Apache Arrow data types
These functions create type objects corresponding to Arrow types. Use them
when defining a schema() or as inputs to other types, like struct. Most
of these functions don't take arguments, but a few do.
int8()
int16()
int32()
int64()
uint8()
uint16()
uint32()
uint64()
float16()
halffloat()
float32()
float()
float64()
boolean()
bool()
utf8()
large_utf8()
binary()
large_binary()
fixed_size_binary(byte_width)
string()
date32()
date64()
time32(unit = c("ms", "s"))
time64(unit = c("ns", "us"))
null()
timestamp(unit = c("s", "ms", "us", "ns"), timezone = "")
decimal(precision, scale)
struct(...)
list_of(type)
large_list_of(type)
fixed_size_list_of(type, list_size)byte_width |
byte width for |
unit |
For time/timestamp types, the time unit. |
timezone |
For |
precision |
For |
scale |
For |
... |
For |
type |
For |
list_size |
list size for |
A few functions have aliases:
utf8() and string()
float16() and halffloat()
float32() and float()
bool() and boolean()
When called inside an arrow function, such as schema() or cast(),
double() also is supported as a way of creating a float64()
date32() creates a datetime type with a "day" unit, like the R Date
class. date64() has a "ms" unit.
uint32 (32 bit unsigned integer), uint64 (64 bit unsigned integer), and
int64 (64-bit signed integer) types may contain values that exceed the
range of R's integer type (32-bit signed integer). When these arrow objects
are translated to R objects, uint32 and uint64 are converted to double
("numeric") and int64 is converted to bit64::integer64. For int64
types, this conversion can be disabled (so that int64 always yields a
bit64::integer64 object) by setting options(arrow.int64_downcast = FALSE).
An Arrow type object inheriting from DataType.
dictionary() for creating a dictionary (factor-like) type.
bool()
struct(a = int32(), b = double())
timestamp("ms", timezone = "CEST")
time64("ns")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.