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function_time.go
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function_time.go
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package internal
import (
"fmt"
"time"
)
func CURRENT_TIME(zone string) (Value, error) {
loc, err := toLocation(zone)
if err != nil {
return nil, err
}
return CURRENT_TIME_WITH_TIME(time.Now().In(loc))
}
func CURRENT_TIME_WITH_TIME(v time.Time) (Value, error) {
return TimeValue(v), nil
}
func TIME(args ...Value) (Value, error) {
if len(args) == 3 {
hour, err := args[0].ToInt64()
if err != nil {
return nil, err
}
min, err := args[1].ToInt64()
if err != nil {
return nil, err
}
sec, err := args[2].ToInt64()
if err != nil {
return nil, err
}
loc, err := toLocation("")
if err != nil {
return nil, err
}
return TimeValue(time.Date(0, 0, 0, int(hour), int(min), int(sec), 0, loc)), nil
}
if len(args) != 1 && len(args) != 2 {
return nil, fmt.Errorf("TIME: invalid argument num %d", len(args))
}
switch args[0].(type) {
case TimestampValue:
t, err := args[0].ToTime()
if err != nil {
return nil, err
}
if len(args) == 2 {
zone, err := args[1].ToString()
if err != nil {
return nil, err
}
loc, err := toLocation(zone)
if err != nil {
return nil, err
}
return TimeValue(t.In(loc)), nil
}
return TimeValue(t), nil
case DatetimeValue:
t, err := args[0].ToTime()
if err != nil {
return nil, err
}
return TimeValue(t), nil
}
return nil, fmt.Errorf("TIME: invalid first argument type %T", args[0])
}
func TIME_ADD(t time.Time, v int64, part string) (Value, error) {
switch part {
case "MICROSECOND":
return TimeValue(t.Add(time.Duration(v) * time.Microsecond)), nil
case "MILLISECOND":
return TimeValue(t.Add(time.Duration(v) * time.Millisecond)), nil
case "SECOND":
return TimeValue(t.Add(time.Duration(v) * time.Second)), nil
case "MINUTE":
return TimeValue(t.Add(time.Duration(v) * time.Minute)), nil
case "HOUR":
return TimeValue(t.Add(time.Duration(v) * time.Hour)), nil
}
return nil, fmt.Errorf("TIME_ADD: unexpected part value %s", part)
}
func TIME_SUB(t time.Time, v int64, part string) (Value, error) {
switch part {
case "MICROSECOND":
return TimeValue(t.Add(-time.Duration(v) * time.Microsecond)), nil
case "MILLISECOND":
return TimeValue(t.Add(-time.Duration(v) * time.Millisecond)), nil
case "SECOND":
return TimeValue(t.Add(-time.Duration(v) * time.Second)), nil
case "MINUTE":
return TimeValue(t.Add(-time.Duration(v) * time.Minute)), nil
case "HOUR":
return TimeValue(t.Add(-time.Duration(v) * time.Hour)), nil
}
return nil, fmt.Errorf("TIME_SUB: unexpected part value %s", part)
}
func TIME_DIFF(a, b time.Time, part string) (Value, error) {
diff := a.Sub(b)
switch part {
case "MICROSECOND":
return IntValue(diff / time.Microsecond), nil
case "MILLISECOND":
return IntValue(diff / time.Millisecond), nil
case "SECOND":
return IntValue(diff / time.Second), nil
case "MINUTE":
return IntValue(diff / time.Minute), nil
case "HOUR":
return IntValue(diff / time.Hour), nil
}
return nil, fmt.Errorf("TIME_DIFF: unexpected part value %s", part)
}
func TIME_TRUNC(t time.Time, part string) (Value, error) {
switch part {
case "MICROSECOND":
return TimeValue(t), nil
case "MILLISECOND":
sec := time.Duration(t.Second()) - time.Duration(t.Second())/time.Microsecond
return TimeValue(time.Date(
t.Year(),
t.Month(),
t.Day(),
t.Hour(),
t.Minute(),
int(sec),
0,
t.Location(),
)), nil
case "SECOND":
sec := time.Duration(t.Second()) / time.Second
return TimeValue(time.Date(
t.Year(),
t.Month(),
t.Day(),
t.Hour(),
t.Minute(),
int(sec),
0,
t.Location(),
)), nil
case "MINUTE":
return TimeValue(time.Date(
t.Year(),
t.Month(),
t.Day(),
t.Hour(),
t.Minute(),
0,
0,
t.Location(),
)), nil
case "HOUR":
return TimeValue(time.Date(
t.Year(),
t.Month(),
t.Day(),
t.Hour(),
0,
0,
0,
t.Location(),
)), nil
}
return nil, fmt.Errorf("TIME_TRUNC: unexpected part value %s", part)
}
func FORMAT_TIME(format string, t time.Time) (Value, error) {
s, err := formatTime(format, &t, FormatTypeTime)
if err != nil {
return nil, err
}
return StringValue(s), nil
}
func PARSE_TIME(format, date string) (Value, error) {
t, err := parseTimeFormat(format, date, FormatTypeTime)
if err != nil {
return nil, err
}
return TimeValue(*t), nil
}