JAkutenshi commented on code in PR #6585: URL: https://github.com/apache/ignite-3/pull/6585#discussion_r2348802223
########## examples/java/src/main/java/org/apache/ignite/example/table/TableExample.java: ########## @@ -0,0 +1,89 @@ +/* + * 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. + */ + +package org.apache.ignite.example.table; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.Statement; +import java.util.List; +import org.apache.ignite.client.IgniteClient; +import org.apache.ignite.table.IgniteTables; +import org.apache.ignite.table.KeyValueView; +import org.apache.ignite.table.QualifiedName; +import org.apache.ignite.table.Table; +import org.apache.ignite.table.Tuple; + +/** + * This example demonstrates the usage of the {@link KeyValueView} API. + * + * <p>Find instructions on how to run the example in the README.md file located in the "examples" directory root. + */ +public class TableExample { + /** + * Main method of the example. + * + * @param args The command line arguments. + * @throws Exception If failed. + */ + public static void main(String[] args) throws Exception { + + try (IgniteClient client = IgniteClient.builder() + .addresses("127.0.0.1:10800") + .build() + ) { + // Create a table to work with later + client.sql().execute(null, "CREATE TABLE IF NOT EXISTS Person (" + + "id int primary key," + + "city_id int," + + "name varchar," + + "age int," + + "company varchar" + ); + + // Get the tables API to interact with database tables + IgniteTables tableApi = client.tables(); + + // Retrieve a list of all existing tables in the cluster + //List<Table> existingTables = tableApi.tables(); + + // Get the first table from the list (for demonstration purposes) + //Table firstTable = existingTables.get(0); + + // Access a specific table by its simple name + //Table specificTable = tableApi.table("MY_TABLE"); + + // Create a qualified table name by parsing a string (schema.table format) + QualifiedName qualifiedTableName = QualifiedName.parse("PUBLIC.MY_QUALIFIED_TABLE"); Review Comment: If I run this main, thus there no `MY_QUALIFIED_TABLE` table, only `Person`, so `myTable.recordView().insert(null, personTuple) below will lead to NPE. ########## examples/java/src/main/java/org/apache/ignite/example/table/TableExample.java: ########## @@ -0,0 +1,89 @@ +/* + * 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. + */ + +package org.apache.ignite.example.table; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.Statement; +import java.util.List; +import org.apache.ignite.client.IgniteClient; +import org.apache.ignite.table.IgniteTables; +import org.apache.ignite.table.KeyValueView; +import org.apache.ignite.table.QualifiedName; +import org.apache.ignite.table.Table; +import org.apache.ignite.table.Tuple; + +/** + * This example demonstrates the usage of the {@link KeyValueView} API. + * + * <p>Find instructions on how to run the example in the README.md file located in the "examples" directory root. + */ +public class TableExample { + /** + * Main method of the example. + * + * @param args The command line arguments. + * @throws Exception If failed. + */ + public static void main(String[] args) throws Exception { + + try (IgniteClient client = IgniteClient.builder() + .addresses("127.0.0.1:10800") + .build() + ) { + // Create a table to work with later + client.sql().execute(null, "CREATE TABLE IF NOT EXISTS Person (" + + "id int primary key," + + "city_id int," + + "name varchar," + + "age int," + + "company varchar" + ); + + // Get the tables API to interact with database tables + IgniteTables tableApi = client.tables(); + + // Retrieve a list of all existing tables in the cluster + //List<Table> existingTables = tableApi.tables(); + + // Get the first table from the list (for demonstration purposes) + //Table firstTable = existingTables.get(0); + + // Access a specific table by its simple name + //Table specificTable = tableApi.table("MY_TABLE"); + + // Create a qualified table name by parsing a string (schema.table format) + QualifiedName qualifiedTableName = QualifiedName.parse("PUBLIC.MY_QUALIFIED_TABLE"); + + // Alternative way to create qualified name using schema and table parts + //QualifiedName qualifiedTableName = QualifiedName.of("PUBLIC", "MY_TABLE"); + + // Access a table using the qualified name (includes schema) + Table myTable = tableApi.table(qualifiedTableName); + + Tuple personTuple = Tuple.create() + .set("id", 1) + .set("cityId", "3") Review Comment: `city_id`? Schema mismatch. Also the value should be `int`. ########## examples/java/src/main/java/org/apache/ignite/example/table/TableExample.java: ########## @@ -0,0 +1,89 @@ +/* + * 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. + */ + +package org.apache.ignite.example.table; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.Statement; +import java.util.List; +import org.apache.ignite.client.IgniteClient; +import org.apache.ignite.table.IgniteTables; +import org.apache.ignite.table.KeyValueView; +import org.apache.ignite.table.QualifiedName; +import org.apache.ignite.table.Table; +import org.apache.ignite.table.Tuple; + +/** + * This example demonstrates the usage of the {@link KeyValueView} API. + * + * <p>Find instructions on how to run the example in the README.md file located in the "examples" directory root. + */ +public class TableExample { + /** + * Main method of the example. + * + * @param args The command line arguments. + * @throws Exception If failed. + */ + public static void main(String[] args) throws Exception { + + try (IgniteClient client = IgniteClient.builder() + .addresses("127.0.0.1:10800") + .build() + ) { + // Create a table to work with later + client.sql().execute(null, "CREATE TABLE IF NOT EXISTS Person (" + + "id int primary key," + + "city_id int," + + "name varchar," + + "age int," + + "company varchar" Review Comment: Missed close parenthesis `)` that leads to SQL exception ########## examples/java/src/main/java/org/apache/ignite/example/table/MapperExample.java: ########## @@ -0,0 +1,72 @@ +/* + * 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. + */ + +package org.apache.ignite.example.table; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; +import org.apache.ignite.client.IgniteClient; +import org.apache.ignite.table.RecordView; +import org.apache.ignite.table.Tuple; +import org.apache.ignite.table.mapper.Mapper; +import org.apache.ignite.table.mapper.TypeConverter; + +public class MapperExample { + static class BinaryTypeConverter implements TypeConverter<Person, byte[]> { + + @Override + public Person toObjectType(byte[] bytes) throws IOException, ClassNotFoundException { + try (var in = new ObjectInputStream(new ByteArrayInputStream(bytes))) { + return (Person) in.readObject(); + } + } + + @Override + public byte[] toColumnType(Person person) throws IOException { + try (var bos = new ByteArrayOutputStream(); + var out = new ObjectOutputStream(bos)) { + out.writeObject(person); + return bos.toByteArray(); + } + } + } + + + public static void main(String[] args) throws Exception { + var mapper = Mapper.builder(Person.class) + .automap() + .map("city", "city", new BinaryTypeConverter()) Review Comment: In `TableExample` column is named as `city_id`, this will ead to an exception for a user. Moreover in `Person` there is no `city` field, but `cityId` ########## examples/java/src/main/java/org/apache/ignite/example/table/TableExample.java: ########## @@ -0,0 +1,89 @@ +/* + * 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. + */ + +package org.apache.ignite.example.table; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.Statement; +import java.util.List; +import org.apache.ignite.client.IgniteClient; +import org.apache.ignite.table.IgniteTables; +import org.apache.ignite.table.KeyValueView; +import org.apache.ignite.table.QualifiedName; +import org.apache.ignite.table.Table; +import org.apache.ignite.table.Tuple; + +/** + * This example demonstrates the usage of the {@link KeyValueView} API. + * + * <p>Find instructions on how to run the example in the README.md file located in the "examples" directory root. + */ +public class TableExample { + /** + * Main method of the example. + * + * @param args The command line arguments. + * @throws Exception If failed. + */ + public static void main(String[] args) throws Exception { + + try (IgniteClient client = IgniteClient.builder() + .addresses("127.0.0.1:10800") + .build() + ) { + // Create a table to work with later + client.sql().execute(null, "CREATE TABLE IF NOT EXISTS Person (" + + "id int primary key," + + "city_id int," + + "name varchar," + + "age int," + + "company varchar" + ); + + // Get the tables API to interact with database tables + IgniteTables tableApi = client.tables(); + + // Retrieve a list of all existing tables in the cluster + //List<Table> existingTables = tableApi.tables(); + + // Get the first table from the list (for demonstration purposes) + //Table firstTable = existingTables.get(0); + + // Access a specific table by its simple name + //Table specificTable = tableApi.table("MY_TABLE"); + + // Create a qualified table name by parsing a string (schema.table format) + QualifiedName qualifiedTableName = QualifiedName.parse("PUBLIC.MY_QUALIFIED_TABLE"); + + // Alternative way to create qualified name using schema and table parts + //QualifiedName qualifiedTableName = QualifiedName.of("PUBLIC", "MY_TABLE"); + + // Access a table using the qualified name (includes schema) + Table myTable = tableApi.table(qualifiedTableName); + + Tuple personTuple = Tuple.create() + .set("id", 1) + .set("cityId", "3") + .set("name", "John") + .set("age", 32) + .set("company", ""); + + myTable.recordView().insert(null, personTuple); Review Comment: I'd to suggest the follow ending: ```java RecordView<Tuple> personTableView = myTable.recordView(); Tuple personTuple = Tuple.create() .set("id", 1) .set("city_id", 3) .set("name", "John") .set("age", 32) .set("company", ""); personTableView.insert(null, personTuple); Tuple personIdTuple = Tuple.create() .set("id", 1); Tuple insertedPerson = personTableView.get(null, personIdTuple); System.out.println("Person name: " + insertedPerson.stringValue("name")); ``` This will explicit the view object and assert that the tuple was inserted successfully. ########## examples/java/src/main/java/org/apache/ignite/example/table/QueryExample.java: ########## @@ -0,0 +1,121 @@ +/* + * 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. + */ + +package org.apache.ignite.example.table; + +import static org.apache.ignite.table.criteria.Criteria.and; +import static org.apache.ignite.table.criteria.Criteria.columnValue; +import static org.apache.ignite.table.criteria.Criteria.equalTo; +import static org.apache.ignite.table.criteria.Criteria.greaterThan; + +import java.util.Iterator; +import java.util.Map.Entry; +import org.apache.ignite.client.IgniteClient; +import org.apache.ignite.lang.AsyncCursor; +import org.apache.ignite.lang.Cursor; +import org.apache.ignite.table.IgniteTables; +import org.apache.ignite.table.Table; +import org.apache.ignite.table.Tuple; +import org.apache.ignite.tx.Transaction; + +public class QueryExample { + + public static void main(String[] args) throws Exception { + // Initialize Ignite client with connection configuration + try (IgniteClient client = IgniteClient.builder() + .addresses("127.0.0.1:10800") + .build()) { + + // Get a table + IgniteTables tablesApi = client.tables(); + Table myTable = tablesApi.table("MY_TABLE"); + + // Example 1: Query without transaction + performQueryWithoutTransaction(myTable); + + // Example 2: Query within transaction + performQueryWithTransaction(client, myTable); + + // Example 3: Query asynchronously + performQueryAsync(myTable); + } + } + + /** + * Demonstrates querying with an implicit transaction. + */ + public static void performQueryWithoutTransaction(Table table) { + try (Cursor<Entry<Tuple, Tuple>> cursor = table.keyValueView().query( + null, // Implicit transaction + // Query criteria + and( + columnValue("name", equalTo("John Doe")), + columnValue("age", greaterThan(20)) + ) + )) { + // Process query results (keeping original cursor iteration pattern) + // As an example, remove the first found value. + cursor.remove(); Review Comment: `.remove()` this and below will return `UnsupportedOperationException` because of modification is forbidden. I suggest just println the result set. Moreover if you're running after `TableExamples` then there no `John Doe` record, just `John`, so the cursor has no values. Make it consistent. ########## examples/java/src/main/java/org/apache/ignite/example/table/TableExample.java: ########## @@ -0,0 +1,89 @@ +/* + * 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. + */ + +package org.apache.ignite.example.table; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.Statement; +import java.util.List; +import org.apache.ignite.client.IgniteClient; +import org.apache.ignite.table.IgniteTables; +import org.apache.ignite.table.KeyValueView; +import org.apache.ignite.table.QualifiedName; +import org.apache.ignite.table.Table; +import org.apache.ignite.table.Tuple; + +/** + * This example demonstrates the usage of the {@link KeyValueView} API. + * + * <p>Find instructions on how to run the example in the README.md file located in the "examples" directory root. + */ +public class TableExample { + /** + * Main method of the example. + * + * @param args The command line arguments. + * @throws Exception If failed. + */ + public static void main(String[] args) throws Exception { + + try (IgniteClient client = IgniteClient.builder() + .addresses("127.0.0.1:10800") + .build() + ) { + // Create a table to work with later + client.sql().execute(null, "CREATE TABLE IF NOT EXISTS Person (" + + "id int primary key," + + "city_id int," + + "name varchar," + + "age int," + + "company varchar" + ); + + // Get the tables API to interact with database tables + IgniteTables tableApi = client.tables(); + + // Retrieve a list of all existing tables in the cluster + //List<Table> existingTables = tableApi.tables(); + + // Get the first table from the list (for demonstration purposes) + //Table firstTable = existingTables.get(0); + + // Access a specific table by its simple name + //Table specificTable = tableApi.table("MY_TABLE"); + + // Create a qualified table name by parsing a string (schema.table format) + QualifiedName qualifiedTableName = QualifiedName.parse("PUBLIC.MY_QUALIFIED_TABLE"); + + // Alternative way to create qualified name using schema and table parts + //QualifiedName qualifiedTableName = QualifiedName.of("PUBLIC", "MY_TABLE"); + + // Access a table using the qualified name (includes schema) + Table myTable = tableApi.table(qualifiedTableName); + + Tuple personTuple = Tuple.create() + .set("id", 1) + .set("cityId", "3") + .set("name", "John") + .set("age", 32) + .set("company", ""); + + myTable.recordView().insert(null, personTuple); Review Comment: Also i'd like to replace `insert` as `upsert` that makes the example idempotent. ########## examples/java/src/main/java/org/apache/ignite/example/table/Person.java: ########## @@ -0,0 +1,61 @@ +/* + * 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. + */ + +package org.apache.ignite.example.table; + +/** + * Represents a Person entity with database mapping. + * + * Database schema: + * - id: int PRIMARY KEY + * - city_id: int + * - name: varchar + * - age: int + * - company: varchar + */ +public class Person { + private int id; + private int cityId; Review Comment: Due to the `MapperExample` commentary, I would suggest make it `String` there. ########## examples/java/src/main/java/org/apache/ignite/example/table/QueryExample.java: ########## @@ -0,0 +1,121 @@ +/* + * 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. + */ + +package org.apache.ignite.example.table; + +import static org.apache.ignite.table.criteria.Criteria.and; +import static org.apache.ignite.table.criteria.Criteria.columnValue; +import static org.apache.ignite.table.criteria.Criteria.equalTo; +import static org.apache.ignite.table.criteria.Criteria.greaterThan; + +import java.util.Iterator; +import java.util.Map.Entry; +import org.apache.ignite.client.IgniteClient; +import org.apache.ignite.lang.AsyncCursor; +import org.apache.ignite.lang.Cursor; +import org.apache.ignite.table.IgniteTables; +import org.apache.ignite.table.Table; +import org.apache.ignite.table.Tuple; +import org.apache.ignite.tx.Transaction; + +public class QueryExample { + + public static void main(String[] args) throws Exception { + // Initialize Ignite client with connection configuration + try (IgniteClient client = IgniteClient.builder() + .addresses("127.0.0.1:10800") + .build()) { + + // Get a table + IgniteTables tablesApi = client.tables(); + Table myTable = tablesApi.table("MY_TABLE"); Review Comment: There is no such table, do you mean `person`? ########## examples/java/src/main/java/org/apache/ignite/example/table/MapperExample.java: ########## @@ -0,0 +1,72 @@ +/* + * 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. + */ + +package org.apache.ignite.example.table; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; +import org.apache.ignite.client.IgniteClient; +import org.apache.ignite.table.RecordView; +import org.apache.ignite.table.Tuple; +import org.apache.ignite.table.mapper.Mapper; +import org.apache.ignite.table.mapper.TypeConverter; + +public class MapperExample { + static class BinaryTypeConverter implements TypeConverter<Person, byte[]> { Review Comment: You're doing there something strange. The mapper maps your unknown (or unmatched) type of value to table's type. E.g. you in `TableExample` tried to put `String` value as `city_id`, so this is a good example: you implement this with `<String, Integer>` generic types for your field `cityId`: ```java static class CityIdConverter implements TypeConverter<String, Integer> { @Override public String toObjectType(Integer columnValue) { return columnValue.toString(); } @Override public Integer toColumnType(String cityId) { return Integer.parseInt(cityId); } } ``` ...and this will work. Your example will fail, because internals will try to map `city_id` as a number, but mapper will expect `Person` type and will throw `ClassCastException`. ########## examples/java/src/main/java/org/apache/ignite/example/table/TableExample.java: ########## @@ -0,0 +1,89 @@ +/* + * 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. + */ + +package org.apache.ignite.example.table; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.Statement; +import java.util.List; +import org.apache.ignite.client.IgniteClient; +import org.apache.ignite.table.IgniteTables; +import org.apache.ignite.table.KeyValueView; +import org.apache.ignite.table.QualifiedName; +import org.apache.ignite.table.Table; +import org.apache.ignite.table.Tuple; + +/** + * This example demonstrates the usage of the {@link KeyValueView} API. + * + * <p>Find instructions on how to run the example in the README.md file located in the "examples" directory root. + */ +public class TableExample { + /** + * Main method of the example. + * + * @param args The command line arguments. + * @throws Exception If failed. + */ + public static void main(String[] args) throws Exception { + + try (IgniteClient client = IgniteClient.builder() + .addresses("127.0.0.1:10800") + .build() + ) { + // Create a table to work with later + client.sql().execute(null, "CREATE TABLE IF NOT EXISTS Person (" + + "id int primary key," + + "city_id int," + + "name varchar," + + "age int," + + "company varchar" + ); + + // Get the tables API to interact with database tables + IgniteTables tableApi = client.tables(); + + // Retrieve a list of all existing tables in the cluster + //List<Table> existingTables = tableApi.tables(); + + // Get the first table from the list (for demonstration purposes) + //Table firstTable = existingTables.get(0); + + // Access a specific table by its simple name + //Table specificTable = tableApi.table("MY_TABLE"); + + // Create a qualified table name by parsing a string (schema.table format) + QualifiedName qualifiedTableName = QualifiedName.parse("PUBLIC.MY_QUALIFIED_TABLE"); + + // Alternative way to create qualified name using schema and table parts + //QualifiedName qualifiedTableName = QualifiedName.of("PUBLIC", "MY_TABLE"); + + // Access a table using the qualified name (includes schema) + Table myTable = tableApi.table(qualifiedTableName); + + Tuple personTuple = Tuple.create() + .set("id", 1) + .set("cityId", "3") + .set("name", "John") + .set("age", 32) + .set("company", ""); Review Comment: I suggest to fill it up with `Apache` as example, not just empty value, to check it in queries. -- This is an automated message from the Apache Git Service. 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