llkv-runtime 0.8.5-alpha

Execution runtime for the LLKV toolkit.
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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155

use std::fmt;
use std::sync::Arc;

use arrow::datatypes::Schema;
use llkv_result::{Error, Result};
use llkv_storage::pager::Pager;
use simd_r_drive_entry_handle::EntryHandle;

use crate::{SelectExecution, TransactionKind};

#[derive(Clone)]
pub enum RuntimeStatementResult<P>
where
    P: Pager<Blob = EntryHandle> + Send + Sync,
{
    CreateTable {
        table_name: String,
    },
    CreateIndex {
        table_name: String,
        index_name: Option<String>,
    },
    NoOp,
    Insert {
        table_name: String,
        rows_inserted: usize,
    },
    Update {
        table_name: String,
        rows_updated: usize,
    },
    Delete {
        table_name: String,
        rows_deleted: usize,
    },
    Select {
        table_name: String,
        schema: Arc<Schema>,
        execution: Box<SelectExecution<P>>,
    },
    Transaction {
        kind: TransactionKind,
    },
}

impl<P> fmt::Debug for RuntimeStatementResult<P>
where
    P: Pager<Blob = EntryHandle> + Send + Sync,
{
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            RuntimeStatementResult::CreateTable { table_name } => f
                .debug_struct("CreateTable")
                .field("table_name", table_name)
                .finish(),
            RuntimeStatementResult::CreateIndex {
                table_name,
                index_name,
            } => f
                .debug_struct("CreateIndex")
                .field("table_name", table_name)
                .field("index_name", index_name)
                .finish(),
            RuntimeStatementResult::NoOp => f.debug_struct("NoOp").finish(),
            RuntimeStatementResult::Insert {
                table_name,
                rows_inserted,
            } => f
                .debug_struct("Insert")
                .field("table_name", table_name)
                .field("rows_inserted", rows_inserted)
                .finish(),
            RuntimeStatementResult::Update {
                table_name,
                rows_updated,
            } => f
                .debug_struct("Update")
                .field("table_name", table_name)
                .field("rows_updated", rows_updated)
                .finish(),
            RuntimeStatementResult::Delete {
                table_name,
                rows_deleted,
            } => f
                .debug_struct("Delete")
                .field("table_name", table_name)
                .field("rows_deleted", rows_deleted)
                .finish(),
            RuntimeStatementResult::Select {
                table_name, schema, ..
            } => f
                .debug_struct("Select")
                .field("table_name", table_name)
                .field("schema", schema)
                .finish(),
            RuntimeStatementResult::Transaction { kind } => {
                f.debug_struct("Transaction").field("kind", kind).finish()
            }
        }
    }
}

impl<P> RuntimeStatementResult<P>
where
    P: Pager<Blob = EntryHandle> + Send + Sync,
{
    /// Convert a StatementResult from one pager type to another.
    /// Only works for non-SELECT results (CreateTable, Insert, Update, Delete, NoOp, Transaction).
    #[allow(dead_code)]
    pub(crate) fn convert_pager_type<Q>(self) -> Result<RuntimeStatementResult<Q>>
    where
        Q: Pager<Blob = EntryHandle> + Send + Sync,
    {
        match self {
            RuntimeStatementResult::CreateTable { table_name } => {
                Ok(RuntimeStatementResult::CreateTable { table_name })
            }
            RuntimeStatementResult::CreateIndex {
                table_name,
                index_name,
            } => Ok(RuntimeStatementResult::CreateIndex {
                table_name,
                index_name,
            }),
            RuntimeStatementResult::NoOp => Ok(RuntimeStatementResult::NoOp),
            RuntimeStatementResult::Insert {
                table_name,
                rows_inserted,
            } => Ok(RuntimeStatementResult::Insert {
                table_name,
                rows_inserted,
            }),
            RuntimeStatementResult::Update {
                table_name,
                rows_updated,
            } => Ok(RuntimeStatementResult::Update {
                table_name,
                rows_updated,
            }),
            RuntimeStatementResult::Delete {
                table_name,
                rows_deleted,
            } => Ok(RuntimeStatementResult::Delete {
                table_name,
                rows_deleted,
            }),
            RuntimeStatementResult::Transaction { kind } => {
                Ok(RuntimeStatementResult::Transaction { kind })
            }
            RuntimeStatementResult::Select { .. } => Err(Error::Internal(
                "Cannot convert SELECT result between pager types in transaction".into(),
            )),
        }
    }
}