/
datetime64.go
100 lines (86 loc) · 1.83 KB
/
datetime64.go
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package column
import (
"math"
"strconv"
"strings"
"time"
"github.com/ClickHouse/clickhouse-go/lib/binary"
)
type DateTime64 struct {
base
Timezone *time.Location
}
func (dt *DateTime64) Read(decoder *binary.Decoder, isNull bool) (interface{}, error) {
value, err := decoder.Int64()
if err != nil {
return nil, err
}
precision, err := dt.getPrecision()
if err != nil {
return nil, err
}
var nano int64
if precision < 19 {
nano = value * int64(math.Pow10(9-precision))
}
sec := nano / int64(10e8)
nsec := nano - sec*10e8
return time.Unix(sec, nsec).In(dt.Timezone), nil
}
func (dt *DateTime64) Write(encoder *binary.Encoder, v interface{}) error {
var timestamp int64
switch value := v.(type) {
case time.Time:
if !value.IsZero() {
timestamp = value.UnixNano()
}
case uint64:
timestamp = int64(value)
case int64:
timestamp = value
case string:
var err error
timestamp, err = dt.parse(value)
if err != nil {
return err
}
case *time.Time:
if value != nil && !(*value).IsZero() {
timestamp = (*value).UnixNano()
}
case *int64:
timestamp = *value
case *string:
var err error
timestamp, err = dt.parse(*value)
if err != nil {
return err
}
default:
return &ErrUnexpectedType{
T: v,
Column: dt,
}
}
precision, err := dt.getPrecision()
if err != nil {
return err
}
timestamp = timestamp / int64(math.Pow10(9-precision))
return encoder.Int64(timestamp)
}
func (dt *DateTime64) parse(value string) (int64, error) {
tv, err := time.Parse("2006-01-02 15:04:05.999", value)
if err != nil {
return 0, err
}
return tv.UnixNano(), nil
}
func (dt *DateTime64) getPrecision() (int, error) {
dtParams := dt.base.chType[11 : len(dt.base.chType)-1]
precision, err := strconv.Atoi(strings.Split(dtParams, ",")[0])
if err != nil {
return 0, err
}
return precision, nil
}