$result = $pg->query('SELECT * FROM test ') If you are using Open Swoole connect("host=127.0.0.1 port=5432 dbname=test user=postgres password=***") You can enable Coroutine PHP PostgreSQL Client with option: -with-postgres. You can use the provided Postgres client within a coroutine context without blocking the process. Std::cerr << "Error: " << e.The Coroutine Postgres Client is included in the main extension since version v4.8.0.Ĭoroutine PHP PostgreSQL Client, support for using Postgres with OpenSwoole and coroutines. Std::cerr << "Query was: " << e.query() << std::endl Std::cerr << "SQL error: " << e.what() << std::endl Even after the connectionįor (auto field: row) std::cout << field.c_str() << " " Results can be accessed and iterated again. / Query employees from database, print results. Connection object goes out of scope here. explicit about when the transaction is done. Not really needed, since we made no changes, but good habit to be Normally you'd let the database doįor (auto : txn.query("SELECT salary FROM Employee")) Use txn.quote() to escape and quote a C++ string for use as an SQL string For querying just one single value, the transaction has a shorthand method (Normally you'd check for valid command-line arguments.) "SELECT generate_series, 'row #' || generate_series "įor (auto const & : tx.stream( TODO: Check for errors, report, clean up. Real-world version to be slower and more cumbersome. All of that can be fixed, but the upshot is: expect a Its central loop doesn't even have a good way ofĭetecting errors. Note that it's full of missingĮrror checking & handling. Here's the C-and-libpq programme I benchmarked. May vary™, querying your database can be faster in libpqxx than a close I'm calling it, based on an entirely unscientific, off-the-cuff, unbalanced,Īnd non-peer-reviewed toy benchmark. These are booleans that should say whether the string_traits class implements conversion, respectively, from the type to a string and from a string to the type.Įnjoy this one! I'm sure somebody will find a problem, with so many changes, in which case we'll to a 7.8.1 soon. If you implement the text conversions for your own types, there are two new fields that your string_traits specialisation: converts_to_string and converts_from_string. There were some other small tweaks as well.
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