risinglight 0.2.0

An OLAP database system for educational purpose
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79

// Copyright 2022 RisingLight Project Authors. Licensed under Apache-2.0.

use std::fmt;

use itertools::Itertools;
use serde::Serialize;

use super::*;
use crate::catalog::{ColumnId, TableRefId};
use crate::types::DataTypeKind;

/// The logical plan of `INSERT`.
#[derive(Debug, Clone, Serialize)]
pub struct LogicalInsert {
    table_ref_id: TableRefId,
    column_ids: Vec<ColumnId>,
    child: PlanRef,
}

impl LogicalInsert {
    pub fn new(table_ref_id: TableRefId, column_ids: Vec<ColumnId>, child: PlanRef) -> Self {
        Self {
            table_ref_id,
            column_ids,
            child,
        }
    }

    /// Get a reference to the logical insert's table ref id.
    pub fn table_ref_id(&self) -> TableRefId {
        self.table_ref_id
    }

    /// Get a reference to the logical insert's column ids.
    pub fn column_ids(&self) -> &[u32] {
        self.column_ids.as_ref()
    }
}
impl PlanTreeNodeUnary for LogicalInsert {
    fn child(&self) -> PlanRef {
        self.child.clone()
    }
    #[must_use]
    fn clone_with_child(&self, child: PlanRef) -> Self {
        Self::new(self.table_ref_id(), self.column_ids().to_vec(), child)
    }
}
impl_plan_tree_node_for_unary!(LogicalInsert);

impl PlanNode for LogicalInsert {
    fn schema(&self) -> Vec<ColumnDesc> {
        vec![ColumnDesc::new(
            DataType::new(DataTypeKind::Int32, false),
            "$insert.row_counts".to_string(),
            false,
        )]
    }

    fn prune_col(&self, _required_cols: BitSet) -> PlanRef {
        let input_cols = self
            .column_ids
            .iter()
            .map(|&column_id| column_id as usize)
            .collect();
        self.clone_with_child(self.child.prune_col(input_cols))
            .into_plan_ref()
    }
}

impl fmt::Display for LogicalInsert {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        writeln!(
            f,
            "LogicalInsert: table {}, columns [{}]",
            self.table_ref_id.table_id,
            self.column_ids.iter().map(ToString::to_string).join(", ")
        )
    }
}