szehon-ho commented on code in PR #4812:
URL: https://github.com/apache/iceberg/pull/4812#discussion_r920367207
##########
core/src/main/java/org/apache/iceberg/io/DeleteSchemaUtil.java:
##########
@@ -20,13 +20,38 @@
package org.apache.iceberg.io;
import org.apache.iceberg.MetadataColumns;
+import org.apache.iceberg.Partitioning;
import org.apache.iceberg.Schema;
+import org.apache.iceberg.Table;
+import org.apache.iceberg.types.TypeUtil;
import org.apache.iceberg.types.Types;
public class DeleteSchemaUtil {
private DeleteSchemaUtil() {
}
+ public static Schema metadataTableSchema(Table table) {
+ return metadataTableSchema(table, Partitioning.partitionType(table));
+ }
+
+ public static Schema metadataTableSchema(Table table, Types.StructType
partitionType) {
+ Schema result = new Schema(
+ MetadataColumns.DELETE_FILE_PATH,
Review Comment:
Also adding some background: I had tried earlier to use the existing
metadata column for this table (which is populated), but then pushdown does not
work for metadata columns. It seems the pruneSchema() function is called
after filter() function on SparkScanBuilder, so that the binding in filter will
fail.
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