forked from segmentio/parquet-go
/
writer_test.go
605 lines (524 loc) · 18.7 KB
/
writer_test.go
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package parquet_test
import (
"bytes"
"fmt"
"os"
"os/exec"
"strings"
"testing"
"testing/quick"
"github.com/google/uuid"
"github.com/hexops/gotextdiff"
"github.com/hexops/gotextdiff/myers"
"github.com/hexops/gotextdiff/span"
"github.com/segmentio/parquet-go"
)
const (
v1 = 1
v2 = 2
)
func scanParquetFile(f *os.File) error {
s, err := f.Stat()
if err != nil {
return err
}
p, err := parquet.OpenFile(f, s.Size())
if err != nil {
return err
}
return scanParquetValues(p.Root())
}
func scanParquetValues(col *parquet.Column) error {
return forEachColumnValue(col, func(leaf *parquet.Column, value parquet.Value) error {
fmt.Printf("%s > %+v\n", strings.Join(leaf.Path(), "."), value)
return nil
})
}
func generateParquetFile(dataPageVersion int, rows rows) ([]byte, error) {
tmp, err := os.CreateTemp("/tmp", "*.parquet")
if err != nil {
return nil, err
}
defer tmp.Close()
path := tmp.Name()
defer os.Remove(path)
//fmt.Println(path)
if err := writeParquetFile(tmp, rows, parquet.DataPageVersion(dataPageVersion), parquet.PageBufferSize(20)); err != nil {
return nil, err
}
if err := scanParquetFile(tmp); err != nil {
return nil, err
}
return parquetTools("dump", path)
}
type firstAndLastName struct {
FirstName string `parquet:"first_name,dict,zstd"`
LastName string `parquet:"last_name,delta,zstd"`
}
type timeseries struct {
Name string `parquet:"name,dict"`
Timestamp int64 `parquet:"timestamp,delta"`
Value float64 `parquet:"value"`
}
var writerTests = []struct {
scenario string
version int
rows []interface{}
dump string
}{
{
scenario: "page v1 with dictionary encoding",
version: v1,
rows: []interface{}{
&firstAndLastName{FirstName: "Han", LastName: "Solo"},
&firstAndLastName{FirstName: "Leia", LastName: "Skywalker"},
&firstAndLastName{FirstName: "Luke", LastName: "Skywalker"},
},
dump: `row group 0
--------------------------------------------------------------------------------
first_name: BINARY ZSTD DO:4 FPO:55 SZ:90/72/0.80 VC:3 ENC:PLAIN,RLE_DICTIONARY [more]...
last_name: BINARY ZSTD DO:0 FPO:94 SZ:148/121/0.82 VC:3 ENC:DELTA_BYTE_ARRAY [more]...
first_name TV=3 RL=0 DL=0 DS: 3 DE:PLAIN
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:RLE_DICTIONARY [more]... SZ:7
last_name TV=3 RL=0 DL=0
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:DELTA_BYTE_ARRAY [more]... SZ:14
page 1: DLE:RLE RLE:RLE VLE:DELTA_BYTE_ARRAY [more]... SZ:19
page 2: DLE:RLE RLE:RLE VLE:DELTA_BYTE_ARRAY [more]... SZ:19
BINARY first_name
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 3 ***
value 1: R:0 D:0 V:Han
value 2: R:0 D:0 V:Leia
value 3: R:0 D:0 V:Luke
BINARY last_name
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 3 ***
value 1: R:0 D:0 V:Solo
value 2: R:0 D:0 V:Skywalker
value 3: R:0 D:0 V:Skywalker
`,
},
{ // same as the previous test but uses page v2 where data pages aren't compressed
scenario: "page v2 with dictionary encoding",
version: v2,
rows: []interface{}{
&firstAndLastName{FirstName: "Han", LastName: "Solo"},
&firstAndLastName{FirstName: "Leia", LastName: "Skywalker"},
&firstAndLastName{FirstName: "Luke", LastName: "Skywalker"},
},
dump: `row group 0
--------------------------------------------------------------------------------
first_name: BINARY ZSTD DO:4 FPO:55 SZ:86/77/0.90 VC:3 ENC:RLE_DICTIONARY,PLAIN [more]...
last_name: BINARY ZSTD DO:0 FPO:90 SZ:163/136/0.83 VC:3 ENC:DELTA_BYTE_ARRAY [more]...
first_name TV=3 RL=0 DL=0 DS: 3 DE:PLAIN
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:RLE_DICTIONARY [more]... VC:3
last_name TV=3 RL=0 DL=0
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:DELTA_BYTE_ARRAY [more]... VC:1
page 1: DLE:RLE RLE:RLE VLE:DELTA_BYTE_ARRAY [more]... VC:1
page 2: DLE:RLE RLE:RLE VLE:DELTA_BYTE_ARRAY [more]... VC:1
BINARY first_name
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 3 ***
value 1: R:0 D:0 V:Han
value 2: R:0 D:0 V:Leia
value 3: R:0 D:0 V:Luke
BINARY last_name
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 3 ***
value 1: R:0 D:0 V:Solo
value 2: R:0 D:0 V:Skywalker
value 3: R:0 D:0 V:Skywalker
`,
},
{
scenario: "timeseries with delta encoding",
version: v2,
rows: []interface{}{
timeseries{Name: "http_request_total", Timestamp: 1639444033, Value: 100},
timeseries{Name: "http_request_total", Timestamp: 1639444058, Value: 0},
timeseries{Name: "http_request_total", Timestamp: 1639444085, Value: 42},
timeseries{Name: "http_request_total", Timestamp: 1639444093, Value: 1},
timeseries{Name: "http_request_total", Timestamp: 1639444101, Value: 2},
timeseries{Name: "http_request_total", Timestamp: 1639444108, Value: 5},
timeseries{Name: "http_request_total", Timestamp: 1639444133, Value: 4},
timeseries{Name: "http_request_total", Timestamp: 1639444137, Value: 5},
timeseries{Name: "http_request_total", Timestamp: 1639444141, Value: 6},
timeseries{Name: "http_request_total", Timestamp: 1639444144, Value: 10},
},
dump: `row group 0
--------------------------------------------------------------------------------
name: BINARY UNCOMPRESSED DO:4 FPO:45 SZ:101/101/1.00 VC:10 ENC: [more]...
timestamp: INT64 UNCOMPRESSED DO:0 FPO:105 SZ:278/278/1.00 VC:10 ENC: [more]...
value: DOUBLE UNCOMPRESSED DO:0 FPO:383 SZ:220/220/1.00 VC:10 ENC:PLAIN [more]...
name TV=10 RL=0 DL=0 DS: 1 DE:PLAIN
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:RLE_DICTIONARY ST:[n [more]... VC:5
page 1: DLE:RLE RLE:RLE VLE:RLE_DICTIONARY ST:[n [more]... VC:5
timestamp TV=10 RL=0 DL=0
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:DELTA_BINARY_PACKED [more]... VC:2
page 1: DLE:RLE RLE:RLE VLE:DELTA_BINARY_PACKED [more]... VC:2
page 2: DLE:RLE RLE:RLE VLE:DELTA_BINARY_PACKED [more]... VC:2
page 3: DLE:RLE RLE:RLE VLE:DELTA_BINARY_PACKED [more]... VC:2
page 4: DLE:RLE RLE:RLE VLE:DELTA_BINARY_PACKED [more]... VC:2
value TV=10 RL=0 DL=0
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:PLAIN ST:[no stats f [more]... VC:2
page 1: DLE:RLE RLE:RLE VLE:PLAIN ST:[no stats f [more]... VC:2
page 2: DLE:RLE RLE:RLE VLE:PLAIN ST:[no stats f [more]... VC:2
page 3: DLE:RLE RLE:RLE VLE:PLAIN ST:[no stats f [more]... VC:2
page 4: DLE:RLE RLE:RLE VLE:PLAIN ST:[no stats f [more]... VC:2
BINARY name
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 10 ***
value 1: R:0 D:0 V:http_request_total
value 2: R:0 D:0 V:http_request_total
value 3: R:0 D:0 V:http_request_total
value 4: R:0 D:0 V:http_request_total
value 5: R:0 D:0 V:http_request_total
value 6: R:0 D:0 V:http_request_total
value 7: R:0 D:0 V:http_request_total
value 8: R:0 D:0 V:http_request_total
value 9: R:0 D:0 V:http_request_total
value 10: R:0 D:0 V:http_request_total
INT64 timestamp
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 10 ***
value 1: R:0 D:0 V:1639444033
value 2: R:0 D:0 V:1639444058
value 3: R:0 D:0 V:1639444085
value 4: R:0 D:0 V:1639444093
value 5: R:0 D:0 V:1639444101
value 6: R:0 D:0 V:1639444108
value 7: R:0 D:0 V:1639444133
value 8: R:0 D:0 V:1639444137
value 9: R:0 D:0 V:1639444141
value 10: R:0 D:0 V:1639444144
DOUBLE value
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 10 ***
value 1: R:0 D:0 V:100.0
value 2: R:0 D:0 V:0.0
value 3: R:0 D:0 V:42.0
value 4: R:0 D:0 V:1.0
value 5: R:0 D:0 V:2.0
value 6: R:0 D:0 V:5.0
value 7: R:0 D:0 V:4.0
value 8: R:0 D:0 V:5.0
value 9: R:0 D:0 V:6.0
value 10: R:0 D:0 V:10.0
`,
},
{
scenario: "example from the twitter blog (v1)",
version: v1,
rows: []interface{}{
AddressBook{
Owner: "Julien Le Dem",
OwnerPhoneNumbers: []string{
"555 123 4567",
"555 666 1337",
},
Contacts: []Contact{
{
Name: "Dmitriy Ryaboy",
PhoneNumber: "555 987 6543",
},
{
Name: "Chris Aniszczyk",
},
},
},
AddressBook{
Owner: "A. Nonymous",
OwnerPhoneNumbers: nil,
},
},
dump: `row group 0
--------------------------------------------------------------------------------
contacts:
.name: BINARY UNCOMPRESSED DO:0 FPO:4 SZ:120/120/1.00 VC:3 [more]...
.phoneNumber: BINARY ZSTD DO:0 FPO:124 SZ:114/96/0.84 VC:3 ENC:R [more]...
owner: BINARY ZSTD DO:0 FPO:238 SZ:98/80/0.82 VC:2 ENC:DE [more]...
ownerPhoneNumbers: BINARY GZIP DO:0 FPO:336 SZ:166/116/0.70 VC:3 ENC: [more]...
contacts.name TV=3 RL=1 DL=1
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... SZ:57
page 1: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... SZ:17
contacts.phoneNumber TV=3 RL=1 DL=2
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... SZ:33
page 1: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... SZ:17
owner TV=2 RL=0 DL=0
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... SZ:18
page 1: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... SZ:16
ownerPhoneNumbers TV=3 RL=1 DL=1
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... SZ:52
page 1: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... SZ:17
BINARY contacts.name
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 3 ***
value 1: R:0 D:1 V:Dmitriy Ryaboy
value 2: R:1 D:1 V:Chris Aniszczyk
value 3: R:0 D:0 V:<null>
BINARY contacts.phoneNumber
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 3 ***
value 1: R:0 D:2 V:555 987 6543
value 2: R:1 D:1 V:<null>
value 3: R:0 D:0 V:<null>
BINARY owner
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 2 ***
value 1: R:0 D:0 V:Julien Le Dem
value 2: R:0 D:0 V:A. Nonymous
BINARY ownerPhoneNumbers
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 3 ***
value 1: R:0 D:1 V:555 123 4567
value 2: R:1 D:1 V:555 666 1337
value 3: R:0 D:0 V:<null>
`,
},
{
scenario: "example from the twitter blog (v2)",
version: v2,
rows: []interface{}{
AddressBook{
Owner: "Julien Le Dem",
OwnerPhoneNumbers: []string{
"555 123 4567",
"555 666 1337",
},
Contacts: []Contact{
{
Name: "Dmitriy Ryaboy",
PhoneNumber: "555 987 6543",
},
{
Name: "Chris Aniszczyk",
},
},
},
AddressBook{
Owner: "A. Nonymous",
OwnerPhoneNumbers: nil,
},
},
dump: `row group 0
--------------------------------------------------------------------------------
contacts:
.name: BINARY UNCOMPRESSED DO:0 FPO:4 SZ:114/114/1.00 VC:3 [more]...
.phoneNumber: BINARY ZSTD DO:0 FPO:118 SZ:108/90/0.83 VC:3 ENC:R [more]...
owner: BINARY ZSTD DO:0 FPO:226 SZ:108/90/0.83 VC:2 ENC:D [more]...
ownerPhoneNumbers: BINARY GZIP DO:0 FPO:334 SZ:159/109/0.69 VC:3 ENC: [more]...
contacts.name TV=3 RL=1 DL=1
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... VC:2
page 1: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... VC:1
contacts.phoneNumber TV=3 RL=1 DL=2
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... VC:2
page 1: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... VC:1
owner TV=2 RL=0 DL=0
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... VC:1
page 1: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... VC:1
ownerPhoneNumbers TV=3 RL=1 DL=1
----------------------------------------------------------------------------
page 0: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... VC:2
page 1: DLE:RLE RLE:RLE VLE:DELTA_LENGTH_BYTE_ARRAY ST:[no stats [more]... VC:1
BINARY contacts.name
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 3 ***
value 1: R:0 D:1 V:Dmitriy Ryaboy
value 2: R:1 D:1 V:Chris Aniszczyk
value 3: R:0 D:0 V:<null>
BINARY contacts.phoneNumber
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 3 ***
value 1: R:0 D:2 V:555 987 6543
value 2: R:1 D:1 V:<null>
value 3: R:0 D:0 V:<null>
BINARY owner
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 2 ***
value 1: R:0 D:0 V:Julien Le Dem
value 2: R:0 D:0 V:A. Nonymous
BINARY ownerPhoneNumbers
--------------------------------------------------------------------------------
*** row group 1 of 1, values 1 to 3 ***
value 1: R:0 D:1 V:555 123 4567
value 2: R:1 D:1 V:555 666 1337
value 3: R:0 D:0 V:<null>
`,
},
}
func TestWriter(t *testing.T) {
if !hasParquetTools() {
t.Skip("parquet-tools are not installed")
}
for _, test := range writerTests {
dataPageVersion := test.version
rows := test.rows
dump := test.dump
t.Run(test.scenario, func(t *testing.T) {
t.Parallel()
b, err := generateParquetFile(dataPageVersion, makeRows(rows))
if err != nil {
t.Logf("\n%s", string(b))
t.Fatal(err)
}
if string(b) != dump {
edits := myers.ComputeEdits(span.URIFromPath("want.txt"), dump, string(b))
diff := fmt.Sprint(gotextdiff.ToUnified("want.txt", "got.txt", dump, edits))
t.Errorf("\n%s", diff)
}
})
}
}
func hasParquetTools() bool {
_, err := exec.LookPath("parquet-tools")
return err == nil
}
func parquetTools(cmd, path string) ([]byte, error) {
p := exec.Command("parquet-tools", cmd, "--debug", path)
output, err := p.CombinedOutput()
if err != nil {
return output, err
}
// parquet-tools has trailing spaces on some lines
lines := bytes.Split(output, []byte("\n"))
for i, line := range lines {
lines[i] = bytes.TrimRight(line, " ")
}
return bytes.Join(lines, []byte("\n")), nil
}
func TestWriterGenerateBloomFilters(t *testing.T) {
type Person struct {
FirstName utf8string `parquet:"first_name"`
LastName utf8string `parquet:"last_name"`
}
f := func(rows []Person) bool {
if len(rows) == 0 { // TODO: support writing files with no rows
return true
}
buffer := new(bytes.Buffer)
writer := parquet.NewWriter(buffer,
parquet.BloomFilters(
parquet.SplitBlockFilter("last_name"),
),
)
for i := range rows {
if err := writer.Write(&rows[i]); err != nil {
t.Error(err)
return false
}
}
if err := writer.Close(); err != nil {
t.Error(err)
return false
}
reader := bytes.NewReader(buffer.Bytes())
f, err := parquet.OpenFile(reader, reader.Size())
if err != nil {
t.Error(err)
return false
}
rowGroup := f.RowGroup(0)
firstName := rowGroup.Column(0)
lastName := rowGroup.Column(1)
if firstName.BloomFilter() != nil {
t.Errorf(`"first_name" column has a bloom filter even though none were configured`)
return false
}
bloomFilter := lastName.BloomFilter()
if bloomFilter == nil {
t.Error(`"last_name" column has no bloom filter despite being configured to have one`)
return false
}
for i, row := range rows {
if ok, err := bloomFilter.Check(parquet.ValueOf(row.LastName)); err != nil {
t.Errorf("unexpected error checking bloom filter: %v", err)
return false
} else if !ok {
t.Errorf("bloom filter does not contain value %q of row %d", row.LastName, i)
return false
}
}
return true
}
if err := quick.Check(f, nil); err != nil {
t.Error(err)
}
}
func TestBloomFilterForDict(t *testing.T) {
type testStruct struct {
A string `parquet:"a,dict"`
}
schema := parquet.SchemaOf(&testStruct{})
b := bytes.NewBuffer(nil)
w := parquet.NewWriter(
b,
schema,
parquet.BloomFilters(parquet.SplitBlockFilter("a")),
)
err := w.Write(&testStruct{A: "test"})
if err != nil {
t.Fatal(err)
}
err = w.Close()
if err != nil {
t.Fatal(err)
}
f, err := parquet.OpenFile(bytes.NewReader(b.Bytes()), int64(b.Len()))
if err != nil {
t.Fatal(err)
}
ok, err := f.RowGroup(0).Column(0).BloomFilter().Check(parquet.ValueOf("test"))
if err != nil {
t.Fatal(err)
}
if !ok {
t.Error("bloom filter should have contained 'test'")
}
}
func TestWriterRepeatedUUIDDict(t *testing.T) {
inputID := uuid.MustParse("123456ab-0000-0000-0000-000000000000")
records := []struct {
List []uuid.UUID `parquet:"list,dict"`
}{{
[]uuid.UUID{inputID},
}}
schema := parquet.SchemaOf(&records[0])
b := bytes.NewBuffer(nil)
w := parquet.NewWriter(b, schema)
err := w.Write(records[0])
if err != nil {
t.Fatal(err)
}
if err := w.Close(); err != nil {
t.Fatal(err)
}
f, err := parquet.OpenFile(bytes.NewReader(b.Bytes()), int64(b.Len()))
if err != nil {
t.Fatal(err)
}
rows := f.RowGroup(0).Rows()
row, err := rows.ReadRow(nil)
if err != nil {
t.Fatalf("reading row from parquet file: %v", err)
}
if len(row) != 1 {
t.Errorf("expected 1 value in row, got %d", len(row))
}
if !bytes.Equal(inputID[:], row[0].Bytes()) {
t.Errorf("expected to get UUID %q back out, got %q", inputID, row[0].Bytes())
}
}