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Finalized new key store implementation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| // +build !js | ||
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| package db | ||
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| import ( | ||
| "database/sql" | ||
| "fmt" | ||
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| "github.com/ipfs/go-ds-sql" | ||
| _ "github.com/lib/pq" //postgres driver | ||
| ) | ||
|
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| /// PostgreSQL | ||
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| // Options are the postgres datastore options, reexported here for convenience. | ||
| type PostgreSQLOptions struct { | ||
| Host string | ||
| Port string | ||
| User string | ||
| Password string | ||
| Database string | ||
| Table string | ||
| } | ||
|
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| type postgreSQLQueries struct { | ||
| tableName string | ||
| } | ||
|
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| func NewPostgreSQLQueriesForTable(tableName string) *postgreSQLQueries { | ||
| return &postgreSQLQueries{tableName} | ||
| } | ||
|
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| func (q postgreSQLQueries) Delete() string { | ||
| return `DELETE FROM ` + q.tableName + ` WHERE key = $1` | ||
| } | ||
|
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| func (q postgreSQLQueries) Exists() string { | ||
| return `SELECT exists(SELECT 1 FROM ` + q.tableName + ` WHERE key=$1)` | ||
| } | ||
|
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| func (q postgreSQLQueries) Get() string { | ||
| return `SELECT data FROM ` + q.tableName + ` WHERE key = $1` | ||
| } | ||
|
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| func (q postgreSQLQueries) Put() string { | ||
| return `INSERT INTO ` + q.tableName + ` (key, data) SELECT $1, $2 ON CONFLICT(key) DO UPDATE SET data = $2 WHERE key = $1` | ||
| } | ||
|
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| func (q postgreSQLQueries) Query() string { | ||
| return `SELECT key, data FROM ` + q.tableName | ||
| } | ||
|
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| func (q postgreSQLQueries) Prefix() string { | ||
| return ` WHERE key LIKE '%s%%' ORDER BY key` | ||
| } | ||
|
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| func (q postgreSQLQueries) Limit() string { | ||
| return ` LIMIT %d` | ||
| } | ||
|
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| func (q postgreSQLQueries) Offset() string { | ||
| return ` OFFSET %d` | ||
| } | ||
|
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| func (q postgreSQLQueries) GetSize() string { | ||
| return `SELECT octet_length(data) FROM ` + q.tableName + ` WHERE key = $1` | ||
| } | ||
|
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| // Create returns a datastore connected to postgres initialized with a table | ||
| func (opts *PostgreSQLOptions) CreatePostgres() (*sqlds.Datastore, error) { | ||
| opts.setDefaults() | ||
| fmtstr := "postgresql:///%s?host=%s&port=%s&user=%s&password=%s&sslmode=disable" | ||
| constr := fmt.Sprintf(fmtstr, opts.Database, opts.Host, opts.Port, opts.User, opts.Password) | ||
| db, err := sql.Open("postgres", constr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| createTable := fmt.Sprintf("CREATE TABLE IF NOT EXISTS %s (key TEXT NOT NULL UNIQUE, data BYTEA NOT NULL)", opts.Table) | ||
| _, err = db.Exec(createTable) | ||
|
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| if err != nil { | ||
| return nil, err | ||
| } | ||
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| return sqlds.NewDatastore(db, NewPostgreSQLQueriesForTable(opts.Table)), nil | ||
| } | ||
|
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| func (opts *PostgreSQLOptions) setDefaults() { | ||
| if opts.Table == "" { | ||
| opts.Table = "kv" | ||
| } | ||
| if opts.Host == "" { | ||
| opts.Host = "postgres" | ||
| } | ||
|
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| if opts.Port == "" { | ||
| opts.Port = "5432" | ||
| } | ||
|
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| if opts.User == "" { | ||
| opts.User = "postgres" | ||
| } | ||
|
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| if opts.Database == "" { | ||
| opts.Database = "datastore" | ||
| } | ||
| } | ||
|
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| /// Sqlite | ||
|
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| type sqliteQueries struct { | ||
| tableName string | ||
| } | ||
|
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| func NewSqliteQueriesForTable(tableName string) *sqliteQueries { | ||
| return &sqliteQueries{tableName} | ||
| } | ||
|
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| func (q sqliteQueries) Delete() string { | ||
| return `DELETE FROM ` + q.tableName + ` WHERE key = $1` | ||
| } | ||
|
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| func (q sqliteQueries) Exists() string { | ||
| return `SELECT exists(SELECT 1 FROM ` + q.tableName + ` WHERE key=$1)` | ||
| } | ||
|
|
||
| func (q sqliteQueries) Get() string { | ||
| return `SELECT data FROM ` + q.tableName + ` WHERE key = $1` | ||
| } | ||
|
|
||
| func (q sqliteQueries) Put() string { | ||
| return `INSERT INTO ` + q.tableName + ` (key, data) SELECT $1, $2 ON CONFLICT(key) DO UPDATE SET data = $2 WHERE key = $1` | ||
| } | ||
|
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||
| func (q sqliteQueries) Query() string { | ||
| return `SELECT key, data FROM ` + q.tableName | ||
| } | ||
|
|
||
| func (q sqliteQueries) Prefix() string { | ||
| return ` WHERE key LIKE '%s%%' ORDER BY key` | ||
| } | ||
|
|
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| func (q sqliteQueries) Limit() string { | ||
| return ` LIMIT %d` | ||
| } | ||
|
|
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| func (q sqliteQueries) Offset() string { | ||
| return ` OFFSET %d` | ||
| } | ||
|
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| func (q sqliteQueries) GetSize() string { | ||
| return `SELECT length(data) FROM ` + q.tableName + ` WHERE key = $1` | ||
| } |
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