[
https://issues.apache.org/jira/browse/FLINK-25311?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Martijn Visser reassigned FLINK-25311:
--------------------------------------
Assignee: Jinxin.Tang
> DelimitedInputFormat cannot read compressed files correctly
> -----------------------------------------------------------
>
> Key: FLINK-25311
> URL: https://issues.apache.org/jira/browse/FLINK-25311
> Project: Flink
> Issue Type: Bug
> Components: API / Core
> Affects Versions: 1.14.2
> Reporter: Caizhi Weng
> Assignee: Jinxin.Tang
> Priority: Major
> Attachments: gao.gz, gao.json
>
>
> This is reported from the [user mailing
> list|https://lists.apache.org/thread/y854gjxyomtypcs8x4f88pttnl9k0j9q].
> Run the following test to reproduce this bug.
> {code:java}
> import org.apache.flink.table.api.EnvironmentSettings;
> import org.apache.flink.table.api.TableEnvironment;
> import org.apache.flink.table.api.internal.TableEnvironmentImpl;
> import org.junit.Test;
> public class MyTest {
> @Test
> public void myTest() throws Exception {
> EnvironmentSettings settings = EnvironmentSettings.inBatchMode();
> TableEnvironment tEnv = TableEnvironmentImpl.create(settings);
> tEnv.executeSql(
> "create table T1 ( a INT ) with ( 'connector' =
> 'filesystem', 'format' = 'json', 'path' = '/tmp/gao.json' )")
> .await();
> tEnv.executeSql(
> "create table T2 ( a INT ) with ( 'connector' =
> 'filesystem', 'format' = 'json', 'path' = '/tmp/gao.gz' )")
> .await();
> tEnv.executeSql("select count(*) from T1 UNION ALL select count(*)
> from T2").print();
> }
> }
> {code}
> Data files used are attached in the attachment.
> The result is
> {code}
> +----------------------+
> | EXPR$0 |
> +----------------------+
> | 100 |
> | 24 |
> +----------------------+
> {code}
> which is obviously incorrect.
> This is because {{DelimitedInputFormat#fillBuffer}} cannot deal with
> compressed files correctly. It limits the number of (uncompressed) bytes read
> with {{splitLength}}, while {{splitLength}} is the length of compressed
> bytes, so they cannot match.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
