Module types

ToSql and FromSql are also implemented for Option<T> where T implements ToSql or FromSql for the cases where you want to know if a value was NULL (which gets translated to None).

Structs

DuckString

Wrapper for underlying duck string type with a lifetime bound to a &mut duckdb_string_t

Null

Empty struct that can be used to fill in a query parameter as NULL.

OrderedMap

An ordered map of key-value pairs.

Enums

EnumType

Wrapper type for different enum sizes

FromSqlError

Enum listing possible errors from FromSql trait.

ListType

Wrapper type for different list sizes

TimeUnit

An absolute length of time in seconds, milliseconds, microseconds or nanoseconds. Copy from arrow::datatypes::TimeUnit

ToSqlOutput

ToSqlOutput represents the possible output types for implementers of the ToSql trait.

Type

DuckDB data types. See Fundamental Datatypes.

Value

Owning dynamic type value. Value’s type is typically dictated by DuckDB (not by the caller).

ValueRef

A non-owning static type value. Typically the memory backing this value is owned by SQLite.

Traits

FromSql

A trait for types that can be created from a DuckDB value.

ToSql

A trait for types that can be converted into DuckDB values. Returns [Error::ToSqlConversionFailure] if the conversion fails.

Type Aliases

FromSqlResult

Result type for implementors of the FromSql trait.