use arrow_odbc::{odbc_api::Environment, OdbcReader}; const CONNECTION_STRING: &str = "Driver={PostgreSQL ANSI(x64)}; Server=127.0.0.1;Port=5433; UID=postgres; PWD=postgres;"; fn main() { let odbc_environment = Environment::new().unwrap(); // Connect with database. let connection = odbc_environment.connect_with_connection_string(CONNECTION_STRING).unwrap(); // This SQL statement does not require any arguments. let parameters = (); // Execute query and create result set let cursor = connection .execute("SELECT * FROM hzfc limit 3", parameters).unwrap() .expect("SELECT statement must produce a cursor"); // Each batch shall only consist of maximum 10.000 rows. let max_batch_size = 10_000; // Read result set as arrow batches. Infer Arrow types automatically using the meta // information of `cursor`. let arrow_record_batches = OdbcReader::new(cursor, max_batch_size).unwrap(); for batch in arrow_record_batches { println!("{:?}", batch.unwrap()); println!("===============================\n"); } // Ok(()) }
标签:unwrap,odbc,batch,cursor,let,arrow,obdc From: https://www.cnblogs.com/pythonClub/p/16745366.html