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feat: compatible with postgres interval type (#2146)
* feat: impl ToSql/FromSql/ToSqlText for PgInterval. * chore: remove useless code. * feat: compatible with postgres interval type. * chore: cr comment.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| // Copyright 2023 Greptime Team | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| use std::fmt::Display; | ||
|
|
||
| use bytes::{Buf, BufMut}; | ||
| use common_time::Interval; | ||
| use pgwire::types::ToSqlText; | ||
| use postgres_types::{to_sql_checked, FromSql, IsNull, ToSql, Type}; | ||
|
|
||
| #[derive(Debug, Clone, Copy, Default)] | ||
| pub struct PgInterval { | ||
| months: i32, | ||
| days: i32, | ||
| microseconds: i64, | ||
| } | ||
|
|
||
| impl From<Interval> for PgInterval { | ||
| fn from(interval: Interval) -> Self { | ||
| let (months, days, nanos) = interval.to_month_day_nano(); | ||
| Self { | ||
| months, | ||
| days, | ||
| microseconds: nanos / 1000, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl From<PgInterval> for Interval { | ||
| fn from(interval: PgInterval) -> Self { | ||
| Interval::from_month_day_nano( | ||
| interval.months, | ||
| interval.days, | ||
| // Maybe overflow, but most scenarios ok. | ||
| interval.microseconds.checked_mul(1000).unwrap_or_else(|| { | ||
| if interval.microseconds.is_negative() { | ||
| i64::MIN | ||
| } else { | ||
| i64::MAX | ||
| } | ||
| }), | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| impl Display for PgInterval { | ||
| fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { | ||
| write!(f, "{}", Interval::from(*self).to_postgres_string()) | ||
| } | ||
| } | ||
|
|
||
| impl ToSql for PgInterval { | ||
| to_sql_checked!(); | ||
|
|
||
| fn to_sql( | ||
| &self, | ||
| _: &Type, | ||
| out: &mut bytes::BytesMut, | ||
| ) -> std::result::Result<postgres_types::IsNull, Box<dyn snafu::Error + Sync + Send>> | ||
| where | ||
| Self: Sized, | ||
| { | ||
| // https://github.com/postgres/postgres/blob/master/src/backend/utils/adt/timestamp.c#L989-L991 | ||
| out.put_i64(self.microseconds); | ||
| out.put_i32(self.days); | ||
| out.put_i32(self.months); | ||
| Ok(postgres_types::IsNull::No) | ||
| } | ||
|
|
||
| fn accepts(ty: &Type) -> bool | ||
| where | ||
| Self: Sized, | ||
| { | ||
| matches!(ty, &Type::INTERVAL) | ||
| } | ||
| } | ||
|
|
||
| impl<'a> FromSql<'a> for PgInterval { | ||
| fn from_sql( | ||
| _: &Type, | ||
| mut raw: &'a [u8], | ||
| ) -> std::result::Result<Self, Box<dyn snafu::Error + Sync + Send>> { | ||
| // https://github.com/postgres/postgres/blob/master/src/backend/utils/adt/timestamp.c#L1007-L1010 | ||
| let microseconds = raw.get_i64(); | ||
| let days = raw.get_i32(); | ||
| let months = raw.get_i32(); | ||
| Ok(PgInterval { | ||
| months, | ||
| days, | ||
| microseconds, | ||
| }) | ||
| } | ||
|
|
||
| fn accepts(ty: &Type) -> bool { | ||
| matches!(ty, &Type::INTERVAL) | ||
| } | ||
| } | ||
|
|
||
| impl ToSqlText for PgInterval { | ||
| fn to_sql_text( | ||
| &self, | ||
| ty: &Type, | ||
| out: &mut bytes::BytesMut, | ||
| ) -> std::result::Result<postgres_types::IsNull, Box<dyn snafu::Error + Sync + Send>> | ||
| where | ||
| Self: Sized, | ||
| { | ||
| let fmt = match ty { | ||
| &Type::INTERVAL => self.to_string(), | ||
| _ => return Err("unsupported type".into()), | ||
| }; | ||
|
|
||
| out.put_slice(fmt.as_bytes()); | ||
| Ok(IsNull::No) | ||
| } | ||
| } |