Trait mentat_core::SQLValueType [−] [src]

pub trait SQLValueType {
    fn value_type_tag(&self) -> ValueTypeTag;
    fn accommodates_integer(&self, int: i64) -> bool;
    fn sql_representation(&self) -> (ValueTypeTag, Option<SQLTypeAffinity>);
}

Required Methods

`fn value_type_tag(&self) -> ValueTypeTag`

`fn accommodates_integer(&self, int: i64) -> bool`

`fn sql_representation(&self) -> (ValueTypeTag, Option<SQLTypeAffinity>)`

Return a pair of the ValueTypeTag for this value type, and the SQLTypeAffinity required to distinguish it from any other types that share the same tag.

Background: The tag alone is not enough to determine the type of a value, since multiple ValueTypes may share the same tag (for example, ValueType::Long and ValueType::Double). However, each ValueType can be determined by checking both the tag and the type's affinity.

Implementors

impl SQLValueType for ValueType
[src]