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GH-655: Failure in UnionReader.read after DecimalVector promotion to UnionVector #656

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Merged
merged 5 commits into from
Mar 13, 2025
Merged

GH-655: Failure in UnionReader.read after DecimalVector promotion to UnionVector #656

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549f52e
DX-85876: Failure in UnionReader.read after DecimalVector promotion t…
sgcowell Jan 10, 2024
69d8bd0
Fix jar build
lriggs Mar 14, 2024
7d5e3ce
Fix typo.
lriggs Mar 12, 2025
85a44d8
Merge remote-tracking branch 'upstream/main' into fixTemplate
lriggs Mar 12, 2025
766ba3a
Run spotless
lriggs Mar 12, 2025
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6 changes: 5 additions & 1 deletion vector/src/main/codegen/templates/UnionVector.java
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@
import org.apache.arrow.util.Preconditions;
import org.apache.arrow.vector.BaseValueVector;
import org.apache.arrow.vector.BitVectorHelper;
import org.apache.arrow.vector.DecimalVector;
import org.apache.arrow.vector.FieldVector;
import org.apache.arrow.vector.ValueVector;
import org.apache.arrow.vector.complex.AbstractStructVector;
Expand Down Expand Up @@ -279,7 +280,10 @@ public StructVector getStruct() {
<#if minor.class?starts_with("Decimal") || is_timestamp_tz(minor.class) || minor.class == "Duration" || minor.class == "FixedSizeBinary">
public ${name}Vector get${name}Vector() {
if (${uncappedName}Vector == null) {
throw new IllegalArgumentException("No ${name} present. Provide ArrowType argument to create a new vector");
${uncappedName}Vector = internalStruct.getChild(fieldName(MinorType.${name?upper_case}), ${name}Vector.class);
if (${uncappedName}Vector == null) {
throw new IllegalArgumentException("No ${name} present. Provide ArrowType argument to create a new vector");
}
}
return ${uncappedName}Vector;
}
Expand Down
47 changes: 47 additions & 0 deletions vector/src/test/java/org/apache/arrow/vector/complex/impl/TestPromotableWriter.java
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Expand Up @@ -21,12 +21,14 @@
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;

import java.math.BigDecimal;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.charset.StandardCharsets;
import java.util.Objects;
import org.apache.arrow.memory.ArrowBuf;
import org.apache.arrow.memory.BufferAllocator;
import org.apache.arrow.vector.DecimalVector;
import org.apache.arrow.vector.DirtyRootAllocator;
import org.apache.arrow.vector.LargeVarBinaryVector;
import org.apache.arrow.vector.LargeVarCharVector;
Expand All @@ -39,14 +41,18 @@
import org.apache.arrow.vector.complex.writer.BaseWriter.StructWriter;
import org.apache.arrow.vector.holders.DurationHolder;
import org.apache.arrow.vector.holders.FixedSizeBinaryHolder;
import org.apache.arrow.vector.holders.NullableDecimalHolder;
import org.apache.arrow.vector.holders.NullableIntHolder;
import org.apache.arrow.vector.holders.NullableTimeStampMilliTZHolder;
import org.apache.arrow.vector.holders.TimeStampMilliTZHolder;
import org.apache.arrow.vector.holders.UnionHolder;
import org.apache.arrow.vector.types.TimeUnit;
import org.apache.arrow.vector.types.Types;
import org.apache.arrow.vector.types.pojo.ArrowType;
import org.apache.arrow.vector.types.pojo.ArrowType.ArrowTypeID;
import org.apache.arrow.vector.types.pojo.Field;
import org.apache.arrow.vector.types.pojo.FieldType;
import org.apache.arrow.vector.util.DecimalUtility;
import org.apache.arrow.vector.util.Text;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
Expand Down Expand Up @@ -729,4 +735,45 @@ public void testPromoteLargeVarBinaryHelpersDirect() throws Exception {
assertEquals("row4", new String(Objects.requireNonNull(uv.get(3)), StandardCharsets.UTF_8));
}
}

@Test
public void testPromoteToUnionFromDecimal() throws Exception {
try (final NonNullableStructVector container =
NonNullableStructVector.empty(EMPTY_SCHEMA_PATH, allocator);
final DecimalVector v =
container.addOrGet(
"dec", FieldType.nullable(new ArrowType.Decimal(38, 1, 128)), DecimalVector.class);
final PromotableWriter writer = new PromotableWriter(v, container)) {

container.allocateNew();
container.setValueCount(1);

writer.setPosition(0);
writer.writeDecimal(new BigDecimal("0.1"));
writer.setPosition(1);
writer.writeInt(1);

container.setValueCount(3);

UnionVector unionVector = (UnionVector) container.getChild("dec");
UnionHolder holder = new UnionHolder();

unionVector.get(0, holder);
NullableDecimalHolder decimalHolder = new NullableDecimalHolder();
holder.reader.read(decimalHolder);

assertEquals(1, decimalHolder.isSet);
assertEquals(
new BigDecimal("0.1"),
DecimalUtility.getBigDecimalFromArrowBuf(
decimalHolder.buffer, 0, decimalHolder.scale, 128));

unionVector.get(1, holder);
NullableIntHolder intHolder = new NullableIntHolder();
holder.reader.read(intHolder);

assertEquals(1, intHolder.isSet);
assertEquals(1, intHolder.value);
}
}
}
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