simple_db_rust/
field.rs

1use std::fmt::Debug;
2
3use crate::Predicate;
4
5#[derive(Copy, Clone, PartialEq, Debug)]
6pub enum Type {
7    INT,
8}
9
10pub fn get_type_length(t: Type) -> usize {
11    match t {
12        Type::INT => 4,
13    }
14}
15
16#[derive(PartialEq, Debug, Clone)]
17pub struct FieldItem {
18    pub field_type: Type,
19    pub field_name: String,
20}
21
22#[derive(Copy, Clone, PartialEq, Eq, Ord, Debug, PartialOrd)]
23pub struct IntField {
24    pub value: i32,
25}
26
27impl IntField {
28    pub fn new(v: i32) -> IntField {
29        IntField { value: v }
30    }
31
32    pub fn len(&self) -> usize {
33        4
34    }
35
36    pub fn satisfy(&self, predicate: &Predicate) -> bool {
37        match predicate.op {
38            crate::Op::Equals => self.value == predicate.field.value,
39            crate::Op::GreaterThan => self.value > predicate.field.value,
40            crate::Op::LessThan => self.value < predicate.field.value,
41            crate::Op::LessThanOrEq => self.value <= predicate.field.value,
42            crate::Op::GreaterThanOrEq => self.value >= predicate.field.value,
43            crate::Op::Like => todo!(),
44            crate::Op::NotEquals => self.value != predicate.field.value,
45        }
46    }
47}
simple_db_rust/field.rs

simple_db_rust/
field.rs
