rdblue commented on a change in pull request #1495:
URL: https://github.com/apache/iceberg/pull/1495#discussion_r497789557
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File path: mr/src/main/java/org/apache/iceberg/mr/hive/HiveIcebergSerDe.java
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@@ -27,21 +27,41 @@
import org.apache.hadoop.hive.serde2.SerDeStats;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.io.Writable;
-import org.apache.iceberg.Table;
+import org.apache.iceberg.Schema;
+import org.apache.iceberg.SchemaParser;
+import org.apache.iceberg.exceptions.NoSuchTableException;
import org.apache.iceberg.mr.Catalogs;
+import org.apache.iceberg.mr.InputFormatConfig;
import org.apache.iceberg.mr.hive.serde.objectinspector.IcebergObjectInspector;
import org.apache.iceberg.mr.mapred.Container;
public class HiveIcebergSerDe extends AbstractSerDe {
-
+ private Schema schema;
private ObjectInspector inspector;
@Override
public void initialize(@Nullable Configuration configuration, Properties
serDeProperties) throws SerDeException {
- Table table = Catalogs.loadTable(configuration, serDeProperties);
-
try {
- this.inspector = IcebergObjectInspector.create(table.schema());
+ // HiveIcebergSerDe.initialize is called multiple places in Hive code:
+ // - When we are trying to create a table - HiveDDL data is stored at
the serDeProperties, but no Iceberg table
+ // is created yet.
+ // - When we are compiling the Hive query on HiveServer2 side - We only
have table information (location/name),
+ // and we have to read the schema using the table data. This is called
multiple times so there is room for
+ // optimizing here.
Review comment:
`SchemaParser` has a cache, so that should help some.
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