FeatherTableReader class

This class enables you to interact with Feather files. Create one to connect to a file or other InputStream, and call Read() on it to make an arrow::Table. See its usage in read_feather().

Factory

The FeatherTableReader$create() factory method instantiates the object and takes the following arguments:

• file A character file name, raw vector, or Arrow file connection object (e.g. RandomAccessFile).

• mmap Logical: whether to memory-map the file (default TRUE)

• ... Additional arguments, currently ignored

Methods

• $GetDescription()

• $HasDescription()

• $version()

• $num_rows()

• $num_columns()

• $GetColumnName()

• $GetColumn()

• $Read(columns)

Super class

arrow::Object -> FeatherTableReader

Methods

Public methods

• FeatherTableReader$GetDescription()

• FeatherTableReader$HasDescription()

• FeatherTableReader$version()

• FeatherTableReader$num_rows()

• FeatherTableReader$num_columns()

• FeatherTableReader$GetColumnName()

• FeatherTableReader$GetColumn()

• FeatherTableReader$Read()

• FeatherTableReader$clone()

Inherited methods

• arrow::Object$initialize()

• arrow::Object$pointer()

• arrow::Object$print()

• arrow::Object$set_pointer()

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Method GetDescription()

Usage

FeatherTableReader$GetDescription()

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Method HasDescription()

Usage

FeatherTableReader$HasDescription()

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Method version()

Usage

FeatherTableReader$version()

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Method num_rows()

Usage

FeatherTableReader$num_rows()

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Method num_columns()

Usage

FeatherTableReader$num_columns()

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Method GetColumnName()

Usage

FeatherTableReader$GetColumnName(i)

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Method GetColumn()

Usage

FeatherTableReader$GetColumn(i)

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Method Read()

Usage

FeatherTableReader$Read(columns)

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Method clone()

The objects of this class are cloneable with this method.

Usage

FeatherTableReader$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.