difin commented on code in PR #6789:
URL: https://github.com/apache/hive/pull/6789#discussion_r4202300333
##########
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/HiveTableUtil.java:
##########
@@ -259,6 +262,57 @@ public static Table deserializeTable(Configuration config,
String name) {
return table;
}
+ /**
+ * Resolves the Iceberg {@link Table} for split generation ({@code
IcebergInputFormat#getSplits}).
+ *
+ * <p>Serialized tables ({@link SerializableTable}) only carry a metadata
snapshot and produce
+ * {@link org.apache.iceberg.DataTableScan} (client-side manifest planning).
When REST catalog
+ * server-side scan planning is enabled, reload the live table from the
catalog so
+ * {@code table.newScan()} returns {@link
org.apache.iceberg.rest.RESTTableScan} and issues
+ * {@code POST /plan} on the REST server.
+ *
+ * <p>Intra-transaction read-after-write ({@link
InputFormatConfig#TABLE_METADATA_LOCATION}) still
+ * uses the deserialized snapshot so uncommitted metadata is visible.
+ */
+ public static Table resolveTableForScanPlanning(Configuration conf, String
tableIdentifier) {
+ if (shouldReloadForServerSideScanPlanning(conf)) {
Review Comment:
Reload here means `Catalogs.loadTable` instead of the serialized
`SerializableTable`, so we get a live `RESTTable` for POST /plan, only in
`getSplits` when REST + server scan mode are on (skipped for intra-txn
TABLE_METADATA_LOCATION). It’s extra REST metadata cost vs deserialize, but it
runs at split-planning time, not per task/row; multiple scans of the same table
in one query can each hit `loadTable` once.
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