Struct ParquetReadOptions 

pub struct ParquetReadOptions {
    pub columns: Option<Vec<String>>,
}

Parquet read options: the same parquet: block as the object-store sources. Parquet reader options (the parquet: block of an object-store source).

Fields

columns: Option<Vec<String>>

Decode only these top-level columns. A name missing from an object is an error naming the object and its columns. Unset: every column.

Implementations

impl ParquetReadOptions

pub fn validate(&self) -> Result<(), FaucetError>

Refuse options that would silently read nothing: an empty columns list (it projects no column, so every record would be empty) or a blank column name. Sources call this at construction.

Trait Implementations

impl Clone for ParquetReadOptions

fn clone(&self) -> ParquetReadOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParquetReadOptions

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

Formats the value using the given formatter.

impl Default for ParquetReadOptions

fn default() -> ParquetReadOptions

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ParquetReadOptions

fn deserialize<__D>( __deserializer: __D, ) -> Result<ParquetReadOptions, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ParquetReadOptions

impl JsonSchema for ParquetReadOptions

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for ParquetReadOptions

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ParquetReadOptions

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 StructuralPartialEq for ParquetReadOptions