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tablecodec_test.go
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// Copyright 2016 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package tablecodec
import (
"math"
"testing"
"time"
. "github.com/pingcap/check"
"github.com/pingcap/tidb/mysql"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/types"
"github.com/pingcap/tidb/util/codec"
"github.com/pingcap/tidb/util/testleak"
)
func TestT(t *testing.T) {
TestingT(t)
}
var _ = Suite(&testTableCodecSuite{})
type testTableCodecSuite struct{}
// TestTableCodec tests some functions in package tablecodec
// TODO: add more tests.
func (s *testTableCodecSuite) TestTableCodec(c *C) {
defer testleak.AfterTest(c)()
key := EncodeRowKey(1, codec.EncodeInt(nil, 2))
h, err := DecodeRowKey(key)
c.Assert(err, IsNil)
c.Assert(h, Equals, int64(2))
key = EncodeRowKeyWithHandle(1, 2)
h, err = DecodeRowKey(key)
c.Assert(err, IsNil)
c.Assert(h, Equals, int64(2))
}
// column is a structure used for test
type column struct {
id int64
tp *types.FieldType
}
func (s *testTableCodecSuite) TestRowCodec(c *C) {
defer testleak.AfterTest(c)()
c1 := &column{id: 1, tp: types.NewFieldType(mysql.TypeLonglong)}
c2 := &column{id: 2, tp: types.NewFieldType(mysql.TypeVarchar)}
c3 := &column{id: 3, tp: types.NewFieldType(mysql.TypeNewDecimal)}
cols := []*column{c1, c2, c3}
row := make([]types.Datum, 3)
row[0] = types.NewIntDatum(100)
row[1] = types.NewBytesDatum([]byte("abc"))
row[2] = types.NewDecimalDatum(types.NewDecFromInt(1))
// Encode
colIDs := make([]int64, 0, 3)
for _, col := range cols {
colIDs = append(colIDs, col.id)
}
bs, err := EncodeRow(row, colIDs, time.Local)
c.Assert(err, IsNil)
c.Assert(bs, NotNil)
// Decode
colMap := make(map[int64]*types.FieldType, 3)
for _, col := range cols {
colMap[col.id] = col.tp
}
r, err := DecodeRow(bs, colMap, time.Local)
c.Assert(err, IsNil)
c.Assert(r, NotNil)
c.Assert(r, HasLen, 3)
sc := new(variable.StatementContext)
// Compare decoded row and original row
for i, col := range cols {
v, ok := r[col.id]
c.Assert(ok, IsTrue)
equal, err1 := v.CompareDatum(sc, &row[i])
c.Assert(err1, IsNil)
c.Assert(equal, Equals, 0)
}
// colMap may contains more columns than encoded row.
colMap[4] = types.NewFieldType(mysql.TypeFloat)
r, err = DecodeRow(bs, colMap, time.Local)
c.Assert(err, IsNil)
c.Assert(r, NotNil)
c.Assert(r, HasLen, 3)
for i, col := range cols {
v, ok := r[col.id]
c.Assert(ok, IsTrue)
equal, err1 := v.CompareDatum(sc, &row[i])
c.Assert(err1, IsNil)
c.Assert(equal, Equals, 0)
}
// colMap may contains less columns than encoded row.
delete(colMap, 3)
delete(colMap, 4)
r, err = DecodeRow(bs, colMap, time.Local)
c.Assert(err, IsNil)
c.Assert(r, NotNil)
c.Assert(r, HasLen, 2)
for i, col := range cols {
if i > 1 {
break
}
v, ok := r[col.id]
c.Assert(ok, IsTrue)
equal, err1 := v.CompareDatum(sc, &row[i])
c.Assert(err1, IsNil)
c.Assert(equal, Equals, 0)
}
// Make sure empty row return not nil value.
bs, err = EncodeRow([]types.Datum{}, []int64{}, time.Local)
c.Assert(err, IsNil)
c.Assert(bs, HasLen, 1)
r, err = DecodeRow(bs, colMap, time.Local)
c.Assert(err, IsNil)
c.Assert(r, IsNil)
}
func (s *testTableCodecSuite) TestTimeCodec(c *C) {
defer testleak.AfterTest(c)()
c1 := &column{id: 1, tp: types.NewFieldType(mysql.TypeLonglong)}
c2 := &column{id: 2, tp: types.NewFieldType(mysql.TypeVarchar)}
c3 := &column{id: 3, tp: types.NewFieldType(mysql.TypeTimestamp)}
c4 := &column{id: 4, tp: types.NewFieldType(mysql.TypeDuration)}
cols := []*column{c1, c2, c3, c4}
colLen := len(cols)
row := make([]types.Datum, colLen)
row[0] = types.NewIntDatum(100)
row[1] = types.NewBytesDatum([]byte("abc"))
ts, err := types.ParseTimestamp(nil, "2016-06-23 11:30:45")
c.Assert(err, IsNil)
row[2] = types.NewDatum(ts)
du, err := types.ParseDuration("12:59:59.999999", 6)
c.Assert(err, IsNil)
row[3] = types.NewDatum(du)
// Encode
colIDs := make([]int64, 0, colLen)
for _, col := range cols {
colIDs = append(colIDs, col.id)
}
bs, err := EncodeRow(row, colIDs, time.Local)
c.Assert(err, IsNil)
c.Assert(bs, NotNil)
// Decode
colMap := make(map[int64]*types.FieldType, colLen)
for _, col := range cols {
colMap[col.id] = col.tp
}
r, err := DecodeRow(bs, colMap, time.Local)
c.Assert(err, IsNil)
c.Assert(r, NotNil)
c.Assert(r, HasLen, colLen)
sc := new(variable.StatementContext)
// Compare decoded row and original row
for i, col := range cols {
v, ok := r[col.id]
c.Assert(ok, IsTrue)
equal, err1 := v.CompareDatum(sc, &row[i])
c.Assert(err1, IsNil)
c.Assert(equal, Equals, 0)
}
}
func (s *testTableCodecSuite) TestCutRow(c *C) {
defer testleak.AfterTest(c)()
var err error
c1 := &column{id: 1, tp: types.NewFieldType(mysql.TypeLonglong)}
c2 := &column{id: 2, tp: types.NewFieldType(mysql.TypeVarchar)}
c3 := &column{id: 3, tp: types.NewFieldType(mysql.TypeNewDecimal)}
cols := []*column{c1, c2, c3}
row := make([]types.Datum, 3)
row[0] = types.NewIntDatum(100)
row[1] = types.NewBytesDatum([]byte("abc"))
row[2] = types.NewDecimalDatum(types.NewDecFromInt(1))
data := make([][]byte, 3)
data[0], err = EncodeValue(row[0], time.Local)
c.Assert(err, IsNil)
data[1], err = EncodeValue(row[1], time.Local)
c.Assert(err, IsNil)
data[2], err = EncodeValue(row[2], time.Local)
c.Assert(err, IsNil)
// Encode
colIDs := make([]int64, 0, 3)
for _, col := range cols {
colIDs = append(colIDs, col.id)
}
bs, err := EncodeRow(row, colIDs, time.Local)
c.Assert(err, IsNil)
c.Assert(bs, NotNil)
// Decode
colMap := make(map[int64]int, 3)
for i, col := range cols {
colMap[col.id] = i
}
r, err := CutRowNew(bs, colMap)
c.Assert(err, IsNil)
c.Assert(r, NotNil)
c.Assert(r, HasLen, 3)
// Compare cut row and original row
for i := range colIDs {
c.Assert(r[i], DeepEquals, data[i])
}
}
func (s *testTableCodecSuite) TestCutKeyNew(c *C) {
values := []types.Datum{types.NewIntDatum(1), types.NewBytesDatum([]byte("abc")), types.NewFloat64Datum(5.5)}
handle := types.NewIntDatum(100)
values = append(values, handle)
encodedValue, err := codec.EncodeKey(nil, values...)
c.Assert(err, IsNil)
tableID := int64(4)
indexID := int64(5)
indexKey := EncodeIndexSeekKey(tableID, indexID, encodedValue)
valuesBytes, handleBytes, err := CutIndexKeyNew(indexKey, 3)
c.Assert(err, IsNil)
for i := 0; i < 3; i++ {
valueBytes := valuesBytes[i]
var val types.Datum
_, val, _ = codec.DecodeOne(valueBytes)
c.Assert(val, DeepEquals, values[i])
}
_, handleVal, _ := codec.DecodeOne(handleBytes)
c.Assert(handleVal, DeepEquals, types.NewIntDatum(100))
}
func (s *testTableCodecSuite) TestCutKey(c *C) {
colIDs := []int64{1, 2, 3}
values := []types.Datum{types.NewIntDatum(1), types.NewBytesDatum([]byte("abc")), types.NewFloat64Datum(5.5)}
handle := types.NewIntDatum(100)
values = append(values, handle)
encodedValue, err := codec.EncodeKey(nil, values...)
c.Assert(err, IsNil)
tableID := int64(4)
indexID := int64(5)
indexKey := EncodeIndexSeekKey(tableID, indexID, encodedValue)
valuesMap, handleBytes, err := CutIndexKey(indexKey, colIDs)
c.Assert(err, IsNil)
for i, colID := range colIDs {
valueBytes := valuesMap[colID]
var val types.Datum
_, val, _ = codec.DecodeOne(valueBytes)
c.Assert(val, DeepEquals, values[i])
}
_, handleVal, _ := codec.DecodeOne(handleBytes)
c.Assert(handleVal, DeepEquals, types.NewIntDatum(100))
}
func (s *testTableCodecSuite) TestIndexKey(c *C) {
tableID := int64(4)
indexID := int64(5)
indexKey := EncodeIndexSeekKey(tableID, indexID, []byte{})
tTableID, tIndexID, isRecordKey, err := DecodeKeyHead(indexKey)
c.Assert(err, IsNil)
c.Assert(tTableID, Equals, tableID)
c.Assert(tIndexID, Equals, indexID)
c.Assert(isRecordKey, IsFalse)
}
func (s *testTableCodecSuite) TestRecordKey(c *C) {
tableID := int64(55)
tableKey := EncodeRowKeyWithHandle(tableID, math.MaxUint32)
tTableID, _, isRecordKey, err := DecodeKeyHead(tableKey)
c.Assert(err, IsNil)
c.Assert(tTableID, Equals, tableID)
c.Assert(isRecordKey, IsTrue)
}