rdblue commented on code in PR #18604:
URL: https://github.com/apache/iceberg/pull/18604#discussion_r4462236439
##########
core/src/test/java/org/apache/iceberg/TestStatsUtil.java:
##########
@@ -564,6 +572,293 @@ public void testContentStatsWriteSchemaOmitsListAndMap() {
assertThat(actual.fields()).isEmpty();
}
+ @Test
+ void identityBounds() {
+ assertThat(sourceBounds(Types.StringType.get(), Transforms.identity(),
"books"))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>("books", "books"));
+ }
+
+ @Test
+ void identityNaN() {
+ assertThat(sourceBounds(Types.FloatType.get(), Transforms.identity(),
Float.NaN)).isNull();
+ assertThat(sourceBounds(Types.DoubleType.get(), Transforms.identity(),
Double.NaN)).isNull();
+ }
+
+ private static Stream<Partition> truncatedNumbers() {
+ Type decimal = Types.DecimalType.of(9, 2);
+ return Stream.of(
+ partition(Types.IntegerType.get(), Transforms.truncate(10),
20).withExpectedBounds(20, 29),
+ partition(Types.IntegerType.get(), Transforms.truncate(10), -10)
+ .withExpectedBounds(-10, -1),
+ partition(Types.LongType.get(), Transforms.truncate(100), 12_300L)
+ .withExpectedBounds(12_300L, 12_399L),
+ partition(decimal, Transforms.truncate(50), new BigDecimal("12.00"))
+ .withExpectedBounds(new BigDecimal("12.00"), new
BigDecimal("12.49")),
+ partition(decimal, Transforms.truncate(50), new BigDecimal("-0.50"))
+ .withExpectedBounds(new BigDecimal("-0.50"), new
BigDecimal("-0.01")));
+ }
+
+ @ParameterizedTest
+ @MethodSource("truncatedNumbers")
+ void truncateNumberBounds(Partition partition) {
+ assertThat(sourceBounds(partition)).isEqualTo(partition.expected());
+ }
+
+ @Test
+ void truncateNumberNearMax() {
+ assertThat(sourceBounds(Types.IntegerType.get(), Transforms.truncate(10),
2_147_483_640))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>(2_147_483_640,
Integer.MAX_VALUE));
+ assertThat(sourceBounds(Types.LongType.get(), Transforms.truncate(100),
Long.MAX_VALUE - 7))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>(Long.MAX_VALUE - 7,
Long.MAX_VALUE));
+ assertThat(
+ sourceBounds(
+ Types.DecimalType.of(9, 2), Transforms.truncate(7), new
BigDecimal("9999999.94")))
+ .isEqualTo(
+ new StatsUtil.PartitionSourceBounds<>(
+ new BigDecimal("9999999.94"), new BigDecimal("9999999.99")));
+ }
+
+ @Test
+ void truncateNumberAtMinWraps() {
+ assertThat(sourceBounds(Types.IntegerType.get(), Transforms.truncate(10),
2_147_483_646))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>(Integer.MIN_VALUE,
Integer.MIN_VALUE + 7));
+ assertThat(
+ sourceBounds(Types.LongType.get(), Transforms.truncate(10),
9_223_372_036_854_775_806L))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>(Long.MIN_VALUE,
Long.MIN_VALUE + 7));
+ }
+
+ @Test
+ void truncateNumberAtMinWithPowerOfTwoWidth() {
+ assertThat(sourceBounds(Types.IntegerType.get(), Transforms.truncate(8),
Integer.MIN_VALUE))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>(Integer.MIN_VALUE,
Integer.MIN_VALUE + 7));
+ assertThat(sourceBounds(Types.LongType.get(), Transforms.truncate(8),
Long.MIN_VALUE))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>(Long.MIN_VALUE,
Long.MIN_VALUE + 7));
+ }
+
+ @Test
+ void truncateStringBounds() {
+ assertThat(sourceBounds(Types.StringType.get(), Transforms.truncate(3),
"abc"))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>("abc", "abd"));
+ }
+
+ @Test
+ void truncateShortString() {
+ assertThat(sourceBounds(Types.StringType.get(), Transforms.truncate(3),
"ab"))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>("ab", "ab"));
+ }
+
+ @Test
+ void truncateShortStringWithSurrogatePair() {
+ String value = "ab" + new String(Character.toChars(0x1F4B0));
+
+ assertThat(sourceBounds(Types.StringType.get(), Transforms.truncate(4),
value))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>(value, value));
+ }
+
+ @Test
+ void truncateStringAtMaxCodePoint() {
+ String maxCodePoint = new
String(Character.toChars(Character.MAX_CODE_POINT));
+
+ assertThat(sourceBounds(Types.StringType.get(), Transforms.truncate(1),
maxCodePoint))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>(maxCodePoint, null));
+ }
+
+ @Test
+ void truncateBinaryBounds() {
+ ByteBuffer prefix = ByteBuffer.wrap(new byte[] {1, 2});
+
+ assertThat(sourceBounds(Types.BinaryType.get(), Transforms.truncate(2),
prefix))
+ .isEqualTo(
+ new StatsUtil.PartitionSourceBounds<>(prefix, ByteBuffer.wrap(new
byte[] {1, 3})));
+ }
+
+ @Test
+ void truncateShortBinary() {
+ ByteBuffer value = ByteBuffer.wrap(new byte[] {1});
+
+ assertThat(sourceBounds(Types.BinaryType.get(), Transforms.truncate(2),
value))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>(value, value));
+ }
+
+ @ParameterizedTest
+ @ValueSource(strings = {"identity", "truncate[2]"})
+ void binaryBoundsDoNotSharePosition(String transform) {
+ StatsUtil.PartitionSourceBounds<?> bounds =
+ sourceBounds(
+ Types.BinaryType.get(),
+ Transforms.fromString(transform),
+ ByteBuffer.wrap(new byte[] {1}));
+
+ ((ByteBuffer) bounds.lower()).get();
+
+ assertThat((ByteBuffer) bounds.upper()).isEqualTo(ByteBuffer.wrap(new
byte[] {1}));
+ }
+
+ @Test
+ void truncateBinaryAtMaxBytes() {
+ ByteBuffer prefix = ByteBuffer.wrap(new byte[] {(byte) 0xFF, (byte) 0xFF});
+
+ assertThat(sourceBounds(Types.BinaryType.get(), Transforms.truncate(2),
prefix))
+ .isEqualTo(new StatsUtil.PartitionSourceBounds<>(prefix, null));
+ }
+
+ private static Stream<Partition> timePartitionValues() {
+ Type date = Types.DateType.get();
+ Type timestamp = Types.TimestampType.withZone();
+ Type timestampNano = Types.TimestampNanoType.withZone();
+ return Stream.of(
+ partition(date, Transforms.year(), years("2023-01-01"))
+ .withExpectedBounds(days("2023-01-01"), days("2023-12-31")),
+ partition(date, Transforms.month(), months("2023-02-01"))
+ .withExpectedBounds(days("2023-02-01"), days("2023-02-28")),
+ partition(date, Transforms.day(), days("2023-02-10"))
+ .withExpectedBounds(days("2023-02-10"), days("2023-02-10")),
+ partition(timestamp, Transforms.year(), years("2023-01-01"))
+ .withExpectedBounds(
+ micros("2023-01-01T00:00:00Z"),
micros("2023-12-31T23:59:59.999999Z")),
+ partition(timestamp, Transforms.month(), months("2023-02-01"))
+ .withExpectedBounds(
+ micros("2023-02-01T00:00:00Z"),
micros("2023-02-28T23:59:59.999999Z")),
+ partition(timestamp, Transforms.day(), days("2023-02-10"))
+ .withExpectedBounds(
+ micros("2023-02-10T00:00:00Z"),
micros("2023-02-10T23:59:59.999999Z")),
+ partition(timestamp, Transforms.hour(), hours("2023-02-10T05:00:00Z"))
+ .withExpectedBounds(
+ micros("2023-02-10T05:00:00Z"),
micros("2023-02-10T05:59:59.999999Z")),
+ partition(timestampNano, Transforms.hour(),
hours("2023-02-10T05:00:00Z"))
+ .withExpectedBounds(
+ nanos("2023-02-10T05:00:00Z"),
nanos("2023-02-10T05:59:59.999999999Z")));
+ }
+
+ @ParameterizedTest
+ @MethodSource("timePartitionValues")
+ void timeBounds(Partition partition) {
+ assertThat(sourceBounds(partition)).isEqualTo(partition.expected());
+ }
+
+ private static Stream<Partition> timePartitionValuesAtOrBefore1970() {
+ Type timestamp = Types.TimestampType.withZone();
+ return Stream.of(
+ partition(timestamp, Transforms.year(), 0)
+ .withExpectedBounds(
+ micros("1969-01-01T00:00:00Z"),
micros("1970-12-31T23:59:59.999999Z")),
+ partition(timestamp, Transforms.hour(), -1)
+ .withExpectedBounds(
+ micros("1969-12-31T22:00:00Z"),
micros("1969-12-31T23:59:59.999999Z")),
+ partition(timestamp, Transforms.day(), -1)
+ .withExpectedBounds(
+ micros("1969-12-30T00:00:00Z"),
micros("1969-12-31T23:59:59.999999Z")),
+ partition(Types.DateType.get(), Transforms.month(), -1)
+ .withExpectedBounds(days("1969-11-01"), days("1969-12-31")),
+ partition(Types.DateType.get(), Transforms.day(), -1)
+ .withExpectedBounds(days("1969-12-31"), days("1969-12-31")));
+ }
+
+ @ParameterizedTest
+ @MethodSource("timePartitionValuesAtOrBefore1970")
+ void timeBoundsAtOrBefore1970(Partition partition) {
+ assertThat(sourceBounds(partition)).isEqualTo(partition.expected());
+ }
+
+ @Test
+ void dateBoundsNearMax() {
Review Comment:
Don't care!
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