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Golang sqlbase.DatumToEncDatum函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了Golang中github.com/cockroachdb/cockroach/pkg/sql/sqlbase.DatumToEncDatum函数的典型用法代码示例。如果您正苦于以下问题：Golang DatumToEncDatum函数的具体用法？Golang DatumToEncDatum怎么用？Golang DatumToEncDatum使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了DatumToEncDatum函数的10个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: TestStreamEncodeDecode

// TestStreamEncodeDecode generates random streams of EncDatums and passes them
// through a StreamEncoder and a StreamDecoder
func TestStreamEncodeDecode(t *testing.T) {
	defer leaktest.AfterTest(t)()
	rng, _ := randutil.NewPseudoRand()
	for test := 0; test < 100; test++ {
		rowLen := 1 + rng.Intn(20)
		info := make([]DatumInfo, rowLen)
		for i := range info {
			info[i].Type = sqlbase.RandColumnType(rng)
			info[i].Encoding = sqlbase.RandDatumEncoding(rng)
		}
		numRows := rng.Intn(100)
		rows := make(sqlbase.EncDatumRows, numRows)
		for i := range rows {
			rows[i] = make(sqlbase.EncDatumRow, rowLen)
			for j := range rows[i] {
				rows[i][j] = sqlbase.DatumToEncDatum(info[j].Type,
					sqlbase.RandDatum(rng, info[j].Type, true))
			}
		}
		var trailerErr error
		if rng.Intn(10) == 0 {
			trailerErr = fmt.Errorf("test error %d", rng.Intn(100))
		}
		testRowStream(t, rng, rows, trailerErr)
	}
}
开发者ID:BramGruneir，项目名称:cockroach，代码行数:28，代码来源:stream_data_test.go


示例2: eval

func (ev *evaluator) eval(row sqlbase.EncDatumRow) (sqlbase.EncDatumRow, error) {
	outRow := ev.rowAlloc.AllocRow(len(ev.exprs))

	for i := range ev.exprs {
		datum, err := ev.exprs[i].eval(row)
		if err != nil {
			return nil, err
		}
		outRow[i] = sqlbase.DatumToEncDatum(ev.exprTypes[i], datum)
	}

	return outRow, nil
}
开发者ID:jmptrader，项目名称:cockroach，代码行数:13，代码来源:evaluator.go


示例3: TestMergeJoiner

func TestMergeJoiner(t *testing.T) {
	defer leaktest.AfterTest(t)()
	v := [6]sqlbase.EncDatum{}
	for i := range v {
		v[i] = sqlbase.DatumToEncDatum(sqlbase.ColumnType_INT, parser.NewDInt(parser.DInt(i)))
	}
	null := sqlbase.EncDatum{Datum: parser.DNull}

	testCases := []struct {
		spec     MergeJoinerSpec
		inputs   []sqlbase.EncDatumRows
		expected sqlbase.EncDatumRows
	}{
		{
			spec: MergeJoinerSpec{
				LeftOrdering: convertToSpecOrdering(
					sqlbase.ColumnOrdering{
						{ColIdx: 0, Direction: encoding.Ascending},
					}),
				LeftTypes: []sqlbase.ColumnType_Kind{
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
				},
				RightOrdering: convertToSpecOrdering(
					sqlbase.ColumnOrdering{
						{ColIdx: 0, Direction: encoding.Ascending},
					}),
				RightTypes: []sqlbase.ColumnType_Kind{
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
				},
				Type:          JoinType_INNER,
				OutputColumns: []uint32{0, 3, 4},
				// Implicit @1 = @3 constraint.
			},
			inputs: []sqlbase.EncDatumRows{
				{
					{v[0], v[0]},
					{v[1], v[4]},
					{v[2], v[4]},
					{v[3], v[1]},
					{v[4], v[5]},
					{v[5], v[5]},
				},
				{
					{v[1], v[0], v[4]},
					{v[3], v[4], v[1]},
					{v[4], v[4], v[5]},
				},
			},
			expected: sqlbase.EncDatumRows{
				{v[1], v[0], v[4]},
				{v[3], v[4], v[1]},
				{v[4], v[4], v[5]},
			},
		},
		{
			spec: MergeJoinerSpec{
				LeftOrdering: convertToSpecOrdering(
					sqlbase.ColumnOrdering{
						{ColIdx: 0, Direction: encoding.Ascending},
					}),
				LeftTypes: []sqlbase.ColumnType_Kind{
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
				},
				RightOrdering: convertToSpecOrdering(
					sqlbase.ColumnOrdering{
						{ColIdx: 0, Direction: encoding.Ascending},
					}),
				RightTypes: []sqlbase.ColumnType_Kind{
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
				},
				Type:          JoinType_INNER,
				OutputColumns: []uint32{0, 1, 3},
				// Implicit @1 = @3 constraint.
			},
			inputs: []sqlbase.EncDatumRows{
				{
					{v[0], v[0]},
					{v[0], v[1]},
				},
				{
					{v[0], v[4]},
					{v[0], v[1]},
					{v[0], v[0]},
					{v[0], v[5]},
					{v[0], v[4]},
				},
			},
			expected: sqlbase.EncDatumRows{
				{v[0], v[0], v[4]},
				{v[0], v[0], v[1]},
				{v[0], v[0], v[0]},
				{v[0], v[0], v[5]},
				{v[0], v[0], v[4]},
				{v[0], v[1], v[4]},
//.........这里部分代码省略.........
开发者ID:jmptrader，项目名称:cockroach，代码行数:101，代码来源:mergejoiner_test.go


示例4: TestHashJoiner

func TestHashJoiner(t *testing.T) {
	defer leaktest.AfterTest(t)()
	v := [10]sqlbase.EncDatum{}
	for i := range v {
		v[i] = sqlbase.DatumToEncDatum(sqlbase.ColumnType_INT, parser.NewDInt(parser.DInt(i)))
	}
	null := sqlbase.EncDatum{Datum: parser.DNull}

	testCases := []struct {
		spec     HashJoinerSpec
		inputs   []sqlbase.EncDatumRows
		expected sqlbase.EncDatumRows
	}{
		{
			spec: HashJoinerSpec{
				LeftEqColumns: []uint32{0},
				LeftTypes: []sqlbase.ColumnType_Kind{
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
				},
				RightEqColumns: []uint32{0},
				RightTypes: []sqlbase.ColumnType_Kind{
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
				},
				Type:          JoinType_INNER,
				OutputColumns: []uint32{0, 3, 4},
				// Implicit @1 = @3 constraint.
			},
			inputs: []sqlbase.EncDatumRows{
				{
					{v[0], v[0]},
					{v[1], v[4]},
					{v[2], v[4]},
					{v[3], v[1]},
					{v[4], v[5]},
					{v[5], v[5]},
				},
				{
					{v[1], v[0], v[4]},
					{v[3], v[4], v[1]},
					{v[4], v[4], v[5]},
				},
			},
			expected: sqlbase.EncDatumRows{
				{v[1], v[0], v[4]},
				{v[3], v[4], v[1]},
				{v[4], v[4], v[5]},
			},
		},
		{
			spec: HashJoinerSpec{
				LeftEqColumns: []uint32{0},
				LeftTypes: []sqlbase.ColumnType_Kind{
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
				},
				RightEqColumns: []uint32{0},
				RightTypes: []sqlbase.ColumnType_Kind{
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
				},
				Type:          JoinType_INNER,
				OutputColumns: []uint32{0, 1, 3},
				// Implicit @1 = @3 constraint.
			},
			inputs: []sqlbase.EncDatumRows{
				{
					{v[0], v[0]},
					{v[0], v[1]},
				},
				{
					{v[0], v[4]},
					{v[0], v[1]},
					{v[0], v[0]},
					{v[0], v[5]},
					{v[0], v[4]},
				},
			},
			expected: sqlbase.EncDatumRows{
				{v[0], v[0], v[4]},
				{v[0], v[0], v[1]},
				{v[0], v[0], v[0]},
				{v[0], v[0], v[5]},
				{v[0], v[0], v[4]},
				{v[0], v[1], v[4]},
				{v[0], v[1], v[1]},
				{v[0], v[1], v[0]},
				{v[0], v[1], v[5]},
				{v[0], v[1], v[4]},
			},
		},
		{
			spec: HashJoinerSpec{
				LeftEqColumns: []uint32{0},
				LeftTypes: []sqlbase.ColumnType_Kind{
					sqlbase.ColumnType_INT,
					sqlbase.ColumnType_INT,
//.........这里部分代码省略.........
开发者ID:maxlang，项目名称:cockroach，代码行数:101，代码来源:hashjoiner_test.go


示例5: TestJoinReader

func TestJoinReader(t *testing.T) {
	defer leaktest.AfterTest(t)()

	s, sqlDB, kvDB := serverutils.StartServer(t, base.TestServerArgs{})
	defer s.Stopper().Stop()

	// Create a table where each row is:
	//
	//  |     a    |     b    |         sum         |         s           |
	//  |-----------------------------------------------------------------|
	//  | rowId/10 | rowId%10 | rowId/10 + rowId%10 | IntToEnglish(rowId) |

	aFn := func(row int) parser.Datum {
		return parser.NewDInt(parser.DInt(row / 10))
	}
	bFn := func(row int) parser.Datum {
		return parser.NewDInt(parser.DInt(row % 10))
	}
	sumFn := func(row int) parser.Datum {
		return parser.NewDInt(parser.DInt(row/10 + row%10))
	}

	sqlutils.CreateTable(t, sqlDB, "t",
		"a INT, b INT, sum INT, s STRING, PRIMARY KEY (a,b), INDEX bs (b,s)",
		99,
		sqlutils.ToRowFn(aFn, bFn, sumFn, sqlutils.RowEnglishFn))

	td := sqlbase.GetTableDescriptor(kvDB, "test", "t")

	testCases := []struct {
		spec     JoinReaderSpec
		input    [][]parser.Datum
		expected string
	}{
		{
			spec: JoinReaderSpec{
				OutputColumns: []uint32{0, 1, 2},
			},
			input: [][]parser.Datum{
				{aFn(2), bFn(2)},
				{aFn(5), bFn(5)},
				{aFn(10), bFn(10)},
				{aFn(15), bFn(15)},
			},
			expected: "[[0 2 2] [0 5 5] [1 0 1] [1 5 6]]",
		},
		{
			spec: JoinReaderSpec{
				Filter:        Expression{Expr: "@3 <= 5"}, // sum <= 5
				OutputColumns: []uint32{3},
			},
			input: [][]parser.Datum{
				{aFn(1), bFn(1)},
				{aFn(25), bFn(25)},
				{aFn(5), bFn(5)},
				{aFn(21), bFn(21)},
				{aFn(34), bFn(34)},
				{aFn(13), bFn(13)},
				{aFn(51), bFn(51)},
				{aFn(50), bFn(50)},
			},
			expected: "[['one'] ['five'] ['two-one'] ['one-three'] ['five-zero']]",
		},
	}
	for _, c := range testCases {
		js := c.spec
		js.Table = *td

		flowCtx := FlowCtx{
			Context:  context.Background(),
			evalCtx:  &parser.EvalContext{},
			txnProto: &roachpb.Transaction{},
			clientDB: kvDB,
		}

		in := &RowBuffer{}
		for _, row := range c.input {
			encRow := make(sqlbase.EncDatumRow, len(row))
			for i, d := range row {
				encRow[i] = sqlbase.DatumToEncDatum(sqlbase.ColumnType{Kind: sqlbase.ColumnType_INT}, d)
			}
			in.rows = append(in.rows, encRow)
		}

		out := &RowBuffer{}
		jr, err := newJoinReader(&flowCtx, &js, in, out)
		if err != nil {
			t.Fatal(err)
		}

		jr.Run(nil)

		if out.err != nil {
			t.Fatal(out.err)
		}
		if !in.done {
			t.Fatal("joinReader stopped accepting rows")
		}
		if !out.closed {
			t.Fatalf("output RowReceiver not closed")
//.........这里部分代码省略.........
开发者ID:EvilMcJerkface，项目名称:cockroach，代码行数:101，代码来源:joinreader_test.go


示例6: TestSorter

func TestSorter(t *testing.T) {
	defer leaktest.AfterTest(t)()

	columnTypeInt := &sqlbase.ColumnType{Kind: sqlbase.ColumnType_INT}
	v := [6]sqlbase.EncDatum{}
	for i := range v {
		v[i] = sqlbase.DatumToEncDatum(*columnTypeInt, parser.NewDInt(parser.DInt(i)))
	}

	asc := encoding.Ascending
	desc := encoding.Descending

	testCases := []struct {
		spec     SorterSpec
		input    sqlbase.EncDatumRows
		expected sqlbase.EncDatumRows
	}{
		{
			// No specified input ordering and unspecified limit.
			spec: SorterSpec{
				OutputOrdering: convertToSpecOrdering(
					sqlbase.ColumnOrdering{
						{ColIdx: 0, Direction: asc},
						{ColIdx: 1, Direction: desc},
						{ColIdx: 2, Direction: asc},
					}),
			},
			input: sqlbase.EncDatumRows{
				{v[1], v[0], v[4]},
				{v[3], v[4], v[1]},
				{v[4], v[4], v[4]},
				{v[3], v[2], v[0]},
				{v[4], v[4], v[5]},
				{v[3], v[3], v[0]},
				{v[0], v[0], v[0]},
			},
			expected: sqlbase.EncDatumRows{
				{v[0], v[0], v[0]},
				{v[1], v[0], v[4]},
				{v[3], v[4], v[1]},
				{v[3], v[3], v[0]},
				{v[3], v[2], v[0]},
				{v[4], v[4], v[4]},
				{v[4], v[4], v[5]},
			},
		}, {
			// No specified input ordering but specified limit.
			spec: SorterSpec{
				Limit: 4,
				OutputOrdering: convertToSpecOrdering(
					sqlbase.ColumnOrdering{
						{ColIdx: 0, Direction: asc},
						{ColIdx: 1, Direction: asc},
						{ColIdx: 2, Direction: asc},
					}),
			},
			input: sqlbase.EncDatumRows{
				{v[3], v[3], v[0]},
				{v[3], v[4], v[1]},
				{v[1], v[0], v[4]},
				{v[0], v[0], v[0]},
				{v[4], v[4], v[4]},
				{v[4], v[4], v[5]},
				{v[3], v[2], v[0]},
			},
			expected: sqlbase.EncDatumRows{
				{v[0], v[0], v[0]},
				{v[1], v[0], v[4]},
				{v[3], v[2], v[0]},
				{v[3], v[3], v[0]},
			},
		}, {
			// Specified match ordering length but no specified limit.
			spec: SorterSpec{
				OrderingMatchLen: 2,
				OutputOrdering: convertToSpecOrdering(
					sqlbase.ColumnOrdering{
						{ColIdx: 0, Direction: asc},
						{ColIdx: 1, Direction: asc},
						{ColIdx: 2, Direction: asc},
					}),
			},
			input: sqlbase.EncDatumRows{
				{v[0], v[1], v[2]},
				{v[0], v[1], v[0]},
				{v[1], v[0], v[5]},
				{v[1], v[1], v[5]},
				{v[1], v[1], v[4]},
				{v[3], v[4], v[3]},
				{v[3], v[4], v[2]},
				{v[3], v[5], v[1]},
				{v[4], v[4], v[5]},
				{v[4], v[4], v[4]},
			},
			expected: sqlbase.EncDatumRows{
				{v[0], v[1], v[0]},
				{v[0], v[1], v[2]},
				{v[1], v[0], v[5]},
				{v[1], v[1], v[4]},
				{v[1], v[1], v[5]},
//.........这里部分代码省略.........
开发者ID:EvilMcJerkface，项目名称:cockroach，代码行数:101，代码来源:sorter_test.go


示例7: TestOrderedSync

func TestOrderedSync(t *testing.T) {
	defer leaktest.AfterTest(t)()

	columnTypeInt := &sqlbase.ColumnType{Kind: sqlbase.ColumnType_INT}
	v := [6]sqlbase.EncDatum{}
	for i := range v {
		v[i] = sqlbase.DatumToEncDatum(*columnTypeInt, parser.NewDInt(parser.DInt(i)))
	}

	asc := encoding.Ascending
	desc := encoding.Descending

	testCases := []struct {
		sources  []sqlbase.EncDatumRows
		ordering sqlbase.ColumnOrdering
		expected sqlbase.EncDatumRows
	}{
		{
			sources: []sqlbase.EncDatumRows{
				{
					{v[0], v[1], v[4]},
					{v[0], v[1], v[2]},
					{v[0], v[2], v[3]},
					{v[1], v[1], v[3]},
				},
				{
					{v[1], v[0], v[4]},
				},
				{
					{v[0], v[0], v[0]},
					{v[4], v[4], v[4]},
				},
			},
			ordering: sqlbase.ColumnOrdering{
				{ColIdx: 0, Direction: asc},
				{ColIdx: 1, Direction: asc},
			},
			expected: sqlbase.EncDatumRows{
				{v[0], v[0], v[0]},
				{v[0], v[1], v[4]},
				{v[0], v[1], v[2]},
				{v[0], v[2], v[3]},
				{v[1], v[0], v[4]},
				{v[1], v[1], v[3]},
				{v[4], v[4], v[4]},
			},
		},
		{
			sources: []sqlbase.EncDatumRows{
				{},
				{
					{v[1], v[0], v[4]},
				},
				{
					{v[3], v[4], v[1]},
					{v[4], v[4], v[4]},
					{v[3], v[2], v[0]},
				},
				{
					{v[4], v[4], v[5]},
					{v[3], v[3], v[0]},
					{v[0], v[0], v[0]},
				},
			},
			ordering: sqlbase.ColumnOrdering{
				{ColIdx: 1, Direction: desc},
				{ColIdx: 0, Direction: asc},
				{ColIdx: 2, Direction: asc},
			},
			expected: sqlbase.EncDatumRows{
				{v[3], v[4], v[1]},
				{v[4], v[4], v[4]},
				{v[4], v[4], v[5]},
				{v[3], v[3], v[0]},
				{v[3], v[2], v[0]},
				{v[0], v[0], v[0]},
				{v[1], v[0], v[4]},
			},
		},
	}
	for testIdx, c := range testCases {
		var sources []RowSource
		for _, srcRows := range c.sources {
			rowBuf := &RowBuffer{rows: srcRows}
			sources = append(sources, rowBuf)
		}
		src, err := makeOrderedSync(c.ordering, sources)
		if err != nil {
			t.Fatal(err)
		}
		var retRows sqlbase.EncDatumRows
		for {
			row, err := src.NextRow()
			if err != nil {
				t.Fatal(err)
			}
			if row == nil {
				break
			}
			retRows = append(retRows, row)
//.........这里部分代码省略.........
开发者ID:EvilMcJerkface，项目名称:cockroach，代码行数:101，代码来源:input_sync_test.go


示例8: TestUnorderedSync

func TestUnorderedSync(t *testing.T) {
	defer leaktest.AfterTest(t)()

	columnTypeInt := &sqlbase.ColumnType{Kind: sqlbase.ColumnType_INT}
	mrc := &MultiplexedRowChannel{}
	mrc.Init(5)
	for i := 1; i <= 5; i++ {
		go func(i int) {
			for j := 1; j <= 100; j++ {
				a := sqlbase.DatumToEncDatum(*columnTypeInt, parser.NewDInt(parser.DInt(i)))
				b := sqlbase.DatumToEncDatum(*columnTypeInt, parser.NewDInt(parser.DInt(j)))
				row := sqlbase.EncDatumRow{a, b}
				mrc.PushRow(row)
			}
			mrc.Close(nil)
		}(i)
	}
	var retRows sqlbase.EncDatumRows
	for {
		row, err := mrc.NextRow()
		if err != nil {
			t.Fatal(err)
		}
		if row == nil {
			break
		}
		retRows = append(retRows, row)
	}
	// Verify all elements.
	for i := 1; i <= 5; i++ {
		j := 1
		for _, row := range retRows {
			if int(*(row[0].Datum.(*parser.DInt))) == i {
				if int(*(row[1].Datum.(*parser.DInt))) != j {
					t.Errorf("Expected [%d %d], got %s", i, j, row)
				}
				j++
			}
		}
		if j != 101 {
			t.Errorf("Missing [%d %d]", i, j)
		}
	}

	// Test case when one source closes with an error.
	mrc = &MultiplexedRowChannel{}
	mrc.Init(5)
	for i := 1; i <= 5; i++ {
		go func(i int) {
			for j := 1; j <= 100; j++ {
				a := sqlbase.DatumToEncDatum(*columnTypeInt, parser.NewDInt(parser.DInt(i)))
				b := sqlbase.DatumToEncDatum(*columnTypeInt, parser.NewDInt(parser.DInt(j)))
				row := sqlbase.EncDatumRow{a, b}
				mrc.PushRow(row)
			}
			var err error
			if i == 3 {
				err = fmt.Errorf("Test error")
			}
			mrc.Close(err)
		}(i)
	}
	for {
		row, err := mrc.NextRow()
		if err != nil {
			if err.Error() != "Test error" {
				t.Error(err)
			}
			break
		}
		if row == nil {
			t.Error("Did not receive expected error")
		}
	}
}
开发者ID:EvilMcJerkface，项目名称:cockroach，代码行数:75，代码来源:input_sync_test.go


示例9: TestEvaluator

func TestEvaluator(t *testing.T) {
	defer leaktest.AfterTest(t)()

	columnTypeInt := &sqlbase.ColumnType{Kind: sqlbase.ColumnType_INT}
	columnTypeBool := &sqlbase.ColumnType{Kind: sqlbase.ColumnType_BOOL}
	v := [15]sqlbase.EncDatum{}
	for i := range v {
		v[i] = sqlbase.DatumToEncDatum(*columnTypeInt, parser.NewDInt(parser.DInt(i)))
	}

	b := [2]sqlbase.EncDatum{}
	b[0] = sqlbase.DatumToEncDatum(*columnTypeBool, parser.DBoolTrue)
	b[1] = sqlbase.DatumToEncDatum(*columnTypeBool, parser.DBoolFalse)

	nullInt := sqlbase.DatumToEncDatum(*columnTypeInt, parser.DNull)

	testCases := []struct {
		spec     EvaluatorSpec
		input    sqlbase.EncDatumRows
		expected sqlbase.EncDatumRows
	}{
		{
			spec: EvaluatorSpec{
				Exprs: []Expression{{Expr: "@2"}, {Expr: "(((@1)))"}},
			},
			input: sqlbase.EncDatumRows{
				{v[1], v[2]},
				{v[3], v[4]},
				{v[6], v[2]},
				{v[7], v[2]},
				{v[8], v[4]},
				{nullInt, nullInt},
			},
			expected: sqlbase.EncDatumRows{
				{v[2], v[1]},
				{v[4], v[3]},
				{v[2], v[6]},
				{v[2], v[7]},
				{v[4], v[8]},
				{nullInt, nullInt},
			},
		}, {
			spec: EvaluatorSpec{
				Exprs: []Expression{
					{Expr: "@1 + @2"},
					{Expr: "@1 - @2"},
					{Expr: "@1 >= 8"},
				},
			},
			input: sqlbase.EncDatumRows{
				{v[10], v[0]},
				{v[9], v[1]},
				{v[8], v[2]},
				{v[7], v[3]},
				{v[6], v[4]},
			},
			expected: sqlbase.EncDatumRows{
				{v[10], v[10], b[0]},
				{v[10], v[8], b[0]},
				{v[10], v[6], b[0]},
				{v[10], v[4], b[1]},
				{v[10], v[2], b[1]},
			},
		}, {
			spec: EvaluatorSpec{
				Exprs: []Expression{
					{Expr: "@1 AND @1"},
					{Expr: "@1 AND @2"},
					{Expr: "NOT @1"},
				},
			},
			input: sqlbase.EncDatumRows{
				{b[0], b[1]},
			},
			expected: sqlbase.EncDatumRows{
				{b[0], b[1], b[1]},
			},
		},
		{
			spec: EvaluatorSpec{
				Exprs: []Expression{{Expr: "1"}},
			},
			input: sqlbase.EncDatumRows{
				{v[1], v[2]},
				{v[3], v[4]},
				{v[6], v[2]},
				{v[7], v[2]},
				{v[8], v[4]},
			},
			expected: sqlbase.EncDatumRows{
				{v[1]},
				{v[1]},
				{v[1]},
				{v[1]},
				{v[1]},
			},
		},
	}

	for _, c := range testCases {
//.........这里部分代码省略.........
开发者ID:BramGruneir，项目名称:cockroach，代码行数:101，代码来源:evaluator_test.go


示例10: TestAggregator

// TODO(irfansharif): Add tests to verify the following aggregation functions:
//      AVG
//      BOOL_AND
//      BOOL_OR
//      CONCAT_AGG
//      STDDEV
//      VARIANCE
func TestAggregator(t *testing.T) {
	defer leaktest.AfterTest(t)()

	columnTypeInt := &sqlbase.ColumnType{Kind: sqlbase.ColumnType_INT}
	v := [15]sqlbase.EncDatum{}
	null := sqlbase.EncDatum{Datum: parser.DNull}
	for i := range v {
		v[i] = sqlbase.DatumToEncDatum(*columnTypeInt, parser.NewDInt(parser.DInt(i)))
	}

	testCases := []struct {
		spec     AggregatorSpec
		input    sqlbase.EncDatumRows
		expected sqlbase.EncDatumRows
	}{
		{
			// SELECT MIN(@0), MAX(@0), COUNT(@0), AVG(@0), SUM(@0), STDDEV(@0),
			// VARIANCE(@0) GROUP BY [] (no rows).
			spec: AggregatorSpec{
				Types: []*sqlbase.ColumnType{columnTypeInt},
				Exprs: []AggregatorSpec_Expr{
					{
						Func:   AggregatorSpec_MIN,
						ColIdx: 0,
					},
					{
						Func:   AggregatorSpec_MAX,
						ColIdx: 0,
					},
					{
						Func:   AggregatorSpec_COUNT,
						ColIdx: 0,
					},
					{
						Func:   AggregatorSpec_AVG,
						ColIdx: 0,
					},
					{
						Func:   AggregatorSpec_SUM,
						ColIdx: 0,
					},
					{
						Func:   AggregatorSpec_STDDEV,
						ColIdx: 0,
					},
					{
						Func:   AggregatorSpec_VARIANCE,
						ColIdx: 0,
					},
				},
			},
			input: sqlbase.EncDatumRows{},
			expected: sqlbase.EncDatumRows{
				{null, null, v[0], null, null, null, null},
			},
		},
		{
			// SELECT @2, COUNT(@1), GROUP BY @2.
			spec: AggregatorSpec{
				Types:     []*sqlbase.ColumnType{columnTypeInt, columnTypeInt},
				GroupCols: []uint32{1},
				Exprs: []AggregatorSpec_Expr{
					{
						Func:   AggregatorSpec_IDENT,
						ColIdx: 1,
					},
					{
						Func:   AggregatorSpec_COUNT,
						ColIdx: 0,
					},
				},
			},
			input: sqlbase.EncDatumRows{
				{v[1], v[2]},
				{v[3], null},
				{v[6], v[2]},
				{v[7], v[2]},
				{v[8], v[4]},
			},
			expected: sqlbase.EncDatumRows{
				{null, v[1]},
				{v[4], v[1]},
				{v[2], v[3]},
			},
		},
		{
			// SELECT @2, COUNT(@1), GROUP BY @2.
			spec: AggregatorSpec{
				Types:     []*sqlbase.ColumnType{columnTypeInt, columnTypeInt},
				GroupCols: []uint32{1},
				Exprs: []AggregatorSpec_Expr{
					{
						Func:   AggregatorSpec_IDENT,
//.........这里部分代码省略.........
开发者ID:EvilMcJerkface，项目名称:cockroach，代码行数:101，代码来源:aggregator_test.go



注：本文中的github.com/cockroachdb/cockroach/pkg/sql/sqlbase.DatumToEncDatum函数示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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