Finish parser impl

Author: gotorion

Cargo.lock

@@ -6,4 +6,5 @@ authors = ["John <[email protected]>"]
 descriptions = "A tiny sql server"
 readme = "README.md"
 repository = "https://github.com/gotorion/db1969"
-[dependencies]
+[dependencies]
+serde = { version = "1.0",features = ["derive"] }

Cargo.toml

@@ -6,3 +6,15 @@ pub enum Error {
     Internal(String),
     WriteConflict,
 }
+
+impl From<std::num::ParseIntError> for Error {
+    fn from(value: std::num::ParseIntError) -> Self {
+        Error::Parse(value.to_string())
+    }
+}
+
+impl From<std::num::ParseFloatError> for Error {
+    fn from(value: std::num::ParseFloatError) -> Self {
+        Error::Parse(value.to_string())
+    }
+}

src/error.rs

@@ -1 +1,2 @@
-mod parser;
+mod parser;
+mod types;

src/sql/mod.rs

@@ -0,0 +1,45 @@
+use crate::sql::types::*;
+
+#[derive(Debug, PartialEq)]
+pub enum Statement {
+    CreateTable {
+        name: String,
+        columns: Vec<Column>,
+    },
+    Insert {
+        table_name: String,
+        columns: Option<Vec<String>>,
+        values: Vec<Vec<Expression>>,
+    },
+    Select {
+        table_name: String,
+    },
+}
+
+#[derive(Debug, PartialEq)]
+pub struct Column {
+    pub name: String,
+    pub data_type: DataType,
+    pub nullable: Option<bool>,
+    pub default: Option<Expression>,
+}
+
+#[derive(Debug, PartialEq)]
+pub enum Expression {
+    Consts(Consts),
+}
+
+impl From<Consts> for Expression {
+    fn from(consts: Consts) -> Self {
+        Self::Consts(consts)
+    }
+}
+
+#[derive(Debug, PartialEq)]
+pub enum Consts {
+    Null,
+    Boolean(bool),
+    Integer(i64),
+    Float(f64),
+    String(String),
+}