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https://issues.apache.org/jira/browse/FLINK-35852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17866255#comment-17866255
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yux commented on FLINK-35852:
-----------------------------

Thanks for [~zheng_shengsheng]'s detailed report, I will nvestigate this.

> When used through the transform function, the decimal(10,2) type field value 
> in the MySQL source table becomes 100 times the original value after being 
> transferred to the target table.
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-35852
>                 URL: https://issues.apache.org/jira/browse/FLINK-35852
>             Project: Flink
>          Issue Type: Bug
>          Components: Flink CDC
>    Affects Versions: cdc-3.1.1
>         Environment: flink-1.18.0、 
> flink-cdc-3.1.1、mysql-5.7.43、Doris-2.0.6、CentOS Linux release 8.5.2111
>            Reporter: zheng_shengsheng
>            Priority: Major
>         Attachments: image-2024-07-16-14-46-53-982.png, 
> sp20240716_144157_519.png, sp20240716_144344_710.png
>
>
> When I use CDC's yaml mode to collect MySQL data to Doris, I use the latest 
> supported transform feature.
> Finally, I found that the database table in MySQL collected and the 
> decimal(10,2) type fields in the Mysql source table were automatically 
> converted into decimal(19,0) in Doris, and then the value size became 100 
> times the original size. As follows
> The core part of yaml is as follows:
> {code:java}
> // code placeholder
> source:
>   type: mysql
>   hostname: node2
>   port: 3306
>   username: ****
>   password: ****
>   tables: sys_canteen_consume_conf,sys_canteen_consume_rec,sys_order_course,
>   server-id: 5513
>   connectionTimeZone: GMT+8
>   scan.startup.mode: initialsink:
>   type: doris
>   fenodes: node3:8030
>   username: admin
>   password: ****
>   table.create.properties.light_schema_change: true
>   table.create.properties.replication_num: 1transform:
>   - source-table: jeecg-boot2.sys_\.*
>     projection: concat('LYDB2','') as tenant_code, *
>     primary-keys: tenant_code,id
>   - source-table: jeecg-boot2.sys_user_depart
>     projection: concat('LYDB2','') as tenant_code, *
>     primary-keys: tenant_code,ID  pipeline:
>   name: test,server-id-5513,flinkCDC-3.1.1
>   parallelism: 1 {code}



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