Module diesel::sql_types

Types which represent a SQL data type.

The structs in this module are only used as markers to represent a SQL type. They should never be used in your structs. If you’d like to know the rust types which can be used for a given SQL type, see the documentation for that SQL type. Additional types may be provided by other crates.

To see which SQL type can be used with a given Rust type, see the “Implementors” section of FromSql.

Any backend specific types are re-exported through this module

Modules

is_nullable

Possible values for SqlType::IsNullable

ops

Represents the output of numeric operators in SQL

Structs

BigInt

The big integer SQL type.

Binary

The binary SQL type.

Bool

The boolean SQL type.

Date

The date SQL type.

Double

The double precision float SQL type.

Float

The float SQL type.

Integer

The integer SQL type.

Interval

The interval SQL type.

Json

The JSON SQL type. This type can only be used with feature = "serde_json"

Nullable

The nullable SQL type.

Numeric

The arbitrary precision numeric SQL type.

SmallInt

The small integer SQL type.

Text

The text SQL type.

Time

The time SQL type.

Timestamp

The timestamp SQL type.

TinyInt

The tiny integer SQL type.

Untyped

Query nodes with this expression type do not have a statically at compile time known expression type.

Traits

AllAreNullable

Are both values of IsNull are nullable?

BoolOrNullableBool

A marker trait for accepting expressions of the type Bool and Nullable<Bool> in the same place

Foldable

Represents SQL types which can be used with SUM and AVG

HasSqlType

Indicates that a SQL type exists for a backend.

IntoNotNullable

Converts a type which may or may not be nullable into its not nullable representation.

IntoNullable

Converts a type which may or may not be nullable into its nullable representation.

MaybeNullableType

A type level constructor for maybe nullable types

OneIsNullable

Is one value of IsNull nullable?

SingleValue

A marker trait indicating that a SQL type represents a single value, as opposed to a list of values.

SqlOrd

Marker trait for types which can be used with MAX and MIN

SqlType

A marker trait for SQL types

TypeMetadata

Information about how a backend stores metadata about given SQL types

Type Definitions

Decimal

Alias for Numeric

VarChar

The SQL VARCHAR type

Derive Macros

DieselNumericOps

Implement numeric operators for the current query node

SqlType

Implement necessary traits for adding a new sql type