Enum ConvertedType 

pub enum ConvertedType {
    NONE = -1,
    UTF8 = 0,
    MAP = 1,
    MAP_KEY_VALUE = 2,
    LIST = 3,
    ENUM = 4,
    DECIMAL = 5,
    DATE = 6,
    TIME_MILLIS = 7,
    TIME_MICROS = 8,
    TIMESTAMP_MILLIS = 9,
    TIMESTAMP_MICROS = 10,
    UINT_8 = 11,
    UINT_16 = 12,
    UINT_32 = 13,
    UINT_64 = 14,
    INT_8 = 15,
    INT_16 = 16,
    INT_32 = 17,
    INT_64 = 18,
    JSON = 19,
    BSON = 20,
    INTERVAL = 21,
}

Common types (converted types) used by frameworks when using Parquet.

This helps map between types in those frameworks to the base types in Parquet. This is only metadata and not needed to read or write the data.

This struct was renamed from LogicalType in version 4.0.0. If targeting Parquet format 2.4.0 or above, please use LogicalType instead.

Variants

NONE = -1

Not defined in the spec, used internally to indicate no type conversion

UTF8 = 0

A BYTE_ARRAY actually contains UTF8 encoded chars.

MAP = 1

A map is converted as an optional field containing a repeated key/value pair.

MAP_KEY_VALUE = 2

A key/value pair is converted into a group of two fields.

LIST = 3

A list is converted into an optional field containing a repeated field for its values.

ENUM = 4

An enum is converted into a BYTE_ARRAY field

DECIMAL = 5

A decimal value.

This may be used to annotate BYTE_ARRAY or FIXED_LEN_BYTE_ARRAY primitive types. The underlying byte array stores the unscaled value encoded as two’s complement using big-endian byte order (the most significant byte is the zeroth element). The value of the decimal is the value * 10^{-scale}.

This must be accompanied by a (maximum) precision and a scale in the SchemaElement. The precision specifies the number of digits in the decimal and the scale stores the location of the decimal point. For example 1.23 would have precision 3 (3 total digits) and scale 2 (the decimal point is 2 digits over).

DATE = 6

A date stored as days since Unix epoch, encoded as the INT32 physical type.

TIME_MILLIS = 7

The total number of milliseconds since midnight. The value is stored as an INT32 physical type.

TIME_MICROS = 8

The total number of microseconds since midnight. The value is stored as an INT64 physical type.

TIMESTAMP_MILLIS = 9

Date and time recorded as milliseconds since the Unix epoch. Recorded as a physical type of INT64.

TIMESTAMP_MICROS = 10

Date and time recorded as microseconds since the Unix epoch. The value is stored as an INT64 physical type.

UINT_8 = 11

An unsigned 8 bit integer value stored as INT32 physical type.

UINT_16 = 12

An unsigned 16 bit integer value stored as INT32 physical type.

UINT_32 = 13

An unsigned 32 bit integer value stored as INT32 physical type.

UINT_64 = 14

An unsigned 64 bit integer value stored as INT64 physical type.

INT_8 = 15

A signed 8 bit integer value stored as INT32 physical type.

INT_16 = 16

A signed 16 bit integer value stored as INT32 physical type.

INT_32 = 17

A signed 32 bit integer value stored as INT32 physical type.

INT_64 = 18

A signed 64 bit integer value stored as INT64 physical type.

JSON = 19

A JSON document embedded within a single UTF8 column.

BSON = 20

A BSON document embedded within a single BINARY column.

INTERVAL = 21

An interval of time

This type annotates data stored as a FIXED_LEN_BYTE_ARRAY of length 12. This data is composed of three separate little endian unsigned integers. Each stores a component of a duration of time. The first integer identifies the number of months associated with the duration, the second identifies the number of days associated with the duration and the third identifies the number of milliseconds associated with the provided duration. This duration of time is independent of any particular timezone or date.

Implementations

impl ConvertedType

pub const VARIANTS: &'static [Self]

Returns a slice containing every variant of this enum.

pub const MAX_DISCRIMINANT: i32 = 21i32

Returns the largest discriminant value defined for this enum.

const fn max_discriminant_impl() -> i32

Trait Implementations

impl Clone for ConvertedType

fn clone(&self) -> ConvertedType

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ConvertedType

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

Formats the value using the given formatter.

impl Display for ConvertedType

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

Formats the value using the given formatter.

impl From<Option<LogicalType>> for ConvertedType

fn from(value: Option<LogicalType>) -> Self

Converts to this type from the input type.

impl FromStr for ConvertedType

type Err = ParquetError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self>

Parses a string s to return a value of this type.

impl Hash for ConvertedType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ConvertedType

fn cmp(&self, other: &ConvertedType) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ConvertedType

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for ConvertedType

fn partial_cmp(&self, other: &ConvertedType) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'a, R: ThriftCompactInputProtocol<'a>> ReadThrift<'a, R> for ConvertedType

fn read_thrift(prot: &mut R) -> Result<Self>

Read an object of type Self from the input protocol object.

impl WriteThrift for ConvertedType

const ELEMENT_TYPE: ElementType = ElementType::I32

The ElementType to use when a list of this object is written.

fn write_thrift<W: Write>( &self, writer: &mut ThriftCompactOutputProtocol<W>, ) -> Result<()>

Serialize this object to the given writer.

impl WriteThriftField for ConvertedType

fn write_thrift_field<W: Write>( &self, writer: &mut ThriftCompactOutputProtocol<W>, field_id: i16, last_field_id: i16, ) -> Result<i16>

Used to write struct fields (which may be primitive or IDL defined types). This will write the field marker for the given field_id, using last_field_id to compute the field delta used by the Thrift compact protocol. On success this will return field_id to be used in chaining.

impl Copy for ConvertedType

impl Eq for ConvertedType

impl StructuralPartialEq for ConvertedType