sql

package
v0.9.1 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Apr 4, 2024 License: MPL-2.0 Imports: 28 Imported by: 0

Documentation

Overview

Package sql implements persistent storage using the postgres database.

Index

Constants

View Source 
const (
	InsertAction = "INSERT"
	UpdateAction = "UPDATE"
	DeleteAction = "DELETE"
)
View Source 
const TestDatabaseURL = "OTF_TEST_DATABASE_URL"

Variables

View Source 
var ErrSubscriptionTerminated = errors.New("broker terminated the subscription")

ErrSubscriptionTerminated is for use by subscribers to indicate that their subscription has been terminated by the broker.

Functions

func Bool 

func Bool(b bool) pgtype.Bool

Bool converts a go-boolean into a postgres non-null boolean

func BoolPtr 

func BoolPtr(s *bool) pgtype.Bool

BoolPtr converts a go-boolean pointer into a postgres nullable boolean

func Error 

func Error(err error) error

func Inet 

func Inet(ip net.IP) pgtype.Inet

Inet converts net.IP into the postgres type pgtype.Inet

func Int4 

func Int4(s int) pgtype.Int4

Int4 converts a go-int into a postgres non-null int4

func Int4Ptr 

func Int4Ptr(s *int) pgtype.Int4

Int4Ptr converts a go-int pointer into a postgres nullable int4

func Int8 

func Int8(s int) pgtype.Int8

Int8 converts a go-int into a postgres non-null int8

func Int8Ptr 

func Int8Ptr(s *int) pgtype.Int8

Int8Ptr converts a go-int pointer into a postgres nullable int8

func JSON 

func JSON(b []byte) pgtype.JSON

JSON converts a []byte into a postgres JSON type

func NewTestDB 

func NewTestDB(t *testing.T) string

NewTestDB creates a logical database in postgres for a test and returns a connection string for connecting to the database. The database is dropped upon test completion.

func NoRowsInResultError 

func NoRowsInResultError(err error) bool

func NullString 

func NullString() pgtype.Text

NullString returns a postgres null string

func String 

func String(s string) pgtype.Text

String converts a go-string into a postgres non-null string

func StringPtr 

func StringPtr(s *string) pgtype.Text

StringPtr converts a go-string pointer into a postgres nullable string

func Timestamptz 

func Timestamptz(t time.Time) pgtype.Timestamptz

Timestamptz converts a go-time into a postgres non-null timestamptz

func TimestamptzPtr 

func TimestamptzPtr(t *time.Time) pgtype.Timestamptz

TimestamptzPtr converts a go-time pointer into a postgres nullable timestamptz

func UUID 

func UUID(s uuid.UUID) pgtype.UUID

UUID converts a google-go-uuid into a postgres non-null UUID

Types

type Action 

type Action string

Action is the action that was carried out on a database table

type DB 

type DB struct {
	*pgxpool.Pool // db connection pool
	logr.Logger
}

DB provides access to the postgres db as well as queries generated from SQL

func New 

func New(ctx context.Context, opts Options) (*DB, error)

New constructs a new DB connection pool, and migrates the schema to the latest version.

func (*DB) Conn 

func (db *DB) Conn(ctx context.Context) *pggen.DBQuerier

Conn provides pre-generated queries

func (*DB) Exec 

func (db *DB) Exec(ctx context.Context, sql string, args ...any) (pgconn.CommandTag, error)

Exec acquires a connection from the pool and executes the given SQL. If the context contains a transaction then that is used.

func (*DB) Lock 

func (db *DB) Lock(ctx context.Context, table string, fn func(context.Context, pggen.Querier) error) error

func (*DB) QueryRow 

func (db *DB) QueryRow(ctx context.Context, sql string, args ...any) pgx.Row

func (*DB) SendBatch 

func (db *DB) SendBatch(ctx context.Context, b *pgx.Batch) pgx.BatchResults

func (*DB) Tx 

func (db *DB) Tx(ctx context.Context, callback func(context.Context, pggen.Querier) error) error

Tx provides the caller with a callback in which all operations are conducted within a transaction.

func (*DB) WaitAndLock 

func (db *DB) WaitAndLock(ctx context.Context, id int64, fn func(context.Context) error) (err error)

WaitAndLock obtains an exclusive session-level advisory lock. If another session holds the lock with the given id then it'll wait until the other session releases the lock. The given fn is called once the lock is obtained and when the fn finishes the lock is released.

type ForwardFunc 

type ForwardFunc func(ctx context.Context, id string, action Action)

ForwardFunc handles forwarding the id and action onto subscribers.

type Listener 

type Listener struct {
	logr.Logger
	// contains filtered or unexported fields
}

Listener listens for postgres events

func NewListener 

func NewListener(logger logr.Logger, db pool) *Listener

func (*Listener) RegisterFunc 

func (b *Listener) RegisterFunc(table string, getter ForwardFunc)

RegisterFunc registers a function that is capable of converting database events for the given table into an OTF event.

func (*Listener) Start 

func (b *Listener) Start(ctx context.Context) error

Start the pubsub daemon; listen to notifications from postgres and forward to local pubsub broker. The listening channel is closed once the broker has started listening; from this point onwards published messages will be forwarded.

func (*Listener) Started 

func (b *Listener) Started() <-chan struct{}

type Options 

type Options struct {
	Logger     logr.Logger
	ConnString string
}

Options for constructing a DB

Source Files

View all Source files

Directories

Path Synopsis

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.