musicdb

package
v0.13.0 Latest Latest
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 Go to latest Published: Jan 17, 2021 License: MIT Imports: 8 Imported by: 0

Documentation

Overview

Example (ReadOnlyTransaction_MultipleTables) 
package main

import (
	"context"

	"cloud.google.com/go/spanner"
	"go.einride.tech/aip-spanner/internal/examples/musicdb"
)

func main() {
	ctx := context.Background()
	client, err := spanner.NewClient(
		ctx, "projects/<PROJECT>/instances/<INSTANCE>/databases/<DATABASE>",
	)
	if err != nil {
		panic(err) // TODO: Handle error.
	}
	tx := client.ReadOnlyTransaction()
	defer tx.Close()
	singer, err := musicdb.Singers(tx).Get(ctx, musicdb.SingersKey{
		SingerId: 42,
	})
	if err != nil {
		panic(err) // TODO: Handle error.
	}
	album, err := musicdb.Albums(tx).Get(ctx, musicdb.AlbumsKey{
		SingerId: 42,
		AlbumId:  24,
	})
	if err != nil {
		panic(err) // TODO: Handle error.
	}
	_ = singer // TODO: Use singer.
	_ = album  // TODO: Use album.
}

Output:

Index

Examples

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type AlbumsAndSongsReadTransaction 

type AlbumsAndSongsReadTransaction struct {
	Tx SpannerReadTransaction
}

func AlbumsAndSongs 

func AlbumsAndSongs(tx SpannerReadTransaction) AlbumsAndSongsReadTransaction

func (AlbumsAndSongsReadTransaction) BatchGet 

func (t AlbumsAndSongsReadTransaction) BatchGet(
	ctx context.Context,
	keys []AlbumsKey,
) (map[AlbumsKey]*AlbumsAndSongsRow, error)

func (AlbumsAndSongsReadTransaction) Get 

func (t AlbumsAndSongsReadTransaction) Get(
	ctx context.Context,
	key AlbumsKey,
) (*AlbumsAndSongsRow, error)

func (AlbumsAndSongsReadTransaction) List 

func (t AlbumsAndSongsReadTransaction) List(
	ctx context.Context,
	query ListQuery,
) *AlbumsAndSongsRowIterator

type AlbumsAndSongsRow 

type AlbumsAndSongsRow struct {
	SingerId   int64              `spanner:"SingerId"`
	AlbumId    int64              `spanner:"AlbumId"`
	AlbumTitle spanner.NullString `spanner:"AlbumTitle"`
	Songs      []*SongsRow        `spanner:"Songs"`
}

func (AlbumsAndSongsRow) AlbumsRow 

func (r AlbumsAndSongsRow) AlbumsRow() *AlbumsRow

func (AlbumsAndSongsRow) Insert 

func (r AlbumsAndSongsRow) Insert() []*spanner.Mutation

func (*AlbumsAndSongsRow) Key 

func (r *AlbumsAndSongsRow) Key() AlbumsKey

func (*AlbumsAndSongsRow) UnmarshalSpannerRow 

func (r *AlbumsAndSongsRow) UnmarshalSpannerRow(row *spanner.Row) error

func (AlbumsAndSongsRow) Update 

func (r AlbumsAndSongsRow) Update() []*spanner.Mutation

type AlbumsAndSongsRowIterator 

type AlbumsAndSongsRowIterator struct {
	*spanner.RowIterator
}

func (*AlbumsAndSongsRowIterator) Do 

func (i *AlbumsAndSongsRowIterator) Do(f func(row *AlbumsAndSongsRow) error) error

func (*AlbumsAndSongsRowIterator) Next 

func (i *AlbumsAndSongsRowIterator) Next() (*AlbumsAndSongsRow, error)

type AlbumsKey 

type AlbumsKey struct {
	SingerId int64
	AlbumId  int64
}

func (AlbumsKey) BoolExpr 

func (k AlbumsKey) BoolExpr() spansql.BoolExpr

func (AlbumsKey) Delete 

func (k AlbumsKey) Delete() *spanner.Mutation

func (AlbumsKey) Order 

func (AlbumsKey) Order() []spansql.Order

func (AlbumsKey) QualifiedBoolExpr 

func (k AlbumsKey) QualifiedBoolExpr(prefix spansql.PathExp) spansql.BoolExpr

func (AlbumsKey) SpannerKey 

func (k AlbumsKey) SpannerKey() spanner.Key

func (AlbumsKey) SpannerKeySet 

func (k AlbumsKey) SpannerKeySet() spanner.KeySet

type AlbumsReadTransaction 

type AlbumsReadTransaction struct {
	Tx SpannerReadTransaction
}

func Albums 

func Albums(tx SpannerReadTransaction) AlbumsReadTransaction

func (AlbumsReadTransaction) BatchGet 

func (t AlbumsReadTransaction) BatchGet(
	ctx context.Context,
	keys []AlbumsKey,
) (map[AlbumsKey]*AlbumsRow, error)

func (AlbumsReadTransaction) Get 

func (t AlbumsReadTransaction) Get(
	ctx context.Context,
	key AlbumsKey,
) (*AlbumsRow, error)
Example 
package main

import (
	"context"

	"cloud.google.com/go/spanner"
	"go.einride.tech/aip-spanner/internal/examples/musicdb"
)

func main() {
	ctx := context.Background()
	client, err := spanner.NewClient(
		ctx, "projects/<PROJECT>/instances/<INSTANCE>/databases/<DATABASE>",
	)
	if err != nil {
		panic(err) // TODO: Handle error.
	}
	singer, err := musicdb.Singers(client.Single()).Get(ctx, musicdb.SingersKey{
		SingerId: 42,
	})
	if err != nil {
		panic(err) // TODO: Handle error.
	}
	_ = singer // TODO: Use singer.
}

Output:

func (AlbumsReadTransaction) List 

func (t AlbumsReadTransaction) List(
	ctx context.Context,
	query ListQuery,
) *AlbumsRowIterator
Example 
package main

import (
	"context"

	"cloud.google.com/go/spanner"
	"cloud.google.com/go/spanner/spansql"
	"go.einride.tech/aip-spanner/internal/examples/musicdb"
)

func main() {
	ctx := context.Background()
	client, err := spanner.NewClient(
		ctx, "projects/<PROJECT>/instances/<INSTANCE>/databases/<DATABASE>",
	)
	if err != nil {
		panic(err) // TODO: Handle error.
	}
	// SELECT * FROM Singers
	// WHERE LastName = "Sinatra"
	// ORDER BY FirstName DESC
	// LIMIT 5
	// OFFSET 10
	if err := musicdb.Singers(client.Single()).List(ctx, musicdb.ListQuery{
		Where: spansql.ComparisonOp{
			Op:  spansql.Eq,
			LHS: musicdb.Descriptor().Singers().LastName().ColumnID(),
			RHS: spansql.StringLiteral("Sinatra"),
		},
		Order: []spansql.Order{
			{Expr: musicdb.Descriptor().Singers().FirstName().ColumnID(), Desc: true},
		},
		Limit:  5,
		Offset: 10,
	}).Do(func(singer *musicdb.SingersRow) error {
		_ = singer // TODO: Use singer.
		return nil
	}); err != nil {
		panic(err) // TODO: Handle error.
	}
}

Output:

func (AlbumsReadTransaction) Read 

func (t AlbumsReadTransaction) Read(
	ctx context.Context,
	keySet spanner.KeySet,
) *AlbumsRowIterator

type AlbumsRow 

type AlbumsRow struct {
	SingerId   int64              `spanner:"SingerId"`
	AlbumId    int64              `spanner:"AlbumId"`
	AlbumTitle spanner.NullString `spanner:"AlbumTitle"`
}

func (*AlbumsRow) ColumnExprs 

func (*AlbumsRow) ColumnExprs() []spansql.Expr

func (*AlbumsRow) ColumnIDs 

func (*AlbumsRow) ColumnIDs() []spansql.ID

func (*AlbumsRow) ColumnNames 

func (*AlbumsRow) ColumnNames() []string

func (*AlbumsRow) Insert 

func (r *AlbumsRow) Insert() *spanner.Mutation

func (*AlbumsRow) InsertColumns 

func (r *AlbumsRow) InsertColumns(columns []string) *spanner.Mutation

func (*AlbumsRow) InsertOrUpdate 

func (r *AlbumsRow) InsertOrUpdate() *spanner.Mutation

func (*AlbumsRow) InsertOrUpdateColumns 

func (r *AlbumsRow) InsertOrUpdateColumns(columns []string) *spanner.Mutation

func (*AlbumsRow) Key 

func (r *AlbumsRow) Key() AlbumsKey

func (*AlbumsRow) Mutation 

func (r *AlbumsRow) Mutation() (string, []string, []interface{})

func (*AlbumsRow) MutationForColumns 

func (r *AlbumsRow) MutationForColumns(columns []string) (string, []string, []interface{})

func (*AlbumsRow) UnmarshalSpannerRow 

func (r *AlbumsRow) UnmarshalSpannerRow(row *spanner.Row) error

func (*AlbumsRow) Update 

func (r *AlbumsRow) Update() *spanner.Mutation

func (*AlbumsRow) UpdateColumns 

func (r *AlbumsRow) UpdateColumns(columns []string) *spanner.Mutation

func (*AlbumsRow) Validate 

func (r *AlbumsRow) Validate() error

type AlbumsRowIterator 

type AlbumsRowIterator struct {
	*spanner.RowIterator
}

func (*AlbumsRowIterator) Do 

func (i *AlbumsRowIterator) Do(f func(row *AlbumsRow) error) error

func (*AlbumsRowIterator) Next 

func (i *AlbumsRowIterator) Next() (*AlbumsRow, error)

type AlbumsTableDescriptor 

type AlbumsTableDescriptor interface {
	TableName() string
	TableID() spansql.ID
	ColumnNames() []string
	ColumnIDs() []spansql.ID
	SingerId() ColumnDescriptor
	AlbumId() ColumnDescriptor
	AlbumTitle() ColumnDescriptor
}

type ColumnDescriptor 

type ColumnDescriptor interface {
	ColumnID() spansql.ID
	ColumnName() string
	ColumnType() spansql.Type
	NotNull() bool
	AllowCommitTimestamp() bool
}

type DatabaseDescriptor 

type DatabaseDescriptor interface {
	Singers() SingersTableDescriptor
	Albums() AlbumsTableDescriptor
	Songs() SongsTableDescriptor
}

func Descriptor 

func Descriptor() DatabaseDescriptor

type ListQuery 

type ListQuery struct {
	Where  spansql.BoolExpr
	Order  []spansql.Order
	Limit  int32
	Offset int64
}

type SingersAndAlbumsReadTransaction 

type SingersAndAlbumsReadTransaction struct {
	Tx SpannerReadTransaction
}

func SingersAndAlbums 

func SingersAndAlbums(tx SpannerReadTransaction) SingersAndAlbumsReadTransaction

func (SingersAndAlbumsReadTransaction) BatchGet 

func (t SingersAndAlbumsReadTransaction) BatchGet(
	ctx context.Context,
	keys []SingersKey,
) (map[SingersKey]*SingersAndAlbumsRow, error)

func (SingersAndAlbumsReadTransaction) Get 

func (t SingersAndAlbumsReadTransaction) Get(
	ctx context.Context,
	key SingersKey,
) (*SingersAndAlbumsRow, error)

func (SingersAndAlbumsReadTransaction) List 

func (t SingersAndAlbumsReadTransaction) List(
	ctx context.Context,
	query ListQuery,
) *SingersAndAlbumsRowIterator

type SingersAndAlbumsRow 

type SingersAndAlbumsRow struct {
	SingerId   int64              `spanner:"SingerId"`
	FirstName  spanner.NullString `spanner:"FirstName"`
	LastName   spanner.NullString `spanner:"LastName"`
	SingerInfo []uint8            `spanner:"SingerInfo"`
	Albums     []*AlbumsRow       `spanner:"Albums"`
}

func (SingersAndAlbumsRow) Insert 

func (r SingersAndAlbumsRow) Insert() []*spanner.Mutation

func (*SingersAndAlbumsRow) Key 

func (r *SingersAndAlbumsRow) Key() SingersKey

func (SingersAndAlbumsRow) SingersRow 

func (r SingersAndAlbumsRow) SingersRow() *SingersRow

func (*SingersAndAlbumsRow) UnmarshalSpannerRow 

func (r *SingersAndAlbumsRow) UnmarshalSpannerRow(row *spanner.Row) error

func (SingersAndAlbumsRow) Update 

func (r SingersAndAlbumsRow) Update() []*spanner.Mutation

type SingersAndAlbumsRowIterator 

type SingersAndAlbumsRowIterator struct {
	*spanner.RowIterator
}

func (*SingersAndAlbumsRowIterator) Do 

func (i *SingersAndAlbumsRowIterator) Do(f func(row *SingersAndAlbumsRow) error) error

func (*SingersAndAlbumsRowIterator) Next 

func (i *SingersAndAlbumsRowIterator) Next() (*SingersAndAlbumsRow, error)

type SingersKey 

type SingersKey struct {
	SingerId int64
}

func (SingersKey) BoolExpr 

func (k SingersKey) BoolExpr() spansql.BoolExpr

func (SingersKey) Delete 

func (k SingersKey) Delete() *spanner.Mutation

func (SingersKey) Order 

func (SingersKey) Order() []spansql.Order

func (SingersKey) QualifiedBoolExpr 

func (k SingersKey) QualifiedBoolExpr(prefix spansql.PathExp) spansql.BoolExpr

func (SingersKey) SpannerKey 

func (k SingersKey) SpannerKey() spanner.Key

func (SingersKey) SpannerKeySet 

func (k SingersKey) SpannerKeySet() spanner.KeySet

type SingersReadTransaction 

type SingersReadTransaction struct {
	Tx SpannerReadTransaction
}

func Singers 

func Singers(tx SpannerReadTransaction) SingersReadTransaction

func (SingersReadTransaction) BatchGet 

func (t SingersReadTransaction) BatchGet(
	ctx context.Context,
	keys []SingersKey,
) (map[SingersKey]*SingersRow, error)

func (SingersReadTransaction) Get 

func (t SingersReadTransaction) Get(
	ctx context.Context,
	key SingersKey,
) (*SingersRow, error)

func (SingersReadTransaction) List 

func (t SingersReadTransaction) List(
	ctx context.Context,
	query ListQuery,
) *SingersRowIterator

func (SingersReadTransaction) Read 

func (t SingersReadTransaction) Read(
	ctx context.Context,
	keySet spanner.KeySet,
) *SingersRowIterator

type SingersRow 

type SingersRow struct {
	SingerId   int64              `spanner:"SingerId"`
	FirstName  spanner.NullString `spanner:"FirstName"`
	LastName   spanner.NullString `spanner:"LastName"`
	SingerInfo []uint8            `spanner:"SingerInfo"`
}

func (*SingersRow) ColumnExprs 

func (*SingersRow) ColumnExprs() []spansql.Expr

func (*SingersRow) ColumnIDs 

func (*SingersRow) ColumnIDs() []spansql.ID

func (*SingersRow) ColumnNames 

func (*SingersRow) ColumnNames() []string

func (*SingersRow) Insert 

func (r *SingersRow) Insert() *spanner.Mutation

func (*SingersRow) InsertColumns 

func (r *SingersRow) InsertColumns(columns []string) *spanner.Mutation

func (*SingersRow) InsertOrUpdate 

func (r *SingersRow) InsertOrUpdate() *spanner.Mutation

func (*SingersRow) InsertOrUpdateColumns 

func (r *SingersRow) InsertOrUpdateColumns(columns []string) *spanner.Mutation

func (*SingersRow) Key 

func (r *SingersRow) Key() SingersKey

func (*SingersRow) Mutation 

func (r *SingersRow) Mutation() (string, []string, []interface{})

func (*SingersRow) MutationForColumns 

func (r *SingersRow) MutationForColumns(columns []string) (string, []string, []interface{})

func (*SingersRow) UnmarshalSpannerRow 

func (r *SingersRow) UnmarshalSpannerRow(row *spanner.Row) error

func (*SingersRow) Update 

func (r *SingersRow) Update() *spanner.Mutation

func (*SingersRow) UpdateColumns 

func (r *SingersRow) UpdateColumns(columns []string) *spanner.Mutation

func (*SingersRow) Validate 

func (r *SingersRow) Validate() error

type SingersRowIterator 

type SingersRowIterator struct {
	*spanner.RowIterator
}

func (*SingersRowIterator) Do 

func (i *SingersRowIterator) Do(f func(row *SingersRow) error) error

func (*SingersRowIterator) Next 

func (i *SingersRowIterator) Next() (*SingersRow, error)

type SingersTableDescriptor 

type SingersTableDescriptor interface {
	TableName() string
	TableID() spansql.ID
	ColumnNames() []string
	ColumnIDs() []spansql.ID
	SingerId() ColumnDescriptor
	FirstName() ColumnDescriptor
	LastName() ColumnDescriptor
	SingerInfo() ColumnDescriptor
}

type SongsKey 

type SongsKey struct {
	SingerId int64
	AlbumId  int64
	TrackId  int64
}

func (SongsKey) BoolExpr 

func (k SongsKey) BoolExpr() spansql.BoolExpr

func (SongsKey) Delete 

func (k SongsKey) Delete() *spanner.Mutation

func (SongsKey) Order 

func (SongsKey) Order() []spansql.Order

func (SongsKey) QualifiedBoolExpr 

func (k SongsKey) QualifiedBoolExpr(prefix spansql.PathExp) spansql.BoolExpr

func (SongsKey) SpannerKey 

func (k SongsKey) SpannerKey() spanner.Key

func (SongsKey) SpannerKeySet 

func (k SongsKey) SpannerKeySet() spanner.KeySet

type SongsReadTransaction 

type SongsReadTransaction struct {
	Tx SpannerReadTransaction
}

func Songs 

func Songs(tx SpannerReadTransaction) SongsReadTransaction

func (SongsReadTransaction) BatchGet 

func (t SongsReadTransaction) BatchGet(
	ctx context.Context,
	keys []SongsKey,
) (map[SongsKey]*SongsRow, error)

func (SongsReadTransaction) Get 

func (t SongsReadTransaction) Get(
	ctx context.Context,
	key SongsKey,
) (*SongsRow, error)

func (SongsReadTransaction) List 

func (t SongsReadTransaction) List(
	ctx context.Context,
	query ListQuery,
) *SongsRowIterator

func (SongsReadTransaction) Read 

func (t SongsReadTransaction) Read(
	ctx context.Context,
	keySet spanner.KeySet,
) *SongsRowIterator

type SongsRow 

type SongsRow struct {
	SingerId int64              `spanner:"SingerId"`
	AlbumId  int64              `spanner:"AlbumId"`
	TrackId  int64              `spanner:"TrackId"`
	SongName spanner.NullString `spanner:"SongName"`
}

func (*SongsRow) ColumnExprs 

func (*SongsRow) ColumnExprs() []spansql.Expr

func (*SongsRow) ColumnIDs 

func (*SongsRow) ColumnIDs() []spansql.ID

func (*SongsRow) ColumnNames 

func (*SongsRow) ColumnNames() []string

func (*SongsRow) Insert 

func (r *SongsRow) Insert() *spanner.Mutation

func (*SongsRow) InsertColumns 

func (r *SongsRow) InsertColumns(columns []string) *spanner.Mutation

func (*SongsRow) InsertOrUpdate 

func (r *SongsRow) InsertOrUpdate() *spanner.Mutation

func (*SongsRow) InsertOrUpdateColumns 

func (r *SongsRow) InsertOrUpdateColumns(columns []string) *spanner.Mutation

func (*SongsRow) Key 

func (r *SongsRow) Key() SongsKey

func (*SongsRow) Mutation 

func (r *SongsRow) Mutation() (string, []string, []interface{})

func (*SongsRow) MutationForColumns 

func (r *SongsRow) MutationForColumns(columns []string) (string, []string, []interface{})

func (*SongsRow) UnmarshalSpannerRow 

func (r *SongsRow) UnmarshalSpannerRow(row *spanner.Row) error

func (*SongsRow) Update 

func (r *SongsRow) Update() *spanner.Mutation

func (*SongsRow) UpdateColumns 

func (r *SongsRow) UpdateColumns(columns []string) *spanner.Mutation

func (*SongsRow) Validate 

func (r *SongsRow) Validate() error

type SongsRowIterator 

type SongsRowIterator struct {
	*spanner.RowIterator
}

func (*SongsRowIterator) Do 

func (i *SongsRowIterator) Do(f func(row *SongsRow) error) error

func (*SongsRowIterator) Next 

func (i *SongsRowIterator) Next() (*SongsRow, error)

type SongsTableDescriptor 

type SongsTableDescriptor interface {
	TableName() string
	TableID() spansql.ID
	ColumnNames() []string
	ColumnIDs() []spansql.ID
	SingerId() ColumnDescriptor
	AlbumId() ColumnDescriptor
	TrackId() ColumnDescriptor
	SongName() ColumnDescriptor
}

type SpannerReadTransaction 

type SpannerReadTransaction interface {
	Read(ctx context.Context, table string, keys spanner.KeySet, columns []string) *spanner.RowIterator
	ReadRow(ctx context.Context, table string, key spanner.Key, columns []string) (*spanner.Row, error)
	Query(ctx context.Context, statement spanner.Statement) *spanner.RowIterator
}

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