feat(rust): Add initial Postgres support + tests

rust/ql/test/library-tests/frameworks/postgres/cargo.toml.manual

@@ -0,0 +1,13 @@
+[workspace]
+
+[package]
+name = "postgres-test"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+postgres = { version = "0.19" }
+
+[[bin]]
+name = "postgres"
+path = "./main.rs"

rust/ql/test/library-tests/frameworks/postgres/main.rs

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+
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Get input from CLI
+    let args: Vec<String> = std::env::args().collect();
+    let name = &args[1];
+    let age = &args[2];
+
+    let mut conn = postgres::Client::connect("host=localhost user=postgres", postgres::NoTls)?;
+
+    conn.execute(       // $ sql-sink
+        "CREATE TABLE person (
+            id SERIAL PRIMARY KEY,
+            name VARCHAR NOT NULL,
+            age INT NOT NULL
+        )",
+        &[],
+    )?;
+    
+    let query = format!("INSERT INTO person (name, age) VALUES ('{}', '{}')", name, age);
+
+    conn.execute(query.as_str(), &[])?;     // $ sql-sink
+    conn.batch_execute(query.as_str())?;    // $ sql-sink
+
+    conn.prepare(query.as_str())?;          // $ sql-sink
+    // conn.prepare_typed(query.as_str(), &[])?;
+
+    conn.query(query.as_str(), &[])?;       // $ sql-sink
+    conn.query_one(query.as_str(), &[])?;   // $ sql-sink
+    conn.query_opt(query.as_str(), &[])?;   // $ sql-sink
+    // conn.query_raw(query.as_str(), &[])?;
+    // conn.query_typed(query.as_str(), &[])?;
+    // conn.query_typed_raw(query.as_str(), &[])?;
+
+    for row in &conn.query("SELECT id, name, age FROM person", &[])? {  // $ sql-sink
+        let id: i32 = row.get("id");
+        let name: &str = row.get("name");
+        let age: i32 = row.get("age");
+        println!("found person: {} {} {}", id, name, age);
+    }
+
+    Ok(())
+}

rust/ql/test/library-tests/frameworks/postgres/options.yml

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+qltest_cargo_check: true
+qltest_dependencies:
+    - postgres = { version = "0.19" }