Module transaction 

SQL transactions

A transaction encapsulates all the mutable functionality provided by the SQL database, and allows for mutable operations to be combined into complex updates that affect the main database atomically. A transaction also provides all the immutable query functionality of a regular database connection, so that the updated state of the database can be queried midway through a transaction.

Macros

impl_tuple_params 🔒

Structs

PoolMetrics 🔒

Prune

Marker type indicating a transaction used for pruning deletes.

Read

Marker type indicating a transaction with read-only access to the database.

Transaction

An atomic SQL transaction.

TransactionMetricsGuard 🔒

Write

Marker type indicating a transaction with read-write access to the database.

Enums

CloseType 🔒

Statics

NO_DEFERRABLE_ON_READ 🔒

When set to true, read transactions begin with SET TRANSACTION ISOLATION LEVEL SERIALIZABLE, READ ONLY (no DEFERRABLE), so they start immediately instead of waiting for a safe serializable snapshot.

Traits

Executor

A type that contains or can provide a database connection to use for executing queries against the database.

FixedLengthParams

A collection of parameters with a statically known length.

Params

A collection of parameters which can be bound to a SQL query.

TransactionMode

Trait for marker types indicating what type of access a transaction has to the database.

Functions

build_where_in

query

query_as

set_no_deferrable_on_read

Configure whether read transactions on Postgres should omit DEFERRABLE.

Type Aliases

Query

QueryAs