JingsongLi commented on a change in pull request #11405: [FLINK-16413]Reduce
hive source parallelism when limit push down
URL: https://github.com/apache/flink/pull/11405#discussion_r392751442
##########
File path:
flink-connectors/flink-connector-hive/src/test/java/org/apache/flink/connectors/hive/HiveTableSourceTest.java
##########
@@ -410,6 +410,32 @@ public void testParallelismSetting() {
Assert.assertEquals(2, transformation.getParallelism());
}
+ @Test
+ public void testParallelismOnLimitPushDown() {
+ final String catalogName = "hive";
+ final String dbName = "source_db";
+ final String tblName = "test_parallelism_limit_pushdown";
+ hiveShell.execute("CREATE TABLE
source_db.test_parallelism_limit_pushdown " +
+ "(year STRING, value INT) partitioned by (pt
int);");
+ HiveTestUtils.createTextTableInserter(hiveShell, dbName,
tblName)
+ .addRow(new Object[]{"2014", 3})
+ .addRow(new Object[]{"2014", 4})
+ .commit("pt=0");
+ HiveTestUtils.createTextTableInserter(hiveShell, dbName,
tblName)
+ .addRow(new Object[]{"2015", 2})
+ .addRow(new Object[]{"2015", 5})
+ .commit("pt=1");
+ TableEnvironment tEnv =
HiveTestUtils.createTableEnvWithBlinkPlannerBatchMode();
Review comment:
Add this for real test parallelism:
```
tEnv.getConfig().getConfiguration().setBoolean(
HiveOptions.TABLE_EXEC_HIVE_FALLBACK_MAPRED_READER, false);
tEnv.getConfig().getConfiguration().setInteger(
ExecutionConfigOptions.TABLE_EXEC_RESOURCE_DEFAULT_PARALLELISM, 2);
```
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