Module diesel::pg

source · [−]
Available on crate feature postgres_backend only.
Expand description

Provides types and functions related to working with PostgreSQL

Much of this module is re-exported from database agnostic locations. However, if you are writing code specifically to extend Diesel on PostgreSQL, you may need to work with this module directly.

Modules

data_types
Data structures for PG types which have no corresponding Rust type
expression
PostgreSQL related query builder extensions
sql_types
PostgreSQL specific SQL types

Structs

DistinctOnClause
Represents DISTINCT ON (...)
FailedToLookupTypeErrori-implement-a-third-party-backend-and-opt-into-breaking-changes
This error indicates that a type lookup for a custom postgres type failed
Pg
The PostgreSQL backend
PgConnectionpostgres
The connection string expected by PgConnection::establish should be a PostgreSQL connection string, as documented at https://www.postgresql.org/docs/9.4/static/libpq-connect.html#LIBPQ-CONNSTRING
PgMetadataCachei-implement-a-third-party-backend-and-opt-into-breaking-changes
Cache for the OIDs of custom Postgres types
PgMetadataCacheKeyi-implement-a-third-party-backend-and-opt-into-breaking-changes
The key used to lookup cached type oid’s inside of a PgMetadataCache.
PgQueryBuilder
The PostgreSQL query builder
PgRowByRowLoadingModepostgres
A PgConnection specific loading mode to load rows one by one
PgTypeMetadata
The OIDs for a SQL type
PgValue
Raw postgres value as received from the database
TransactionBuilder
Used to build a transaction, specifying additional details.

Traits

GetPgMetadataCachei-implement-a-third-party-backend-and-opt-into-breaking-changes
Gets the PgMetadataCache for a Connection<Backend=Pg> so that the lookup of user defined types, or types which come from an extension can be cached.
PgMetadataLookup
Determines the OID of types at runtime
TypeOidLookupi-implement-a-third-party-backend-and-opt-into-breaking-changes
This is a helper trait to defer a type oid lookup to a later point in time