[jira] [Updated] (FLINK-19749) Improve documentation in Table API page

["Dian Fu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-19749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dian Fu updated FLINK-19749:
----------------------------
    Summary: Improve documentation in Table API page  (was: Improve documentation for "Column Operations" in Table API page)

> Improve documentation in Table API page
> ---------------------------------------
>
>                 Key: FLINK-19749
>                 URL: https://issues.apache.org/jira/browse/FLINK-19749
>             Project: Flink
>          Issue Type: Improvement
>          Components: Documentation, Table SQL / API
>            Reporter: appleyuchi
>            Assignee: Roc Marshal
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.12.0
>
>         Attachments: Old API examples.png
>
>
> in this [link|https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/tableApi.html] there's a "description":
> *Performs a field add operation. Existing fields will be replaced if add columns name is the same as the existing column name. Moreover, if the added fields have duplicate field name, then the last one is used.*
> Two point:
> ①" add columns name "->" added column's name"
> ②"if the added fields have duplicate field name",
> what's the example that has two duplicate field name?
> Could you modify them?
> They're a little misleading/unclear.



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