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// Copyright (c) 2020 rust-mysql-simple contributors // // Licensed under the Apache License, Version 2.0 // <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> or the MIT // license <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. All files in the project carrying such notice may not be copied, // modified, or distributed except according to those terms. //! This create offers: //! //! * MySql database driver in pure rust; //! * connection pool. //! //! Features: //! //! * macOS, Windows and Linux support; //! * TLS support via **nativetls** create; //! * MySql text protocol support, i.e. support of simple text queries and text result sets; //! * MySql binary protocol support, i.e. support of prepared statements and binary result sets; //! * support of multi-result sets; //! * support of named parameters for prepared statements; //! * optional per-connection cache of prepared statements; //! * support of MySql packets larger than 2^24; //! * support of Unix sockets and Windows named pipes; //! * support of custom LOCAL INFILE handlers; //! * support of MySql protocol compression; //! * support of auth plugins: //! * **mysql_native_password** - for MySql prior to v8; //! * **caching_sha2_password** - for MySql v8 and higher. //! //! ## Installation //! //! Put the desired version of the crate into the `dependencies` section of your `Cargo.toml`: //! //! ```toml //! [dependencies] //! mysql = "*" //! ``` //! //! ## Example //! //! ```rust //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! #[derive(Debug, PartialEq, Eq)] //! struct Payment { //! customer_id: i32, //! amount: i32, //! account_name: Option<String>, //! } //! //! let url = "mysql://root:password@localhost:3307/db_name"; //! # let url = get_opts(); //! //! let pool = Pool::new(url)?; //! //! let mut conn = pool.get_conn()?; //! //! // Let's create a table for payments. //! conn.query_drop( //! r"CREATE TEMPORARY TABLE payment ( //! customer_id int not null, //! amount int not null, //! account_name text //! )")?; //! //! let payments = vec![ //! Payment { customer_id: 1, amount: 2, account_name: None }, //! Payment { customer_id: 3, amount: 4, account_name: Some("foo".into()) }, //! Payment { customer_id: 5, amount: 6, account_name: None }, //! Payment { customer_id: 7, amount: 8, account_name: None }, //! Payment { customer_id: 9, amount: 10, account_name: Some("bar".into()) }, //! ]; //! //! // Now let's insert payments to the database //! conn.exec_batch( //! r"INSERT INTO payment (customer_id, amount, account_name) //! VALUES (:customer_id, :amount, :account_name)", //! payments.iter().map(|p| params! { //! "customer_id" => p.customer_id, //! "amount" => p.amount, //! "account_name" => &p.account_name, //! }) //! )?; //! //! // Let's select payments from database. Type inference should do the trick here. //! let selected_payments = conn //! .query_map( //! "SELECT customer_id, amount, account_name from payment", //! |(customer_id, amount, account_name)| { //! Payment { customer_id, amount, account_name } //! }, //! )?; //! //! // Let's make sure, that `payments` equals to `selected_payments`. //! // Mysql gives no guaranties on order of returned rows //! // without `ORDER BY`, so assume we are lucky. //! assert_eq!(payments, selected_payments); //! println!("Yay!"); //! # }); //! ``` //! //! ## API Documentation //! //! Please refer to the [crate docs]. //! //! ## Basic structures //! //! ### `Opts` //! //! This structure holds server host name, client username/password and other settings, //! that controls client behavior. //! //! #### URL-based connection string //! //! Note, that you can use URL-based connection string as a source of an `Opts` instance. //! URL schema must be `mysql`. Host, port and credentials, as well as query parameters, //! should be given in accordance with the RFC 3986. //! //! Examples: //! //! ```rust //! # mysql::doctest_wrapper!(__result, { //! # use mysql::Opts; //! let _ = Opts::from_url("mysql://localhost/some_db")?; //! let _ = Opts::from_url("mysql://[::1]/some_db")?; //! let _ = Opts::from_url("mysql://user:pass%20word@127.0.0.1:3307/some_db?")?; //! # }); //! ``` //! //! Supported URL parameters (for the meaning of each field please refer to the docs on `Opts` //! structure in the create API docs): //! //! * `prefer_socket: true | false` - defines the value of the same field in the `Opts` structure; //! * `tcp_keepalive_time_ms: u32` - defines the value (in milliseconds) //! of the `tcp_keepalive_time` field in the `Opts` structure; //! * `tcp_connect_timeout_ms: u64` - defines the value (in milliseconds) //! of the `tcp_connect_timeout` field in the `Opts` structure; //! * `stmt_cache_size: u32` - defines the value of the same field in the `Opts` structure; //! * `compress` - defines the value of the same field in the `Opts` structure. //! Supported value are: //! * `true` - enables compression with the default compression level; //! * `fast` - enables compression with "fast" compression level; //! * `best` - enables compression with "best" compression level; //! * `1`..`9` - enables compression with the given compression level. //! * `socket` - socket path on UNIX, or pipe name on Windows. //! //! ### `OptsBuilder` //! //! It's a convenient builder for the `Opts` structure. It defines setters for fields //! of the `Opts` structure. //! //! ```no_run //! # mysql::doctest_wrapper!(__result, { //! # use mysql::*; //! let opts = OptsBuilder::new() //! .user(Some("foo")) //! .db_name(Some("bar")); //! let _ = Conn::new(opts)?; //! # }); //! ``` //! //! ### `Conn` //! //! This structure represents an active MySql connection. It also holds statement cache //! and metadata for the last result set. //! //! ### `Transaction` //! //! It's a simple wrapper on top of a routine, that starts with `START TRANSACTION` //! and ends with `COMMIT` or `ROLBACK`. //! //! ``` //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! let pool = Pool::new(get_opts())?; //! let mut conn = pool.get_conn()?; //! //! let mut tx = conn.start_transaction(TxOpts::default())?; //! tx.query_drop("CREATE TEMPORARY TABLE tmp (TEXT a)")?; //! tx.exec_drop("INSERT INTO tmp (a) VALUES (?)", ("foo",))?; //! let val: Option<String> = tx.query_first("SELECT a from tmp")?; //! assert_eq!(val.unwrap(), "foo"); //! // Note, that transaction will be rolled back implicitly on Drop, if not committed. //! tx.rollback(); //! //! let val: Option<String> = conn.query_first("SELECT a from tmp")?; //! assert_eq!(val, None); //! # }); //! ``` //! //! ### `Pool` //! //! It's a reference to a connection pool, that can be cloned and shared between threads. //! //! ``` //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! use std::thread::spawn; //! //! let pool = Pool::new(get_opts())?; //! //! let handles = (0..4).map(|i| { //! spawn({ //! let pool = pool.clone(); //! move || { //! let mut conn = pool.get_conn()?; //! conn.exec_first::<u32, _, _>("SELECT ? * 10", (i,)) //! .map(Option::unwrap) //! } //! }) //! }); //! //! let result: Result<Vec<u32>> = handles.map(|handle| handle.join().unwrap()).collect(); //! //! assert_eq!(result.unwrap(), vec![0, 10, 20, 30]); //! # }); //! ``` //! //! ### `Statement` //! //! Statement, actually, is just an identifier coupled with statement metadata, i.e an information //! about its parameters and columns. Internally the `Statement` structure also holds additional //! data required to support named parameters (see bellow). //! //! ``` //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! let pool = Pool::new(get_opts())?; //! let mut conn = pool.get_conn()?; //! //! let stmt = conn.prep("DO ?")?; //! //! // The prepared statement will return no columns. //! assert!(stmt.columns().is_empty()); //! //! // The prepared statement have one parameter. //! let param = stmt.params().get(0).unwrap(); //! assert_eq!(param.schema_str(), ""); //! assert_eq!(param.table_str(), ""); //! assert_eq!(param.name_str(), "?"); //! # }); //! ``` //! //! ### `Value` //! //! This enumeration represents the raw value of a MySql cell. Library offers conversion between //! `Value` and different rust types via `FromValue` trait described below. //! //! #### `FromValue` trait //! //! This trait is reexported from **mysql_common** create. Please refer to its //! [crate docs][mysql_common docs] for the list of supported conversions. //! //! Trait offers conversion in two flavours: //! //! * `from_value(Value) -> T` - convenient, but panicking conversion. //! //! Note, that for any variant of `Value` there exist a type, that fully covers its domain, //! i.e. for any variant of `Value` there exist `T: FromValue` such that `from_value` will never //! panic. This means, that if your database schema is known, than it's possible to write your //! application using only `from_value` with no fear of runtime panic. //! //! * `from_value_opt(Value) -> Option<T>` - non-panicking, but less convenient conversion. //! //! This function is useful to probe conversion in cases, where source database schema //! is unknown. //! //! ``` //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! let via_test_protocol: u32 = from_value(Value::Bytes(b"65536".to_vec())); //! let via_bin_protocol: u32 = from_value(Value::UInt(65536)); //! assert_eq!(via_test_protocol, via_bin_protocol); //! //! let unknown_val = // ... //! # Value::Time(false, 10, 2, 30, 0, 0); //! //! // Maybe it is a float? //! let unknown_val = match from_value_opt::<f64>(unknown_val) { //! Ok(float) => { //! println!("A float value: {}", float); //! return Ok(()); //! } //! Err(FromValueError(unknown_val)) => unknown_val, //! }; //! //! // Or a string? //! let unknown_val = match from_value_opt::<String>(unknown_val) { //! Ok(string) => { //! println!("A string value: {}", string); //! return Ok(()); //! } //! Err(FromValueError(unknown_val)) => unknown_val, //! }; //! //! // Screw this, I'll simply match on it //! match unknown_val { //! val @ Value::NULL => { //! println!("An empty value: {:?}", from_value::<Option<u8>>(val)) //! }, //! val @ Value::Bytes(..) => { //! // It's non-utf8 bytes, since we already tried to convert it to String //! println!("Bytes: {:?}", from_value::<Vec<u8>>(val)) //! } //! val @ Value::Int(..) => { //! println!("A signed integer: {}", from_value::<i64>(val)) //! } //! val @ Value::UInt(..) => { //! println!("An unsigned integer: {}", from_value::<u64>(val)) //! } //! Value::Float(..) => unreachable!("already tried"), //! val @ Value::Date(..) => { //! use mysql::chrono::NaiveDateTime; //! println!("A date value: {}", from_value::<NaiveDateTime>(val)) //! } //! val @ Value::Time(..) => { //! use std::time::Duration; //! println!("A time value: {:?}", from_value::<Duration>(val)) //! } //! } //! # }); //! ``` //! //! ### `Row` //! //! Internally `Row` is a vector of `Value`s, that also allows indexing by a column name/offset, //! and stores row metadata. Library offers conversion between `Row` and sequences of Rust types //! via `FromRow` trait described below. //! //! #### `FromRow` trait //! //! This trait is reexported from **mysql_common** create. Please refer to its //! [crate docs][mysql_common docs] for the list of supported conversions. //! //! This conversion is based on the `FromValue` and so comes in two similar flavours: //! //! * `from_row(Row) -> T` - same as `from_value`, but for rows; //! * `from_row_opt(Row) -> Option<T>` - same as `from_value_opt`, but for rows. //! //! [`Queryable`][#queryable] trait offers implicit conversion for rows of a query result, //! that is based on this trait. //! //! ``` //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! let mut conn = Conn::new(get_opts())?; //! //! // Single-column row can be converted to a singular value //! let val: Option<String> = conn.query_first("SELECT 'foo'")?; //! assert_eq!(val.unwrap(), "foo"); //! //! // Example of a mutli-column row conversion to an inferred type. //! let row = conn.query_first("SELECT 255, 256")?; //! assert_eq!(row, Some((255u8, 256u16))); //! //! // Some unknown row //! let row: Row = conn.query_first( //! // ... //! # "SELECT 255, Null", //! )?.unwrap(); //! //! for column in row.columns_ref() { //! // Cells in a row can be indexed by numeric index or by column name //! let column_value = &row[column.name_str().as_ref()]; //! //! println!( //! "Column {} of type {:?} with value {:?}", //! column.name_str(), //! column.column_type(), //! column_value, //! ); //! } //! # }); //! ``` //! //! ### `Params` //! //! Represents parameters of a prepared statement, but this type won't appear directly in your code //! because binary protocol API will ask for `T: Into<Params>`, where `Into<Params>` is implemented: //! //! * for tuples of `Into<Value>` types up to arity 12; //! //! **Note:** singular tuple requires extra comma, e.g. `("foo",)`; //! //! * for `IntoIterator<Item: Into<Value>>` for cases, when your statement takes more //! than 12 parameters; //! * for named parameters representation (the value of the `params!` macro, described below). //! //! ``` //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! let mut conn = Conn::new(get_opts())?; //! //! // Singular tuple requires extra comma: //! let row: Option<u8> = conn.exec_first("SELECT ?", (0,))?; //! assert_eq!(row.unwrap(), 0); //! //! // More than 12 parameters: //! let row: Option<u8> = conn.exec_first( //! "SELECT ? + ? + ? + ? + ? + ? + ? + ? + ? + ? + ? + ? + ? + ? + ? + ?", //! (0..16).collect::<Vec<_>>(), //! )?; //! assert_eq!(row.unwrap(), 120); //! # }); //! ``` //! //! **Note:** Please refer to the [**mysql_common** crate docs][mysql_common docs] for the list //! of types, that implements `Into<Value>`. //! //! #### `Serialized`, `Deserialized` //! //! Wrapper structures for cases, when you need to provide a value for a JSON cell, //! or when you need to parse JSON cell as a struct. //! //! ```rust //! # #[macro_use] extern crate serde_derive; //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! /// Serializable structure. //! #[derive(Debug, PartialEq, Serialize, Deserialize)] //! struct Example { //! foo: u32, //! } //! //! // Value::from for Serialized will emit json string. //! let value = Value::from(Serialized(Example { foo: 42 })); //! assert_eq!(value, Value::Bytes(br#"{"foo":42}"#.to_vec())); //! //! // from_value for Deserialized will parse json string. //! let structure: Deserialized<Example> = from_value(value); //! assert_eq!(structure, Deserialized(Example { foo: 42 })); //! # }); //! ``` //! //! ### `QueryResult` //! //! It's an iterator over rows of a query result with support of multi-result sets. It's intended //! for cases when you need full control during result set iteration. For other cases //! [`Queryalbe`](#queryable) provides a set of methods that will immediately consume //! the first result set and drop everything else. //! //! This iterator is lazy so it won't read the result from server until you iterate over it. //! MySql protocol is strictly sequential, so `Conn` will be mutably borrowed until the result //! is fully consumed. //! //! ```rust //! # #[macro_use] extern crate serde_derive; //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! let mut conn = Conn::new(get_opts())?; //! //! // This query will emit two result sets. //! let mut result = conn.query_iter("SELECT 1, 2; SELECT 3, 3.14;")?; //! //! let mut sets = 0; //! while let Some(result_set) = result.next_set() { //! let result_set = result_set?; //! sets += 1; //! //! println!("Result set columns: {:?}", result_set.columns()); //! println!( //! "Result set meta: {}, {:?}, {} {}", //! result_set.affected_rows(), //! result_set.last_insert_id(), //! result_set.warnings(), //! result_set.info_str(), //! ); //! //! for row in result_set { //! match sets { //! 1 => { //! // First result set will contain two numbers. //! assert_eq!((1_u8, 2_u8), from_row(row?)); //! } //! 2 => { //! // Second result set will contain a number and a float. //! assert_eq!((3_u8, 3.14), from_row(row?)); //! } //! _ => unreachable!(), //! } //! } //! } //! //! assert_eq!(sets, 2); //! # }); //! ``` //! //! ## Text protocol //! //! MySql text protocol is implemented in the set of `Queryable::query*` methods. It's useful when your //! query doesn't have parameters. //! //! **Note:** All values of a text protocol result set will be encoded as strings by the server, //! so `from_value` conversion may lead to additional parsing costs. //! //! Examples: //! //! ```rust //! # mysql::doctest_wrapper!(__result, { //! # use mysql::*; //! # use mysql::prelude::*; //! let pool = Pool::new(get_opts())?; //! let val = pool.get_conn()?.query_first("SELECT POW(2, 16)")?; //! //! // Text protocol returns bytes even though the result of POW //! // is actually a floating point number. //! assert_eq!(val, Some(Value::Bytes("65536".as_bytes().to_vec()))); //! # }); //! ``` //! //! ### The `TextQuery` trait. //! //! The `TextQuery` trait covers the set of `Queryable::query*` methods from the perspective //! of a query, i.e. `TextQuery` is something, that can be performed if suitable connection //! is given. Suitable connections are: //! //! * `&Pool` //! * `Conn` //! * `PooledConn` //! * `&mut Conn` //! * `&mut PooledConn` //! * `&mut Transaction` //! //! The unique characteristic of this trait, is that you can give away the connection //! and thus produce `QueryResult` that satisfies `'static`: //! //! ```rust //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! fn iter(pool: &Pool) -> Result<impl Iterator<Item=Result<u32>>> { //! let result = "SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3".run(pool)?; //! Ok(result.map(|row| row.map(from_row))) //! } //! //! let pool = Pool::new(get_opts())?; //! //! let it = iter(&pool)?; //! //! assert_eq!(it.collect::<Result<Vec<u32>>>()?, vec![1, 2, 3]); //! # }); //! ``` //! //! ## Binary protocol and prepared statements. //! //! MySql binary protocol is implemented in `prep`, `close` and the set of `exec*` methods, //! defined on the [`Queryable`](#queryable) trait. Prepared statements is the only way to //! pass rust value to the MySql server. MySql uses `?` symbol as a parameter placeholder //! and it's only possible to use parameters where a single MySql value is expected. //! For example: //! //! ```rust //! # mysql::doctest_wrapper!(__result, { //! # use mysql::*; //! # use mysql::prelude::*; //! let pool = Pool::new(get_opts())?; //! let val = pool.get_conn()?.exec_first("SELECT POW(?, ?)", (2, 16))?; //! //! assert_eq!(val, Some(Value::Float(65536.0))); //! # }); //! ``` //! //! ### Statements //! //! In MySql each prepared statement belongs to a particular connection and can't be executed //! on another connection. Trying to do so will lead to an error. The driver won't tie statement //! to its connection in any way, but one can look on to the connection id, containe //! in the `Statement` structure. //! //! ```rust //! # mysql::doctest_wrapper!(__result, { //! # use mysql::*; //! # use mysql::prelude::*; //! let pool = Pool::new(get_opts())?; //! //! let mut conn_1 = pool.get_conn()?; //! let mut conn_2 = pool.get_conn()?; //! //! let stmt_1 = conn_1.prep("SELECT ?")?; //! //! // stmt_1 is for the conn_1, .. //! assert!(stmt_1.connection_id() == conn_1.connection_id()); //! assert!(stmt_1.connection_id() != conn_2.connection_id()); //! //! // .. so stmt_1 will execute only on conn_1 //! assert!(conn_1.exec_drop(&stmt_1, ("foo",)).is_ok()); //! assert!(conn_2.exec_drop(&stmt_1, ("foo",)).is_err()); //! # }); //! ``` //! //! ### Statement cache //! //! `Conn` will manage the cache of prepared statements on the client side, so subsequent calls //! to prepare with the same statement won't lead to a client-server roundtrip. Cache size //! for each connection is determined by the `stmt_cache_size` field of the `Opts` structure. //! Statements, that are out of this boundary will be closed in LRU order. //! //! Statement cache is completely disabled if `stmt_cache_size` is zero. //! //! **Caveats:** //! //! * disabled statement cache means, that you have to close statements yourself using //! `Conn::close`, or they'll exhaust server limits/resources; //! //! * you should be aware of the [`max_prepared_stmt_count`][max_prepared_stmt_count] //! option of the MySql server. If the number of active connections times the value //! of `stmt_cache_size` is greater, than you could receive an error while prepareing //! another statement. //! //! ### Named parameters //! //! MySql itself doesn't have named parameters support, so it's implemented on the client side. //! One should use `:name` as a placeholder syntax for a named parameter. //! //! Named parameters may be repeated within the statement, e.g `SELECT :foo, :foo` will require //! a single named parameter `foo` that will be repeated on the corresponding positions during //! statement execution. //! //! One should use the `params!` macro to build a parameters for execution. //! //! **Note:** Positional and named parameters can't be mixed within the single statement. //! //! Examples: //! //! ```rust //! # mysql::doctest_wrapper!(__result, { //! # use mysql::*; //! # use mysql::prelude::*; //! let pool = Pool::new(get_opts())?; //! //! let mut conn = pool.get_conn()?; //! let stmt = conn.prep("SELECT :foo, :bar, :foo")?; //! //! let foo = 42; //! //! let val_13 = conn.exec_first(&stmt, params! { "foo" => 13, "bar" => foo })?.unwrap(); //! // Short syntax is available when param name is the same as variable name: //! let val_42 = conn.exec_first(&stmt, params! { foo, "bar" => 13 })?.unwrap(); //! //! assert_eq!((foo, 13, foo), val_42); //! assert_eq!((13, foo, 13), val_13); //! # }); //! ``` //! //! ### `BinQuery` and `BatchQuery` traits. //! //! `BinQuery` and `BatchQuery` traits covers the set of `Queryable::exec*` methods from //! the perspective of a query, i.e. `BinQuery` is something, that can be performed if suitable //! connection is given (see [`TextQuery`](#the-textquery-trat) section for the list //! of suitable connections). //! //! As with the [`TextQuery`](#the-textquery-trait) you can give away the connection and acquire //! `QueryResult` that satisfies `'static`. //! //! `BinQuery` is for prepared statements, and prepared statements requires a set of parameters, //! so `BinQuery` is implemented for `QueryWithParams` structure, that can be acquired, using //! `WithParams` trait. //! //! Example: //! //! ```rust //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! let pool = Pool::new(get_opts())?; //! //! let result: Option<(u8, u8, u8)> = "SELECT ?, ?, ?" //! .with((1, 2, 3)) // <- WithParams::with will construct an instance of QueryWithParams //! .first(&pool)?; // <- QueryWithParams is executed on the given pool //! //! assert_eq!(result.unwrap(), (1, 2, 3)); //! # }); //! ``` //! //! The `BatchQuery` trait is a helper for batch statement execution. It's implemented for //! `QueryWithParams` where parameters is an iterator over parameters: //! //! ```rust //! # mysql::doctest_wrapper!(__result, { //! use mysql::*; //! use mysql::prelude::*; //! //! let pool = Pool::new(get_opts())?; //! let mut conn = pool.get_conn()?; //! //! "CREATE TEMPORARY TABLE batch (x INT)".run(&mut conn)?; //! "INSERT INTO batch (x) VALUES (?)" //! .with((0..3).map(|x| (x,))) // <- QueryWithParams constructed with an iterator //! .batch(&mut conn)?; // <- batch execution is preformed here //! //! let result: Vec<u8> = "SELECT x FROM batch".fetch(conn)?; //! //! assert_eq!(result, vec![0, 1, 2]); //! # }); //! ``` //! //! ### `Queryable` //! //! The `Queryable` trait defines common methods for `Conn`, `PooledConn` and `Transaction`. //! The set of basic methods consts of: //! //! * `query_iter` - basic methods to execute text query and get `QueryRestul`; //! * `prep` - basic method to prepare a statement; //! * `exec_iter` - basic method to execute statement and get `QueryResult`; //! * `close` - basic method to close the statement; //! //! The trait also defines the set of helper methods, that is based on basic methods. //! These methods will consume only the firt result set, other result sets will be dropped: //! //! * `{query|exec}` - to collect the result into a `Vec<T: FromRow>`; //! * `{query|exec}_first` - to get the first `T: FromRow`, if any; //! * `{query|exec}_map` - to map each `T: FromRow` to some `U`; //! * `{query|exec}_fold` - to fold the set of `T: FromRow` to a single value; //! * `{query|exec}_drop` - to immediately drop the result. //! //! The trait also defines the `exec_batch` function, which is a helper for batch statement //! execution. //! //! [crate docs]: https://docs.rs/mysql //! [mysql_common docs]: https://docs.rs/mysql_common //! [max_prepared_stmt_count]: https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_max_prepared_stmt_count //! #![crate_name = "mysql"] #![crate_type = "rlib"] #![crate_type = "dylib"] #![cfg_attr(feature = "nightly", feature(test, const_fn))] #[cfg(feature = "nightly")] extern crate test; use mysql_common as myc; pub extern crate serde; pub extern crate serde_json; #[cfg(test)] #[macro_use] extern crate serde_derive; /// Reexport of `chrono` crate. pub use crate::myc::chrono; /// Reexport of `time` crate. pub use crate::myc::time; /// Reexport of `uuid` crate. pub use crate::myc::uuid; mod conn; pub mod error; mod io; #[doc(inline)] pub use crate::myc::constants as consts; #[doc(inline)] pub use crate::conn::local_infile::{LocalInfile, LocalInfileHandler}; #[doc(inline)] pub use crate::conn::opts::SslOpts; #[doc(inline)] pub use crate::conn::opts::{Opts, OptsBuilder, DEFAULT_STMT_CACHE_SIZE}; #[doc(inline)] pub use crate::conn::pool::{Pool, PooledConn}; #[doc(inline)] pub use crate::conn::query::QueryWithParams; #[doc(inline)] pub use crate::conn::query_result::{Binary, QueryResult, ResultSet, SetColumns, Text}; #[doc(inline)] pub use crate::conn::stmt::Statement; #[doc(inline)] pub use crate::conn::transaction::{AccessMode, IsolationLevel, Transaction, TxOpts}; #[doc(inline)] pub use crate::conn::Conn; #[doc(inline)] pub use crate::error::{DriverError, Error, MySqlError, Result, ServerError, UrlError}; #[doc(inline)] pub use crate::myc::packets::Column; #[doc(inline)] pub use crate::myc::params::Params; #[doc(inline)] pub use crate::myc::proto::codec::Compression; #[doc(inline)] pub use crate::myc::row::convert::{from_row, from_row_opt, FromRowError}; #[doc(inline)] pub use crate::myc::row::Row; #[doc(inline)] pub use crate::myc::value::convert::{from_value, from_value_opt, FromValueError}; #[doc(inline)] pub use crate::myc::value::json::{Deserialized, Serialized}; #[doc(inline)] pub use crate::myc::value::Value; pub mod prelude { #[doc(inline)] pub use crate::conn::query::{BatchQuery, BinQuery, TextQuery, WithParams}; #[doc(inline)] pub use crate::conn::queryable::{AsStatement, Queryable}; #[doc(inline)] pub use crate::myc::row::convert::FromRow; #[doc(inline)] pub use crate::myc::row::ColumnIndex; #[doc(inline)] pub use crate::myc::value::convert::{ConvIr, FromValue, ToValue}; } #[doc(inline)] pub use crate::myc::params; #[doc(hidden)] #[macro_export] macro_rules! def_database_url { () => { if let Ok(url) = std::env::var("DATABASE_URL") { let opts = $crate::Opts::from_url(&url).expect("DATABASE_URL invalid"); if opts .get_db_name() .expect("a database name is required") .is_empty() { panic!("database name is empty"); } url } else { "mysql://root:password@127.0.0.1:3307/mysql".into() } }; } #[doc(hidden)] #[macro_export] macro_rules! def_get_opts { () => { pub fn test_ssl() -> bool { let ssl = std::env::var("SSL").ok().unwrap_or("false".into()); ssl == "true" || ssl == "1" } pub fn test_compression() -> bool { let compress = std::env::var("COMPRESS").ok().unwrap_or("false".into()); compress == "true" || compress == "1" } pub fn get_opts() -> $crate::OptsBuilder { let database_url = $crate::def_database_url!(); let mut builder = $crate::OptsBuilder::from_opts(&*database_url) .init(vec!["SET GLOBAL sql_mode = 'TRADITIONAL'"]); if test_compression() { builder = builder.compress(Some(Default::default())); } if test_ssl() { let ssl_opts = $crate::SslOpts::default() .with_danger_skip_domain_validation(true) .with_danger_accept_invalid_certs(true); builder = builder.prefer_socket(false).ssl_opts(ssl_opts); } builder } }; } #[doc(hidden)] #[macro_export] macro_rules! doctest_wrapper { ($body:block) => { fn fun() { $crate::def_get_opts!(); $body; } fun() }; (__result, $body:block) => { fn fun() -> std::result::Result<(), Box<dyn std::error::Error>> { $crate::def_get_opts!(); Ok($body) } fun() }; } #[cfg(test)] mod test_misc { use lazy_static::lazy_static; use crate::{def_database_url, def_get_opts}; #[allow(dead_code)] fn error_should_implement_send_and_sync() { fn _dummy<T: Send + Sync>(_: T) {} _dummy(crate::error::Error::FromValueError(crate::Value::NULL)); } lazy_static! { pub static ref DATABASE_URL: String = def_database_url!(); } def_get_opts!(); }