mz_persist_types::codec_impls

Struct UnitSchema

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pub struct UnitSchema;
Expand description

An implementation of Schema for [()].

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impl Debug for UnitSchema

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

Formats the value using the given formatter. Read more
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impl Default for UnitSchema

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fn default() -> UnitSchema

Returns the “default value” for a type. Read more
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impl PartialEq for UnitSchema

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Schema<()> for UnitSchema

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type ArrowColumn = NullArray

The type of column we decode from, and encoder will finish into.
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type Statistics = NoneStats

Statistics we collect for a schema of this type.
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type Decoder = UnitColumnar

Type that is able to decode values of T from Self::ArrowColumn.
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type Encoder = UnitColumnar

Type that is able to encoder values of T.
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fn decoder(&self, col: Self::ArrowColumn) -> Result<Self::Decoder, Error>

Returns a type that is able to decode instances of T from the provider column.
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fn encoder(&self) -> Result<Self::Encoder, Error>

Returns a type that can encode values of T.
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fn decoder_any(&self, col: &dyn Array) -> Result<Self::Decoder, Error>

Returns a type that is able to decode instances of T from a type erased arrow::array::Array, erroring if the provided array is not Self::ArrowColumn.
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impl StructuralPartialEq for UnitSchema

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