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https://issues.apache.org/jira/browse/DRILL-4083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15004879#comment-15004879
]
ASF GitHub Bot commented on DRILL-4083:
---------------------------------------
Github user jinfengni commented on a diff in the pull request:
https://github.com/apache/drill/pull/253#discussion_r44845244
--- Diff:
contrib/storage-hive/core/src/test/java/org/apache/drill/exec/hive/TestHiveStorage.java
---
@@ -36,6 +36,19 @@ public static void setupOptions() throws Exception {
test(String.format("alter session set `%s` = true",
PlannerSettings.ENABLE_DECIMAL_DATA_TYPE_KEY));
}
+
+ @Test // DRILL-4083
+ public void testNativeScanWhenNoColumnIsRead() throws Exception {
+ try {
+ test(String.format("alter session set `%s` = true",
ExecConstants.HIVE_OPTIMIZE_SCAN_WITH_NATIVE_READERS));
+
+ String query = "SELECT count(*) FROM hive.readtest_parquet";
+ testPhysicalPlan(query, "hive-drill-native-parquet-scan");
+ } finally {
+ test(String.format("alter session set `%s` = false",
ExecConstants.HIVE_OPTIMIZE_SCAN_WITH_NATIVE_READERS));
--- End diff --
Will it make sense to change it back to default value in the finally block
(in case we change the default value for this option in future release)?
> Drill not using HiveDrillNativeParquetScan if no column is needed to be read
> from HIVE
> --------------------------------------------------------------------------------------
>
> Key: DRILL-4083
> URL: https://issues.apache.org/jira/browse/DRILL-4083
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - Hive
> Reporter: Sean Hsuan-Yi Chu
> Assignee: Sean Hsuan-Yi Chu
>
> For example, for a query such as:
> {code}
> Select count(*) from hive.parquetTable
> {code}
> would not use HiveDrillNativeParquetScan. However, the following query will
> use:
> {code}
> Select count(*) from hive.parquetTable where column > 0
> {code}
> Ideally, both should use the same HiveDrillNativeParquetScan
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