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#12081: "Add deleteFileThreshold parameter to SizeBasedDataRewriter, update logic, and include tests" #12133

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#12081: "Add deleteFileThreshold parameter to SizeBasedDataRewriter, update logic, and include tests" #12133

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f3ae4d1
Fix SizeBasedDataRewriter constructors and related logic
jangalasriramd7 Jan 29, 2025
f0ea111
Modified the constructor logic by using options
jangalasriramd7 Jan 30, 2025
f0d3c21
Added the testcases
jangalasriramd7 Jan 30, 2025
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9 changes: 6 additions & 3 deletions core/src/main/java/org/apache/iceberg/actions/SizeBasedDataRewriter.java
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Original file line number Diff line number Diff line change
Expand Up @@ -47,12 +47,13 @@ public abstract class SizeBasedDataRewriter extends SizeBasedFileRewriter<FileSc
public static final String DELETE_FILE_THRESHOLD = "delete-file-threshold";

public static final int DELETE_FILE_THRESHOLD_DEFAULT = Integer.MAX_VALUE;
private static final double DELETE_RATIO_THRESHOLD = 0.3;
private static final double DEFAULT_DELETE_THRESHOLD = 0.3;

private int deleteFileThreshold;

protected SizeBasedDataRewriter(Table table) {
super(table);
// Default constructor
public SizeBasedDataRewriter(Table table) {
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this(table); // Providing default deleteRatioThreshold
}

@Override
Expand All @@ -67,6 +68,8 @@ public Set<String> validOptions() {
public void init(Map<String, String> options) {
super.init(options);
this.deleteFileThreshold = deleteFileThreshold(options);
this.deleteRatioThreshold = PropertyUtil.propertyAsDouble(
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we also need to validate that 0.0 > threshold <= 1.0. That would also require some additional unit tests that check for valid/invalid parameters

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also this.deleteRatioThreshold needs to be used in tooHighDeleteRatio()

options, "delete-ratio-threshold", DEFAULT_DELETE_THRESHOLD);
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}

@Override
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21 changes: 21 additions & 0 deletions core/src/test/java/org/apache/iceberg/actions/TestSizeBasedRewriter.java
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Expand Up @@ -76,6 +76,27 @@ public void testSplitSizeLowerBound() {
assertThat(splitSize).isLessThan(maxFileSize);
}

@TestTemplate
public void testDeleteFileThresholdOption() {
SizeBasedDataFileRewriterImpl rewriter = new SizeBasedDataFileRewriterImpl(table);

Map<String, String> options = ImmutableMap.of(
SizeBasedDataRewriter.DELETE_FILE_THRESHOLD, "5"
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);
rewriter.init(options);

assertThat(rewriter.getDeleteFileThreshold()).isEqualTo(5);
}

@TestTemplate
public void testHighDeleteRatioTriggersRewrite() {
SizeBasedDataFileRewriterImpl rewriter = new SizeBasedDataFileRewriterImpl(table);

FileScanTask task = new MockFileScanTask(100L * 1024 * 1024, 80); // 80% delete ratio

assertThat(rewriter.tooHighDeleteRatio(task)).isTrue();
}

private static class SizeBasedDataFileRewriterImpl extends SizeBasedDataRewriter {

SizeBasedDataFileRewriterImpl(Table table) {
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