Enum MetadataCacheMode 

#[non_exhaustive]
pub enum MetadataCacheMode {
    Unspecified,
    Automatic,
    Manual,
    UnknownValue(UnknownValue),
}

MetadataCacheMode identifies if the table should use metadata caching for files from external source (eg Google Cloud Storage).

Working with unknown values

This enum is defined as #[non_exhaustive] because Google Cloud may add additional enum variants at any time. Adding new variants is not considered a breaking change. Applications should write their code in anticipation of:

• New values appearing in future releases of the client library, and
• New values received dynamically, without application changes.

Please consult the Working with enums section in the user guide for some guidelines.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Unspecified

Unspecified metadata cache mode.

Automatic

Set this mode to trigger automatic background refresh of metadata cache from the external source. Queries will use the latest available cache version within the table’s maxStaleness interval.

Manual

Set this mode to enable triggering manual refresh of the metadata cache from external source. Queries will use the latest manually triggered cache version within the table’s maxStaleness interval.

UnknownValue(UnknownValue)

If set, the enum was initialized with an unknown value.

Applications can examine the value using MetadataCacheMode::value or MetadataCacheMode::name.

Implementations

impl MetadataCacheMode

pub fn value(&self) -> Option<i32>

Gets the enum value.

Returns None if the enum contains an unknown value deserialized from the string representation of enums.

pub fn name(&self) -> Option<&str>

Gets the enum value as a string.

Returns None if the enum contains an unknown value deserialized from the integer representation of enums.

Trait Implementations

impl Clone for MetadataCacheMode

fn clone(&self) -> MetadataCacheMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetadataCacheMode

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

Formats the value using the given formatter.

impl Default for MetadataCacheMode

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MetadataCacheMode

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for MetadataCacheMode

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

Formats the value using the given formatter.

impl From<&str> for MetadataCacheMode

fn from(value: &str) -> Self

Converts to this type from the input type.

impl From<i32> for MetadataCacheMode

fn from(value: i32) -> Self

Converts to this type from the input type.

impl PartialEq for MetadataCacheMode

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for MetadataCacheMode

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MetadataCacheMode