Trait diesel::sql_types::TypeMetadata[−][src]

pub trait TypeMetadata {
    type TypeMetadata;
    type MetadataLookup;
}

Information about how a backend stores metadata about given SQL types

Associated Types

type TypeMetadata[src]

The actual type used to represent metadata.

On PostgreSQL, this is the type’s OID. On MySQL and SQLite, this is an enum representing all storage classes they support.

type MetadataLookup[src]

The type used for runtime lookup of metadata.

For most backends, which don’t support user defined types, this will be ().

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Implementors

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