mz_arrow_util::builder

Enum ColBuilder

Source 
enum ColBuilder {

Show 21 variants    BooleanBuilder(BooleanBuilder),
    Int16Builder(Int16Builder),
    Int32Builder(Int32Builder),
    Int64Builder(Int64Builder),
    UInt8Builder(UInt8Builder),
    UInt16Builder(UInt16Builder),
    UInt32Builder(UInt32Builder),
    UInt64Builder(UInt64Builder),
    Float32Builder(Float32Builder),
    Float64Builder(Float64Builder),
    Date32Builder(Date32Builder),
    Time64MicrosecondBuilder(Time64MicrosecondBuilder),
    TimestampMicrosecondBuilder(TimestampMicrosecondBuilder),
    LargeBinaryBuilder(LargeBinaryBuilder),
    FixedSizeBinaryBuilder(FixedSizeBinaryBuilder),
    StringBuilder(StringBuilder),
    LargeStringBuilder(LargeStringBuilder),
    Decimal128Builder(Decimal128Builder),
    ListBuilder(Box<ListBuilder<ArrowColumn>>),
    MapBuilder(Box<MapBuilder<StringBuilder, ArrowColumn>>),
    StructBuilder(StructBuilder),

}
Expand description

An enum wrapper for all arrow builder types that we support. Used to store a builder for each column and avoid dynamic dispatch and downcasting when appending data.

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BooleanBuilder(BooleanBuilder)

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Int16Builder(Int16Builder)

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Int32Builder(Int32Builder)

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Int64Builder(Int64Builder)

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UInt8Builder(UInt8Builder)

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UInt16Builder(UInt16Builder)

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UInt32Builder(UInt32Builder)

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UInt64Builder(UInt64Builder)

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Float32Builder(Float32Builder)

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Float64Builder(Float64Builder)

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Date32Builder(Date32Builder)

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Time64MicrosecondBuilder(Time64MicrosecondBuilder)

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TimestampMicrosecondBuilder(TimestampMicrosecondBuilder)

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LargeBinaryBuilder(LargeBinaryBuilder)

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FixedSizeBinaryBuilder(FixedSizeBinaryBuilder)

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StringBuilder(StringBuilder)

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LargeStringBuilder(LargeStringBuilder)

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Decimal128Builder(Decimal128Builder)

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ListBuilder(Box<ListBuilder<ArrowColumn>>)

ListBuilder & MapBuilder are handled separately than other builder types since they uses generic parameters for the inner types, and are boxed to avoid recursive type definitions.

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MapBuilder(Box<MapBuilder<StringBuilder, ArrowColumn>>)

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StructBuilder(StructBuilder)

StructBuilder is handled separately since its append_null() method must be overriden to both append nulls to all field builders and to append a null to the struct. It’s unclear why arrow-rs implemented this differently than ListBuilder and MapBuilder.

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Trait Implementations§

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impl Debug for ColBuilder

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

Formats the value using the given formatter. Read more

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