add version function (#133)

Change-Id: Iddb66c3bfb3f4f2948ce51fed4586ac24160aad5

Cargo.toml

@@ -23,9 +23,9 @@ members = ["libduckdb-sys"]
 [features]
 default = []
 bundled = ["libduckdb-sys/bundled"]
-httpfs = ["libduckdb-sys/httpfs"]
-json = ["libduckdb-sys/json"]
-parquet = ["libduckdb-sys/parquet"]
+httpfs = ["libduckdb-sys/httpfs", "bundled"]
+json = ["libduckdb-sys/json", "bundled"]
+parquet = ["libduckdb-sys/parquet", "bundled"]
 extensions-full = ["httpfs", "json", "parquet"]
 
 buildtime_bindgen = ["libduckdb-sys/buildtime_bindgen"]

src/lib.rs

@@ -524,6 +524,11 @@ impl Connection {
             path: self.path.clone(),
         })
     }
+
+    /// Returns the version of the DuckDB library
+    pub fn version(&self) -> Result<String> {
+        self.query_row("PRAGMA version", [], |row| row.get(0))
+    }
 }
 
 impl fmt::Debug for Connection {
@@ -1266,4 +1271,14 @@ mod test {
         assert_eq!(DatabaseName::Attached("abc").to_string(), "abc");
         Ok(())
     }
+
+    #[cfg(feature = "bundled")]
+    #[test]
+    fn test_version() -> Result<()> {
+        let db = checked_memory_handle();
+        const VERSION: &str = env!("CARGO_PKG_VERSION");
+        let version = db.version()?;
+        assert_eq!(version, VERSION);
+        Ok(())
+    }
 }