func ExampleRangeIterator() {
_ = fdb.APIVersion(100)
db, _ := fdb.OpenDefault()
tr, _ := db.CreateTransaction()
// Clear and initialize data in this transaction. In examples we do not
// commit transactions to avoid mutating a real database.
tr.ClearRange(fdb.KeyRange{fdb.Key(""), fdb.Key{0xFF}})
tr.Set(fdb.Key("apple"), []byte("foo"))
tr.Set(fdb.Key("cherry"), []byte("baz"))
tr.Set(fdb.Key("banana"), []byte("bar"))
rr := tr.GetRange(fdb.KeyRange{fdb.Key(""), fdb.Key{0xFF}}, fdb.RangeOptions{})
ri := rr.Iterator()
// Advance() will return true until the iterator is exhausted
for ri.Advance() {
kv, _ := ri.GetNextWithError()
fmt.Printf("%s is %s\n", kv.Key, kv.Value)
}
// Output:
// apple is foo
// banana is bar
// cherry is baz
}
func ExamplePrefixRange() {
_ = fdb.APIVersion(100)
db, _ := fdb.OpenDefault()
tr, _ := db.CreateTransaction()
// Clear and initialize data in this transaction. In examples we do not
// commit transactions to avoid mutating a real database.
tr.ClearRange(fdb.KeyRange{fdb.Key(""), fdb.Key{0xFF}})
tr.Set(fdb.Key("alpha"), []byte("1"))
tr.Set(fdb.Key("alphabetA"), []byte("2"))
tr.Set(fdb.Key("alphabetB"), []byte("3"))
tr.Set(fdb.Key("alphabetize"), []byte("4"))
tr.Set(fdb.Key("beta"), []byte("5"))
// Construct the range of all keys beginning with "alphabet"
pr, _ := fdb.PrefixRange([]byte("alphabet"))
// Read and process the range
kvs, _ := tr.GetRange(pr, fdb.RangeOptions{}).GetSliceWithError()
for _, kv := range kvs {
fmt.Printf("%s: %s\n", string(kv.Key), string(kv.Value))
}
// Output:
// alphabetA: 2
// alphabetB: 3
// alphabetize: 4
}
func ExampleOpenDefault() {
var e error
e = fdb.APIVersion(100)
if e != nil {
log.Fatalf("Unable to set API version (%v)\n", e)
}
// OpenDefault opens the database described by the platform-specific default
// cluster file and the database name []byte("DB").
db, e := fdb.OpenDefault()
if e != nil {
log.Fatalf("Unable to open default database (%v)\n", e)
}
_ = db
}
func ExampleOpenDefault() {
var e error
e = fdb.APIVersion(200)
if e != nil {
fmt.Printf("Unable to set API version: %v\n", e)
return
}
// OpenDefault opens the database described by the platform-specific default
// cluster file and the database name []byte("DB").
db, e := fdb.OpenDefault()
if e != nil {
fmt.Printf("Unable to open default database: %v\n", e)
return
}
_ = db
}
func ExampleTransactor() {
_ = fdb.APIVersion(100)
db, _ := fdb.OpenDefault()
fmt.Printf("Calling setOne with a database:\n")
setOne(db, []byte("foo"), []byte("bar"))
fmt.Printf("\nCalling setMany with a database:\n")
setMany(db, []byte("bar"), []byte("foo1"), []byte("foo2"), []byte("foo3"))
// Output:
// Calling setOne with a database:
// setOne got: fdb.Database
//
// Calling setMany with a database:
// setMany got: fdb.Database
// setOne got: fdb.Transaction
// setOne got: fdb.Transaction
// setOne got: fdb.Transaction
}