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https://issues.apache.org/jira/browse/AVRO-2042?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ryan Blue resolved AVRO-2042.
-----------------------------
Resolution: Not A Problem
Assignee: Ryan Blue
> Can't reliably write decimal/BigDecimal values to file
> -------------------------------------------------------
>
> Key: AVRO-2042
> URL: https://issues.apache.org/jira/browse/AVRO-2042
> Project: Avro
> Issue Type: Bug
> Affects Versions: 1.8.2
> Reporter: Fred Cohen
> Assignee: Ryan Blue
> Attachments: AvroDecimal.avsc, AvroDecimalTest.java
>
>
> Attempting to write some decimal values fails.
> Here's the schema I created for this test:
> {
> "namespace":"org.test",
> "type": "record",
> "name": "DecimalTest",
> "fields": [
> {
> "name": "decimalVal",
> "type": {"type": "bytes", "logicalType":"decimal","precision": 6,
> "scale": 4}
> }
> ]
> }
> The problem is that to my knowledge I can't control the scale used by
> BigDecimal.
> While the first value uses a scale of 4, the second one is scale 0.
> decimals.add(new BigDecimal(12.01F, mathContext));
> decimals.add(new BigDecimal(12.00F, mathContext));
> It leads to these errors during the write operation:
> org.apache.avro.file.DataFileWriter$AppendWriteException:
> org.apache.avro.AvroTypeException: Cannot encode decimal with scale 0 as
> scale 4
> at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:308)
> at AvroDecimalTest.writeDecimalTest(AvroDecimalTest.java:67)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
> at
> com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
> at
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237)
> at
> com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
> Caused by: org.apache.avro.AvroTypeException: Cannot encode decimal with
> scale 0 as scale 4
> at
> org.apache.avro.Conversions$DecimalConversion.toBytes(Conversions.java:92)
> at
> org.apache.avro.Conversions$DecimalConversion.toBytes(Conversions.java:62)
> at org.apache.avro.Conversions.convertToRawType(Conversions.java:218)
> at
> org.apache.avro.generic.GenericDatumWriter.convert(GenericDatumWriter.java:95)
> at
> org.apache.avro.specific.SpecificDatumWriter.writeField(SpecificDatumWriter.java:84)
> at
> org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:156)
> at
> org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:118)
> at
> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:75)
> at
> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:62)
> at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:302)
> ... 23 more
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