本文整理汇总了Java中org.apache.flink.table.api.java.StreamTableEnvironment.fromDataStream方法的典型用法代码示例。如果您正苦于以下问题:Java StreamTableEnvironment.fromDataStream方法的具体用法?Java StreamTableEnvironment.fromDataStream怎么用?Java StreamTableEnvironment.fromDataStream使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.flink.table.api.java.StreamTableEnvironment
的用法示例。
在下文中一共展示了StreamTableEnvironment.fromDataStream方法的7个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: testSelect
import org.apache.flink.table.api.java.StreamTableEnvironment; //导入方法依赖的package包/类
@Test
public void testSelect() throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
StreamTableEnvironment tableEnv = TableEnvironment.getTableEnvironment(env);
StreamITCase.clear();
DataStream<Tuple3<Integer, Long, String>> ds = StreamTestData.getSmall3TupleDataSet(env);
Table in = tableEnv.fromDataStream(ds, "a,b,c");
tableEnv.registerTable("MyTable", in);
String sqlQuery = "SELECT * FROM MyTable";
Table result = tableEnv.sql(sqlQuery);
DataStream<Row> resultSet = tableEnv.toAppendStream(result, Row.class);
resultSet.addSink(new StreamITCase.StringSink<Row>());
env.execute();
List<String> expected = new ArrayList<>();
expected.add("1,1,Hi");
expected.add("2,2,Hello");
expected.add("3,2,Hello world");
StreamITCase.compareWithList(expected);
}
示例2: testSelect
import org.apache.flink.table.api.java.StreamTableEnvironment; //导入方法依赖的package包/类
@Test
public void testSelect() throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
StreamTableEnvironment tableEnv = TableEnvironment.getTableEnvironment(env);
StreamITCase.clear();
DataStream<Tuple3<Integer, Long, String>> ds = JavaStreamTestData.getSmall3TupleDataSet(env);
Table in = tableEnv.fromDataStream(ds, "a,b,c");
tableEnv.registerTable("MyTable", in);
String sqlQuery = "SELECT * FROM MyTable";
Table result = tableEnv.sqlQuery(sqlQuery);
DataStream<Row> resultSet = tableEnv.toAppendStream(result, Row.class);
resultSet.addSink(new StreamITCase.StringSink<Row>());
env.execute();
List<String> expected = new ArrayList<>();
expected.add("1,1,Hi");
expected.add("2,2,Hello");
expected.add("3,2,Hello world");
StreamITCase.compareWithList(expected);
}
示例3: testRowRegisterRowWithNames
import org.apache.flink.table.api.java.StreamTableEnvironment; //导入方法依赖的package包/类
@Test
public void testRowRegisterRowWithNames() throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
StreamTableEnvironment tableEnv = TableEnvironment.getTableEnvironment(env);
StreamITCase.clear();
List<Row> data = new ArrayList<>();
data.add(Row.of(1, 1L, "Hi"));
data.add(Row.of(2, 2L, "Hello"));
data.add(Row.of(3, 2L, "Hello world"));
TypeInformation<?>[] types = {
BasicTypeInfo.INT_TYPE_INFO,
BasicTypeInfo.LONG_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO};
String[] names = {"a", "b", "c"};
RowTypeInfo typeInfo = new RowTypeInfo(types, names);
DataStream<Row> ds = env.fromCollection(data).returns(typeInfo);
Table in = tableEnv.fromDataStream(ds, "a,b,c");
tableEnv.registerTable("MyTableRow", in);
String sqlQuery = "SELECT a,c FROM MyTableRow";
Table result = tableEnv.sql(sqlQuery);
DataStream<Row> resultSet = tableEnv.toAppendStream(result, Row.class);
resultSet.addSink(new StreamITCase.StringSink<Row>());
env.execute();
List<String> expected = new ArrayList<>();
expected.add("1,Hi");
expected.add("2,Hello");
expected.add("3,Hello world");
StreamITCase.compareWithList(expected);
}
示例4: testUnion
import org.apache.flink.table.api.java.StreamTableEnvironment; //导入方法依赖的package包/类
@Test
public void testUnion() throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
StreamTableEnvironment tableEnv = TableEnvironment.getTableEnvironment(env);
StreamITCase.clear();
DataStream<Tuple3<Integer, Long, String>> ds1 = StreamTestData.getSmall3TupleDataSet(env);
Table t1 = tableEnv.fromDataStream(ds1, "a,b,c");
tableEnv.registerTable("T1", t1);
DataStream<Tuple5<Integer, Long, Integer, String, Long>> ds2 = StreamTestData.get5TupleDataStream(env);
tableEnv.registerDataStream("T2", ds2, "a, b, d, c, e");
String sqlQuery = "SELECT * FROM T1 " +
"UNION ALL " +
"(SELECT a, b, c FROM T2 WHERE a < 3)";
Table result = tableEnv.sql(sqlQuery);
DataStream<Row> resultSet = tableEnv.toAppendStream(result, Row.class);
resultSet.addSink(new StreamITCase.StringSink<Row>());
env.execute();
List<String> expected = new ArrayList<>();
expected.add("1,1,Hi");
expected.add("2,2,Hello");
expected.add("3,2,Hello world");
expected.add("1,1,Hallo");
expected.add("2,2,Hallo Welt");
expected.add("2,3,Hallo Welt wie");
StreamITCase.compareWithList(expected);
}
示例5: testRowRegisterRowWithNames
import org.apache.flink.table.api.java.StreamTableEnvironment; //导入方法依赖的package包/类
@Test
public void testRowRegisterRowWithNames() throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
StreamTableEnvironment tableEnv = TableEnvironment.getTableEnvironment(env);
StreamITCase.clear();
List<Row> data = new ArrayList<>();
data.add(Row.of(1, 1L, "Hi"));
data.add(Row.of(2, 2L, "Hello"));
data.add(Row.of(3, 2L, "Hello world"));
TypeInformation<?>[] types = {
BasicTypeInfo.INT_TYPE_INFO,
BasicTypeInfo.LONG_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO};
String[] names = {"a", "b", "c"};
RowTypeInfo typeInfo = new RowTypeInfo(types, names);
DataStream<Row> ds = env.fromCollection(data).returns(typeInfo);
Table in = tableEnv.fromDataStream(ds, "a,b,c");
tableEnv.registerTable("MyTableRow", in);
String sqlQuery = "SELECT a,c FROM MyTableRow";
Table result = tableEnv.sqlQuery(sqlQuery);
DataStream<Row> resultSet = tableEnv.toAppendStream(result, Row.class);
resultSet.addSink(new StreamITCase.StringSink<Row>());
env.execute();
List<String> expected = new ArrayList<>();
expected.add("1,Hi");
expected.add("2,Hello");
expected.add("3,Hello world");
StreamITCase.compareWithList(expected);
}
示例6: testUnion
import org.apache.flink.table.api.java.StreamTableEnvironment; //导入方法依赖的package包/类
@Test
public void testUnion() throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
StreamTableEnvironment tableEnv = TableEnvironment.getTableEnvironment(env);
StreamITCase.clear();
DataStream<Tuple3<Integer, Long, String>> ds1 = JavaStreamTestData.getSmall3TupleDataSet(env);
Table t1 = tableEnv.fromDataStream(ds1, "a,b,c");
tableEnv.registerTable("T1", t1);
DataStream<Tuple5<Integer, Long, Integer, String, Long>> ds2 = JavaStreamTestData.get5TupleDataStream(env);
tableEnv.registerDataStream("T2", ds2, "a, b, d, c, e");
String sqlQuery = "SELECT * FROM T1 " +
"UNION ALL " +
"(SELECT a, b, c FROM T2 WHERE a < 3)";
Table result = tableEnv.sqlQuery(sqlQuery);
DataStream<Row> resultSet = tableEnv.toAppendStream(result, Row.class);
resultSet.addSink(new StreamITCase.StringSink<Row>());
env.execute();
List<String> expected = new ArrayList<>();
expected.add("1,1,Hi");
expected.add("2,2,Hello");
expected.add("3,2,Hello world");
expected.add("1,1,Hallo");
expected.add("2,2,Hallo Welt");
expected.add("2,3,Hallo Welt wie");
StreamITCase.compareWithList(expected);
}
示例7: testEndToEnd
import org.apache.flink.table.api.java.StreamTableEnvironment; //导入方法依赖的package包/类
/**
* Tests the end-to-end functionality of table source & sink.
*
* <p>This test uses the {@link FlinkPravegaTableSink} to emit an in-memory table
* containing sample data as a Pravega stream of 'append' events (i.e. as a changelog).
* The test then uses the {@link FlinkPravegaTableSource} to absorb the changelog as a new table.
*
* <p>Flink's ability to convert POJOs (e.g. {@link SampleRecord}) to/from table rows is also demonstrated.
*
* <p>Because the source is unbounded, the test must throw an exception to deliberately terminate the job.
*
* @throws Exception on exception
*/
@Test
public void testEndToEnd() throws Exception {
// create a Pravega stream for test purposes
StreamId stream = new StreamId(setupUtils.getScope(), "FlinkTableITCase.testEndToEnd");
this.setupUtils.createTestStream(stream.getName(), 1);
// create a Flink Table environment
StreamExecutionEnvironment env = StreamExecutionEnvironment.createLocalEnvironment().setParallelism(1);
StreamTableEnvironment tableEnv = TableEnvironment.getTableEnvironment(env);
// define a table of sample data from a collection of POJOs. Schema:
// root
// |-- category: String
// |-- value: Integer
Table table = tableEnv.fromDataStream(env.fromCollection(SAMPLES));
// write the table to a Pravega stream (using the 'category' column as a routing key)
FlinkPravegaTableSink sink = new FlinkPravegaTableSink(
this.setupUtils.getControllerUri(), stream, JsonRowSerializationSchema::new, "category");
table.writeToSink(sink);
// register the Pravega stream as a table called 'samples'
FlinkPravegaTableSource source = new FlinkPravegaTableSource(
this.setupUtils.getControllerUri(), stream, 0, JsonRowDeserializationSchema::new, SAMPLE_SCHEMA);
tableEnv.registerTableSource("samples", source);
// select some sample data from the Pravega-backed table, as a view
Table view = tableEnv.sql("SELECT * FROM samples WHERE category IN ('A','B')");
// write the view to a test sink that verifies the data for test purposes
tableEnv.toAppendStream(view, SampleRecord.class).addSink(new TestSink(SAMPLES));
// execute the topology
try {
env.execute();
Assert.fail("expected an exception");
} catch (JobExecutionException e) {
// we expect the job to fail because the test sink throws a deliberate exception.
Assert.assertTrue(e.getCause() instanceof TestCompletionException);
}
}