szehon-ho commented on code in PR #7029:
URL: https://github.com/apache/iceberg/pull/7029#discussion_r1152765877


##########
spark/v3.3/spark/src/main/java/org/apache/iceberg/spark/source/SparkPositionDeletesRewriteBuilder.java:
##########
@@ -0,0 +1,91 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.iceberg.spark.source;
+
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+import org.apache.iceberg.PositionDeletesScanTask;
+import org.apache.iceberg.Schema;
+import org.apache.iceberg.StructLike;
+import org.apache.iceberg.Table;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+import org.apache.iceberg.spark.ScanTaskSetManager;
+import org.apache.iceberg.spark.SparkSchemaUtil;
+import org.apache.iceberg.spark.SparkWriteConf;
+import org.apache.spark.sql.SparkSession;
+import org.apache.spark.sql.connector.write.LogicalWriteInfo;
+import org.apache.spark.sql.connector.write.Write;
+import org.apache.spark.sql.connector.write.WriteBuilder;
+import org.apache.spark.sql.types.StructType;
+
+/**
+ * Builder class for rewrites of position delete files from Spark. Responsible 
for creating {@link
+ * SparkPositionDeletesRewrite}.
+ *
+ * <p>This class is meant to be used for an action to rewrite delete files. 
Hence, it makes an
+ * assumption that all incoming deletes belong to the same partition, and that 
incoming dataset is
+ * from {@link ScanTaskSetManager}.
+ */
+public class SparkPositionDeletesRewriteBuilder implements WriteBuilder {
+
+  private final SparkSession spark;
+  private final Table table;
+  private final SparkWriteConf writeConf;
+  private final LogicalWriteInfo writeInfo;
+  private final StructType dsSchema;
+  private final Schema writeSchema;
+
+  SparkPositionDeletesRewriteBuilder(
+      SparkSession spark, Table table, String branch, LogicalWriteInfo info) {
+    this.spark = spark;
+    this.table = table;
+    this.writeConf = new SparkWriteConf(spark, table, branch, info.options());
+    this.writeInfo = info;
+    this.dsSchema = info.schema();
+    this.writeSchema = SparkSchemaUtil.convert(table.schema(), dsSchema, 
writeConf.caseSensitive());
+  }
+
+  @Override
+  public Write build() {
+    Preconditions.checkArgument(
+        writeConf.rewrittenFileSetId() != null,
+        "position_deletes table can only be written by RewriteDeleteFiles");
+
+    // all files of rewrite group have same and partition and spec id
+    ScanTaskSetManager scanTaskSetManager = ScanTaskSetManager.get();
+    String fileSetId = writeConf.rewrittenFileSetId();
+    List<PositionDeletesScanTask> scanTasks = 
scanTaskSetManager.fetchTasks(table, fileSetId);
+    Preconditions.checkNotNull(scanTasks, "no scan tasks found for %s", 
fileSetId);
+
+    Set<Integer> specIds =
+        scanTasks.stream().map(t -> 
t.spec().specId()).collect(Collectors.toSet());
+    Set<StructLike> partitions =

Review Comment:
   Did, though its a bit more code now to get the type to make the structLikeSet



##########
spark/v3.3/spark/src/main/java/org/apache/iceberg/spark/source/SparkPositionDeletesRewriteBuilder.java:
##########
@@ -0,0 +1,91 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.iceberg.spark.source;
+
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+import org.apache.iceberg.PositionDeletesScanTask;
+import org.apache.iceberg.Schema;
+import org.apache.iceberg.StructLike;
+import org.apache.iceberg.Table;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+import org.apache.iceberg.spark.ScanTaskSetManager;
+import org.apache.iceberg.spark.SparkSchemaUtil;
+import org.apache.iceberg.spark.SparkWriteConf;
+import org.apache.spark.sql.SparkSession;
+import org.apache.spark.sql.connector.write.LogicalWriteInfo;
+import org.apache.spark.sql.connector.write.Write;
+import org.apache.spark.sql.connector.write.WriteBuilder;
+import org.apache.spark.sql.types.StructType;
+
+/**
+ * Builder class for rewrites of position delete files from Spark. Responsible 
for creating {@link
+ * SparkPositionDeletesRewrite}.
+ *
+ * <p>This class is meant to be used for an action to rewrite delete files. 
Hence, it makes an
+ * assumption that all incoming deletes belong to the same partition, and that 
incoming dataset is
+ * from {@link ScanTaskSetManager}.
+ */
+public class SparkPositionDeletesRewriteBuilder implements WriteBuilder {
+
+  private final SparkSession spark;
+  private final Table table;
+  private final SparkWriteConf writeConf;
+  private final LogicalWriteInfo writeInfo;
+  private final StructType dsSchema;
+  private final Schema writeSchema;
+
+  SparkPositionDeletesRewriteBuilder(
+      SparkSession spark, Table table, String branch, LogicalWriteInfo info) {
+    this.spark = spark;
+    this.table = table;
+    this.writeConf = new SparkWriteConf(spark, table, branch, info.options());
+    this.writeInfo = info;
+    this.dsSchema = info.schema();
+    this.writeSchema = SparkSchemaUtil.convert(table.schema(), dsSchema, 
writeConf.caseSensitive());
+  }
+
+  @Override
+  public Write build() {
+    Preconditions.checkArgument(
+        writeConf.rewrittenFileSetId() != null,
+        "position_deletes table can only be written by RewriteDeleteFiles");
+
+    // all files of rewrite group have same and partition and spec id
+    ScanTaskSetManager scanTaskSetManager = ScanTaskSetManager.get();
+    String fileSetId = writeConf.rewrittenFileSetId();
+    List<PositionDeletesScanTask> scanTasks = 
scanTaskSetManager.fetchTasks(table, fileSetId);
+    Preconditions.checkNotNull(scanTasks, "no scan tasks found for %s", 
fileSetId);
+
+    Set<Integer> specIds =
+        scanTasks.stream().map(t -> 
t.spec().specId()).collect(Collectors.toSet());
+    Set<StructLike> partitions =
+        scanTasks.stream().map(t -> 
t.file().partition()).collect(Collectors.toSet());
+    Preconditions.checkArgument(
+        specIds.size() == 1, "All scan tasks of %s are expected to have same 
spec id", fileSetId);
+    Preconditions.checkArgument(
+        partitions.size() == 1, "All scan tasks of %s are expected to have the 
same partition");
+    int specId = scanTasks.get(0).spec().specId();

Review Comment:
   Done



##########
spark/v3.3/spark/src/main/java/org/apache/iceberg/spark/source/SparkPositionDeletesRewriteBuilder.java:
##########
@@ -0,0 +1,91 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.iceberg.spark.source;
+
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+import org.apache.iceberg.PositionDeletesScanTask;
+import org.apache.iceberg.Schema;
+import org.apache.iceberg.StructLike;
+import org.apache.iceberg.Table;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+import org.apache.iceberg.spark.ScanTaskSetManager;
+import org.apache.iceberg.spark.SparkSchemaUtil;
+import org.apache.iceberg.spark.SparkWriteConf;
+import org.apache.spark.sql.SparkSession;
+import org.apache.spark.sql.connector.write.LogicalWriteInfo;
+import org.apache.spark.sql.connector.write.Write;
+import org.apache.spark.sql.connector.write.WriteBuilder;
+import org.apache.spark.sql.types.StructType;
+
+/**
+ * Builder class for rewrites of position delete files from Spark. Responsible 
for creating {@link
+ * SparkPositionDeletesRewrite}.
+ *
+ * <p>This class is meant to be used for an action to rewrite delete files. 
Hence, it makes an
+ * assumption that all incoming deletes belong to the same partition, and that 
incoming dataset is
+ * from {@link ScanTaskSetManager}.
+ */
+public class SparkPositionDeletesRewriteBuilder implements WriteBuilder {
+
+  private final SparkSession spark;
+  private final Table table;
+  private final SparkWriteConf writeConf;
+  private final LogicalWriteInfo writeInfo;
+  private final StructType dsSchema;
+  private final Schema writeSchema;
+
+  SparkPositionDeletesRewriteBuilder(
+      SparkSession spark, Table table, String branch, LogicalWriteInfo info) {
+    this.spark = spark;
+    this.table = table;
+    this.writeConf = new SparkWriteConf(spark, table, branch, info.options());
+    this.writeInfo = info;
+    this.dsSchema = info.schema();
+    this.writeSchema = SparkSchemaUtil.convert(table.schema(), dsSchema, 
writeConf.caseSensitive());
+  }
+
+  @Override
+  public Write build() {
+    Preconditions.checkArgument(
+        writeConf.rewrittenFileSetId() != null,
+        "position_deletes table can only be written by RewriteDeleteFiles");
+
+    // all files of rewrite group have same and partition and spec id
+    ScanTaskSetManager scanTaskSetManager = ScanTaskSetManager.get();
+    String fileSetId = writeConf.rewrittenFileSetId();
+    List<PositionDeletesScanTask> scanTasks = 
scanTaskSetManager.fetchTasks(table, fileSetId);
+    Preconditions.checkNotNull(scanTasks, "no scan tasks found for %s", 
fileSetId);
+
+    Set<Integer> specIds =
+        scanTasks.stream().map(t -> 
t.spec().specId()).collect(Collectors.toSet());
+    Set<StructLike> partitions =
+        scanTasks.stream().map(t -> 
t.file().partition()).collect(Collectors.toSet());
+    Preconditions.checkArgument(
+        specIds.size() == 1, "All scan tasks of %s are expected to have same 
spec id", fileSetId);

Review Comment:
   Done



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