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Core: Minor refactoring of PartitionsTable #6975

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jackye1995 merged 3 commits into from
Mar 21, 2023
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Core: Minor refactoring of PartitionsTable #6975

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de3774c
Core: Minor refactoring of PartitionsTable
ajantha-bhat Mar 1, 2023
66f0836
reword column docs
ajantha-bhat Mar 2, 2023
039dea2
Update case for docs
ajantha-bhat Mar 6, 2023
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24 changes: 13 additions & 11 deletions core/src/main/java/org/apache/iceberg/PartitionsTable.java
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Original file line number Diff line number Diff line change
Expand Up @@ -45,9 +45,11 @@ public class PartitionsTable extends BaseMetadataTable {
this.schema =
new Schema(
Types.NestedField.required(1, "partition", Partitioning.partitionType(table)),
Types.NestedField.required(2, "record_count", Types.LongType.get()),
Types.NestedField.required(3, "file_count", Types.IntegerType.get()),
Types.NestedField.required(4, "spec_id", Types.IntegerType.get()));
Types.NestedField.required(4, "spec_id", Types.IntegerType.get()),
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@jackye1995 jackye1995 Mar 2, 2023

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I am not sure about the column order, it feels odd to me to have IDs in 1,4,2,3 order. But that's just personal preference.

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@ajantha-bhat ajantha-bhat Mar 2, 2023 •
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we have discussed this here
#6661 (comment)

I think @RussellSpitzer and @szehon-ho agree that there is no impact from column re-ordering.
Spec-id in the middle really looks odd when we add other counters. I don't want to change the field id and break the compatibility.

Types.NestedField.required(
2, "record_count", Types.LongType.get(), "Count of records in data files"),
Types.NestedField.required(
3, "file_count", Types.IntegerType.get(), "Count of data files"));
}

@Override
Expand Down Expand Up @@ -77,7 +79,7 @@ private DataTask task(StaticTableScan scan) {
schema(),
scan.schema(),
partitions,
root -> StaticDataTask.Row.of(root.recordCount, root.fileCount));
root -> StaticDataTask.Row.of(root.dataRecordCount, root.dataFileCount));
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@rdblue rdblue Mar 5, 2023

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I don't see much value in these renames, but it's okay with me.

} else {
return StaticDataTask.of(
io().newInputFile(table().operations().current().metadataFileLocation()),
Expand All @@ -90,7 +92,7 @@ private DataTask task(StaticTableScan scan) {

private static StaticDataTask.Row convertPartition(Partition partition) {
return StaticDataTask.Row.of(
partition.key, partition.recordCount, partition.fileCount, partition.specId);
partition.key, partition.specId, partition.dataRecordCount, partition.dataFileCount);
}

private static Iterable<Partition> partitions(Table table, StaticTableScan scan) {
Expand Down Expand Up @@ -220,20 +222,20 @@ Iterable<Partition> all() {

static class Partition {
private final StructLike key;
private long recordCount;
private int fileCount;
private int specId;
private long dataRecordCount;
private int dataFileCount;

Partition(StructLike key) {
this.key = key;
this.recordCount = 0;
this.fileCount = 0;
this.specId = 0;
this.dataRecordCount = 0;
this.dataFileCount = 0;
}

void update(DataFile file) {
this.recordCount += file.recordCount();
this.fileCount += 1;
this.dataRecordCount += file.recordCount();
this.dataFileCount += 1;
this.specId = file.specId();
}
}
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3 changes: 2 additions & 1 deletion core/src/test/java/org/apache/iceberg/TestMetadataTableScans.java
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Expand Up @@ -332,7 +332,8 @@ public void testPartitionsTableScanWithProjection() {

Table partitionsTable = new PartitionsTable(table);
Types.StructType expected =
new Schema(required(3, "file_count", Types.IntegerType.get())).asStruct();
new Schema(required(3, "file_count", Types.IntegerType.get(), "Count of data files"))
.asStruct();

TableScan scanWithProjection = partitionsTable.newScan().select("file_count");
Assert.assertEquals(expected, scanWithProjection.schema().asStruct());
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4 changes: 2 additions & 2 deletions ...v2.4/spark/src/test/java/org/apache/iceberg/spark/source/TestIcebergSourceTablesBase.java
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Expand Up @@ -1234,8 +1234,8 @@ public void testUnpartitionedPartitionsTable() {

Types.StructType expectedSchema =
Types.StructType.of(
required(2, "record_count", Types.LongType.get()),
required(3, "file_count", Types.IntegerType.get()));
required(2, "record_count", Types.LongType.get(), "Count of records in data files"),
required(3, "file_count", Types.IntegerType.get(), "Count of data files"));

Table partitionsTable = loadTable(tableIdentifier, "partitions");

Expand Down
4 changes: 2 additions & 2 deletions ...v3.1/spark/src/test/java/org/apache/iceberg/spark/source/TestIcebergSourceTablesBase.java
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Expand Up @@ -1232,8 +1232,8 @@ public void testUnpartitionedPartitionsTable() {

Types.StructType expectedSchema =
Types.StructType.of(
required(2, "record_count", Types.LongType.get()),
required(3, "file_count", Types.IntegerType.get()));
required(2, "record_count", Types.LongType.get(), "Count of records in data files"),
required(3, "file_count", Types.IntegerType.get(), "Count of data files"));

Table partitionsTable = loadTable(tableIdentifier, "partitions");

Expand Down
4 changes: 2 additions & 2 deletions ...v3.2/spark/src/test/java/org/apache/iceberg/spark/source/TestIcebergSourceTablesBase.java
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Expand Up @@ -1249,8 +1249,8 @@ public void testUnpartitionedPartitionsTable() {

Types.StructType expectedSchema =
Types.StructType.of(
required(2, "record_count", Types.LongType.get()),
required(3, "file_count", Types.IntegerType.get()));
required(2, "record_count", Types.LongType.get(), "Count of records in data files"),
required(3, "file_count", Types.IntegerType.get(), "Count of data files"));

Table partitionsTable = loadTable(tableIdentifier, "partitions");

Expand Down
4 changes: 2 additions & 2 deletions ...v3.3/spark/src/test/java/org/apache/iceberg/spark/source/TestIcebergSourceTablesBase.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1252,8 +1252,8 @@ public void testUnpartitionedPartitionsTable() {

Types.StructType expectedSchema =
Types.StructType.of(
required(2, "record_count", Types.LongType.get()),
required(3, "file_count", Types.IntegerType.get()));
required(2, "record_count", Types.LongType.get(), "Count of records in data files"),
required(3, "file_count", Types.IntegerType.get(), "Count of data files"));

Table partitionsTable = loadTable(tableIdentifier, "partitions");

Expand Down