pub enum LogicalType {
NONE,
UTF8,
MAP,
MAP_KEY_VALUE,
LIST,
ENUM,
DECIMAL,
DATE,
TIME_MILLIS,
TIME_MICROS,
TIMESTAMP_MILLIS,
TIMESTAMP_MICROS,
UINT_8,
UINT_16,
UINT_32,
UINT_64,
INT_8,
INT_16,
INT_32,
INT_64,
JSON,
BSON,
INTERVAL,
}
Common types (logical 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.
A BYTE_ARRAY actually contains UTF8 encoded chars.
A map is converted as an optional field containing a repeated key/value pair.
A key/value pair is converted into a group of two fields.
A list is converted into an optional field containing a repeated field for its
values.
An enum is converted into a binary field
A decimal value.
This may be used to annotate binary or fixed 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).
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).
A date stored as days since Unix epoch, encoded as the INT32 physical type.
The total number of milliseconds since midnight. The value is stored as an INT32
physical type.
The total number of microseconds since midnight. The value is stored as an INT64
physical type.
Date and time recorded as milliseconds since the Unix epoch.
Recorded as a physical type of INT64.
Date and time recorded as microseconds since the Unix epoch.
The value is stored as an INT64 physical type.
An unsigned 8 bit integer value stored as INT32 physical type.
An unsigned 16 bit integer value stored as INT32 physical type.
An unsigned 32 bit integer value stored as INT32 physical type.
An unsigned 64 bit integer value stored as INT64 physical type.
A signed 8 bit integer value stored as INT32 physical type.
A signed 16 bit integer value stored as INT32 physical type.
A signed 32 bit integer value stored as INT32 physical type.
A signed 64 bit integer value stored as INT64 physical type.
A JSON document embedded within a single UTF8 column.
A BSON document embedded within a single BINARY column.
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.
This method tests for self
and other
values to be equal, and is used by ==
. Read more
This method tests for !=
.
Performs copy-assignment from source
. Read more
Formats the value using the given formatter. Read more
Formats the value using the given formatter. Read more
The associated error which can be returned from parsing.
Parses a string s
to return a value of this type. Read more
Converts the given value to a String
. Read more
Creates owned data from borrowed data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
Immutably borrows from an owned value. Read more
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
Mutably borrows from an owned value. Read more
🔬 This is a nightly-only experimental API. (rustc_private
)
this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
instead?
Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S
is the encoder/decoder state type, T
is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more
impl<'a, T> TryFrom for T where T: FromStr, | |
impl<T, U> TryInto for T where U: TryFrom<T>, | |
type Err = <U as TryFrom<T>>::Err