Enum Value

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pub enum Value {
Show 24 variants    Null,
    Boolean(bool),
    UInt8(u8),
    UInt16(u16),
    UInt32(u32),
    UInt64(u64),
    Int8(i8),
    Int16(i16),
    Int32(i32),
    Int64(i64),
    Float32(OrderedF32),
    Float64(OrderedF64),
    Decimal128(Decimal128),
    String(StringBytes),
    Binary(Bytes),
    Date(Date),
    DateTime(DateTime),
    Timestamp(Timestamp),
    Time(Time),
    Duration(Duration),
    IntervalYearMonth(IntervalYearMonth),
    IntervalDayTime(IntervalDayTime),
    IntervalMonthDayNano(IntervalMonthDayNano),
    List(ListValue),
}

Expand description

Value holds a single arbitrary value of any DataType.

Comparison between values with different types (expect Null) is not allowed.

Variants§

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List(ListValue)

Implementations§

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impl Value

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pub fn data_type(&self) -> ConcreteDataType

Returns data type of the value.

§Panics

Panics if the data type is not supported.

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pub fn is_null(&self) -> bool

Returns true if this is a null value.

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pub fn as_list(&self) -> Result<Option<&ListValue>>

Cast itself to ListValue.

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pub fn as_value_ref(&self) -> ValueRef<'_>

Cast itself to ValueRef.

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pub fn as_timestamp(&self) -> Option<Timestamp>

Cast Value to timestamp. Return None if value is not a valid timestamp data type.

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pub fn as_string(&self) -> Option<String>

Cast Value to utf8 String. Return None if value is not a valid string data type.

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pub fn as_date(&self) -> Option<Date>

Cast Value to Date. Return None if value is not a valid date data type.

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pub fn as_datetime(&self) -> Option<DateTime>

Cast Value to DateTime. Return None if value is not a valid datetime data type.

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pub fn as_time(&self) -> Option<Time>

Cast Value to [Time]. Return None if value is not a valid time data type.

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pub fn as_interval_year_month(&self) -> Option<IntervalYearMonth>

Cast Value to [IntervalYearMonth]. Return None if value is not a valid interval year month data type.

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pub fn as_interval_day_time(&self) -> Option<IntervalDayTime>

Cast Value to [IntervalDayTime]. Return None if value is not a valid interval day time data type.

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pub fn as_interval_month_day_nano(&self) -> Option<IntervalMonthDayNano>

Cast Value to [IntervalMonthDayNano]. Return None if value is not a valid interval month day nano data type.

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pub fn as_u64(&self) -> Option<u64>

Cast Value to u64. Return None if value is not a valid uint64 data type.

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pub fn as_f64_lossy(&self) -> Option<f64>

Cast Value to f64. Return None if it’s not castable;

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pub fn logical_type_id(&self) -> LogicalTypeId

Returns the logical type of the value.

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pub fn try_to_scalar_value( &self, output_type: &ConcreteDataType, ) -> Result<ScalarValue>

Convert the value into [ScalarValue] according to the output_type.

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pub fn try_negative(&self) -> Option<Self>

Apply - unary op if possible

Trait Implementations§

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impl Clone for Value

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fn clone(&self) -> Value

Returns a copy of the value. Read more

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

Performs copy-assignment from source. Read more

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impl Debug for Value

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

Formats the value using the given formatter. Read more

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impl<'de> Deserialize<'de> for Value

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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more

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impl Display for Value

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

Formats the value using the given formatter. Read more

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