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| mod cursor_ext; | ||
| pub mod error; | ||
| pub mod raw_rows; | ||
| pub mod rows; | ||
| pub mod schema; | ||
| pub mod value; | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,142 @@ | ||
| // Copyright 2021 Datafuse Labs | ||
| // | ||
| // 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. | ||
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| use std::pin::Pin; | ||
| use std::task::Context; | ||
| use std::task::Poll; | ||
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| use tokio_stream::{Stream, StreamExt}; | ||
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| use crate::error::Result; | ||
| use crate::rows::ServerStats; | ||
| use crate::schema::SchemaRef; | ||
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| #[derive(Clone, Debug)] | ||
| pub enum RawRowWithStats { | ||
| Row(RawRow), | ||
| Stats(ServerStats), | ||
| } | ||
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| #[derive(Clone, Debug, Default)] | ||
| pub struct RawRow { | ||
| pub schema: SchemaRef, | ||
| pub values: Vec<Option<String>>, | ||
| } | ||
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| impl RawRow { | ||
| pub fn new(schema: SchemaRef, values: Vec<Option<String>>) -> Self { | ||
| Self { schema, values } | ||
| } | ||
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| pub fn len(&self) -> usize { | ||
| self.values.len() | ||
| } | ||
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| pub fn is_empty(&self) -> bool { | ||
| self.values.is_empty() | ||
| } | ||
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| pub fn values(&self) -> &[Option<String>] { | ||
| &self.values | ||
| } | ||
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| pub fn schema(&self) -> SchemaRef { | ||
| self.schema.clone() | ||
| } | ||
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| pub fn from_vec(schema: SchemaRef, values: Vec<Option<String>>) -> Self { | ||
| Self { schema, values } | ||
| } | ||
| } | ||
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| impl From<(SchemaRef, Vec<Option<String>>)> for RawRow { | ||
| fn from(value: (SchemaRef, Vec<Option<String>>)) -> Self { | ||
| Self::new(value.0, value.1) | ||
| } | ||
| } | ||
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| impl IntoIterator for RawRow { | ||
| type Item = Option<String>; | ||
| type IntoIter = std::vec::IntoIter<Self::Item>; | ||
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| fn into_iter(self) -> Self::IntoIter { | ||
| self.values.into_iter() | ||
| } | ||
| } | ||
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| #[derive(Clone, Debug)] | ||
| pub struct RawRows { | ||
| rows: Vec<RawRow>, | ||
| } | ||
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| impl RawRows { | ||
| pub fn new(rows: Vec<RawRow>) -> Self { | ||
| Self { rows } | ||
| } | ||
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| pub fn rows(&self) -> &[RawRow] { | ||
| &self.rows | ||
| } | ||
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| pub fn len(&self) -> usize { | ||
| self.rows.len() | ||
| } | ||
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| pub fn is_empty(&self) -> bool { | ||
| self.rows.is_empty() | ||
| } | ||
| } | ||
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| impl IntoIterator for RawRows { | ||
| type Item = RawRow; | ||
| type IntoIter = std::vec::IntoIter<Self::Item>; | ||
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| fn into_iter(self) -> Self::IntoIter { | ||
| self.rows.into_iter() | ||
| } | ||
| } | ||
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| pub struct RawRowIterator { | ||
| schema: SchemaRef, | ||
| it: Pin<Box<dyn Stream<Item = Result<RawRow>> + Send>>, | ||
| } | ||
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| impl RawRowIterator { | ||
| pub fn new( | ||
| schema: SchemaRef, | ||
| it: Pin<Box<dyn Stream<Item = Result<RawRowWithStats>> + Send>>, | ||
| ) -> Self { | ||
| let it = it.filter_map(|r| match r { | ||
| Ok(RawRowWithStats::Row(r)) => Some(Ok(r)), | ||
| Ok(_) => None, | ||
| Err(err) => Some(Err(err)), | ||
| }); | ||
| Self { | ||
| schema, | ||
| it: Box::pin(it), | ||
| } | ||
| } | ||
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| pub fn schema(&self) -> SchemaRef { | ||
| self.schema.clone() | ||
| } | ||
| } | ||
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| impl Stream for RawRowIterator { | ||
| type Item = Result<RawRow>; | ||
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| fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> { | ||
| Pin::new(&mut self.it).poll_next(cx) | ||
| } | ||
| } |
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