#include <userver/storages/postgres/options.hpp>

Detailed Description

PostgreSQL transaction options.

A transaction can be started using all isolation levels and modes supported by PostgreSQL server as specified in it's documentation.

Default isolation level is READ COMMITTED, default mode is READ WRITE.

// Read-write read committed transaction.

TransactionOptions opts;

Transaction class provides constants Transaction::RW, Transaction::RO and Transaction::Deferrable for convenience.

Other variants can be created with TransactionOptions constructors that are constexpr.

See also: https://www.postgresql.org/docs/current/static/sql-set-transaction.html

Examples: postgresql/functional_tests/basic_chaos/postgres_service.cpp.

Definition at line 53 of file options.hpp.

Public Types
enum	Mode { kReadWrite = 0 , kReadOnly = 1 , kDeferrable = 3 }

Public Member Functions
constexpr	TransactionOptions (IsolationLevel lvl)

constexpr	TransactionOptions (IsolationLevel lvl, Mode m)

constexpr	TransactionOptions (Mode m)

bool	IsReadOnly () const

Static Public Member Functions
static constexpr TransactionOptions	Deferrable ()

Public Attributes
IsolationLevel	isolation_level = IsolationLevel::kReadCommitted

Mode	mode = kReadWrite

Member Enumeration Documentation

◆ Mode

enum storages::postgres::TransactionOptions::Mode

[Transaction modes]

Enumerator
kDeferrable	Deferrable transaction is read only.

Definition at line 55 of file options.hpp.

Constructor & Destructor Documentation

◆ TransactionOptions() [1/3]

constexpr storages::postgres::TransactionOptions::TransactionOptions ( IsolationLevel lvl )

inlineexplicitconstexpr

Definition at line 65 of file options.hpp.

◆ TransactionOptions() [2/3]

constexpr storages::postgres::TransactionOptions::TransactionOptions	(	IsolationLevel	lvl,
		Mode	m )

inlineconstexpr

Definition at line 66 of file options.hpp.

◆ TransactionOptions() [3/3]

constexpr storages::postgres::TransactionOptions::TransactionOptions ( Mode m )

inlineexplicitconstexpr

Definition at line 67 of file options.hpp.

Member Function Documentation

◆ Deferrable()

static constexpr TransactionOptions storages::postgres::TransactionOptions::Deferrable ( )

inlinestaticconstexpr

The deferrable property has effect only if the transaction is also serializable and read only

Definition at line 73 of file options.hpp.

◆ IsReadOnly()

bool storages::postgres::TransactionOptions::IsReadOnly ( ) const

inline

Definition at line 69 of file options.hpp.

Member Data Documentation

◆ isolation_level

IsolationLevel storages::postgres::TransactionOptions::isolation_level = IsolationLevel::kReadCommitted

[Transaction modes]

Definition at line 61 of file options.hpp.

◆ mode

Mode storages::postgres::TransactionOptions::mode = kReadWrite

Definition at line 62 of file options.hpp.

The documentation for this struct was generated from the following file:

userver/storages/postgres/options.hpp