cdbc_mysql/
type_info.rs

1use std::fmt::{self, Display, Formatter};
2
3use crate::protocol::text::{ColumnDefinition, ColumnFlags, ColumnType};
4use cdbc::type_info::TypeInfo;
5
6/// Type information for a MySql type.
7#[derive(Debug, Clone)]
8#[derive(serde::Serialize, serde::Deserialize)]
9pub struct MySqlTypeInfo {
10    pub(crate) r#type: ColumnType,
11    pub(crate) flags: ColumnFlags,
12    pub(crate) char_set: u16,
13
14    // [max_size] for integer types, this is (M) in BIT(M) or TINYINT(M)
15    #[serde(default)]
16    pub(crate) max_size: Option<u32>,
17}
18
19impl MySqlTypeInfo {
20    pub(crate) const fn binary(ty: ColumnType) -> Self {
21        Self {
22            r#type: ty,
23            flags: ColumnFlags::BINARY,
24            char_set: 63,
25            max_size: None,
26        }
27    }
28
29    #[doc(hidden)]
30    pub const fn __enum() -> Self {
31        Self {
32            r#type: ColumnType::Enum,
33            flags: ColumnFlags::BINARY,
34            char_set: 63,
35            max_size: None,
36        }
37    }
38
39    #[doc(hidden)]
40    pub fn __type_feature_gate(&self) -> Option<&'static str> {
41        match self.r#type {
42            ColumnType::Date | ColumnType::Time | ColumnType::Timestamp | ColumnType::Datetime => {
43                Some("time")
44            }
45
46            ColumnType::Json => Some("json"),
47            ColumnType::NewDecimal => Some("bigdecimal"),
48
49            _ => None,
50        }
51    }
52
53    pub(crate) fn from_column(column: &ColumnDefinition) -> Self {
54        Self {
55            r#type: column.r#type,
56            flags: column.flags,
57            char_set: column.char_set,
58            max_size: Some(column.max_size),
59        }
60    }
61}
62
63impl Display for MySqlTypeInfo {
64    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
65        f.pad(self.name())
66    }
67}
68
69impl TypeInfo for MySqlTypeInfo {
70    fn is_null(&self) -> bool {
71        matches!(self.r#type, ColumnType::Null)
72    }
73
74    fn name(&self) -> &str {
75        self.r#type.name(self.char_set, self.flags, self.max_size)
76    }
77}
78
79impl PartialEq<MySqlTypeInfo> for MySqlTypeInfo {
80    fn eq(&self, other: &MySqlTypeInfo) -> bool {
81        if self.r#type != other.r#type {
82            return false;
83        }
84
85        match self.r#type {
86            ColumnType::Tiny
87            | ColumnType::Short
88            | ColumnType::Long
89            | ColumnType::Int24
90            | ColumnType::LongLong => {
91                return self.flags.contains(ColumnFlags::UNSIGNED)
92                    == other.flags.contains(ColumnFlags::UNSIGNED);
93            }
94
95            // for string types, check that our charset matches
96            ColumnType::VarChar
97            | ColumnType::Blob
98            | ColumnType::TinyBlob
99            | ColumnType::MediumBlob
100            | ColumnType::LongBlob
101            | ColumnType::String
102            | ColumnType::VarString
103            | ColumnType::Enum => {
104                return self.char_set == other.char_set;
105            }
106
107            _ => {}
108        }
109
110        true
111    }
112}
113
114impl Eq for MySqlTypeInfo {}
cdbc_mysql/type_info.rs

cdbc_mysql/
type_info.rs
