feat(examples): add initial postgres+async-std quickstart

Cargo.lock

@@ -1068,6 +1068,7 @@ dependencies = [
  "futures-util",
  "sqlx-core",
  "sqlx-mysql",
+ "sqlx-postgres",
 ]
 
 [[package]]
@@ -1122,6 +1123,7 @@ version = "0.6.0-pre"
 dependencies = [
  "anyhow",
  "atoi",
+ "base64",
  "bitflags",
  "bytes",
  "bytestring",

examples/Cargo.lock

@@ -153,6 +153,15 @@ version = "4.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e91831deabf0d6d7ec49552e489aed63b7456a7a3c46cff62adad428110b0af0"
 
+[[package]]
+name = "atoi"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "616896e05fc0e2649463a93a15183c6a16bf03413a7af88ef1285ddedfa9cda5"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "atomic-waker"
 version = "1.0.0"
@@ -987,6 +996,7 @@ dependencies = [
  "futures-util",
  "sqlx-core",
  "sqlx-mysql",
+ "sqlx-postgres",
 ]
 
 [[package]]
@@ -1028,6 +1038,25 @@ dependencies = [
  "url",
 ]
 
+[[package]]
+name = "sqlx-postgres"
+version = "0.6.0-pre"
+dependencies = [
+ "atoi",
+ "base64",
+ "bitflags",
+ "bytes",
+ "bytestring",
+ "either",
+ "futures-io",
+ "futures-util",
+ "log",
+ "memchr",
+ "percent-encoding",
+ "sqlx-core",
+ "url",
+]
+
 [[package]]
 name = "sqlx_example_quickstart_mysql_async-std"
 version = "0.0.0"
@@ -1060,6 +1089,17 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "sqlx_example_quickstart_postgres_async-std"
+version = "0.0.0"
+dependencies = [
+ "anyhow",
+ "async-std",
+ "env_logger",
+ "log",
+ "sqlx",
+]
+
 [[package]]
 name = "subtle"
 version = "2.4.0"

examples/Cargo.toml

@@ -2,5 +2,6 @@
 members = [
     "quickstart/mysql+blocking",
     "quickstart/mysql+async-std",
-    "quickstart/mysql+tokio"
+    "quickstart/mysql+tokio",
+    "quickstart/postgres+async-std",
 ]

examples/quickstart/postgres+async-std/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "sqlx_example_quickstart_postgres_async-std"
+version = "0.0.0"
+license = "MIT OR Apache-2.0"
+edition = "2018"
+authors = [
+    "LaunchBadge <contact@launchbadge.com>"
+]
+
+[dependencies]
+anyhow = "1.0.36"
+async-std = { version = "1.8.0", features = ["attributes"] }
+log = "0.4"
+env_logger = "0.8.2"
+sqlx = { path = "../../../sqlx", features = [ "async-std", "postgres-async" ] }

examples/quickstart/postgres+async-std/src/main.rs

@@ -0,0 +1,36 @@
+use sqlx::postgres::{PgConnectOptions, PgConnection};
+
+#[async_std::main]
+async fn main() -> anyhow::Result<()> {
+    env_logger::try_init()?;
+
+    // start by parsing the connection URL (typically from an environment variable)
+    let mut conn: PgConnection = PgConnectOptions::parse("postgres://postgres@localhost")?
+        // set a password (perhaps from somewhere else than the rest of the URL)
+        .password("password")
+        // connect to the database (blocking)
+        .connect()
+        .await?;
+
+    // the following are equivalent to the above:
+
+    // let mut conn = PgConnection::<AsyncStd>::connect("mysql://root:password@localhost").await?;
+    // let mut conn = <PgConnection>::connect("mysql://root:password@localhost").await?;
+    // let mut conn = PgConnectOptions::<AsyncStd>::new().username("root").password("password").connect().await?;
+    // let mut conn = <PgConnectOptions>::new().username("root").password("password").connect().await?;
+
+    // the <...> syntax is an escape into the type syntax
+    //  when writing a *type*, Rust allows default type parameters
+    //  as opposed to writing a *path* where it does not (yet)
+
+    // ping, this makes sure the server is still there
+    // hopefully it is – we did just connect to it
+    conn.ping().await?;
+
+    // close the connection explicitly
+    // this kindly informs the database server that we'll be terminating
+    // while not strictly required, the server will dispose of connection resources faster
+    conn.close().await?;
+
+    Ok(())
+}