[
https://issues.apache.org/jira/browse/FLINK-4832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15650089#comment-15650089
]
Anton Mushin commented on FLINK-4832:
-------------------------------------
Hello [~fhueske]
bq. We need to inject a Union before the Map with static data set with a single
record, that contains only null values for each field.
How can I create dataset with null values for each field? How I understood
Flink not support empty dataSet or null values records.
Code is for example:
{code}
val ds = env.fromElements(
(1: Byte, 1: Short),
(2: Byte, 2: Short),
(null,null))
.toTable(tEnv, 'a, 'b) // ==> Caused by:
org.apache.flink.api.table.TableException: Unsupported data type encountered:
ANY
//file is empty
env.readCsvFile[(Byte, Short)](file, includedFields = Array(0, 1)).collect() //
==> org.apache.flink.api.common.io.ParseException: Row too short:
{code}
Do need in the this issue add support empty DataSet?
> Count/Sum 0 elements
> --------------------
>
> Key: FLINK-4832
> URL: https://issues.apache.org/jira/browse/FLINK-4832
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Anton Mushin
>
> Currently, the Table API is unable to count or sum up 0 elements. We should
> improve DataSet aggregations for this. Maybe by union the original DataSet
> with a dummy record or by using a MapPartition function. Coming up with a
> good design for this is also part of this issue.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
