fn from_str( s: &str, ) -> Result<GeneralViewMetadata<Option<()>>, <GeneralViewMetadata<Option<()>> as FromStr>::Err>

Parses a string s to return a value of this type.

impl<T> PartialEq for GeneralViewMetadata<T>

where T: PartialEq + Materialization,

fn eq(&self, other: &GeneralViewMetadata<T>) -> 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<T> Serialize for GeneralViewMetadata<T>

where T: Materialization + Serialize,

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<T> TryFrom<ViewMetadataEnum<T>> for GeneralViewMetadata<T>

where T: Materialization,

type Error = Error

The type returned in the event of a conversion error.

fn try_from( value: ViewMetadataEnum<T>, ) -> Result<GeneralViewMetadata<T>, <GeneralViewMetadata<T> as TryFrom<ViewMetadataEnum<T>>>::Error>

Performs the conversion.

impl<T> TryFrom<ViewMetadataV1<T>> for GeneralViewMetadata<T>

where T: Materialization,

type Error = Error

The type returned in the event of a conversion error.

fn try_from( value: ViewMetadataV1<T>, ) -> Result<GeneralViewMetadata<T>, <GeneralViewMetadata<T> as TryFrom<ViewMetadataV1<T>>>::Error>

Performs the conversion.

impl TryInto<GeneralViewMetadata<Identifier>> for CreateView<Identifier>

type Error = Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<MaterializedViewMetadata, Self::Error>

Performs the conversion.

impl TryInto<GeneralViewMetadata<Option<()>>> for CreateView<Option<()>>

type Error = Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<ViewMetadata, Self::Error>

Performs the conversion.

impl<T> Eq for GeneralViewMetadata<T>

where T: Eq + Materialization,

impl<T> StructuralPartialEq for GeneralViewMetadata<T>

where T: Materialization,