Short circuit page source creation in Hive

trinodb · Oct 9, 2019 · 4a362be · 4a362be
1 parent 4514c6f
commit 4a362be
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/presto-hive/src/main/java/io/prestosql/plugin/hive/HivePageSourceProvider.java b/presto-hive/src/main/java/io/prestosql/plugin/hive/HivePageSourceProvider.java
@@ -24,6 +24,7 @@
 import io.prestosql.spi.connector.ConnectorSplit;
 import io.prestosql.spi.connector.ConnectorTableHandle;
 import io.prestosql.spi.connector.ConnectorTransactionHandle;
+import io.prestosql.spi.connector.FixedPageSource;
 import io.prestosql.spi.connector.RecordCursor;
 import io.prestosql.spi.connector.RecordPageSource;
 import io.prestosql.spi.predicate.TupleDomain;
@@ -148,6 +149,10 @@ public static Optional<ConnectorPageSource> createHivePageSource(
             Optional<BucketConversion> bucketConversion,
             boolean s3SelectPushdownEnabled)
     {
+        if (effectivePredicate.isNone()) {
+            return Optional.of(new FixedPageSource(ImmutableList.of()));
+        }
+
         List<ColumnMapping> columnMappings = ColumnMapping.buildColumnMappings(
                 partitionKeys,
                 hiveColumns,