Avro架构和生成文件中的十进制数据类型支持 [英] Decimal Datatype Support in Avro Schema and Generated Files

问题描述

此问题与Avro 1.8.1版有关.

This question concerns Avro version 1.8.1.

我们的AVRO模式中有以下字段:

We have the following field in our AVRO schema:

"name" : "sale_price", 
"type" : ["bytes", "null"], 
"logicalType": "decimal", 
"precision": 18, 
"scale": 17,

如您所见，该字段的逻辑类型已定义为decimal.

As you can see, the logicalType of the field has been defined as decimal.

但是，当我们使用avro-maven-plugin时，它不会在生成的Java源文件中生成正确的数据类型. 而是生成java.nio.ByteBuffer. 您将如何在Java文件中生成正确的数据类型?

But when we use the avro-maven-plugin, it does not generate the correct data type within the generated Java source files. Instead it generates, java.nio.ByteBuffer. How would you have the correct data type generated within the Java files?

这是我们的插件配置:

<plugin>
    <groupId>org.apache.avro</groupId>
    <artifactId>avro-maven-plugin</artifactId>
    <version>1.8.1</version>
    <configuration>
        <stringType>String</stringType>
        <enableDecimalLogicalType>true</enableDecimalLogicalType>
    </configuration>
</plugin>

推荐答案

如果要使用BigDecimal，则需要使用1.8.2版，并将具有true值的enableDecimalLogicalType参数添加到pom文件中:

If you want BigDecimal you need to use version 1.8.2 and add enableDecimalLogicalType parameter with true value to your pom file:

<plugin>
<groupId>org.apache.avro</groupId>
<artifactId>avro-maven-plugin</artifactId>
<executions>
    <execution>
        <id>generate-avro-sources</id>
        <phase>generate-sources</phase>
        <goals>
            <goal>schema</goal>
        </goals>
        <configuration>
            <sourceDirectory>${basedir}/src/main/avro/</sourceDirectory>
            <outputDirectory>${basedir}/generated-sources/main/java/</outputDirectory>
            <enableDecimalLogicalType>true</enableDecimalLogicalType>
        </configuration>
    </execution>
</executions>

有关更多信息，请检查以下问题: https://issues.apache.org/jira/browse/AVRO-1847

For more info, check this issue: https://issues.apache.org/jira/browse/AVRO-1847

这篇关于Avro架构和生成文件中的十进制数据类型支持的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！