gluesql_core/store/
index.rs

1use {
2    super::RowIter,
3    crate::{
4        ast::{IndexOperator, OrderByExpr},
5        data::Value,
6        result::{Error, Result},
7    },
8    serde::Serialize,
9    std::fmt::Debug,
10    thiserror::Error as ThisError,
11};
12
13#[derive(ThisError, Serialize, Debug, PartialEq, Eq)]
14pub enum IndexError {
15    #[error("table not found: {0}")]
16    TableNotFound(String),
17
18    #[error("index name already exists: {0}")]
19    IndexNameAlreadyExists(String),
20
21    #[error("index name does not exist: {0}")]
22    IndexNameDoesNotExist(String),
23
24    #[error("conflict - table not found: {0}")]
25    ConflictTableNotFound(String),
26
27    #[error("conflict - update failed - index value")]
28    ConflictOnEmptyIndexValueUpdate,
29
30    #[error("conflict - delete failed - index value")]
31    ConflictOnEmptyIndexValueDelete,
32
33    #[error("conflict - scan failed - index value")]
34    ConflictOnEmptyIndexValueScan,
35
36    #[error("conflict - index sync - delete index data")]
37    ConflictOnIndexDataDeleteSync,
38}
39
40pub trait Index {
41    fn scan_indexed_data<'a>(
42        &'a self,
43        _table_name: &str,
44        _index_name: &str,
45        _asc: Option<bool>,
46        _cmp_value: Option<(&IndexOperator, Value)>,
47    ) -> Result<RowIter<'a>> {
48        Err(Error::StorageMsg(
49            "[Storage] Index::scan_indexed_data is not supported".to_owned(),
50        ))
51    }
52}
53
54pub trait IndexMut {
55    fn create_index(
56        &mut self,
57        _table_name: &str,
58        _index_name: &str,
59        _column: &OrderByExpr,
60    ) -> Result<()> {
61        let msg = "[Storage] Index::create_index is not supported".to_owned();
62
63        Err(Error::StorageMsg(msg))
64    }
65
66    fn drop_index(&mut self, _table_name: &str, _index_name: &str) -> Result<()> {
67        let msg = "[Storage] Index::drop_index is not supported".to_owned();
68
69        Err(Error::StorageMsg(msg))
70    }
71}
gluesql_core/store/index.rs

gluesql_core/store/
index.rs
