luoyuxia commented on a change in pull request #16936:
URL: https://github.com/apache/flink/pull/16936#discussion_r697330638
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File path:
flink-connectors/flink-connector-hive/src/test/java/org/apache/flink/connectors/hive/TableEnvHiveConnectorITCase.java
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@@ -73,6 +73,50 @@ public static void setup() {
@ClassRule public static TemporaryFolder tempFolder = new
TemporaryFolder();
+ @Test
+ public void testOverwriteWithEmptySource() throws Exception {
+ TableEnvironment tableEnv = getTableEnvWithHiveCatalog();
+ tableEnv.executeSql("create database db1");
+ try {
+ tableEnv.useDatabase("db1");
+ tableEnv.executeSql("create table src (x int,p int)");
+ // non-partitioned table
+ tableEnv.executeSql("create table dest (x int)");
+ HiveTestUtils.createTextTableInserter(hiveCatalog, "db1", "dest")
+ .addRow(new Object[] {1})
+ .addRow(new Object[] {2})
+ .commit();
+ tableEnv.executeSql("insert overwrite table dest select x from
src").await();
+ List<Row> results =
+ CollectionUtil.iteratorToList(
+ tableEnv.executeSql("select * from
dest").collect());
+ assertEquals(0, results.size());
+ // dynamic partitioned table
+ tableEnv.executeSql("create table destp (x int) partitioned by (p
int)");
+ HiveTestUtils.createTextTableInserter(hiveCatalog, "db1", "destp")
+ .addRow(new Object[] {1})
+ .commit("p=1");
+ HiveTestUtils.createTextTableInserter(hiveCatalog, "db1", "destp")
+ .addRow(new Object[] {2})
+ .commit("p=2");
+ tableEnv.executeSql("insert overwrite table destp partition (p)
select * from src")
+ .await();
+ results =
+ CollectionUtil.iteratorToList(
+ tableEnv.executeSql("select * from destp order by
x").collect());
+ assertEquals("[+I[1, 1], +I[2, 2]]", results.toString());
+ // static partitioned table
+ tableEnv.executeSql("insert overwrite table destp partition(p=1)
select x from src")
Review comment:
when insert overwrite paritioned table with specific partition eg. p =
1, it won't clear the data for the partition.
Is it expected?
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