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use nom::IResult; use std::fmt; use std::str; use compound_select::{compound_selection, CompoundSelectStatement}; use create::{creation, view_creation, CreateTableStatement, CreateViewStatement}; use delete::{deletion, DeleteStatement}; use drop::{drop_table, DropTableStatement}; use insert::{insertion, InsertStatement}; use select::{selection, SelectStatement}; use set::{set, SetStatement}; use update::{updating, UpdateStatement}; #[derive(Clone, Debug, Eq, Hash, PartialEq, Serialize, Deserialize)] pub enum SqlQuery { CreateTable(CreateTableStatement), CreateView(CreateViewStatement), Insert(InsertStatement), CompoundSelect(CompoundSelectStatement), Select(SelectStatement), Delete(DeleteStatement), DropTable(DropTableStatement), Update(UpdateStatement), Set(SetStatement), } impl fmt::Display for SqlQuery { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { match *self { SqlQuery::Select(ref select) => write!(f, "{}", select), SqlQuery::Insert(ref insert) => write!(f, "{}", insert), SqlQuery::CreateTable(ref create) => write!(f, "{}", create), SqlQuery::CreateView(ref create) => write!(f, "{}", create), SqlQuery::Delete(ref delete) => write!(f, "{}", delete), SqlQuery::DropTable(ref drop) => write!(f, "{}", drop), SqlQuery::Update(ref update) => write!(f, "{}", update), SqlQuery::Set(ref set) => write!(f, "{}", set), _ => unimplemented!(), } } } named!(pub sql_query<&[u8], SqlQuery>, alt_complete!( do_parse!(c: creation >> (SqlQuery::CreateTable(c))) | do_parse!(i: insertion >> (SqlQuery::Insert(i))) | do_parse!(c: compound_selection >> (SqlQuery::CompoundSelect(c))) | do_parse!(s: selection >> (SqlQuery::Select(s))) | do_parse!(d: deletion >> (SqlQuery::Delete(d))) | do_parse!(dt: drop_table >> (SqlQuery::DropTable(dt))) | do_parse!(u: updating >> (SqlQuery::Update(u))) | do_parse!(s: set >> (SqlQuery::Set(s))) | do_parse!(c: view_creation >> (SqlQuery::CreateView(c))) ) ); pub fn parse_query(input: &str) -> Result<SqlQuery, &str> { let q_bytes = String::from(input.trim()).into_bytes(); match sql_query(&q_bytes) { IResult::Done(_, o) => Ok(o), IResult::Error(_) => Err("failed to parse query"), IResult::Incomplete(_) => unreachable!(), } } #[cfg(test)] mod tests { use super::*; use std::collections::hash_map::DefaultHasher; use std::hash::{Hash, Hasher}; use table::Table; #[test] fn hash_query() { let qstring = "INSERT INTO users VALUES (42, \"test\");"; let res = parse_query(qstring); assert!(res.is_ok()); let expected = SqlQuery::Insert(InsertStatement { table: Table::from("users"), fields: None, data: vec![vec![42.into(), "test".into()]], ..Default::default() }); let mut h0 = DefaultHasher::new(); let mut h1 = DefaultHasher::new(); res.unwrap().hash(&mut h0); expected.hash(&mut h1); assert_eq!(h0.finish(), h1.finish()); } #[test] fn trim_query() { let qstring = " INSERT INTO users VALUES (42, \"test\"); "; let res = parse_query(qstring); assert!(res.is_ok()); } #[test] fn display_select_query() { let qstring0 = "SELECT * FROM users"; let qstring1 = "SELECT * FROM users AS u"; let qstring2 = "SELECT name, password FROM users AS u"; let qstring3 = "SELECT name, password FROM users AS u WHERE user_id = '1'"; let qstring4 = "SELECT name, password FROM users AS u WHERE user = 'aaa' AND password = 'xxx'"; let qstring5 = "SELECT name * 2 AS double_name FROM users"; let res0 = parse_query(qstring0); let res1 = parse_query(qstring1); let res2 = parse_query(qstring2); let res3 = parse_query(qstring3); let res4 = parse_query(qstring4); let res5 = parse_query(qstring5); assert!(res0.is_ok()); assert!(res1.is_ok()); assert!(res2.is_ok()); assert!(res3.is_ok()); assert!(res4.is_ok()); assert!(res5.is_ok()); assert_eq!(qstring0, format!("{}", res0.unwrap())); assert_eq!(qstring1, format!("{}", res1.unwrap())); assert_eq!(qstring2, format!("{}", res2.unwrap())); assert_eq!(qstring3, format!("{}", res3.unwrap())); assert_eq!(qstring4, format!("{}", res4.unwrap())); assert_eq!(qstring5, format!("{}", res5.unwrap())); } #[test] fn format_select_query() { let qstring1 = "select * from users u"; let qstring2 = "select name,password from users u;"; let qstring3 = "select name,password from users u WHERE user_id='1'"; let expected1 = "SELECT * FROM users AS u"; let expected2 = "SELECT name, password FROM users AS u"; let expected3 = "SELECT name, password FROM users AS u WHERE user_id = '1'"; let res1 = parse_query(qstring1); let res2 = parse_query(qstring2); let res3 = parse_query(qstring3); assert!(res1.is_ok()); assert!(res2.is_ok()); assert!(res3.is_ok()); assert_eq!(expected1, format!("{}", res1.unwrap())); assert_eq!(expected2, format!("{}", res2.unwrap())); assert_eq!(expected3, format!("{}", res3.unwrap())); } #[test] fn format_select_query_with_where_clause() { let qstring0 = "select name, password from users as u where user='aaa' and password= 'xxx'"; let qstring1 = "select name, password from users as u where user=? and password =?"; let expected0 = "SELECT name, password FROM users AS u WHERE user = 'aaa' AND password = 'xxx'"; let expected1 = "SELECT name, password FROM users AS u WHERE user = ? AND password = ?"; let res0 = parse_query(qstring0); let res1 = parse_query(qstring1); assert!(res0.is_ok()); assert!(res1.is_ok()); assert_eq!(expected0, format!("{}", res0.unwrap())); assert_eq!(expected1, format!("{}", res1.unwrap())); } #[test] fn format_select_query_with_function() { let qstring1 = "select count(*) from users"; let expected1 = "SELECT count(*) FROM users"; let res1 = parse_query(qstring1); assert!(res1.is_ok()); assert_eq!(expected1, format!("{}", res1.unwrap())); } #[test] fn display_insert_query() { let qstring = "INSERT INTO users (name, password) VALUES ('aaa', 'xxx')"; let res = parse_query(qstring); assert!(res.is_ok()); assert_eq!(qstring, format!("{}", res.unwrap())); } #[test] fn display_insert_query_no_columns() { let qstring = "INSERT INTO users VALUES ('aaa', 'xxx')"; let expected = "INSERT INTO users VALUES ('aaa', 'xxx')"; let res = parse_query(qstring); assert!(res.is_ok()); assert_eq!(expected, format!("{}", res.unwrap())); } #[test] fn format_insert_query() { let qstring = "insert into users (name, password) values ('aaa', 'xxx')"; let expected = "INSERT INTO users (name, password) VALUES ('aaa', 'xxx')"; let res = parse_query(qstring); assert!(res.is_ok()); assert_eq!(expected, format!("{}", res.unwrap())); } #[test] fn format_update_query() { let qstring = "update users set name=42, password='xxx' where id=1"; let expected = "UPDATE users SET name = 42, password = 'xxx' WHERE id = 1"; let res = parse_query(qstring); assert!(res.is_ok()); assert_eq!(expected, format!("{}", res.unwrap())); } #[test] fn format_delete_query_with_where_clause() { let qstring0 = "delete from users where user='aaa' and password= 'xxx'"; let qstring1 = "delete from users where user=? and password =?"; let expected0 = "DELETE FROM users WHERE user = 'aaa' AND password = 'xxx'"; let expected1 = "DELETE FROM users WHERE user = ? AND password = ?"; let res0 = parse_query(qstring0); let res1 = parse_query(qstring1); assert!(res0.is_ok()); assert!(res1.is_ok()); assert_eq!(expected0, format!("{}", res0.unwrap())); assert_eq!(expected1, format!("{}", res1.unwrap())); } #[test] fn format_query_with_escaped_keyword() { let qstring0 = "delete from articles where `key`='aaa'"; let qstring1 = "delete from `where` where user=?"; let expected0 = "DELETE FROM articles WHERE `key` = 'aaa'"; let expected1 = "DELETE FROM `where` WHERE user = ?"; let res0 = parse_query(qstring0); let res1 = parse_query(qstring1); assert!(res0.is_ok()); assert!(res1.is_ok()); assert_eq!(expected0, format!("{}", res0.unwrap())); assert_eq!(expected1, format!("{}", res1.unwrap())); } }