Using connections

When you need to execute sequential queries (without a transaction), you can create a new connection or borrow one from the pool:

Code not translatable

Prepared queries can be created:

var Tuple = require("vertx-sql-client-js/tuple");
connection.prepare("SELECT * FROM users WHERE first_name LIKE ?", function (ar1, ar1_err) {
  if (ar1_err == null) {
    var pq = ar1;
    pq.execute(Tuple.of("julien"), function (ar2, ar2_err) {
      if (ar2_err == null) {
        // All rows
        var rows = ar2;
      }
    });
  }
});
Note
prepared query caching depends on the cachePreparedStatements and does not depend on whether you are creating prepared queries or use direct prepared queries

PreparedQuery can perform efficient batching:

var Tuple = require("vertx-sql-client-js/tuple");
connection.prepare("INSERT INTO USERS (id, name) VALUES (?, ?)", function (ar1, ar1_err) {
  if (ar1_err == null) {
    var prepared = ar1;

    // Create a query : bind parameters
    var batch = [];

    // Add commands to the createBatch
    batch.push(Tuple.of("julien", "Julien Viet"));
    batch.push(Tuple.of("emad", "Emad Alblueshi"));

    prepared.batch(batch, function (res, res_err) {
      if (res_err == null) {

        // Process rows
        var rows = res;
      } else {
        console.log("Batch failed " + res_err);
      }
    });
  }
});