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record_batch() 从一个或多个列构建 RecordBatch 时,as_record_batch() 将单个对象转换为 Arrow RecordBatch

用法

as_record_batch(x, ..., schema = NULL)

# S3 method for class 'RecordBatch'
as_record_batch(x, ..., schema = NULL)

# S3 method for class 'Table'
as_record_batch(x, ..., schema = NULL)

# S3 method for class 'arrow_dplyr_query'
as_record_batch(x, ...)

# S3 method for class 'data.frame'
as_record_batch(x, ..., schema = NULL)

参数

x

要转换为 Arrow RecordBatch 的对象

...

传递给 S3 方法

schema

一个 Schema,或 NULL(默认值)以从 ... 中的数据推断模式。当提供 Arrow IPC 缓冲区时,需要 schema

一个 RecordBatch

示例

# use as_record_batch() for a single object
as_record_batch(data.frame(col1 = 1, col2 = "two"))
#> RecordBatch
#> 1 rows x 2 columns
#> $col1 <double>
#> $col2 <string>
#> 
#> See $metadata for additional Schema metadata

# use record_batch() to create from columns
record_batch(col1 = 1, col2 = "two")
#> RecordBatch
#> 1 rows x 2 columns
#> $col1 <double>
#> $col2 <string>