forked from ClickHouse/clickhouse-go
/
date.go
80 lines (71 loc) · 1.57 KB
/
date.go
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package column
import (
"time"
"github.com/kshvakov/clickhouse/lib/binary"
)
type Date struct {
base
Timezone *time.Location
offset int64
}
func (dt *Date) Read(decoder *binary.Decoder) (interface{}, error) {
sec, err := decoder.Int16()
if err != nil {
return nil, err
}
return time.Unix(int64(sec)*24*3600-dt.offset, 0).In(dt.Timezone), nil
}
func (dt *Date) Write(encoder *binary.Encoder, v interface{}) error {
var timestamp int64
switch value := v.(type) {
case time.Time:
_, offset := value.Zone()
timestamp = value.Unix() + int64(offset)
case int16:
return encoder.Int16(value)
case int32:
timestamp = int64(value) + dt.offset
case int64:
timestamp = value + dt.offset
case string:
var err error
timestamp, err = dt.parse(value)
if err != nil {
return err
}
// this relies on Nullable never sending nil values through
case *time.Time:
_, offset := value.Zone()
timestamp = (*value).Unix() + int64(offset)
case *int16:
return encoder.Int16(*value)
case *int32:
timestamp = int64(*value) + dt.offset
case *int64:
timestamp = *value + dt.offset
case *string:
var err error
timestamp, err = dt.parse(*value)
if err != nil {
return err
}
default:
return &ErrUnexpectedType{
T: v,
Column: dt,
}
}
return encoder.Int16(int16(timestamp / 24 / 3600))
}
func (dt *Date) parse(value string) (int64, error) {
tv, err := time.Parse("2006-01-02", value)
if err != nil {
return 0, err
}
return time.Date(
time.Time(tv).Year(),
time.Time(tv).Month(),
time.Time(tv).Day(),
0, 0, 0, 0, time.UTC,
).Unix(), nil
}