AMashenkov commented on code in PR #858: URL: https://github.com/apache/ignite-3/pull/858#discussion_r891458296
########## docs/_docs/sql/java.adoc: ########## @@ -0,0 +1,68 @@ +// Licensed to the Apache Software Foundation (ASF) under one or more +// contributor license agreements. See the NOTICE file distributed with +// this work for additional information regarding copyright ownership. +// The ASF licenses this file to You under the Apache License, Version 2.0 +// (the "License"); you may not use this file except in compliance with +// the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. += Java SQL API + +In your Java projects, you can use the Java SQL API to execute SQL statements and getting results. All operations are executed as a part of sql session. You can create a session with default parameters by using a `sql.createSession()` method, or use an `sql.sessionBuilder` to configure it for your environment. The `execute` method accepts a query String, or a Statement object, that can be created by using `sql.createStatement()` and `sql.statementBuilder()` methods. + +== Creating Tables + +Here is an example of how you can create a new table on a cluster: + +[source, java] +---- +IgniteSql sql = CLUSTER_NODES.get(0).sql(); +Session ses = sql.createSession(); +ResultSet synchRes = ses.execute( + null, + `CREATE TABLE SYNCH(ID INT PRIMARY KEY, VAL0 INT)` +); + +AsyncResultSet asyncRes = fut.get(); + +ses.closeAsync().get(); +---- + + +== Filling Tables + +With Apache Ignite 3, you can fill the table by adding rows one by one, or in a batch. In both cases, you create an `INSERT` statement, and then exeute it: + + +[source, java] +---- +long rowsAdded = Arrays.stream(ses.executeBatch(null, + "INSERT INTO ACCOUNTS (ACCOUNT_ID, CITY_ID, FIRST_NAME, LAST_NAME, BALANCE) values (?, ?, ?, ?, ?)", + BatchedArguments.of(1, 1, "John", "Doe", 1000.0d) + .add(2, 1, "Jane", "Roe", 2000.0d) + .add(3, 1, "Mary", "Major", 1500.0d) + .add(4, 1, "Richard", "Miles", 1450.0d))) + .asLongStream().sum(); +---- + +== Getting Data From Tables + +To get data from a table, execute a `SELECT` statement to get a set of results. You can then iterate through results to get data: Review Comment: It worth to mention that ResultSet may hold server-side cursor open due to lazy query execution and must be closed manually or via using try-with-resources block. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
