Struct diesel::pg::PgTypeMetadata

source ·
pub struct PgTypeMetadata(_);
Available on crate feature postgres_backend only.
Expand description

The OIDs for a SQL type

Implementations§

Create a new instance of this type based on known constant OIDs.

Please refer to PgMetadataLookup for a way to query OIDs of custom types at run time

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Create a new instance of this type based on dynamically lookup informations

This function is useful for third party crates that may implement a custom postgres connection type and want to bring their own lookup mechanism.

Otherwise refer to PgMetadataLookup for a way to automatically implement the corresponding lookup functionality

The OID of T

The OID of T[]

Trait Implementations§

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
Feeds this value into the given Hasher. Read more
Feeds a slice of this type into the given Hasher. Read more
This method tests for self and other values to be equal, and is used by ==.
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Convert self to an expression for Diesel’s query builder. Read more
Convert &self to an expression for Diesel’s query builder. Read more
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.