2014-07-03 05:23:17 +00:00
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//! Rust-Postgres is a pure-Rust frontend for the popular PostgreSQL database. It
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//! exposes a high level interface in the vein of JDBC or Go's `database/sql`
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//! package.
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//!
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//! ```rust,no_run
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//! extern crate postgres;
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//! extern crate time;
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//!
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//! use time::Timespec;
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//!
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2014-08-19 05:02:16 +00:00
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//! use postgres::{PostgresConnection, NoSsl};
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2014-07-03 05:23:17 +00:00
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//!
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//! struct Person {
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//! id: i32,
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//! name: String,
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//! time_created: Timespec,
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//! data: Option<Vec<u8>>
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//! }
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//!
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//! fn main() {
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2014-08-19 05:02:16 +00:00
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//! let conn = PostgresConnection::connect("postgresql://postgres@localhost",
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//! &NoSsl).unwrap();
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2014-07-03 05:23:17 +00:00
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//!
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//! conn.execute("CREATE TABLE person (
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//! id SERIAL PRIMARY KEY,
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//! name VARCHAR NOT NULL,
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//! time_created TIMESTAMP NOT NULL,
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//! data BYTEA
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//! )", []).unwrap();
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//! let me = Person {
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//! id: 0,
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2014-07-10 19:35:57 +00:00
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//! name: "Steven".to_string(),
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2014-07-03 05:23:17 +00:00
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//! time_created: time::get_time(),
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//! data: None
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//! };
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//! conn.execute("INSERT INTO person (name, time_created, data)
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//! VALUES ($1, $2, $3)",
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2014-08-30 09:57:46 +00:00
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//! &[&me.name, &me.time_created, &me.data]).unwrap();
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2014-07-03 05:23:17 +00:00
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//!
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//! let stmt = conn.prepare("SELECT id, name, time_created, data FROM person")
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//! .unwrap();
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//! for row in stmt.query([]).unwrap() {
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//! let person = Person {
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2014-07-10 19:35:57 +00:00
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//! id: row.get(0u),
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//! name: row.get(1u),
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//! time_created: row.get(2u),
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//! data: row.get(3u)
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2014-07-03 05:23:17 +00:00
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//! };
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//! println!("Found person {}", person.name);
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//! }
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//! }
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//! ```
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2014-06-29 21:11:38 +00:00
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#![doc(html_root_url="http://www.rust-ci.org/sfackler/rust-postgres/doc")]
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2014-06-21 22:55:12 +00:00
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#![feature(macro_rules, struct_variant, phase, unsafe_destructor)]
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2014-08-16 02:25:12 +00:00
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#![warn(missing_doc)]
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2013-10-08 04:11:54 +00:00
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2014-02-15 23:03:35 +00:00
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extern crate collections;
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extern crate openssl;
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extern crate serialize;
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2014-02-22 07:18:39 +00:00
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extern crate time;
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2014-04-01 06:51:42 +00:00
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extern crate phf;
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2014-06-11 06:27:07 +00:00
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#[phase(plugin)]
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2014-04-23 05:10:06 +00:00
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extern crate phf_mac;
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2014-03-16 04:35:44 +00:00
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extern crate url;
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2014-06-11 06:27:07 +00:00
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#[phase(plugin, link)]
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2014-03-18 04:05:04 +00:00
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extern crate log;
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2013-08-04 02:17:32 +00:00
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2014-06-06 03:50:23 +00:00
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use collections::{Deque, RingBuf};
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2014-08-19 05:02:16 +00:00
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use url::{UserInfo, Url};
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2014-01-03 01:13:52 +00:00
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use openssl::crypto::hash::{MD5, Hasher};
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2014-05-04 19:21:52 +00:00
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use openssl::ssl::SslContext;
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2014-02-14 03:26:52 +00:00
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use serialize::hex::ToHex;
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2014-02-08 02:17:40 +00:00
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use std::cell::{Cell, RefCell};
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2014-06-06 03:50:23 +00:00
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use std::collections::HashMap;
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2014-09-30 05:56:43 +00:00
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use std::io::{BufferedStream, IoResult, MemWriter};
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2014-05-04 19:21:52 +00:00
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use std::io::net::ip::Port;
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2014-02-12 07:42:46 +00:00
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use std::mem;
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2014-08-19 05:02:16 +00:00
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use std::fmt;
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2013-08-04 02:17:32 +00:00
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2014-05-04 19:21:52 +00:00
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use error::{InvalidUrl,
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2014-02-12 07:42:46 +00:00
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MissingPassword,
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MissingUser,
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2014-02-07 04:58:47 +00:00
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PgConnectStreamError,
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2014-07-07 02:02:22 +00:00
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PgConnectBadResponse,
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2014-03-30 00:01:41 +00:00
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PgInvalidColumn,
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2014-02-12 07:42:46 +00:00
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PgStreamDesynchronized,
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PgStreamError,
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2014-03-28 04:39:03 +00:00
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PgWrongParamCount,
|
2014-01-14 05:04:19 +00:00
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PostgresConnectError,
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2014-02-12 07:42:46 +00:00
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PostgresDbError,
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PostgresError,
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2014-03-26 04:01:38 +00:00
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UnsupportedAuthentication,
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2014-05-19 02:34:01 +00:00
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PgWrongConnection,
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2014-07-07 02:02:22 +00:00
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PgWrongTransaction,
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PgBadResponse};
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2014-05-28 04:07:58 +00:00
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use io::{MaybeSslStream, InternalStream};
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2014-02-12 07:42:46 +00:00
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use message::{AuthenticationCleartextPassword,
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AuthenticationGSS,
|
2014-01-14 05:04:19 +00:00
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AuthenticationKerberosV5,
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AuthenticationMD5Password,
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2014-02-12 07:42:46 +00:00
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AuthenticationOk,
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2014-01-14 05:04:19 +00:00
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AuthenticationSCMCredential,
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AuthenticationSSPI,
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BackendKeyData,
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2014-02-12 07:42:46 +00:00
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BackendMessage,
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2014-01-14 05:04:19 +00:00
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BindComplete,
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2014-03-26 04:01:38 +00:00
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CommandComplete,
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2014-09-30 04:05:42 +00:00
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CopyInResponse,
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2014-01-14 05:04:19 +00:00
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DataRow,
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EmptyQueryResponse,
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ErrorResponse,
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NoData,
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NoticeResponse,
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NotificationResponse,
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ParameterDescription,
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ParameterStatus,
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ParseComplete,
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PortalSuspended,
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ReadyForQuery,
|
2014-03-26 04:01:38 +00:00
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RowDescription,
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RowDescriptionEntry};
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|
use message::{Bind,
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CancelRequest,
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Close,
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2014-09-30 05:56:43 +00:00
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CopyData,
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CopyDone,
|
2014-09-30 04:05:42 +00:00
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CopyFail,
|
2014-01-14 05:04:19 +00:00
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Describe,
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2014-03-26 04:01:38 +00:00
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Execute,
|
2014-02-12 07:42:46 +00:00
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FrontendMessage,
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2014-01-14 05:04:19 +00:00
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Parse,
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PasswordMessage,
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Query,
|
2014-02-12 07:42:46 +00:00
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StartupMessage,
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2014-01-14 05:04:19 +00:00
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Sync,
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Terminate};
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2014-02-16 02:59:16 +00:00
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use message::{WriteMessage, ReadMessage};
|
2014-09-30 06:41:13 +00:00
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use types::{Oid, PostgresType, ToSql, FromSql, PgUnknownType};
|
2013-07-25 07:10:18 +00:00
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|
|
2014-07-07 02:02:22 +00:00
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#[macro_escape]
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mod macros;
|
2014-02-10 06:45:26 +00:00
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|
2014-02-16 02:59:16 +00:00
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pub mod error;
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2014-05-04 19:21:52 +00:00
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mod io;
|
2014-02-16 02:59:16 +00:00
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pub mod pool;
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mod message;
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pub mod types;
|
2014-09-30 05:56:43 +00:00
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mod util;
|
2014-02-16 02:59:16 +00:00
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|
2014-04-08 03:52:41 +00:00
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static CANARY: u32 = 0xdeadbeef;
|
2013-10-21 00:32:14 +00:00
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|
2014-04-03 04:26:41 +00:00
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/// A typedef of the result returned by many methods.
|
2014-08-19 05:02:16 +00:00
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pub type PostgresResult<T> = Result<T, PostgresError>;
|
2014-04-03 04:26:41 +00:00
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|
2014-04-21 05:27:55 +00:00
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|
/// Specifies the target server to connect to.
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|
#[deriving(Clone)]
|
2014-08-19 05:02:16 +00:00
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pub enum PostgresConnectTarget {
|
2014-04-21 05:27:55 +00:00
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/// Connect via TCP to the specified host.
|
2014-05-26 03:38:40 +00:00
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TargetTcp(String),
|
2014-04-21 05:27:55 +00:00
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/// Connect via a Unix domain socket in the specified directory.
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TargetUnix(Path)
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}
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|
2014-07-26 00:24:10 +00:00
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/// Authentication information
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|
|
#[deriving(Clone)]
|
2014-08-19 05:02:16 +00:00
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pub struct PostgresUserInfo {
|
2014-07-26 00:24:10 +00:00
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|
/// The username
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|
|
pub user: String,
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|
|
/// An optional password
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|
|
pub password: Option<String>,
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|
}
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|
|
2014-04-21 05:27:55 +00:00
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|
/// Information necessary to open a new connection to a Postgres server.
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|
|
#[deriving(Clone)]
|
2014-08-19 05:02:16 +00:00
|
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|
pub struct PostgresConnectParams {
|
2014-04-21 05:27:55 +00:00
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/// The target server
|
2014-08-19 05:02:16 +00:00
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|
pub target: PostgresConnectTarget,
|
2014-04-22 05:53:14 +00:00
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|
/// The target port.
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///
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|
|
/// Defaults to 5432 if not specified.
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|
|
pub port: Option<Port>,
|
2014-04-21 05:27:55 +00:00
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|
/// The user to login as.
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///
|
2014-08-19 05:02:16 +00:00
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|
|
/// `PostgresConnection::connect` requires a user but `cancel_query` does
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/// not.
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pub user: Option<PostgresUserInfo>,
|
2014-04-21 05:27:55 +00:00
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|
/// The database to connect to. Defaults the value of `user`.
|
2014-05-26 03:38:40 +00:00
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pub database: Option<String>,
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2014-04-21 05:27:55 +00:00
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|
/// Runtime parameters to be passed to the Postgres backend.
|
2014-05-26 03:38:40 +00:00
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pub options: Vec<(String, String)>,
|
2014-04-21 05:27:55 +00:00
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}
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|
|
2014-08-19 05:02:16 +00:00
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|
/// A trait implemented by types that can be converted into a
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|
|
/// `PostgresConnectParams`.
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2014-04-21 05:27:55 +00:00
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|
pub trait IntoConnectParams {
|
2014-08-19 05:02:16 +00:00
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|
/// Converts the value of `self` into a `PostgresConnectParams`.
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|
fn into_connect_params(self) -> Result<PostgresConnectParams, PostgresConnectError>;
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2014-04-21 05:27:55 +00:00
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}
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|
|
2014-08-19 05:02:16 +00:00
|
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|
impl IntoConnectParams for PostgresConnectParams {
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fn into_connect_params(self) -> Result<PostgresConnectParams, PostgresConnectError> {
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2014-04-21 05:27:55 +00:00
|
|
|
Ok(self)
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|
|
}
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|
|
}
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|
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|
|
|
impl<'a> IntoConnectParams for &'a str {
|
2014-09-12 04:35:10 +00:00
|
|
|
#[allow(deprecated)]
|
2014-08-19 05:02:16 +00:00
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|
fn into_connect_params(self) -> Result<PostgresConnectParams, PostgresConnectError> {
|
2014-07-07 13:41:43 +00:00
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|
match Url::parse(self) {
|
2014-05-17 03:47:03 +00:00
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Ok(url) => url.into_connect_params(),
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Err(err) => return Err(InvalidUrl(err)),
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|
|
}
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|
|
}
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|
|
}
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|
|
impl IntoConnectParams for Url {
|
2014-09-24 07:18:27 +00:00
|
|
|
#[allow(deprecated)]
|
2014-08-19 05:02:16 +00:00
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|
|
fn into_connect_params(self) -> Result<PostgresConnectParams, PostgresConnectError> {
|
2014-04-21 05:27:55 +00:00
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|
let Url {
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|
host,
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|
port,
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|
user,
|
2014-07-07 13:41:43 +00:00
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path: url::Path { path, query: options, .. },
|
2014-04-21 05:27:55 +00:00
|
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|
..
|
2014-05-17 03:47:03 +00:00
|
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|
} = self;
|
2014-04-21 05:27:55 +00:00
|
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|
2014-10-05 03:08:44 +00:00
|
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|
let maybe_path = try!(url::decode_component(host[]).map_err(InvalidUrl));
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|
|
let target = if maybe_path[].starts_with("/") {
|
2014-04-22 04:43:00 +00:00
|
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|
TargetUnix(Path::new(maybe_path))
|
2014-04-21 05:27:55 +00:00
|
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|
} else {
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|
|
TargetTcp(host)
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|
|
};
|
|
|
|
|
2014-07-26 00:24:10 +00:00
|
|
|
let user = match user {
|
2014-08-21 05:40:11 +00:00
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|
|
Some(UserInfo { user, pass }) => Some(PostgresUserInfo { user: user, password: pass }),
|
2014-07-26 00:24:10 +00:00
|
|
|
None => None,
|
2014-04-21 05:27:55 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
let database = if !path.is_empty() {
|
|
|
|
// path contains the leading /
|
2014-10-05 03:08:44 +00:00
|
|
|
let (_, path) = path[].slice_shift_char();
|
2014-07-10 19:35:57 +00:00
|
|
|
Some(path.to_string())
|
2014-04-21 05:27:55 +00:00
|
|
|
} else {
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|
|
|
None
|
|
|
|
};
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
Ok(PostgresConnectParams {
|
2014-04-22 05:53:14 +00:00
|
|
|
target: target,
|
2014-04-21 05:27:55 +00:00
|
|
|
port: port,
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|
|
user: user,
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|
database: database,
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|
|
options: options,
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|
|
})
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|
|
}
|
|
|
|
}
|
|
|
|
|
2013-09-30 02:12:20 +00:00
|
|
|
/// Trait for types that can handle Postgres notice messages
|
2014-08-19 05:02:16 +00:00
|
|
|
pub trait PostgresNoticeHandler {
|
2013-09-30 02:12:20 +00:00
|
|
|
/// Handle a Postgres notice message
|
2013-09-12 02:57:26 +00:00
|
|
|
fn handle(&mut self, notice: PostgresDbError);
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|
|
|
}
|
|
|
|
|
2013-09-30 05:22:10 +00:00
|
|
|
/// A notice handler which logs at the `info` level.
|
2013-09-30 02:12:20 +00:00
|
|
|
///
|
2014-08-19 05:02:16 +00:00
|
|
|
/// This is the default handler used by a `PostgresConnection`.
|
2013-09-12 02:57:26 +00:00
|
|
|
pub struct DefaultNoticeHandler;
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl PostgresNoticeHandler for DefaultNoticeHandler {
|
2013-09-12 02:57:26 +00:00
|
|
|
fn handle(&mut self, notice: PostgresDbError) {
|
2013-10-21 04:06:12 +00:00
|
|
|
info!("{}: {}", notice.severity, notice.message);
|
2013-09-12 02:57:26 +00:00
|
|
|
}
|
2013-08-28 06:23:36 +00:00
|
|
|
}
|
|
|
|
|
2013-10-15 05:41:03 +00:00
|
|
|
/// An asynchronous notification
|
2014-08-19 05:02:16 +00:00
|
|
|
pub struct PostgresNotification {
|
2013-10-15 05:41:03 +00:00
|
|
|
/// The process ID of the notifying backend process
|
2014-08-16 03:14:46 +00:00
|
|
|
pub pid: u32,
|
2013-10-15 05:41:03 +00:00
|
|
|
/// The name of the channel that the notify has been raised on
|
2014-05-26 03:38:40 +00:00
|
|
|
pub channel: String,
|
2013-10-15 05:41:03 +00:00
|
|
|
/// The "payload" string passed from the notifying process
|
2014-05-26 03:38:40 +00:00
|
|
|
pub payload: String,
|
2013-10-15 05:41:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/// An iterator over asynchronous notifications
|
2014-08-19 05:02:16 +00:00
|
|
|
pub struct PostgresNotifications<'conn> {
|
|
|
|
conn: &'conn PostgresConnection
|
2013-10-15 05:41:03 +00:00
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl<'conn> Iterator<PostgresNotification> for PostgresNotifications<'conn> {
|
2013-10-15 05:41:03 +00:00
|
|
|
/// Returns the oldest pending notification or `None` if there are none.
|
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Note
|
2013-10-15 05:41:03 +00:00
|
|
|
///
|
|
|
|
/// `next` may return `Some` notification after returning `None` if a new
|
|
|
|
/// notification was received.
|
2014-08-19 05:02:16 +00:00
|
|
|
fn next(&mut self) -> Option<PostgresNotification> {
|
2014-03-23 04:20:22 +00:00
|
|
|
self.conn.conn.borrow_mut().notifications.pop_front()
|
2013-10-15 05:41:03 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-10-21 00:32:14 +00:00
|
|
|
/// Contains information necessary to cancel queries for a session
|
2014-08-19 05:02:16 +00:00
|
|
|
pub struct PostgresCancelData {
|
2013-10-21 00:32:14 +00:00
|
|
|
/// The process ID of the session
|
2014-08-16 03:14:46 +00:00
|
|
|
pub process_id: u32,
|
2013-10-21 00:32:14 +00:00
|
|
|
/// The secret key for the session
|
2014-08-16 03:14:46 +00:00
|
|
|
pub secret_key: u32,
|
2013-10-21 00:32:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/// Attempts to cancel an in-progress query.
|
|
|
|
///
|
|
|
|
/// The backend provides no information about whether a cancellation attempt
|
|
|
|
/// was successful or not. An error will only be returned if the driver was
|
|
|
|
/// unable to connect to the database.
|
|
|
|
///
|
2014-08-19 05:02:16 +00:00
|
|
|
/// A `PostgresCancelData` object can be created via
|
|
|
|
/// `PostgresConnection::cancel_data`. The object can cancel any query made on
|
|
|
|
/// that connection.
|
2014-03-09 22:22:20 +00:00
|
|
|
///
|
2014-08-21 05:40:11 +00:00
|
|
|
/// Only the host and port of the connection info are used. See
|
2014-08-19 05:02:16 +00:00
|
|
|
/// `PostgresConnection::connect` for details of the `params` argument.
|
2014-03-31 02:21:51 +00:00
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Example
|
2014-03-09 22:22:20 +00:00
|
|
|
///
|
2014-03-10 17:06:40 +00:00
|
|
|
/// ```rust,no_run
|
2014-08-19 05:02:16 +00:00
|
|
|
/// # use postgres::{PostgresConnection, NoSsl};
|
2014-03-09 22:22:20 +00:00
|
|
|
/// # let url = "";
|
2014-08-19 05:02:16 +00:00
|
|
|
/// let conn = PostgresConnection::connect(url, &NoSsl).unwrap();
|
2014-03-09 22:22:20 +00:00
|
|
|
/// let cancel_data = conn.cancel_data();
|
|
|
|
/// spawn(proc() {
|
2014-03-28 04:08:22 +00:00
|
|
|
/// conn.execute("SOME EXPENSIVE QUERY", []).unwrap();
|
2014-03-09 22:22:20 +00:00
|
|
|
/// });
|
|
|
|
/// # let _ =
|
|
|
|
/// postgres::cancel_query(url, &NoSsl, cancel_data);
|
|
|
|
/// ```
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn cancel_query<T>(params: T, ssl: &SslMode, data: PostgresCancelData)
|
|
|
|
-> Result<(), PostgresConnectError> where T: IntoConnectParams {
|
2014-04-21 05:27:55 +00:00
|
|
|
let params = try!(params.into_connect_params());
|
2014-09-06 23:33:43 +00:00
|
|
|
let mut socket = try!(io::initialize_stream(¶ms, ssl));
|
2013-10-21 00:32:14 +00:00
|
|
|
|
2014-03-24 00:34:50 +00:00
|
|
|
try_pg_conn!(socket.write_message(&CancelRequest {
|
2013-10-21 00:32:14 +00:00
|
|
|
code: message::CANCEL_CODE,
|
|
|
|
process_id: data.process_id,
|
|
|
|
secret_key: data.secret_key
|
2014-02-07 06:59:33 +00:00
|
|
|
}));
|
2014-03-24 00:34:50 +00:00
|
|
|
try_pg_conn!(socket.flush());
|
2013-10-21 00:32:14 +00:00
|
|
|
|
2013-12-06 07:20:50 +00:00
|
|
|
Ok(())
|
2013-10-21 00:32:14 +00:00
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
struct InnerPostgresConnection {
|
2014-04-21 05:27:55 +00:00
|
|
|
stream: BufferedStream<MaybeSslStream<InternalStream>>,
|
2013-12-06 07:20:50 +00:00
|
|
|
next_stmt_id: uint,
|
2014-08-19 05:02:16 +00:00
|
|
|
notice_handler: Box<PostgresNoticeHandler+Send>,
|
|
|
|
notifications: RingBuf<PostgresNotification>,
|
|
|
|
cancel_data: PostgresCancelData,
|
2014-05-26 03:38:40 +00:00
|
|
|
unknown_types: HashMap<Oid, String>,
|
2014-02-10 06:45:26 +00:00
|
|
|
desynchronized: bool,
|
2014-02-10 07:55:16 +00:00
|
|
|
finished: bool,
|
2014-05-19 02:34:01 +00:00
|
|
|
trans_depth: u32,
|
2014-04-08 03:52:41 +00:00
|
|
|
canary: u32,
|
2013-08-29 06:19:53 +00:00
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl Drop for InnerPostgresConnection {
|
2013-09-18 05:06:47 +00:00
|
|
|
fn drop(&mut self) {
|
2014-02-10 07:55:16 +00:00
|
|
|
if !self.finished {
|
2014-04-07 06:37:17 +00:00
|
|
|
let _ = self.finish_inner();
|
2014-02-10 07:55:16 +00:00
|
|
|
}
|
2013-08-29 06:19:53 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl InnerPostgresConnection {
|
2014-08-17 20:57:58 +00:00
|
|
|
fn connect<T>(params: T, ssl: &SslMode)
|
2014-08-19 05:02:16 +00:00
|
|
|
-> Result<InnerPostgresConnection, PostgresConnectError>
|
2014-08-17 20:57:58 +00:00
|
|
|
where T: IntoConnectParams {
|
2014-04-21 05:27:55 +00:00
|
|
|
let params = try!(params.into_connect_params());
|
2014-05-04 19:21:52 +00:00
|
|
|
let stream = try!(io::initialize_stream(¶ms, ssl));
|
2014-04-19 09:04:37 +00:00
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
let PostgresConnectParams {
|
2014-04-21 05:27:55 +00:00
|
|
|
user,
|
|
|
|
database,
|
|
|
|
mut options,
|
|
|
|
..
|
|
|
|
} = params;
|
|
|
|
|
|
|
|
let user = match user {
|
|
|
|
Some(user) => user,
|
|
|
|
None => return Err(MissingUser),
|
|
|
|
};
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
let mut conn = InnerPostgresConnection {
|
2014-05-28 04:07:58 +00:00
|
|
|
stream: BufferedStream::new(stream),
|
|
|
|
next_stmt_id: 0,
|
|
|
|
notice_handler: box DefaultNoticeHandler,
|
|
|
|
notifications: RingBuf::new(),
|
2014-08-19 05:02:16 +00:00
|
|
|
cancel_data: PostgresCancelData { process_id: 0, secret_key: 0 },
|
2014-05-28 04:07:58 +00:00
|
|
|
unknown_types: HashMap::new(),
|
|
|
|
desynchronized: false,
|
|
|
|
finished: false,
|
|
|
|
trans_depth: 0,
|
|
|
|
canary: CANARY,
|
|
|
|
};
|
|
|
|
|
2014-07-10 19:35:57 +00:00
|
|
|
options.push(("client_encoding".to_string(), "UTF8".to_string()));
|
2013-09-09 04:33:41 +00:00
|
|
|
// Postgres uses the value of TimeZone as the time zone for TIMESTAMP
|
|
|
|
// WITH TIME ZONE values. Timespec converts to GMT internally.
|
2014-07-10 19:35:57 +00:00
|
|
|
options.push(("TimeZone".to_string(), "GMT".to_string()));
|
2013-08-27 05:06:53 +00:00
|
|
|
// We have to clone here since we need the user again for auth
|
2014-07-26 00:24:10 +00:00
|
|
|
options.push(("user".to_string(), user.user.clone()));
|
2014-04-21 05:27:55 +00:00
|
|
|
match database {
|
2014-07-10 19:35:57 +00:00
|
|
|
Some(database) => options.push(("database".to_string(), database)),
|
2014-04-21 05:27:55 +00:00
|
|
|
None => {}
|
|
|
|
}
|
2014-04-18 21:29:51 +00:00
|
|
|
|
2014-03-24 00:34:50 +00:00
|
|
|
try_pg_conn!(conn.write_messages([StartupMessage {
|
2013-09-09 05:40:08 +00:00
|
|
|
version: message::PROTOCOL_VERSION,
|
2014-10-05 03:08:44 +00:00
|
|
|
parameters: options[]
|
2014-02-07 04:58:47 +00:00
|
|
|
}]));
|
2013-08-26 05:08:37 +00:00
|
|
|
|
2014-07-26 00:24:10 +00:00
|
|
|
try!(conn.handle_auth(user));
|
2013-08-04 02:17:32 +00:00
|
|
|
|
2013-08-22 05:52:15 +00:00
|
|
|
loop {
|
2014-09-27 20:55:47 +00:00
|
|
|
match try_pg_conn!(conn.read_message_()) {
|
2013-10-21 00:32:14 +00:00
|
|
|
BackendKeyData { process_id, secret_key } => {
|
|
|
|
conn.cancel_data.process_id = process_id;
|
|
|
|
conn.cancel_data.secret_key = secret_key;
|
|
|
|
}
|
2013-11-29 18:30:03 +00:00
|
|
|
ReadyForQuery { .. } => break,
|
2013-10-05 03:26:52 +00:00
|
|
|
ErrorResponse { fields } =>
|
2014-10-01 05:52:27 +00:00
|
|
|
return PostgresDbError::new_connect(fields),
|
2014-07-07 02:02:22 +00:00
|
|
|
_ => return Err(PgConnectBadResponse),
|
2013-09-09 03:35:24 +00:00
|
|
|
}
|
2013-08-05 00:48:48 +00:00
|
|
|
}
|
2013-08-23 05:24:14 +00:00
|
|
|
|
2013-08-27 04:19:24 +00:00
|
|
|
Ok(conn)
|
2013-08-05 00:48:48 +00:00
|
|
|
}
|
|
|
|
|
2014-08-20 04:49:27 +00:00
|
|
|
fn write_messages(&mut self, messages: &[FrontendMessage]) -> IoResult<()> {
|
2014-07-26 03:15:24 +00:00
|
|
|
debug_assert!(!self.desynchronized);
|
2013-11-10 04:58:38 +00:00
|
|
|
for message in messages.iter() {
|
2014-07-10 19:35:57 +00:00
|
|
|
try_desync!(self, self.stream.write_message(message));
|
2013-07-25 07:10:18 +00:00
|
|
|
}
|
2014-07-10 19:35:57 +00:00
|
|
|
Ok(try_desync!(self, self.stream.flush()))
|
2013-08-22 06:41:26 +00:00
|
|
|
}
|
2013-08-04 02:17:32 +00:00
|
|
|
|
2014-09-27 20:55:47 +00:00
|
|
|
fn read_message_(&mut self) -> IoResult<BackendMessage> {
|
2014-07-26 03:15:24 +00:00
|
|
|
debug_assert!(!self.desynchronized);
|
2013-09-09 03:35:24 +00:00
|
|
|
loop {
|
2014-07-10 19:35:57 +00:00
|
|
|
match try_desync!(self, self.stream.read_message()) {
|
2014-08-16 02:50:11 +00:00
|
|
|
NoticeResponse { fields } => {
|
2014-10-01 05:52:27 +00:00
|
|
|
match PostgresDbError::new_raw(fields) {
|
|
|
|
Ok(err) => self.notice_handler.handle(err),
|
|
|
|
Err(()) => {}
|
|
|
|
}
|
2014-08-16 02:50:11 +00:00
|
|
|
}
|
|
|
|
NotificationResponse { pid, channel, payload } => {
|
2014-08-19 05:02:16 +00:00
|
|
|
self.notifications.push(PostgresNotification {
|
2013-10-15 05:41:03 +00:00
|
|
|
pid: pid,
|
|
|
|
channel: channel,
|
|
|
|
payload: payload
|
2014-08-16 02:50:11 +00:00
|
|
|
})
|
|
|
|
}
|
|
|
|
ParameterStatus { parameter, value } => {
|
|
|
|
debug!("Parameter {} = {}", parameter, value)
|
|
|
|
}
|
2014-02-10 06:45:26 +00:00
|
|
|
val => return Ok(val)
|
2013-09-09 03:35:24 +00:00
|
|
|
}
|
2013-08-04 05:21:16 +00:00
|
|
|
}
|
2013-08-22 06:41:26 +00:00
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
fn handle_auth(&mut self, user: PostgresUserInfo) -> Result<(), PostgresConnectError> {
|
2014-09-27 20:55:47 +00:00
|
|
|
match try_pg_conn!(self.read_message_()) {
|
2014-02-07 04:58:47 +00:00
|
|
|
AuthenticationOk => return Ok(()),
|
2013-08-27 04:19:24 +00:00
|
|
|
AuthenticationCleartextPassword => {
|
2014-07-26 00:24:10 +00:00
|
|
|
let pass = match user.password {
|
2013-08-27 04:19:24 +00:00
|
|
|
Some(pass) => pass,
|
2014-02-07 04:58:47 +00:00
|
|
|
None => return Err(MissingPassword)
|
2013-08-27 04:19:24 +00:00
|
|
|
};
|
2014-04-01 06:51:42 +00:00
|
|
|
try_pg_conn!(self.write_messages([PasswordMessage {
|
2014-10-05 03:08:44 +00:00
|
|
|
password: pass[],
|
2014-04-01 06:51:42 +00:00
|
|
|
}]));
|
2013-09-09 03:35:24 +00:00
|
|
|
}
|
2013-11-06 06:04:12 +00:00
|
|
|
AuthenticationMD5Password { salt } => {
|
2014-07-26 00:24:10 +00:00
|
|
|
let pass = match user.password {
|
2013-11-06 06:04:12 +00:00
|
|
|
Some(pass) => pass,
|
2014-02-07 04:58:47 +00:00
|
|
|
None => return Err(MissingPassword)
|
2013-11-06 06:04:12 +00:00
|
|
|
};
|
2014-01-03 01:13:52 +00:00
|
|
|
let hasher = Hasher::new(MD5);
|
2014-04-22 05:53:14 +00:00
|
|
|
hasher.update(pass.as_bytes());
|
2014-07-26 00:24:10 +00:00
|
|
|
hasher.update(user.user.as_bytes());
|
2014-10-05 03:08:44 +00:00
|
|
|
let output = hasher.final()[].to_hex();
|
2014-01-03 01:13:52 +00:00
|
|
|
let hasher = Hasher::new(MD5);
|
|
|
|
hasher.update(output.as_bytes());
|
|
|
|
hasher.update(salt);
|
2014-05-24 03:08:14 +00:00
|
|
|
let output = format!("md5{}",
|
2014-10-05 03:08:44 +00:00
|
|
|
hasher.final()[].to_hex());
|
2014-03-24 00:34:50 +00:00
|
|
|
try_pg_conn!(self.write_messages([PasswordMessage {
|
2014-10-05 03:08:44 +00:00
|
|
|
password: output[]
|
2014-04-01 06:51:42 +00:00
|
|
|
}]));
|
2013-11-06 06:04:12 +00:00
|
|
|
}
|
|
|
|
AuthenticationKerberosV5
|
2013-09-12 05:02:32 +00:00
|
|
|
| AuthenticationSCMCredential
|
|
|
|
| AuthenticationGSS
|
2014-02-07 04:58:47 +00:00
|
|
|
| AuthenticationSSPI => return Err(UnsupportedAuthentication),
|
2014-10-01 05:52:27 +00:00
|
|
|
ErrorResponse { fields } => return PostgresDbError::new_connect(fields),
|
2014-07-07 02:02:22 +00:00
|
|
|
_ => {
|
|
|
|
self.desynchronized = true;
|
|
|
|
return Err(PgConnectBadResponse);
|
|
|
|
}
|
2013-09-09 03:35:24 +00:00
|
|
|
}
|
2013-08-27 04:19:24 +00:00
|
|
|
|
2014-09-27 20:55:47 +00:00
|
|
|
match try_pg_conn!(self.read_message_()) {
|
2014-02-07 04:58:47 +00:00
|
|
|
AuthenticationOk => Ok(()),
|
2014-10-01 05:52:27 +00:00
|
|
|
ErrorResponse { fields } => return PostgresDbError::new_connect(fields),
|
2014-07-07 02:02:22 +00:00
|
|
|
_ => {
|
|
|
|
self.desynchronized = true;
|
|
|
|
return Err(PgConnectBadResponse);
|
|
|
|
}
|
2013-09-09 03:35:24 +00:00
|
|
|
}
|
2013-08-26 05:08:37 +00:00
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
fn set_notice_handler(&mut self, handler: Box<PostgresNoticeHandler+Send>)
|
|
|
|
-> Box<PostgresNoticeHandler+Send> {
|
2014-02-11 03:20:53 +00:00
|
|
|
mem::replace(&mut self.notice_handler, handler)
|
2013-08-27 05:06:53 +00:00
|
|
|
}
|
|
|
|
|
2014-09-30 05:56:43 +00:00
|
|
|
fn raw_prepare(&mut self, query: &str)
|
|
|
|
-> PostgresResult<(String, Vec<PostgresType>, Vec<ResultDescription>)> {
|
2014-05-24 03:08:14 +00:00
|
|
|
let stmt_name = format!("s{}", self.next_stmt_id);
|
2013-09-20 04:06:45 +00:00
|
|
|
self.next_stmt_id += 1;
|
2013-08-05 00:48:48 +00:00
|
|
|
|
2014-03-24 00:34:50 +00:00
|
|
|
try_pg!(self.write_messages([
|
2013-11-10 04:58:38 +00:00
|
|
|
Parse {
|
2014-10-05 03:08:44 +00:00
|
|
|
name: stmt_name[],
|
2013-09-02 17:27:09 +00:00
|
|
|
query: query,
|
2014-03-30 23:19:04 +00:00
|
|
|
param_types: []
|
2013-09-02 17:27:09 +00:00
|
|
|
},
|
2013-11-10 04:58:38 +00:00
|
|
|
Describe {
|
2014-09-06 23:33:43 +00:00
|
|
|
variant: b'S',
|
2014-10-05 03:08:44 +00:00
|
|
|
name: stmt_name[],
|
2013-09-02 17:27:09 +00:00
|
|
|
},
|
2014-02-07 04:58:47 +00:00
|
|
|
Sync]));
|
2013-08-22 06:41:26 +00:00
|
|
|
|
2014-09-27 20:55:47 +00:00
|
|
|
match try_pg!(self.read_message_()) {
|
2013-10-25 05:30:34 +00:00
|
|
|
ParseComplete => {}
|
2013-08-29 05:33:27 +00:00
|
|
|
ErrorResponse { fields } => {
|
2014-02-22 07:18:39 +00:00
|
|
|
try!(self.wait_for_ready());
|
2014-10-01 05:52:27 +00:00
|
|
|
return PostgresDbError::new(fields);
|
2013-09-04 03:07:10 +00:00
|
|
|
}
|
2014-07-10 19:35:57 +00:00
|
|
|
_ => bad_response!(self),
|
2013-09-09 03:35:24 +00:00
|
|
|
}
|
2013-08-22 06:41:26 +00:00
|
|
|
|
2014-09-27 20:55:47 +00:00
|
|
|
let mut param_types: Vec<PostgresType> = match try_pg!(self.read_message_()) {
|
2014-08-16 02:50:11 +00:00
|
|
|
ParameterDescription { types } => {
|
|
|
|
types.iter().map(|ty| PostgresType::from_oid(*ty)).collect()
|
|
|
|
}
|
2014-07-10 19:35:57 +00:00
|
|
|
_ => bad_response!(self),
|
2013-09-09 03:35:24 +00:00
|
|
|
};
|
2013-08-22 06:41:26 +00:00
|
|
|
|
2014-09-27 20:55:47 +00:00
|
|
|
let mut result_desc: Vec<ResultDescription> = match try_pg!(self.read_message_()) {
|
2014-08-16 02:50:11 +00:00
|
|
|
RowDescription { descriptions } => {
|
2014-09-18 05:57:23 +00:00
|
|
|
descriptions.into_iter().map(|RowDescriptionEntry { name, type_oid, .. }| {
|
2014-04-03 05:56:16 +00:00
|
|
|
ResultDescription {
|
|
|
|
name: name,
|
|
|
|
ty: PostgresType::from_oid(type_oid)
|
|
|
|
}
|
2014-08-16 02:50:11 +00:00
|
|
|
}).collect()
|
|
|
|
}
|
2014-05-26 18:41:18 +00:00
|
|
|
NoData => vec![],
|
2014-07-10 19:35:57 +00:00
|
|
|
_ => bad_response!(self)
|
2013-09-09 03:35:24 +00:00
|
|
|
};
|
2013-08-17 22:09:26 +00:00
|
|
|
|
2014-02-22 07:18:39 +00:00
|
|
|
try!(self.wait_for_ready());
|
2013-08-22 06:41:26 +00:00
|
|
|
|
2013-12-04 08:18:28 +00:00
|
|
|
// now that the connection is ready again, get unknown type names
|
2014-09-24 07:18:27 +00:00
|
|
|
try!(self.set_type_names(param_types.iter_mut()));
|
|
|
|
try!(self.set_type_names(result_desc.iter_mut().map(|d| &mut d.ty)));
|
2013-12-04 08:18:28 +00:00
|
|
|
|
2014-09-30 05:56:43 +00:00
|
|
|
Ok((stmt_name, param_types, result_desc))
|
|
|
|
}
|
|
|
|
|
|
|
|
fn prepare<'a>(&mut self, query: &str, conn: &'a PostgresConnection)
|
|
|
|
-> PostgresResult<PostgresStatement<'a>> {
|
|
|
|
let (stmt_name, param_types, result_desc) = try!(self.raw_prepare(query));
|
2014-08-19 05:02:16 +00:00
|
|
|
Ok(PostgresStatement {
|
2014-03-26 04:01:38 +00:00
|
|
|
conn: conn,
|
|
|
|
name: stmt_name,
|
|
|
|
param_types: param_types,
|
|
|
|
result_desc: result_desc,
|
|
|
|
next_portal_id: Cell::new(0),
|
2014-04-26 06:14:55 +00:00
|
|
|
finished: false,
|
2014-03-26 04:01:38 +00:00
|
|
|
})
|
2013-08-22 06:41:26 +00:00
|
|
|
}
|
|
|
|
|
2014-09-30 05:56:43 +00:00
|
|
|
fn prepare_copy_in<'a>(&mut self, table: &str, rows: &[&str], conn: &'a PostgresConnection)
|
|
|
|
-> PostgresResult<PostgresCopyInStatement<'a>> {
|
|
|
|
let mut query = MemWriter::new();
|
|
|
|
let _ = write!(query, "SELECT ");
|
|
|
|
let _ = util::comma_join(&mut query, rows.iter().map(|&e| e));
|
|
|
|
let _ = write!(query, " FROM {}", table);
|
|
|
|
let query = String::from_utf8(query.unwrap()).unwrap();
|
2014-10-05 03:08:44 +00:00
|
|
|
let (stmt_name, _, result_desc) = try!(self.raw_prepare(query[]));
|
2014-09-30 05:56:43 +00:00
|
|
|
|
|
|
|
let column_types = result_desc.iter().map(|desc| desc.ty.clone()).collect();
|
2014-10-05 03:08:44 +00:00
|
|
|
try!(self.close_statement(stmt_name[]));
|
2014-09-30 05:56:43 +00:00
|
|
|
|
|
|
|
let mut query = MemWriter::new();
|
|
|
|
let _ = write!(query, "COPY {} (", table);
|
|
|
|
let _ = util::comma_join(&mut query, rows.iter().map(|&e| e));
|
|
|
|
let _ = write!(query, ") FROM STDIN WITH (FORMAT binary)");
|
|
|
|
let query = String::from_utf8(query.unwrap()).unwrap();
|
2014-10-05 03:08:44 +00:00
|
|
|
let (stmt_name, _, _) = try!(self.raw_prepare(query[]));
|
2014-09-30 05:56:43 +00:00
|
|
|
|
|
|
|
Ok(PostgresCopyInStatement {
|
|
|
|
conn: conn,
|
|
|
|
name: stmt_name,
|
|
|
|
column_types: column_types,
|
|
|
|
finished: false,
|
|
|
|
})
|
|
|
|
}
|
|
|
|
|
|
|
|
fn close_statement(&mut self, stmt_name: &str) -> PostgresResult<()> {
|
|
|
|
try_pg!(self.write_messages([
|
|
|
|
Close {
|
|
|
|
variant: b'S',
|
|
|
|
name: stmt_name,
|
|
|
|
},
|
|
|
|
Sync]));
|
|
|
|
loop {
|
|
|
|
match try_pg!(self.read_message_()) {
|
|
|
|
ReadyForQuery { .. } => break,
|
|
|
|
ErrorResponse { fields } => {
|
|
|
|
try!(self.wait_for_ready());
|
2014-10-01 05:52:27 +00:00
|
|
|
return PostgresDbError::new(fields);
|
2014-09-30 05:56:43 +00:00
|
|
|
}
|
|
|
|
_ => {}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
Ok(())
|
|
|
|
}
|
|
|
|
|
2014-09-06 23:33:43 +00:00
|
|
|
fn set_type_names<'a, I>(&mut self, mut it: I) -> PostgresResult<()>
|
|
|
|
where I: Iterator<&'a mut PostgresType> {
|
2014-03-30 23:19:04 +00:00
|
|
|
for ty in it {
|
|
|
|
match *ty {
|
2014-08-16 02:50:11 +00:00
|
|
|
PgUnknownType { oid, ref mut name } => *name = try!(self.get_type_name(oid)),
|
2014-03-30 23:19:04 +00:00
|
|
|
_ => {}
|
|
|
|
}
|
|
|
|
}
|
2014-08-16 02:50:11 +00:00
|
|
|
|
2014-03-30 23:19:04 +00:00
|
|
|
Ok(())
|
2014-02-10 07:55:16 +00:00
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
fn get_type_name(&mut self, oid: Oid) -> PostgresResult<String> {
|
2013-12-04 08:18:28 +00:00
|
|
|
match self.unknown_types.find(&oid) {
|
2014-02-07 04:58:47 +00:00
|
|
|
Some(name) => return Ok(name.clone()),
|
2013-12-04 08:18:28 +00:00
|
|
|
None => {}
|
|
|
|
}
|
2014-04-03 05:56:16 +00:00
|
|
|
let name = try!(self.quick_query(format!("SELECT typname FROM pg_type \
|
2014-10-05 03:08:44 +00:00
|
|
|
WHERE oid={}", oid)[]))
|
2014-09-18 05:57:23 +00:00
|
|
|
.into_iter().next().unwrap().into_iter().next().unwrap().unwrap();
|
2013-12-04 08:18:28 +00:00
|
|
|
self.unknown_types.insert(oid, name.clone());
|
2014-02-07 04:58:47 +00:00
|
|
|
Ok(name)
|
2013-12-04 08:18:28 +00:00
|
|
|
}
|
|
|
|
|
2014-03-30 23:19:04 +00:00
|
|
|
fn is_desynchronized(&self) -> bool {
|
|
|
|
self.desynchronized
|
|
|
|
}
|
|
|
|
|
2014-04-08 03:52:41 +00:00
|
|
|
fn canary(&self) -> u32 {
|
|
|
|
self.canary
|
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
fn wait_for_ready(&mut self) -> PostgresResult<()> {
|
2014-09-27 20:55:47 +00:00
|
|
|
match try_pg!(self.read_message_()) {
|
2014-02-07 04:58:47 +00:00
|
|
|
ReadyForQuery { .. } => Ok(()),
|
2014-07-10 19:35:57 +00:00
|
|
|
_ => bad_response!(self)
|
2013-09-20 04:06:45 +00:00
|
|
|
}
|
|
|
|
}
|
2013-12-04 07:48:46 +00:00
|
|
|
|
2014-08-20 04:49:27 +00:00
|
|
|
fn quick_query(&mut self, query: &str) -> PostgresResult<Vec<Vec<Option<String>>>> {
|
2014-02-10 07:55:16 +00:00
|
|
|
check_desync!(self);
|
2014-03-24 00:34:50 +00:00
|
|
|
try_pg!(self.write_messages([Query { query: query }]));
|
2013-12-04 07:48:46 +00:00
|
|
|
|
2014-05-26 18:41:18 +00:00
|
|
|
let mut result = vec![];
|
2013-12-04 07:48:46 +00:00
|
|
|
loop {
|
2014-09-27 20:55:47 +00:00
|
|
|
match try_pg!(self.read_message_()) {
|
2013-12-04 07:48:46 +00:00
|
|
|
ReadyForQuery { .. } => break,
|
2014-04-26 21:46:38 +00:00
|
|
|
DataRow { row } => {
|
2014-09-18 05:57:23 +00:00
|
|
|
result.push(row.into_iter().map(|opt| {
|
2014-10-05 03:08:44 +00:00
|
|
|
opt.map(|b| String::from_utf8_lossy(b[]).into_string())
|
2014-05-16 02:27:19 +00:00
|
|
|
}).collect());
|
2014-04-26 21:46:38 +00:00
|
|
|
}
|
2014-10-06 00:31:25 +00:00
|
|
|
CopyInResponse { .. } => {
|
|
|
|
try_pg!(self.write_messages([
|
|
|
|
CopyFail {
|
|
|
|
message: "COPY queries cannot be directly executed",
|
|
|
|
},
|
|
|
|
Sync]));
|
|
|
|
}
|
2014-02-12 07:09:27 +00:00
|
|
|
ErrorResponse { fields } => {
|
2014-02-22 07:18:39 +00:00
|
|
|
try!(self.wait_for_ready());
|
2014-10-01 05:52:27 +00:00
|
|
|
return PostgresDbError::new(fields);
|
2014-02-12 07:09:27 +00:00
|
|
|
}
|
2013-12-04 07:48:46 +00:00
|
|
|
_ => {}
|
|
|
|
}
|
|
|
|
}
|
2014-02-07 04:58:47 +00:00
|
|
|
Ok(result)
|
2013-12-04 07:48:46 +00:00
|
|
|
}
|
2014-02-10 07:55:16 +00:00
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
fn finish_inner(&mut self) -> PostgresResult<()> {
|
2014-02-10 07:55:16 +00:00
|
|
|
check_desync!(self);
|
2014-04-08 03:52:41 +00:00
|
|
|
self.canary = 0;
|
2014-04-26 06:14:55 +00:00
|
|
|
try_pg!(self.write_messages([Terminate]));
|
|
|
|
Ok(())
|
2014-02-10 07:55:16 +00:00
|
|
|
}
|
2013-09-20 04:06:45 +00:00
|
|
|
}
|
|
|
|
|
2013-09-30 02:12:20 +00:00
|
|
|
/// A connection to a Postgres database.
|
2014-08-19 05:02:16 +00:00
|
|
|
pub struct PostgresConnection {
|
|
|
|
conn: RefCell<InnerPostgresConnection>
|
2013-10-01 07:40:46 +00:00
|
|
|
}
|
2013-09-20 04:06:45 +00:00
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl PostgresConnection {
|
2014-03-28 04:08:22 +00:00
|
|
|
/// Creates a new connection to a Postgres database.
|
2013-09-30 02:12:20 +00:00
|
|
|
///
|
2014-04-21 05:27:55 +00:00
|
|
|
/// Most applications can use a URL string in the normal format:
|
2013-09-30 02:12:20 +00:00
|
|
|
///
|
2014-03-09 06:01:24 +00:00
|
|
|
/// ```notrust
|
2014-04-21 05:27:55 +00:00
|
|
|
/// postgresql://user[:password]@host[:port][/database][?param1=val1[[¶m2=val2]...]]
|
2013-09-30 02:12:20 +00:00
|
|
|
/// ```
|
|
|
|
///
|
|
|
|
/// The password may be omitted if not required. The default Postgres port
|
|
|
|
/// (5432) is used if none is specified. The database name defaults to the
|
|
|
|
/// username if not specified.
|
2014-03-09 22:22:20 +00:00
|
|
|
///
|
2014-04-21 05:27:55 +00:00
|
|
|
/// To connect to the server via Unix sockets, `host` should be set to the
|
2014-04-21 05:53:54 +00:00
|
|
|
/// absolute path of the directory containing the socket file. Since `/` is
|
|
|
|
/// a reserved character in URLs, the path should be URL encoded. If the
|
2014-08-19 05:02:16 +00:00
|
|
|
/// path contains non-UTF 8 characters, a `PostgresConnectParams` struct
|
|
|
|
/// should be created manually and passed in. Note that Postgres does not
|
|
|
|
/// support SSL over Unix sockets.
|
2014-04-21 05:27:55 +00:00
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Examples
|
2014-03-09 22:22:20 +00:00
|
|
|
///
|
2014-03-10 17:06:40 +00:00
|
|
|
/// ```rust,no_run
|
2014-08-19 05:02:16 +00:00
|
|
|
/// # use postgres::{PostgresConnection, NoSsl};
|
2014-08-20 04:49:27 +00:00
|
|
|
/// # let _ = || {
|
2014-04-21 05:27:55 +00:00
|
|
|
/// let url = "postgresql://postgres:hunter2@localhost:2994/foodb";
|
2014-08-20 04:49:27 +00:00
|
|
|
/// let conn = try!(PostgresConnection::connect(url, &NoSsl));
|
|
|
|
/// # Ok(()) };
|
2014-03-09 22:22:20 +00:00
|
|
|
/// ```
|
2014-04-18 21:29:51 +00:00
|
|
|
///
|
2014-04-19 18:10:27 +00:00
|
|
|
/// ```rust,no_run
|
2014-08-19 05:02:16 +00:00
|
|
|
/// # use postgres::{PostgresConnection, NoSsl};
|
2014-08-20 04:49:27 +00:00
|
|
|
/// # let _ = || {
|
2014-04-22 05:53:14 +00:00
|
|
|
/// let url = "postgresql://postgres@%2Frun%2Fpostgres";
|
2014-08-20 04:49:27 +00:00
|
|
|
/// let conn = try!(PostgresConnection::connect(url, &NoSsl));
|
|
|
|
/// # Ok(()) };
|
2014-04-18 21:29:51 +00:00
|
|
|
/// ```
|
2014-04-22 05:53:14 +00:00
|
|
|
///
|
|
|
|
/// ```rust,no_run
|
2014-08-19 05:02:16 +00:00
|
|
|
/// # use postgres::{PostgresConnection, PostgresUserInfo, PostgresConnectParams, NoSsl, TargetUnix};
|
2014-08-20 04:49:27 +00:00
|
|
|
/// # let _ = || {
|
2014-04-22 05:53:14 +00:00
|
|
|
/// # let some_crazy_path = Path::new("");
|
2014-08-19 05:02:16 +00:00
|
|
|
/// let params = PostgresConnectParams {
|
2014-04-22 05:53:14 +00:00
|
|
|
/// target: TargetUnix(some_crazy_path),
|
|
|
|
/// port: None,
|
2014-08-19 05:02:16 +00:00
|
|
|
/// user: Some(PostgresUserInfo {
|
2014-07-26 00:24:10 +00:00
|
|
|
/// user: "postgres".to_string(),
|
|
|
|
/// password: None
|
|
|
|
/// }),
|
2014-04-22 05:53:14 +00:00
|
|
|
/// database: None,
|
2014-05-26 18:41:18 +00:00
|
|
|
/// options: vec![],
|
2014-04-22 05:53:14 +00:00
|
|
|
/// };
|
2014-08-20 04:49:27 +00:00
|
|
|
/// let conn = try!(PostgresConnection::connect(params, &NoSsl));
|
|
|
|
/// # Ok(()) };
|
2014-04-22 05:53:14 +00:00
|
|
|
/// ```
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn connect<T>(params: T, ssl: &SslMode) -> Result<PostgresConnection, PostgresConnectError>
|
2014-08-17 20:57:58 +00:00
|
|
|
where T: IntoConnectParams {
|
2014-08-19 05:02:16 +00:00
|
|
|
InnerPostgresConnection::connect(params, ssl).map(|conn| {
|
|
|
|
PostgresConnection { conn: RefCell::new(conn) }
|
|
|
|
})
|
2014-04-18 21:29:51 +00:00
|
|
|
}
|
|
|
|
|
2013-09-30 02:12:20 +00:00
|
|
|
/// Sets the notice handler for the connection, returning the old handler.
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn set_notice_handler(&self, handler: Box<PostgresNoticeHandler+Send>)
|
|
|
|
-> Box<PostgresNoticeHandler+Send> {
|
2014-03-19 04:00:06 +00:00
|
|
|
self.conn.borrow_mut().set_notice_handler(handler)
|
2013-09-20 04:06:45 +00:00
|
|
|
}
|
|
|
|
|
2013-10-15 05:41:03 +00:00
|
|
|
/// Returns an iterator over asynchronous notification messages.
|
|
|
|
///
|
|
|
|
/// Use the `LISTEN` command to register this connection for notifications.
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn notifications<'a>(&'a self) -> PostgresNotifications<'a> {
|
2014-09-06 23:33:43 +00:00
|
|
|
PostgresNotifications { conn: self }
|
2013-10-15 05:41:03 +00:00
|
|
|
}
|
|
|
|
|
2014-03-28 04:08:22 +00:00
|
|
|
/// Creates a new prepared statement.
|
2013-09-30 02:12:20 +00:00
|
|
|
///
|
|
|
|
/// A statement may contain parameters, specified by `$n` where `n` is the
|
|
|
|
/// index of the parameter in the list provided at execution time,
|
|
|
|
/// 1-indexed.
|
|
|
|
///
|
|
|
|
/// The statement is associated with the connection that created it and may
|
|
|
|
/// not outlive that connection.
|
2014-03-09 22:22:20 +00:00
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Example
|
2014-03-09 22:22:20 +00:00
|
|
|
///
|
2014-03-10 17:06:40 +00:00
|
|
|
/// ```rust,no_run
|
2014-08-19 05:02:16 +00:00
|
|
|
/// # use postgres::{PostgresConnection, NoSsl};
|
|
|
|
/// # let conn = PostgresConnection::connect("", &NoSsl).unwrap();
|
2014-03-28 04:08:22 +00:00
|
|
|
/// let maybe_stmt = conn.prepare("SELECT foo FROM bar WHERE baz = $1");
|
2014-03-09 22:22:20 +00:00
|
|
|
/// let stmt = match maybe_stmt {
|
|
|
|
/// Ok(stmt) => stmt,
|
|
|
|
/// Err(err) => fail!("Error preparing statement: {}", err)
|
|
|
|
/// };
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn prepare<'a>(&'a self, query: &str) -> PostgresResult<PostgresStatement<'a>> {
|
2014-05-19 02:34:01 +00:00
|
|
|
let mut conn = self.conn.borrow_mut();
|
|
|
|
if conn.trans_depth != 0 {
|
|
|
|
return Err(PgWrongTransaction);
|
|
|
|
}
|
|
|
|
conn.prepare(query, self)
|
2013-09-20 04:06:45 +00:00
|
|
|
}
|
|
|
|
|
2014-09-30 07:01:15 +00:00
|
|
|
/// Creates a new COPY FROM STDIN prepared statement.
|
|
|
|
///
|
|
|
|
/// These statements provide a method to efficiently bulk-upload data to
|
|
|
|
/// the database.
|
|
|
|
///
|
|
|
|
/// ## Example
|
|
|
|
///
|
|
|
|
/// ```rust,no_run
|
|
|
|
/// # use postgres::{PostgresConnection, NoSsl};
|
|
|
|
/// # use postgres::types::ToSql;
|
|
|
|
/// # let _ = || {
|
|
|
|
/// # let conn = PostgresConnection::connect("", &NoSsl).unwrap();
|
|
|
|
/// try!(conn.execute("CREATE TABLE foo (
|
|
|
|
/// bar INT PRIMARY KEY,
|
|
|
|
/// baz VARCHAR
|
|
|
|
/// )", []));
|
|
|
|
///
|
|
|
|
/// let stmt = try!(conn.prepare_copy_in("foo", ["bar", "baz"]));
|
|
|
|
/// let data: &[&[&ToSql]] = &[&[&0i32, &"blah".to_string()],
|
|
|
|
/// &[&1i32, &None::<String>]];
|
|
|
|
/// try!(stmt.execute(data.iter().map(|r| r.iter().map(|&e| e))));
|
|
|
|
/// # Ok(()) };
|
|
|
|
/// ```
|
2014-09-30 05:56:43 +00:00
|
|
|
pub fn prepare_copy_in<'a>(&'a self, table: &str, rows: &[&str])
|
|
|
|
-> PostgresResult<PostgresCopyInStatement<'a>> {
|
|
|
|
let mut conn = self.conn.borrow_mut();
|
|
|
|
if conn.trans_depth != 0 {
|
|
|
|
return Err(PgWrongTransaction);
|
|
|
|
}
|
|
|
|
conn.prepare_copy_in(table, rows, self)
|
|
|
|
}
|
|
|
|
|
2014-03-28 04:08:22 +00:00
|
|
|
/// Begins a new transaction.
|
2013-09-30 02:12:20 +00:00
|
|
|
///
|
2013-10-14 01:58:31 +00:00
|
|
|
/// Returns a `PostgresTransaction` object which should be used instead of
|
|
|
|
/// the connection for the duration of the transaction. The transaction
|
2013-10-15 02:36:01 +00:00
|
|
|
/// is active until the `PostgresTransaction` object falls out of scope.
|
2014-07-26 05:41:10 +00:00
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Note
|
2014-10-06 03:49:09 +00:00
|
|
|
/// A transaction will roll back by default. The `set_commit`,
|
|
|
|
/// `set_rollback`, and `commit` methods alter this behavior.
|
2014-03-09 22:22:20 +00:00
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Example
|
2014-03-09 22:22:20 +00:00
|
|
|
///
|
2014-03-10 17:06:40 +00:00
|
|
|
/// ```rust,no_run
|
2014-08-19 05:02:16 +00:00
|
|
|
/// # use postgres::{PostgresConnection, NoSsl};
|
2014-03-09 22:22:20 +00:00
|
|
|
/// # fn foo() -> Result<(), postgres::error::PostgresError> {
|
2014-08-19 05:02:16 +00:00
|
|
|
/// # let conn = PostgresConnection::connect("", &NoSsl).unwrap();
|
2014-03-28 04:08:22 +00:00
|
|
|
/// let trans = try!(conn.transaction());
|
|
|
|
/// try!(trans.execute("UPDATE foo SET bar = 10", []));
|
2014-07-26 05:41:10 +00:00
|
|
|
/// // ...
|
2014-03-09 22:22:20 +00:00
|
|
|
///
|
2014-10-06 03:47:48 +00:00
|
|
|
/// try!(trans.commit());
|
2014-03-09 22:22:20 +00:00
|
|
|
/// # Ok(())
|
|
|
|
/// # }
|
|
|
|
/// ```
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn transaction<'a>(&'a self) -> PostgresResult<PostgresTransaction<'a>> {
|
2014-09-13 05:07:10 +00:00
|
|
|
let mut conn = self.conn.borrow_mut();
|
|
|
|
check_desync!(conn);
|
|
|
|
if conn.trans_depth != 0 {
|
2014-05-19 02:34:01 +00:00
|
|
|
return Err(PgWrongTransaction);
|
|
|
|
}
|
2014-09-13 05:07:10 +00:00
|
|
|
try!(conn.quick_query("BEGIN"));
|
|
|
|
conn.trans_depth += 1;
|
2014-02-10 06:45:26 +00:00
|
|
|
Ok(PostgresTransaction {
|
2013-08-27 05:40:23 +00:00
|
|
|
conn: self,
|
2014-07-26 05:41:10 +00:00
|
|
|
commit: Cell::new(false),
|
2014-05-19 02:34:01 +00:00
|
|
|
depth: 1,
|
2014-02-10 07:55:16 +00:00
|
|
|
finished: false,
|
2014-02-10 06:45:26 +00:00
|
|
|
})
|
|
|
|
}
|
|
|
|
|
2013-12-29 03:24:52 +00:00
|
|
|
/// A convenience function for queries that are only run once.
|
2013-09-30 02:12:20 +00:00
|
|
|
///
|
|
|
|
/// If an error is returned, it could have come from either the preparation
|
|
|
|
/// or execution of the statement.
|
|
|
|
///
|
|
|
|
/// On success, returns the number of rows modified or 0 if not applicable.
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn execute(&self, query: &str, params: &[&ToSql]) -> PostgresResult<uint> {
|
2014-03-28 04:08:22 +00:00
|
|
|
self.prepare(query).and_then(|stmt| stmt.execute(params))
|
2013-09-01 18:06:33 +00:00
|
|
|
}
|
|
|
|
|
2014-06-08 23:07:15 +00:00
|
|
|
/// Execute a sequence of SQL statements.
|
|
|
|
///
|
|
|
|
/// Statements should be separated by `;` characters. If an error occurs,
|
|
|
|
/// execution of the sequence will stop at that point. This is intended for
|
|
|
|
/// execution of batches of non-dynamic statements - for example, creation
|
|
|
|
/// of a schema for a fresh database.
|
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Warning
|
2014-06-08 23:07:15 +00:00
|
|
|
///
|
|
|
|
/// Prepared statements should be used for any SQL statement which contains
|
|
|
|
/// user-specified data, as it provides functionality to safely embed that
|
|
|
|
/// data in the statment. Do not form statements via string concatenation
|
|
|
|
/// and feed them into this method.
|
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Example
|
2014-06-08 23:07:15 +00:00
|
|
|
///
|
2014-06-08 23:12:27 +00:00
|
|
|
/// ```rust,no_run
|
2014-08-19 05:02:16 +00:00
|
|
|
/// # use postgres::{PostgresConnection, PostgresResult};
|
|
|
|
/// fn init_db(conn: &PostgresConnection) -> PostgresResult<()> {
|
2014-07-26 00:56:43 +00:00
|
|
|
/// conn.batch_execute("
|
2014-06-08 23:07:15 +00:00
|
|
|
/// CREATE TABLE person (
|
|
|
|
/// id SERIAL PRIMARY KEY,
|
|
|
|
/// name NOT NULL
|
|
|
|
/// );
|
|
|
|
///
|
|
|
|
/// CREATE TABLE purchase (
|
|
|
|
/// id SERIAL PRIMARY KEY,
|
|
|
|
/// person INT NOT NULL REFERENCES person (id),
|
|
|
|
/// time TIMESTAMPTZ NOT NULL,
|
|
|
|
/// );
|
|
|
|
///
|
|
|
|
/// CREATE INDEX ON purchase (time);
|
2014-07-26 00:56:43 +00:00
|
|
|
/// ")
|
2014-06-08 23:07:15 +00:00
|
|
|
/// }
|
|
|
|
/// ```
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn batch_execute(&self, query: &str) -> PostgresResult<()> {
|
2014-06-08 23:07:15 +00:00
|
|
|
let mut conn = self.conn.borrow_mut();
|
|
|
|
if conn.trans_depth != 0 {
|
|
|
|
return Err(PgWrongTransaction);
|
|
|
|
}
|
|
|
|
conn.quick_query(query).map(|_| ())
|
|
|
|
}
|
|
|
|
|
2013-10-21 00:32:14 +00:00
|
|
|
/// Returns information used to cancel pending queries.
|
|
|
|
///
|
|
|
|
/// Used with the `cancel_query` function. The object returned can be used
|
|
|
|
/// to cancel any query executed by the connection it was created from.
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn cancel_data(&self) -> PostgresCancelData {
|
2014-03-19 04:00:06 +00:00
|
|
|
self.conn.borrow().cancel_data
|
2013-10-21 00:32:14 +00:00
|
|
|
}
|
|
|
|
|
2014-02-10 06:45:26 +00:00
|
|
|
/// Returns whether or not the stream has been desynchronized due to an
|
|
|
|
/// error in the communication channel with the server.
|
|
|
|
///
|
|
|
|
/// If this has occurred, all further queries will immediately return an
|
|
|
|
/// error.
|
|
|
|
pub fn is_desynchronized(&self) -> bool {
|
2014-03-19 04:00:06 +00:00
|
|
|
self.conn.borrow().is_desynchronized()
|
2014-02-10 06:45:26 +00:00
|
|
|
}
|
|
|
|
|
2014-02-10 07:55:16 +00:00
|
|
|
/// Consumes the connection, closing it.
|
|
|
|
///
|
2014-08-19 05:02:16 +00:00
|
|
|
/// Functionally equivalent to the `Drop` implementation for
|
|
|
|
/// `PostgresConnection` except that it returns any error encountered to
|
|
|
|
/// the caller.
|
|
|
|
pub fn finish(self) -> PostgresResult<()> {
|
2014-03-19 04:00:06 +00:00
|
|
|
let mut conn = self.conn.borrow_mut();
|
|
|
|
conn.finished = true;
|
|
|
|
conn.finish_inner()
|
2014-02-10 07:55:16 +00:00
|
|
|
}
|
|
|
|
|
2014-04-08 03:52:41 +00:00
|
|
|
fn canary(&self) -> u32 {
|
2014-04-10 04:28:20 +00:00
|
|
|
self.conn.borrow().canary()
|
2014-04-08 03:52:41 +00:00
|
|
|
}
|
|
|
|
|
2014-02-07 04:58:47 +00:00
|
|
|
fn write_messages(&self, messages: &[FrontendMessage]) -> IoResult<()> {
|
2014-03-19 04:00:06 +00:00
|
|
|
self.conn.borrow_mut().write_messages(messages)
|
2013-08-17 22:09:26 +00:00
|
|
|
}
|
|
|
|
}
|
2013-08-18 02:09:56 +00:00
|
|
|
|
2013-11-10 04:58:38 +00:00
|
|
|
/// Specifies the SSL support requested for a new connection
|
2013-11-11 02:13:32 +00:00
|
|
|
pub enum SslMode {
|
2013-11-10 04:58:38 +00:00
|
|
|
/// The connection will not use SSL
|
|
|
|
NoSsl,
|
|
|
|
/// The connection will use SSL if the backend supports it
|
2013-11-11 02:13:32 +00:00
|
|
|
PreferSsl(SslContext),
|
2013-11-10 04:58:38 +00:00
|
|
|
/// The connection must use SSL
|
2013-11-11 02:13:32 +00:00
|
|
|
RequireSsl(SslContext)
|
2013-11-10 04:58:38 +00:00
|
|
|
}
|
|
|
|
|
2014-05-19 02:46:21 +00:00
|
|
|
/// Represents a transaction on a database connection.
|
|
|
|
///
|
2014-07-26 05:41:10 +00:00
|
|
|
/// The transaction will roll back by default.
|
2013-11-24 22:42:44 +00:00
|
|
|
pub struct PostgresTransaction<'conn> {
|
2014-08-19 05:02:16 +00:00
|
|
|
conn: &'conn PostgresConnection,
|
2014-04-01 06:51:42 +00:00
|
|
|
commit: Cell<bool>,
|
2014-05-19 02:34:01 +00:00
|
|
|
depth: u32,
|
2014-04-01 06:51:42 +00:00
|
|
|
finished: bool,
|
2013-09-16 05:35:30 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#[unsafe_destructor]
|
2013-11-24 22:42:44 +00:00
|
|
|
impl<'conn> Drop for PostgresTransaction<'conn> {
|
2013-09-18 05:06:47 +00:00
|
|
|
fn drop(&mut self) {
|
2014-02-10 07:55:16 +00:00
|
|
|
if !self.finished {
|
2014-04-07 06:37:17 +00:00
|
|
|
let _ = self.finish_inner();
|
2014-02-10 07:55:16 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl<'conn> PostgresTransaction<'conn> {
|
2014-08-19 05:02:16 +00:00
|
|
|
fn finish_inner(&mut self) -> PostgresResult<()> {
|
2014-09-13 05:07:10 +00:00
|
|
|
let mut conn = self.conn.conn.borrow_mut();
|
|
|
|
debug_assert!(self.depth == conn.trans_depth);
|
2014-07-26 05:41:10 +00:00
|
|
|
let query = match (self.commit.get(), self.depth != 1) {
|
|
|
|
(false, true) => "ROLLBACK TO sp",
|
|
|
|
(false, false) => "ROLLBACK",
|
|
|
|
(true, true) => "RELEASE sp",
|
|
|
|
(true, false) => "COMMIT",
|
2014-05-18 18:37:52 +00:00
|
|
|
};
|
2014-09-13 05:07:10 +00:00
|
|
|
conn.trans_depth -= 1;
|
|
|
|
conn.quick_query(query).map(|_| ())
|
2013-09-16 05:35:30 +00:00
|
|
|
}
|
2013-08-27 05:40:23 +00:00
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
/// Like `PostgresConnection::prepare`.
|
|
|
|
pub fn prepare<'a>(&'a self, query: &str) -> PostgresResult<PostgresStatement<'a>> {
|
2014-09-13 05:07:10 +00:00
|
|
|
let mut conn = self.conn.conn.borrow_mut();
|
|
|
|
if conn.trans_depth != self.depth {
|
2014-05-19 02:34:01 +00:00
|
|
|
return Err(PgWrongTransaction);
|
|
|
|
}
|
2014-09-13 05:07:10 +00:00
|
|
|
conn.prepare(query, self.conn)
|
2013-09-01 18:06:33 +00:00
|
|
|
}
|
|
|
|
|
2014-09-30 06:49:58 +00:00
|
|
|
/// Like `PostgresConnection::prepare_copy_in`.
|
|
|
|
pub fn prepare_copy_in<'a>(&'a self, table: &str, cols: &[&str])
|
|
|
|
-> PostgresResult<PostgresCopyInStatement<'a>> {
|
|
|
|
let mut conn = self.conn.conn.borrow_mut();
|
|
|
|
if conn.trans_depth != self.depth {
|
|
|
|
return Err(PgWrongTransaction);
|
|
|
|
}
|
|
|
|
conn.prepare_copy_in(table, cols, self.conn)
|
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
/// Like `PostgresConnection::execute`.
|
|
|
|
pub fn execute(&self, query: &str, params: &[&ToSql]) -> PostgresResult<uint> {
|
2014-05-19 02:34:01 +00:00
|
|
|
self.prepare(query).and_then(|s| s.execute(params))
|
2013-09-30 02:12:20 +00:00
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
/// Like `PostgresConnection::batch_execute`.
|
|
|
|
pub fn batch_execute(&self, query: &str) -> PostgresResult<()> {
|
2014-07-30 02:48:56 +00:00
|
|
|
let mut conn = self.conn.conn.borrow_mut();
|
|
|
|
if conn.trans_depth != self.depth {
|
2014-06-08 23:07:15 +00:00
|
|
|
return Err(PgWrongTransaction);
|
|
|
|
}
|
2014-07-30 02:48:56 +00:00
|
|
|
conn.quick_query(query).map(|_| ())
|
2014-06-08 23:07:15 +00:00
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
/// Like `PostgresConnection::transaction`.
|
|
|
|
pub fn transaction<'a>(&'a self) -> PostgresResult<PostgresTransaction<'a>> {
|
2014-09-13 05:07:10 +00:00
|
|
|
let mut conn = self.conn.conn.borrow_mut();
|
|
|
|
check_desync!(conn);
|
|
|
|
if conn.trans_depth != self.depth {
|
2014-05-19 02:34:01 +00:00
|
|
|
return Err(PgWrongTransaction);
|
|
|
|
}
|
2014-09-13 05:07:10 +00:00
|
|
|
try!(conn.quick_query("SAVEPOINT sp"));
|
|
|
|
conn.trans_depth += 1;
|
2014-02-10 06:45:26 +00:00
|
|
|
Ok(PostgresTransaction {
|
2013-09-05 06:28:44 +00:00
|
|
|
conn: self.conn,
|
2014-07-26 05:41:10 +00:00
|
|
|
commit: Cell::new(false),
|
2014-05-19 02:34:01 +00:00
|
|
|
depth: self.depth + 1,
|
2014-02-10 07:55:16 +00:00
|
|
|
finished: false,
|
2014-02-10 06:45:26 +00:00
|
|
|
})
|
|
|
|
}
|
|
|
|
|
2014-07-30 02:50:44 +00:00
|
|
|
/// Executes a prepared statement, returning a lazily loaded iterator over
|
|
|
|
/// the resulting rows.
|
|
|
|
///
|
|
|
|
/// No more than `row_limit` rows will be stored in memory at a time. Rows
|
|
|
|
/// will be pulled from the database in batches of `row_limit` as needed.
|
|
|
|
/// If `row_limit` is less than or equal to 0, `lazy_query` is equivalent
|
|
|
|
/// to `query`.
|
|
|
|
pub fn lazy_query<'trans, 'stmt>(&'trans self,
|
2014-08-19 05:02:16 +00:00
|
|
|
stmt: &'stmt PostgresStatement,
|
2014-07-30 02:50:44 +00:00
|
|
|
params: &[&ToSql],
|
|
|
|
row_limit: i32)
|
2014-08-19 05:02:16 +00:00
|
|
|
-> PostgresResult<PostgresLazyRows<'trans, 'stmt>> {
|
2014-07-30 02:50:44 +00:00
|
|
|
if self.conn as *const _ != stmt.conn as *const _ {
|
|
|
|
return Err(PgWrongConnection);
|
|
|
|
}
|
|
|
|
check_desync!(self.conn);
|
|
|
|
stmt.lazy_query(row_limit, params).map(|result| {
|
2014-08-19 05:02:16 +00:00
|
|
|
PostgresLazyRows {
|
2014-07-30 02:50:44 +00:00
|
|
|
_trans: self,
|
|
|
|
result: result
|
|
|
|
}
|
|
|
|
})
|
|
|
|
}
|
|
|
|
|
2013-09-30 02:12:20 +00:00
|
|
|
/// Determines if the transaction is currently set to commit or roll back.
|
2013-08-27 05:40:23 +00:00
|
|
|
pub fn will_commit(&self) -> bool {
|
2014-02-10 06:45:26 +00:00
|
|
|
self.commit.get()
|
2013-08-27 05:40:23 +00:00
|
|
|
}
|
|
|
|
|
2013-09-30 02:12:20 +00:00
|
|
|
/// Sets the transaction to commit at its completion.
|
2013-08-27 05:40:23 +00:00
|
|
|
pub fn set_commit(&self) {
|
2014-02-10 06:45:26 +00:00
|
|
|
self.commit.set(true);
|
2013-08-27 05:40:23 +00:00
|
|
|
}
|
|
|
|
|
2013-09-30 02:12:20 +00:00
|
|
|
/// Sets the transaction to roll back at its completion.
|
2013-08-27 05:40:23 +00:00
|
|
|
pub fn set_rollback(&self) {
|
2014-02-10 06:45:26 +00:00
|
|
|
self.commit.set(false);
|
2013-08-27 05:40:23 +00:00
|
|
|
}
|
2014-02-10 07:55:16 +00:00
|
|
|
|
2014-07-26 05:41:10 +00:00
|
|
|
/// A convenience method which consumes and commits a transaction.
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn commit(self) -> PostgresResult<()> {
|
2014-07-26 05:41:10 +00:00
|
|
|
self.set_commit();
|
|
|
|
self.finish()
|
|
|
|
}
|
|
|
|
|
2014-02-10 07:55:16 +00:00
|
|
|
/// Consumes the transaction, commiting or rolling it back as appropriate.
|
|
|
|
///
|
|
|
|
/// Functionally equivalent to the `Drop` implementation of
|
|
|
|
/// `PostgresTransaction` except that it returns any error to the caller.
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn finish(mut self) -> PostgresResult<()> {
|
2014-02-10 07:55:16 +00:00
|
|
|
self.finished = true;
|
|
|
|
self.finish_inner()
|
|
|
|
}
|
2013-08-27 05:40:23 +00:00
|
|
|
}
|
|
|
|
|
2014-03-26 04:01:38 +00:00
|
|
|
/// A prepared statement
|
2014-08-19 05:02:16 +00:00
|
|
|
pub struct PostgresStatement<'conn> {
|
|
|
|
conn: &'conn PostgresConnection,
|
2014-05-26 03:38:40 +00:00
|
|
|
name: String,
|
2014-04-01 06:51:42 +00:00
|
|
|
param_types: Vec<PostgresType>,
|
|
|
|
result_desc: Vec<ResultDescription>,
|
|
|
|
next_portal_id: Cell<uint>,
|
2014-04-26 06:14:55 +00:00
|
|
|
finished: bool,
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#[unsafe_destructor]
|
2014-08-19 05:02:16 +00:00
|
|
|
impl<'conn> Drop for PostgresStatement<'conn> {
|
2014-03-26 04:01:38 +00:00
|
|
|
fn drop(&mut self) {
|
2014-04-26 06:14:55 +00:00
|
|
|
if !self.finished {
|
2014-04-07 06:37:17 +00:00
|
|
|
let _ = self.finish_inner();
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl<'conn> PostgresStatement<'conn> {
|
|
|
|
fn finish_inner(&mut self) -> PostgresResult<()> {
|
2014-09-30 05:56:43 +00:00
|
|
|
let mut conn = self.conn.conn.borrow_mut();
|
|
|
|
check_desync!(conn);
|
2014-10-05 03:08:44 +00:00
|
|
|
conn.close_statement(self.name[])
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
2014-06-07 23:01:50 +00:00
|
|
|
fn inner_execute(&self, portal_name: &str, row_limit: i32, params: &[&ToSql])
|
2014-08-19 05:02:16 +00:00
|
|
|
-> PostgresResult<()> {
|
2014-09-13 05:07:10 +00:00
|
|
|
let mut conn = self.conn.conn.borrow_mut();
|
2014-03-28 04:39:03 +00:00
|
|
|
if self.param_types.len() != params.len() {
|
|
|
|
return Err(PgWrongParamCount {
|
|
|
|
expected: self.param_types.len(),
|
|
|
|
actual: params.len(),
|
|
|
|
});
|
|
|
|
}
|
2014-05-26 18:41:18 +00:00
|
|
|
let mut values = vec![];
|
2014-06-19 06:56:57 +00:00
|
|
|
for (param, ty) in params.iter().zip(self.param_types.iter()) {
|
2014-09-30 06:41:13 +00:00
|
|
|
let value = try!(param.to_sql(ty));
|
2014-03-26 04:01:38 +00:00
|
|
|
values.push(value);
|
|
|
|
};
|
|
|
|
|
2014-09-13 05:07:10 +00:00
|
|
|
try_pg!(conn.write_messages([
|
2014-03-26 04:01:38 +00:00
|
|
|
Bind {
|
|
|
|
portal: portal_name,
|
2014-10-05 03:08:44 +00:00
|
|
|
statement: self.name[],
|
2014-09-30 06:41:13 +00:00
|
|
|
formats: [1],
|
2014-10-05 03:08:44 +00:00
|
|
|
values: values[],
|
2014-09-30 06:41:13 +00:00
|
|
|
result_formats: [1]
|
2014-03-26 04:01:38 +00:00
|
|
|
},
|
|
|
|
Execute {
|
|
|
|
portal: portal_name,
|
2014-06-07 07:14:08 +00:00
|
|
|
max_rows: row_limit
|
2014-03-26 04:01:38 +00:00
|
|
|
},
|
|
|
|
Sync]));
|
|
|
|
|
2014-09-27 20:55:47 +00:00
|
|
|
match try_pg!(conn.read_message_()) {
|
2014-03-26 04:01:38 +00:00
|
|
|
BindComplete => Ok(()),
|
|
|
|
ErrorResponse { fields } => {
|
2014-09-30 00:43:21 +00:00
|
|
|
try!(conn.wait_for_ready());
|
2014-10-01 05:52:27 +00:00
|
|
|
PostgresDbError::new(fields)
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
2014-07-07 02:02:22 +00:00
|
|
|
_ => {
|
2014-09-13 05:07:10 +00:00
|
|
|
conn.desynchronized = true;
|
2014-09-30 04:05:42 +00:00
|
|
|
Err(PgBadResponse)
|
2014-07-07 02:02:22 +00:00
|
|
|
}
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-06-07 23:01:50 +00:00
|
|
|
fn lazy_query<'a>(&'a self, row_limit: i32, params: &[&ToSql])
|
2014-08-19 05:02:16 +00:00
|
|
|
-> PostgresResult<PostgresRows<'a>> {
|
2014-03-26 04:01:38 +00:00
|
|
|
let id = self.next_portal_id.get();
|
|
|
|
self.next_portal_id.set(id + 1);
|
2014-05-24 03:08:14 +00:00
|
|
|
let portal_name = format!("{}p{}", self.name, id);
|
2014-03-26 04:01:38 +00:00
|
|
|
|
2014-10-05 03:08:44 +00:00
|
|
|
try!(self.inner_execute(portal_name[], row_limit, params));
|
2014-03-26 04:01:38 +00:00
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
let mut result = PostgresRows {
|
2014-03-26 04:01:38 +00:00
|
|
|
stmt: self,
|
|
|
|
name: portal_name,
|
|
|
|
data: RingBuf::new(),
|
|
|
|
row_limit: row_limit,
|
|
|
|
more_rows: true,
|
|
|
|
finished: false,
|
|
|
|
};
|
|
|
|
try!(result.read_rows())
|
|
|
|
|
|
|
|
Ok(result)
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Returns a slice containing the expected parameter types.
|
2014-07-22 05:46:40 +00:00
|
|
|
pub fn param_types(&self) -> &[PostgresType] {
|
2014-10-05 03:08:44 +00:00
|
|
|
self.param_types[]
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/// Returns a slice describing the columns of the result of the query.
|
2014-07-22 05:46:40 +00:00
|
|
|
pub fn result_descriptions(&self) -> &[ResultDescription] {
|
2014-10-05 03:08:44 +00:00
|
|
|
self.result_desc[]
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
2014-03-28 04:08:22 +00:00
|
|
|
/// Executes the prepared statement, returning the number of rows modified.
|
2014-03-26 04:01:38 +00:00
|
|
|
///
|
|
|
|
/// If the statement does not modify any rows (e.g. SELECT), 0 is returned.
|
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Example
|
2014-03-26 04:01:38 +00:00
|
|
|
///
|
|
|
|
/// ```rust,no_run
|
2014-08-19 05:02:16 +00:00
|
|
|
/// # use postgres::{PostgresConnection, NoSsl};
|
|
|
|
/// # let conn = PostgresConnection::connect("", &NoSsl).unwrap();
|
2014-03-26 04:01:38 +00:00
|
|
|
/// # let bar = 1i32;
|
|
|
|
/// # let baz = true;
|
2014-03-28 04:08:22 +00:00
|
|
|
/// let stmt = conn.prepare("UPDATE foo SET bar = $1 WHERE baz = $2").unwrap();
|
2014-08-30 09:57:46 +00:00
|
|
|
/// match stmt.execute(&[&bar, &baz]) {
|
2014-03-26 04:01:38 +00:00
|
|
|
/// Ok(count) => println!("{} row(s) updated", count),
|
|
|
|
/// Err(err) => println!("Error executing query: {}", err)
|
|
|
|
/// }
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn execute(&self, params: &[&ToSql]) -> PostgresResult<uint> {
|
2014-03-26 04:01:38 +00:00
|
|
|
check_desync!(self.conn);
|
|
|
|
try!(self.inner_execute("", 0, params));
|
|
|
|
|
2014-09-13 05:07:10 +00:00
|
|
|
let mut conn = self.conn.conn.borrow_mut();
|
2014-03-26 04:01:38 +00:00
|
|
|
let num;
|
|
|
|
loop {
|
2014-09-27 20:55:47 +00:00
|
|
|
match try_pg!(conn.read_message_()) {
|
2014-03-26 04:01:38 +00:00
|
|
|
DataRow { .. } => {}
|
|
|
|
ErrorResponse { fields } => {
|
2014-09-13 05:07:10 +00:00
|
|
|
try!(conn.wait_for_ready());
|
2014-10-01 05:52:27 +00:00
|
|
|
return PostgresDbError::new(fields);
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
CommandComplete { tag } => {
|
2014-09-30 07:11:23 +00:00
|
|
|
num = util::parse_update_count(tag);
|
2014-03-26 04:01:38 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
EmptyQueryResponse => {
|
|
|
|
num = 0;
|
|
|
|
break;
|
|
|
|
}
|
2014-09-30 04:05:42 +00:00
|
|
|
CopyInResponse { .. } => {
|
|
|
|
try_pg!(conn.write_messages([
|
|
|
|
CopyFail {
|
|
|
|
message: "COPY queries cannot be directly executed",
|
|
|
|
},
|
|
|
|
Sync]));
|
|
|
|
}
|
2014-07-07 02:02:22 +00:00
|
|
|
_ => {
|
2014-09-13 05:07:10 +00:00
|
|
|
conn.desynchronized = true;
|
2014-07-07 02:02:22 +00:00
|
|
|
return Err(PgBadResponse);
|
|
|
|
}
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
}
|
2014-09-13 05:07:10 +00:00
|
|
|
try!(conn.wait_for_ready());
|
2014-03-26 04:01:38 +00:00
|
|
|
|
|
|
|
Ok(num)
|
|
|
|
}
|
|
|
|
|
2014-03-28 04:08:22 +00:00
|
|
|
/// Executes the prepared statement, returning an iterator over the
|
|
|
|
/// resulting rows.
|
2014-03-26 04:01:38 +00:00
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Example
|
2014-03-26 04:01:38 +00:00
|
|
|
///
|
|
|
|
/// ```rust,no_run
|
2014-08-19 05:02:16 +00:00
|
|
|
/// # use postgres::{PostgresConnection, NoSsl};
|
|
|
|
/// # let conn = PostgresConnection::connect("", &NoSsl).unwrap();
|
2014-03-28 04:08:22 +00:00
|
|
|
/// let stmt = conn.prepare("SELECT foo FROM bar WHERE baz = $1").unwrap();
|
2014-03-26 04:01:38 +00:00
|
|
|
/// # let baz = true;
|
2014-08-30 09:57:46 +00:00
|
|
|
/// let mut rows = match stmt.query(&[&baz]) {
|
2014-03-26 04:01:38 +00:00
|
|
|
/// Ok(rows) => rows,
|
|
|
|
/// Err(err) => fail!("Error running query: {}", err)
|
|
|
|
/// };
|
|
|
|
/// for row in rows {
|
2014-07-10 19:35:57 +00:00
|
|
|
/// let foo: i32 = row.get("foo");
|
2014-03-26 04:01:38 +00:00
|
|
|
/// println!("foo: {}", foo);
|
|
|
|
/// }
|
|
|
|
/// ```
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn query<'a>(&'a self, params: &[&ToSql]) -> PostgresResult<PostgresRows<'a>> {
|
2014-03-26 04:01:38 +00:00
|
|
|
check_desync!(self.conn);
|
2014-03-28 04:08:22 +00:00
|
|
|
self.lazy_query(0, params)
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/// Consumes the statement, clearing it from the Postgres session.
|
|
|
|
///
|
2014-08-19 05:02:16 +00:00
|
|
|
/// Functionally identical to the `Drop` implementation of the
|
|
|
|
/// `PostgresStatement` except that it returns any error to the caller.
|
|
|
|
pub fn finish(mut self) -> PostgresResult<()> {
|
2014-04-26 06:14:55 +00:00
|
|
|
self.finished = true;
|
2014-03-26 04:01:38 +00:00
|
|
|
self.finish_inner()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Information about a column of the result of a query.
|
2014-06-02 02:57:27 +00:00
|
|
|
#[deriving(PartialEq, Eq)]
|
2014-03-26 04:01:38 +00:00
|
|
|
pub struct ResultDescription {
|
|
|
|
/// The name of the column
|
2014-05-26 03:38:40 +00:00
|
|
|
pub name: String,
|
2014-03-26 04:01:38 +00:00
|
|
|
/// The type of the data in the column
|
2014-04-20 21:38:11 +00:00
|
|
|
pub ty: PostgresType
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/// An iterator over the resulting rows of a query.
|
2014-08-19 05:02:16 +00:00
|
|
|
pub struct PostgresRows<'stmt> {
|
|
|
|
stmt: &'stmt PostgresStatement<'stmt>,
|
2014-05-26 03:38:40 +00:00
|
|
|
name: String,
|
2014-04-08 03:02:05 +00:00
|
|
|
data: RingBuf<Vec<Option<Vec<u8>>>>,
|
2014-06-07 23:01:50 +00:00
|
|
|
row_limit: i32,
|
2014-04-01 06:51:42 +00:00
|
|
|
more_rows: bool,
|
|
|
|
finished: bool,
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#[unsafe_destructor]
|
2014-08-19 05:02:16 +00:00
|
|
|
impl<'stmt> Drop for PostgresRows<'stmt> {
|
2014-03-26 04:01:38 +00:00
|
|
|
fn drop(&mut self) {
|
|
|
|
if !self.finished {
|
2014-04-07 06:37:17 +00:00
|
|
|
let _ = self.finish_inner();
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl<'stmt> PostgresRows<'stmt> {
|
|
|
|
fn finish_inner(&mut self) -> PostgresResult<()> {
|
2014-09-13 05:07:10 +00:00
|
|
|
let mut conn = self.stmt.conn.conn.borrow_mut();
|
|
|
|
check_desync!(conn);
|
|
|
|
try_pg!(conn.write_messages([
|
2014-03-26 04:01:38 +00:00
|
|
|
Close {
|
2014-09-06 23:33:43 +00:00
|
|
|
variant: b'P',
|
2014-10-05 03:08:44 +00:00
|
|
|
name: self.name[]
|
2014-03-26 04:01:38 +00:00
|
|
|
},
|
|
|
|
Sync]));
|
2014-09-13 05:07:10 +00:00
|
|
|
|
2014-03-26 04:01:38 +00:00
|
|
|
loop {
|
2014-09-27 20:55:47 +00:00
|
|
|
match try_pg!(conn.read_message_()) {
|
2014-03-26 04:01:38 +00:00
|
|
|
ReadyForQuery { .. } => break,
|
|
|
|
ErrorResponse { fields } => {
|
2014-09-13 05:07:10 +00:00
|
|
|
try!(conn.wait_for_ready());
|
2014-10-01 05:52:27 +00:00
|
|
|
return PostgresDbError::new(fields);
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
_ => {}
|
|
|
|
}
|
|
|
|
}
|
2014-09-13 05:07:10 +00:00
|
|
|
|
2014-03-26 04:01:38 +00:00
|
|
|
Ok(())
|
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
fn read_rows(&mut self) -> PostgresResult<()> {
|
2014-09-13 05:07:10 +00:00
|
|
|
let mut conn = self.stmt.conn.conn.borrow_mut();
|
2014-03-26 04:01:38 +00:00
|
|
|
loop {
|
2014-09-27 20:55:47 +00:00
|
|
|
match try_pg!(conn.read_message_()) {
|
2014-08-16 02:50:11 +00:00
|
|
|
EmptyQueryResponse | CommandComplete { .. } => {
|
2014-03-26 04:01:38 +00:00
|
|
|
self.more_rows = false;
|
|
|
|
break;
|
|
|
|
},
|
|
|
|
PortalSuspended => {
|
|
|
|
self.more_rows = true;
|
|
|
|
break;
|
|
|
|
},
|
2014-07-25 23:09:34 +00:00
|
|
|
DataRow { row } => self.data.push(row),
|
2014-07-25 01:00:28 +00:00
|
|
|
ErrorResponse { fields } => {
|
2014-09-13 05:07:10 +00:00
|
|
|
try!(conn.wait_for_ready());
|
2014-10-01 05:52:27 +00:00
|
|
|
return PostgresDbError::new(fields);
|
2014-07-25 01:00:28 +00:00
|
|
|
}
|
2014-09-30 04:05:42 +00:00
|
|
|
CopyInResponse { .. } => {
|
|
|
|
try_pg!(conn.write_messages([
|
|
|
|
CopyFail {
|
|
|
|
message: "COPY queries cannot be directly executed",
|
|
|
|
},
|
|
|
|
Sync]));
|
|
|
|
}
|
2014-07-07 02:02:22 +00:00
|
|
|
_ => {
|
2014-09-13 05:07:10 +00:00
|
|
|
conn.desynchronized = true;
|
2014-07-07 02:02:22 +00:00
|
|
|
return Err(PgBadResponse);
|
|
|
|
}
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
}
|
2014-09-13 05:07:10 +00:00
|
|
|
conn.wait_for_ready()
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
fn execute(&mut self) -> PostgresResult<()> {
|
2014-03-26 04:01:38 +00:00
|
|
|
try_pg!(self.stmt.conn.write_messages([
|
|
|
|
Execute {
|
2014-10-05 03:08:44 +00:00
|
|
|
portal: self.name[],
|
2014-06-07 07:14:08 +00:00
|
|
|
max_rows: self.row_limit
|
2014-03-26 04:01:38 +00:00
|
|
|
},
|
|
|
|
Sync]));
|
|
|
|
self.read_rows()
|
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
/// Consumes the `PostgresRows`, cleaning up associated state.
|
2014-03-26 04:01:38 +00:00
|
|
|
///
|
2014-08-19 05:02:16 +00:00
|
|
|
/// Functionally identical to the `Drop` implementation on `PostgresRows`
|
|
|
|
/// except that it returns any error to the caller.
|
|
|
|
pub fn finish(mut self) -> PostgresResult<()> {
|
2014-03-26 04:01:38 +00:00
|
|
|
self.finished = true;
|
|
|
|
self.finish_inner()
|
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
fn try_next(&mut self) -> Option<PostgresResult<PostgresRow<'stmt>>> {
|
2014-03-26 04:01:38 +00:00
|
|
|
if self.data.is_empty() && self.more_rows {
|
2014-03-28 04:20:04 +00:00
|
|
|
match self.execute() {
|
|
|
|
Ok(()) => {}
|
|
|
|
Err(err) => return Some(Err(err))
|
|
|
|
}
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
2014-03-28 04:20:04 +00:00
|
|
|
self.data.pop_front().map(|row| {
|
2014-08-19 05:02:16 +00:00
|
|
|
Ok(PostgresRow {
|
2014-03-26 04:01:38 +00:00
|
|
|
stmt: self.stmt,
|
|
|
|
data: row
|
2014-03-28 04:20:04 +00:00
|
|
|
})
|
|
|
|
})
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl<'stmt> Iterator<PostgresRow<'stmt>> for PostgresRows<'stmt> {
|
2014-04-03 05:56:16 +00:00
|
|
|
#[inline]
|
2014-08-19 05:02:16 +00:00
|
|
|
fn next(&mut self) -> Option<PostgresRow<'stmt>> {
|
2014-03-28 04:20:04 +00:00
|
|
|
// we'll never hit the network on a non-lazy result
|
|
|
|
self.try_next().map(|r| r.unwrap())
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
2014-04-03 05:56:16 +00:00
|
|
|
#[inline]
|
2014-03-26 04:01:38 +00:00
|
|
|
fn size_hint(&self) -> (uint, Option<uint>) {
|
|
|
|
let lower = self.data.len();
|
|
|
|
let upper = if self.more_rows {
|
|
|
|
None
|
|
|
|
} else {
|
|
|
|
Some(lower)
|
|
|
|
};
|
|
|
|
(lower, upper)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// A single result row of a query.
|
2014-08-19 05:02:16 +00:00
|
|
|
pub struct PostgresRow<'stmt> {
|
|
|
|
stmt: &'stmt PostgresStatement<'stmt>,
|
2014-04-08 03:02:05 +00:00
|
|
|
data: Vec<Option<Vec<u8>>>
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl<'stmt> PostgresRow<'stmt> {
|
2014-03-30 00:01:41 +00:00
|
|
|
/// Retrieves the contents of a field of the row.
|
|
|
|
///
|
|
|
|
/// A field can be accessed by the name or index of its column, though
|
2014-06-30 06:05:26 +00:00
|
|
|
/// access by index is more efficient. Rows are 0-indexed.
|
2014-03-30 00:01:41 +00:00
|
|
|
///
|
|
|
|
/// Returns an `Error` value if the index does not reference a column or
|
|
|
|
/// the return type is not compatible with the Postgres type.
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn get_opt<I, T>(&self, idx: I) -> PostgresResult<T> where I: RowIndex, T: FromSql {
|
2014-03-30 00:01:41 +00:00
|
|
|
let idx = match idx.idx(self.stmt) {
|
|
|
|
Some(idx) => idx,
|
|
|
|
None => return Err(PgInvalidColumn)
|
|
|
|
};
|
2014-08-17 20:57:58 +00:00
|
|
|
FromSql::from_sql(&self.stmt.result_desc[idx].ty, &self.data[idx])
|
2014-03-30 00:01:41 +00:00
|
|
|
}
|
2014-03-26 04:01:38 +00:00
|
|
|
|
2014-07-10 19:35:57 +00:00
|
|
|
/// Retrieves the contents of a field of the row.
|
2014-03-30 00:01:41 +00:00
|
|
|
///
|
|
|
|
/// A field can be accessed by the name or index of its column, though
|
2014-06-30 05:53:03 +00:00
|
|
|
/// access by index is more efficient. Rows are 0-indexed.
|
2014-03-30 00:01:41 +00:00
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Failure
|
2014-03-30 00:01:41 +00:00
|
|
|
///
|
|
|
|
/// Fails if the index does not reference a column or the return type is
|
|
|
|
/// not compatible with the Postgres type.
|
|
|
|
///
|
2014-07-30 02:48:56 +00:00
|
|
|
/// ## Example
|
2014-03-30 00:01:41 +00:00
|
|
|
///
|
|
|
|
/// ```rust,no_run
|
2014-08-19 05:02:16 +00:00
|
|
|
/// # use postgres::{PostgresConnection, NoSsl};
|
|
|
|
/// # let conn = PostgresConnection::connect("", &NoSsl).unwrap();
|
2014-03-30 00:01:41 +00:00
|
|
|
/// # let stmt = conn.prepare("").unwrap();
|
|
|
|
/// # let mut result = stmt.query([]).unwrap();
|
|
|
|
/// # let row = result.next().unwrap();
|
2014-07-10 19:35:57 +00:00
|
|
|
/// let foo: i32 = row.get(0u);
|
|
|
|
/// let bar: String = row.get("bar");
|
2014-03-30 00:01:41 +00:00
|
|
|
/// ```
|
2014-08-17 20:57:58 +00:00
|
|
|
pub fn get<I, T>(&self, idx: I) -> T where I: RowIndex + fmt::Show + Clone, T: FromSql {
|
2014-07-10 19:35:57 +00:00
|
|
|
match self.get_opt(idx.clone()) {
|
2014-03-30 00:01:41 +00:00
|
|
|
Ok(ok) => ok,
|
2014-04-02 16:19:38 +00:00
|
|
|
Err(err) => fail!("error retrieving column {}: {}", idx, err)
|
2014-03-30 00:01:41 +00:00
|
|
|
}
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl<'stmt> Collection for PostgresRow<'stmt> {
|
2014-07-10 19:35:57 +00:00
|
|
|
#[inline]
|
|
|
|
fn len(&self) -> uint {
|
|
|
|
self.data.len()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-26 04:01:38 +00:00
|
|
|
/// A trait implemented by types that can index into columns of a row.
|
2014-03-31 02:21:51 +00:00
|
|
|
pub trait RowIndex {
|
2014-03-30 00:01:41 +00:00
|
|
|
/// Returns the index of the appropriate column, or `None` if no such
|
|
|
|
/// column exists.
|
2014-08-19 05:02:16 +00:00
|
|
|
fn idx(&self, stmt: &PostgresStatement) -> Option<uint>;
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
impl RowIndex for uint {
|
|
|
|
#[inline]
|
2014-08-19 05:02:16 +00:00
|
|
|
fn idx(&self, stmt: &PostgresStatement) -> Option<uint> {
|
2014-06-30 05:53:03 +00:00
|
|
|
if *self > stmt.result_desc.len() {
|
2014-03-30 00:01:41 +00:00
|
|
|
None
|
|
|
|
} else {
|
2014-06-30 05:53:03 +00:00
|
|
|
Some(*self)
|
2014-03-30 00:01:41 +00:00
|
|
|
}
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl<'a> RowIndex for &'a str {
|
2014-05-18 18:37:52 +00:00
|
|
|
#[inline]
|
2014-08-19 05:02:16 +00:00
|
|
|
fn idx(&self, stmt: &PostgresStatement) -> Option<uint> {
|
2014-10-05 03:08:44 +00:00
|
|
|
stmt.result_descriptions().iter().position(|d| d.name[] == *self)
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// A lazily-loaded iterator over the resulting rows of a query
|
2014-08-19 05:02:16 +00:00
|
|
|
pub struct PostgresLazyRows<'trans, 'stmt> {
|
|
|
|
result: PostgresRows<'stmt>,
|
2014-06-12 04:05:24 +00:00
|
|
|
_trans: &'trans PostgresTransaction<'trans>,
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl<'trans, 'stmt> PostgresLazyRows<'trans, 'stmt> {
|
|
|
|
/// Like `PostgresRows::finish`.
|
2014-04-03 05:56:16 +00:00
|
|
|
#[inline]
|
2014-08-19 05:02:16 +00:00
|
|
|
pub fn finish(self) -> PostgresResult<()> {
|
2014-03-26 04:01:38 +00:00
|
|
|
self.result.finish()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-08-19 05:02:16 +00:00
|
|
|
impl<'trans, 'stmt> Iterator<PostgresResult<PostgresRow<'stmt>>>
|
|
|
|
for PostgresLazyRows<'trans, 'stmt> {
|
2014-04-03 05:56:16 +00:00
|
|
|
#[inline]
|
2014-08-19 05:02:16 +00:00
|
|
|
fn next(&mut self) -> Option<PostgresResult<PostgresRow<'stmt>>> {
|
2014-03-28 04:20:04 +00:00
|
|
|
self.result.try_next()
|
2014-03-26 04:01:38 +00:00
|
|
|
}
|
|
|
|
|
2014-04-03 05:56:16 +00:00
|
|
|
#[inline]
|
2014-03-26 04:01:38 +00:00
|
|
|
fn size_hint(&self) -> (uint, Option<uint>) {
|
|
|
|
self.result.size_hint()
|
|
|
|
}
|
|
|
|
}
|
2014-09-30 05:56:43 +00:00
|
|
|
|
2014-09-30 07:11:23 +00:00
|
|
|
/// A prepared COPY FROM STDIN statement
|
2014-09-30 05:56:43 +00:00
|
|
|
pub struct PostgresCopyInStatement<'a> {
|
|
|
|
conn: &'a PostgresConnection,
|
|
|
|
name: String,
|
|
|
|
column_types: Vec<PostgresType>,
|
|
|
|
finished: bool,
|
|
|
|
}
|
|
|
|
|
|
|
|
#[unsafe_destructor]
|
|
|
|
impl<'a> Drop for PostgresCopyInStatement<'a> {
|
|
|
|
fn drop(&mut self) {
|
|
|
|
if !self.finished {
|
|
|
|
let _ = self.finish_inner();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl<'a> PostgresCopyInStatement<'a> {
|
|
|
|
fn finish_inner(&mut self) -> PostgresResult<()> {
|
|
|
|
let mut conn = self.conn.conn.borrow_mut();
|
|
|
|
check_desync!(conn);
|
2014-10-05 03:08:44 +00:00
|
|
|
conn.close_statement(self.name[])
|
2014-09-30 05:56:43 +00:00
|
|
|
}
|
|
|
|
|
2014-09-30 07:15:17 +00:00
|
|
|
/// Returns a slice containing the expected column types.
|
|
|
|
pub fn column_types(&self) -> &[PostgresType] {
|
2014-10-05 03:08:44 +00:00
|
|
|
self.column_types[]
|
2014-09-30 07:15:17 +00:00
|
|
|
}
|
|
|
|
|
2014-09-30 07:11:23 +00:00
|
|
|
/// Executes the prepared statement.
|
|
|
|
///
|
|
|
|
/// Each iterator retuned by the `rows` iterator will be interpreted as
|
|
|
|
/// providing a single result row.
|
|
|
|
///
|
|
|
|
/// Returns the number of rows copied.
|
|
|
|
pub fn execute<'b, I, J>(&self, mut rows: I) -> PostgresResult<uint>
|
2014-09-30 05:56:43 +00:00
|
|
|
where I: Iterator<J>, J: Iterator<&'b ToSql + 'b> {
|
|
|
|
let mut conn = self.conn.conn.borrow_mut();
|
|
|
|
|
|
|
|
try_pg!(conn.write_messages([
|
|
|
|
Bind {
|
|
|
|
portal: "",
|
2014-10-05 03:08:44 +00:00
|
|
|
statement: self.name[],
|
2014-09-30 05:56:43 +00:00
|
|
|
formats: [],
|
|
|
|
values: [],
|
|
|
|
result_formats: []
|
|
|
|
},
|
|
|
|
Execute {
|
|
|
|
portal: "",
|
|
|
|
max_rows: 0,
|
|
|
|
},
|
|
|
|
Sync]));
|
|
|
|
|
|
|
|
match try_pg!(conn.read_message_()) {
|
|
|
|
BindComplete => {},
|
|
|
|
ErrorResponse { fields } => {
|
|
|
|
try!(conn.wait_for_ready());
|
2014-10-01 05:52:27 +00:00
|
|
|
return PostgresDbError::new(fields);
|
2014-09-30 05:56:43 +00:00
|
|
|
}
|
|
|
|
_ => {
|
|
|
|
conn.desynchronized = true;
|
|
|
|
return Err(PgBadResponse);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
match try_pg!(conn.read_message_()) {
|
|
|
|
CopyInResponse { .. } => {}
|
|
|
|
_ => {
|
|
|
|
conn.desynchronized = true;
|
|
|
|
return Err(PgBadResponse);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
let mut buf = MemWriter::new();
|
|
|
|
let _ = buf.write(b"PGCOPY\n\xff\r\n\x00");
|
|
|
|
let _ = buf.write_be_i32(0);
|
|
|
|
let _ = buf.write_be_i32(0);
|
|
|
|
|
2014-10-01 21:40:43 +00:00
|
|
|
'l: for mut row in rows {
|
2014-09-30 05:56:43 +00:00
|
|
|
let _ = buf.write_be_i16(self.column_types.len() as i16);
|
|
|
|
|
2014-09-30 06:32:57 +00:00
|
|
|
let mut types = self.column_types.iter();
|
|
|
|
loop {
|
|
|
|
match (row.next(), types.next()) {
|
|
|
|
(Some(val), Some(ty)) => {
|
|
|
|
match try!(val.to_sql(ty)) {
|
2014-09-30 06:41:13 +00:00
|
|
|
None => {
|
2014-09-30 06:32:57 +00:00
|
|
|
let _ = buf.write_be_i32(-1);
|
|
|
|
}
|
2014-09-30 06:41:13 +00:00
|
|
|
Some(val) => {
|
2014-09-30 06:32:57 +00:00
|
|
|
let _ = buf.write_be_i32(val.len() as i32);
|
2014-10-05 03:08:44 +00:00
|
|
|
let _ = buf.write(val[]);
|
2014-09-30 06:32:57 +00:00
|
|
|
}
|
|
|
|
}
|
2014-09-30 05:56:43 +00:00
|
|
|
}
|
2014-09-30 06:32:57 +00:00
|
|
|
(Some(_), None) | (None, Some(_)) => {
|
2014-10-01 21:40:43 +00:00
|
|
|
try_pg_desync!(conn, conn.stream.write_message(
|
2014-09-30 06:32:57 +00:00
|
|
|
&CopyFail {
|
|
|
|
message: "Invalid column count",
|
|
|
|
}));
|
2014-10-01 21:40:43 +00:00
|
|
|
break 'l;
|
2014-09-30 05:56:43 +00:00
|
|
|
}
|
2014-09-30 06:32:57 +00:00
|
|
|
(None, None) => break
|
2014-09-30 05:56:43 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-10-01 21:40:43 +00:00
|
|
|
try_pg_desync!(conn, conn.stream.write_message(
|
2014-09-30 06:09:39 +00:00
|
|
|
&CopyData {
|
2014-10-05 03:08:44 +00:00
|
|
|
data: buf.unwrap()[]
|
2014-09-30 06:09:39 +00:00
|
|
|
}));
|
2014-09-30 05:56:43 +00:00
|
|
|
buf = MemWriter::new();
|
|
|
|
}
|
|
|
|
|
|
|
|
let _ = buf.write_be_i16(-1);
|
2014-10-01 21:40:43 +00:00
|
|
|
try_pg!(conn.write_messages([
|
|
|
|
CopyData {
|
2014-10-05 03:08:44 +00:00
|
|
|
data: buf.unwrap()[],
|
2014-10-01 21:40:43 +00:00
|
|
|
},
|
|
|
|
CopyDone,
|
|
|
|
Sync]));
|
2014-09-30 05:56:43 +00:00
|
|
|
|
2014-09-30 07:11:23 +00:00
|
|
|
let num = match try_pg!(conn.read_message_()) {
|
|
|
|
CommandComplete { tag } => util::parse_update_count(tag),
|
2014-09-30 05:56:43 +00:00
|
|
|
ErrorResponse { fields } => {
|
|
|
|
try!(conn.wait_for_ready());
|
2014-10-01 05:52:27 +00:00
|
|
|
return PostgresDbError::new(fields);
|
2014-09-30 05:56:43 +00:00
|
|
|
}
|
|
|
|
_ => {
|
|
|
|
conn.desynchronized = true;
|
|
|
|
return Err(PgBadResponse);
|
|
|
|
}
|
2014-09-30 07:11:23 +00:00
|
|
|
};
|
2014-09-30 05:56:43 +00:00
|
|
|
|
2014-09-30 07:11:23 +00:00
|
|
|
try!(conn.wait_for_ready());
|
|
|
|
Ok(num)
|
2014-09-30 05:56:43 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/// Consumes the statement, clearing it from the Postgres session.
|
|
|
|
///
|
|
|
|
/// Functionally identical to the `Drop` implementation of the
|
|
|
|
/// `PostgresCopyInStatement` except that it returns any error to the
|
|
|
|
/// caller.
|
|
|
|
pub fn finish(mut self) -> PostgresResult<()> {
|
|
|
|
self.finished = true;
|
|
|
|
self.finish_inner()
|
|
|
|
}
|
|
|
|
}
|