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