You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@flink.apache.org by "Cai Liuyang (Jira)" <ji...@apache.org> on 2023/12/06 05:26:00 UTC
[jira] [Updated] (FLINK-33759) flink parquet writer support write nested array or map type
[ https://issues.apache.org/jira/browse/FLINK-33759?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Cai Liuyang updated FLINK-33759:
--------------------------------
Description:
When we use flink-parquet format wirte Map<String, String>[] type (which will be read by spark job), we encounter an exception:
{code:java}
// code placeholder
org.apache.parquet.io.ParquetEncodingException: empty fields are illegal, the field should be ommited completely instead {code}
org.apache.parquet.io.ParquetEncodingException: empty fields are illegal, the field should be ommited completely instead
``, after review the code, we found flink-parquet doesn't support write nested array or map, because [ArrayWriter|#L437] and [MapWriter|#L391] doesn't impl `public void write(ArrayData arrayData, int ordinal) {}` function.
was:When we use flink-parquet format wirte Map<String, String>[] type (which will be read by spark job), we encounter an exception: `org.apache.parquet.io.ParquetEncodingException: empty fields are illegal, the field should be ommited completely instead`, after review the code, we found flink-parquet doesn't support write nested array or map, because [ArrayWriter|[https://github.com/apache/flink/blob/master/flink-formats/flink-parquet/src/main/java/org/apache/flink/formats/parquet/row/ParquetRowDataWriter.java#L437|https://github.com/apache/flink/blob/master/flink-formats/flink-parquet/src/main/java/org/apache/flink/formats/parquet/row/ParquetRowDataWriter.java#L437)]] and [MapWriter|[https://github.com/apache/flink/blob/master/flink-formats/flink-parquet/src/main/java/org/apache/flink/formats/parquet/row/ParquetRowDataWriter.java#L391|https://github.com/apache/flink/blob/master/flink-formats/flink-parquet/src/main/java/org/apache/flink/formats/parquet/row/ParquetRowDataWriter.java#L391)]] doesn't impl `public void write(ArrayData arrayData, int ordinal) {}` function.
> flink parquet writer support write nested array or map type
> -----------------------------------------------------------
>
> Key: FLINK-33759
> URL: https://issues.apache.org/jira/browse/FLINK-33759
> Project: Flink
> Issue Type: Improvement
> Components: Formats (JSON, Avro, Parquet, ORC, SequenceFile)
> Reporter: Cai Liuyang
> Priority: Major
>
> When we use flink-parquet format wirte Map<String, String>[] type (which will be read by spark job), we encounter an exception:
> {code:java}
> // code placeholder
> org.apache.parquet.io.ParquetEncodingException: empty fields are illegal, the field should be ommited completely instead {code}
> org.apache.parquet.io.ParquetEncodingException: empty fields are illegal, the field should be ommited completely instead
> ``, after review the code, we found flink-parquet doesn't support write nested array or map, because [ArrayWriter|#L437] and [MapWriter|#L391] doesn't impl `public void write(ArrayData arrayData, int ordinal) {}` function.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)