Enum proof_of_sql::base::database::ColumnType

pub enum ColumnType {
    Boolean,
    SmallInt,
    Int,
    BigInt,
    Int128,
    VarChar,
    Decimal75(Precision, i8),
    TimestampTZ(PoSQLTimeUnit, PoSQLTimeZone),
    Scalar,
}

Represents the supported data types of a column in an in-memory, column-oriented database.

See <https://ignite.apache.org/docs/latest/sql-reference/data-types> for a description of the native types used by Apache Ignite.

Variants

Boolean

Mapped to bool

SmallInt

Mapped to i16

Int

Mapped to i32

BigInt

Mapped to i64

Int128

Mapped to i128

VarChar

Mapped to String

Decimal75(Precision, i8)

Mapped to i256

TimestampTZ(PoSQLTimeUnit, PoSQLTimeZone)

Mapped to i64

Scalar

Mapped to Curve25519Scalar

Implementations

impl ColumnType

pub fn is_numeric(&self) -> bool

Returns true if this column is numeric and false otherwise

pub fn is_integer(&self) -> bool

Returns true if this column is an integer and false otherwise

pub fn max_integer_type(&self, other: &Self) -> Option<Self>

Returns the larger integer type of two ColumnTypes if they are both integers.

If either of the columns is not an integer, return None.

pub fn precision_value(&self) -> Option<u8>

Returns the precision of a ColumnType if it is converted to a decimal wrapped in Some(). If it can not be converted to a decimal, return None.

pub fn scale(&self) -> Option<i8>

Returns scale of a ColumnType if it is convertible to a decimal wrapped in Some(). Otherwise return None.

Trait Implementations

impl Clone for ColumnType

fn clone(&self) -> ColumnType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnType

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ColumnType

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ColumnType

Display the column type as a str name (in all caps)

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

Formats the value using the given formatter.

impl From<&ColumnType> for DataType

Convert ColumnType values to some arrow DataType

fn from(column_type: &ColumnType) -> Self

Converts to this type from the input type.

impl Hash for ColumnType

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 PartialEq for ColumnType

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for ColumnType

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<DataType> for ColumnType

Convert arrow DataType values to some ColumnType

type Error = String

The type returned in the event of a conversion error.

fn try_from(data_type: DataType) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for ColumnType

impl Eq for ColumnType

impl StructuralPartialEq for ColumnType