Function infer_schema

datafusion/core/src/datasource/file_format/json.rs:145–160

()

    #[tokio::test]
    async fn infer_schema() -> Result<()> {
        let projection = None;
        let session_ctx = SessionContext::new();
        let state = session_ctx.state();
        let exec = get_exec(&state, projection, None).await?;

        let x: Vec<String> = exec
            .schema()
            .fields()
            .iter()
            .map(|f| format!("{}: {:?}", f.name(), f.data_type()))
            .collect();
        assert_eq!(vec!["a: Int64", "b: Float64", "c: Boolean", "d: Utf8",], x);

        Ok(())
    }

    #[tokio::test]
    async fn read_int_column() -> Result<()> {