Golang driver.IsValue函数代码示例

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本文整理汇总了Golang中database/sql/driver.IsValue函数的典型用法代码示例。如果您正苦于以下问题：Golang IsValue函数的具体用法？Golang IsValue怎么用？Golang IsValue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IsValue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: driverArgs

// driverArgs 将Stmt.Exec和Stmt.Query的调用参数转换成为driver中定义的值。
//
// 若没有语句可用，则语句 ds 为 nil。
func driverArgs(ds *driverStmt, args []interface{}) ([]driver.Value, error) {
	dargs := make([]driver.Value, len(args))
	var si driver.Stmt
	if ds != nil {
		si = ds.si
	}
	cc, ok := si.(driver.ColumnConverter)

	// Normal path, for a driver.Stmt that is not a ColumnConverter.
	if !ok {
		for n, arg := range args {
			var err error
			dargs[n], err = driver.DefaultParameterConverter.ConvertValue(arg)
			if err != nil {
				return nil, fmt.Errorf("sql: converting Exec argument #%d's type: %v", n, err)
			}
		}
		return dargs, nil
	}

	// Let the Stmt convert its own arguments.
	for n, arg := range args {
		// First, see if the value itself knows how to convert
		// itself to a driver type.  For example, a NullString
		// struct changing into a string or nil.
		if svi, ok := arg.(driver.Valuer); ok {
			sv, err := svi.Value()
			if err != nil {
				return nil, fmt.Errorf("sql: argument index %d from Value: %v", n, err)
			}
			if !driver.IsValue(sv) {
				return nil, fmt.Errorf("sql: argument index %d: non-subset type %T returned from Value", n, sv)
			}
			arg = sv
		}

		// Second, ask the column to sanity check itself. For
		// example, drivers might use this to make sure that
		// an int64 values being inserted into a 16-bit
		// integer field is in range (before getting
		// truncated), or that a nil can't go into a NOT NULL
		// column before going across the network to get the
		// same error.
		var err error
		ds.Lock()
		dargs[n], err = cc.ColumnConverter(n).ConvertValue(arg)
		ds.Unlock()
		if err != nil {
			return nil, fmt.Errorf("sql: converting argument #%d's type: %v", n, err)
		}
		if !driver.IsValue(dargs[n]) {
			return nil, fmt.Errorf("sql: driver ColumnConverter error converted %T to unsupported type %T",
				arg, dargs[n])
		}
	}

	return dargs, nil
}

开发者ID:gmwu，项目名称:go，代码行数:61，代码来源:convert.go

示例2: argsMatches

func (e *queryBasedExpectation) argsMatches(args []driver.Value) error {
	if nil == e.args {
		return nil
	}
	if len(args) != len(e.args) {
		return fmt.Errorf("expected %d, but got %d arguments", len(e.args), len(args))
	}
	for k, v := range args {
		// custom argument matcher
		matcher, ok := e.args[k].(Argument)
		if ok {
			if !matcher.Match(v) {
				return fmt.Errorf("matcher %T could not match %d argument %T - %+v", matcher, k, args[k], args[k])
			}
			continue
		}

		// convert to driver converter
		darg, err := driver.DefaultParameterConverter.ConvertValue(e.args[k])
		if err != nil {
			return fmt.Errorf("could not convert %d argument %T - %+v to driver value: %s", k, e.args[k], e.args[k], err)
		}

		if !driver.IsValue(darg) {
			return fmt.Errorf("argument %d: non-subset type %T returned from Value", k, darg)
		}

		if !reflect.DeepEqual(darg, args[k]) {
			return fmt.Errorf("argument %d expected [%T - %+v] does not match actual [%T - %+v]", k, darg, darg, args[k], args[k])
		}
	}
	return nil
}

开发者ID:roman-vynar，项目名称:mysqld_exporter，代码行数:33，代码来源:expectations.go

示例3: ConvertValue

func (converter) ConvertValue(v interface{}) (driver.Value, error) {
	if driver.IsValue(v) {
		return v, nil
	}

	rv := reflect.ValueOf(v)
	switch rv.Kind() {
	case reflect.Ptr:
		// indirect pointers
		if rv.IsNil() {
			return nil, nil
		}
		return driver.DefaultParameterConverter.ConvertValue(rv.Elem().Interface())
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return rv.Int(), nil
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32:
		return int64(rv.Uint()), nil
	case reflect.Uint64:
		u64 := rv.Uint()
		if u64 >= 1<<63 {
			return fmt.Sprintf("%d", u64), nil
		}
		return int64(u64), nil
	case reflect.Float32, reflect.Float64:
		return rv.Float(), nil
	}
	return nil, fmt.Errorf("unsupported type %T, a %s", v, rv.Kind())
}

开发者ID:useidel，项目名称:notary，代码行数:28，代码来源:statement.go

示例4: driverArgs

func driverArgs(ds *driverStmt, args []interface{}) ([]driver.Value, error) {
	dargs := make([]driver.Value, len(args))
	var si dirver.Stmt
	if ds != nil {
		si = ds.si

	}
	cc, ok := si.(driver.ColumnConverter)

	if !ok {
		for n, arg := range args {
			var err error
			vargs[n], err = driver.DefaultParameterConverter.ConvertValue(arg)
			if err != nil {
				return nil, fmt.Errorf("sql :converting Exec argument #%d's type :%v", n, err)
			}
		}
	}
	for n, arg := range args {
		if svi, ok := arg(driver.Valuer); ok {
			if err != nil {
				return nil, fmt.Errorf("sql:argument index %d from Value:%v", n, err)
			}
			if !driver.IsValue(sv) {
				return nil, fmt.Errorf("sql: argument index %d:non-subset type %T retruned from value", n, sv)
			}
			arg = sv
		}

		var err error
		ds.lock()
		dargs[n], err = cc.ColumnConverter(n).ConvertValue(arg)
		ds.Unlock()
		if err != nil {
			return nil, fmt.Errorf("sql: vonverting argument #%d's type :%v", n, err)
		}
		if !driver.IsValue(dargs[n]) {
			return nil, fmt.Errorf("sql :driver ColumnConverter error vonverted  %T to unsupported type %T", arg, dargs[n])
		}

	}

	return dargs, nil
}

开发者ID:zbzzbd，项目名称:go，代码行数:44，代码来源:convert_test.go

示例5: Value

// Value implements the driver.Valuer interface.
func (d Datum) Value() (driver.Value, error) {
	var val driver.Value

	switch t := d.Payload.(type) {
	case *Datum_BoolVal:
		val = t.BoolVal
	case *Datum_IntVal:
		val = t.IntVal
	case *Datum_FloatVal:
		val = t.FloatVal
	case *Datum_BytesVal:
		val = t.BytesVal
	case *Datum_StringVal:
		val = t.StringVal
	case *Datum_TimeVal:
		val = t.TimeVal.GoTime().UTC()
	}

	if driver.IsValue(val) {
		return val, nil
	}
	return nil, util.Errorf("unsupported type %T", val)
}

开发者ID:harryyeh，项目名称:cockroach，代码行数:24，代码来源:wire.go

示例6: Value

// Value implements the driver.Valuer interface.
func (d Datum) Value() (driver.Value, error) {
	val := d.GetValue()

	switch t := val.(type) {
	case *bool:
		val = *t
	case *int64:
		val = *t
	case *float64:
		val = *t
	case []byte:
		val = t
	case *string:
		val = *t
	case *Datum_Timestamp:
		val = time.Unix((*t).Sec, int64((*t).Nsec)).UTC()
	}

	if driver.IsValue(val) {
		return val, nil
	}
	return nil, util.Errorf("unsupported type %T", val)
}

开发者ID:husttom，项目名称:cockroach，代码行数:24，代码来源:wire.go

示例7: valuesToStrings

func valuesToStrings(args []driver.Value) []string {
	strargs := make([]string, len(args))
	for i, valarg := range args {
		ogl.Debugf("valarg: %T: %v; isValue=%v\n", valarg, valarg, driver.IsValue(valarg)) // DEBUG
		switch valarg.(type) {
		case string:
			strargs[i] = valarg.(string)
		case int64:
			strargs[i] = strconv.FormatInt(valarg.(int64), 10)
		case float64:
			strargs[i] = strconv.FormatFloat(valarg.(float64), 'f', -1, 10)
		case bool:
			strargs[i] = strconv.FormatBool(valarg.(bool))
		case []byte:
			strargs[i] = string(valarg.([]byte))
		case time.Time:
			strargs[i] = valarg.(time.Time).String() // TODO: this is probably not the format we want -> fix it later
		default:
			_, file, line, _ := runtime.Caller(0)
			ogl.Warn(fmt.Sprintf("Unexpected type in ogonoriConn#Exec: %T. (%s:%d)", valarg, file, line))
		}
	}
	return strargs
}

开发者ID:harveymonster，项目名称:ogonori，代码行数:24，代码来源:conn.go

示例8: Exec

// Exec executes a prepared statement with the given arguments and
// returns a Result summarizing the effect of the statement.
func (s *Stmt) Exec(args ...interface{}) (Result, error) {
	_, releaseConn, si, err := s.connStmt()
	if err != nil {
		return nil, err
	}
	defer releaseConn(nil)

	// -1 means the driver doesn't know how to count the number of
	// placeholders, so we won't sanity check input here and instead let the
	// driver deal with errors.
	if want := si.NumInput(); want != -1 && len(args) != want {
		return nil, fmt.Errorf("sql: expected %d arguments, got %d", want, len(args))
	}

	sargs := make([]driver.Value, len(args))

	// Convert args to subset types.
	if cc, ok := si.(driver.ColumnConverter); ok {
		for n, arg := range args {
			// First, see if the value itself knows how to convert
			// itself to a driver type.  For example, a NullString
			// struct changing into a string or nil.
			if svi, ok := arg.(driver.Valuer); ok {
				sv, err := svi.Value()
				if err != nil {
					return nil, fmt.Errorf("sql: argument index %d from Value: %v", n, err)
				}
				if !driver.IsValue(sv) {
					return nil, fmt.Errorf("sql: argument index %d: non-subset type %T returned from Value", n, sv)
				}
				arg = sv
			}

			// Second, ask the column to sanity check itself. For
			// example, drivers might use this to make sure that
			// an int64 values being inserted into a 16-bit
			// integer field is in range (before getting
			// truncated), or that a nil can't go into a NOT NULL
			// column before going across the network to get the
			// same error.
			sargs[n], err = cc.ColumnConverter(n).ConvertValue(arg)
			if err != nil {
				return nil, fmt.Errorf("sql: converting Exec argument #%d's type: %v", n, err)
			}
			if !driver.IsValue(sargs[n]) {
				return nil, fmt.Errorf("sql: driver ColumnConverter error converted %T to unsupported type %T",
					arg, sargs[n])
			}
		}
	} else {
		for n, arg := range args {
			sargs[n], err = driver.DefaultParameterConverter.ConvertValue(arg)
			if err != nil {
				return nil, fmt.Errorf("sql: converting Exec argument #%d's type: %v", n, err)
			}
		}
	}

	resi, err := si.Exec(sargs)
	if err != nil {
		return nil, err
	}
	return result{resi}, nil
}

开发者ID:anuvazhayil，项目名称:HelloWorld_32bitOS，代码行数:66，代码来源:sql.go

示例9: ConvertValue

func (cv CypherValue) ConvertValue(v interface{}) (driver.Value, error) {
	if driver.IsValue(v) {
		return v, nil
	}

	if svi, ok := v.(driver.Valuer); ok {
		sv, err := svi.Value()
		if err != nil {
			return nil, err
		}
		if !driver.IsValue(sv) {
			return nil, fmt.Errorf("non-Value type %T returned from Value", sv)
		}
		return sv, nil
	}

	rv := reflect.ValueOf(v)
	switch rv.Kind() {
	case reflect.Slice:
		b := CypherValue{}
		switch v.(type) {
		case []int:
			b.Type = CypherArrayInt
			b.Val = v
		case []int64:
			b.Type = CypherArrayInt64
			b.Val = v
		case []float64:
			b.Type = CypherArrayFloat64
			b.Val = v
		case []string:
			b.Type = CypherArrayString
			b.Val = v
		}
		return b.Value()
	case reflect.Map:
		b := CypherValue{}
		switch v.(type) {
		case map[string]string:
			b.Type = CypherMapStringString
			b.Val = v
		case map[string]CypherValue:
			b.Type = CypherMapStringCypherValue
			b.Val = v
		}
		return b.Value()
	case reflect.Ptr:
		// indirect pointers
		if rv.IsNil() {
			return nil, nil
		}
		return CypherValue{}.ConvertValue(rv.Elem().Interface())
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return rv.Int(), nil
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32:
		return int64(rv.Uint()), nil
	case reflect.Uint64:
		u64 := rv.Uint()
		if u64 >= 1<<63 {
			return nil, fmt.Errorf("uint64 values with high bit set are not supported")
		}
		return int64(u64), nil
	case reflect.Float32, reflect.Float64:
		return rv.Float(), nil
	}
	return nil, fmt.Errorf("unsupported type %T, a %s", v, rv.Kind())
}

开发者ID:slowteetoe，项目名称:presagio，代码行数:67，代码来源:cyphervalue.go

示例10: driverArgs

// driverArgs converts arguments from callers of Stmt.Exec and
// Stmt.Query into driver Values.
//
// The statement ds may be nil, if no statement is available.
func driverArgs(ds *driverStmt, args []interface{}) ([]driver.NamedValue, error) {
	nvargs := make([]driver.NamedValue, len(args))
	var si driver.Stmt
	if ds != nil {
		si = ds.si
	}
	cc, ok := si.(driver.ColumnConverter)

	// Normal path, for a driver.Stmt that is not a ColumnConverter.
	if !ok {
		for n, arg := range args {
			var err error
			nv := &nvargs[n]
			nv.Ordinal = n + 1
			if np, ok := arg.(NamedArg); ok {
				if err := validateNamedValueName(np.Name); err != nil {
					return nil, err
				}
				arg = np.Value
				nvargs[n].Name = np.Name
			}
			nv.Value, err = driver.DefaultParameterConverter.ConvertValue(arg)

			if err != nil {
				return nil, fmt.Errorf("sql: converting Exec argument %s type: %v", describeNamedValue(nv), err)
			}
		}
		return nvargs, nil
	}

	// Let the Stmt convert its own arguments.
	for n, arg := range args {
		nv := &nvargs[n]
		nv.Ordinal = n + 1
		if np, ok := arg.(NamedArg); ok {
			if err := validateNamedValueName(np.Name); err != nil {
				return nil, err
			}
			arg = np.Value
			nv.Name = np.Name
		}
		// First, see if the value itself knows how to convert
		// itself to a driver type. For example, a NullString
		// struct changing into a string or nil.
		if vr, ok := arg.(driver.Valuer); ok {
			sv, err := callValuerValue(vr)
			if err != nil {
				return nil, fmt.Errorf("sql: argument %s from Value: %v", describeNamedValue(nv), err)
			}
			if !driver.IsValue(sv) {
				return nil, fmt.Errorf("sql: argument %s: non-subset type %T returned from Value", describeNamedValue(nv), sv)
			}
			arg = sv
		}

		// Second, ask the column to sanity check itself. For
		// example, drivers might use this to make sure that
		// an int64 values being inserted into a 16-bit
		// integer field is in range (before getting
		// truncated), or that a nil can't go into a NOT NULL
		// column before going across the network to get the
		// same error.
		var err error
		ds.Lock()
		nv.Value, err = cc.ColumnConverter(n).ConvertValue(arg)
		ds.Unlock()
		if err != nil {
			return nil, fmt.Errorf("sql: converting argument %s type: %v", describeNamedValue(nv), err)
		}
		if !driver.IsValue(nv.Value) {
			return nil, fmt.Errorf("sql: for argument %s, driver ColumnConverter error converted %T to unsupported type %T",
				describeNamedValue(nv), arg, nv.Value)
		}
	}

	return nvargs, nil
}

开发者ID:oshimaya，项目名称:go，代码行数:81，代码来源:convert.go

注：本文中的database/sql/driver.IsValue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。