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https://issues.apache.org/jira/browse/FLINK-9977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16578356#comment-16578356
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ASF GitHub Bot commented on FLINK-9977:
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fhueske commented on a change in pull request #6535: [FLINK-9977] [table][doc]
Refine the SQL/Table built-in function docs
URL: https://github.com/apache/flink/pull/6535#discussion_r209634884
##########
File path: docs/dev/table/functions.md
##########
@@ -0,0 +1,5131 @@
+---
+title: "Built-In Functions"
+nav-parent_id: tableapi
+nav-pos: 45
+---
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements. See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership. The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied. See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+Flink Table API & SQL provides users with a set of built-in functions for data
transformations. This page gives a brief overview of them.
+If a function that you need is not supported yet, you can implement a <a
href="udfs.html">user-defined function</a>.
+Or if you think the function is general enough, please <a
href="https://issues.apache.org/jira/secure/CreateIssue!default.jspa";>open a
JIRA issue</a> for it.
Review comment:
Remove `Or` -> `If you think that the function is general enough, please
open a Jira issue for it with a detailed description.`
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> Refine the docs for Table/SQL built-in functions
> ------------------------------------------------
>
> Key: FLINK-9977
> URL: https://issues.apache.org/jira/browse/FLINK-9977
> Project: Flink
> Issue Type: Improvement
> Components: Documentation
> Reporter: Xingcan Cui
> Assignee: Xingcan Cui
> Priority: Minor
> Labels: pull-request-available
> Attachments: Java.jpg, SQL.jpg, Scala.jpg
>
>
> There exist some syntax errors or inconsistencies in documents and Scala docs
> of the Table/SQL built-in functions. This issue aims to make some
> improvements to them.
> Also, according to FLINK-10103, we should use single quotes to express
> strings in SQL. For example, CONCAT("AA", "BB", "CC") should be replaced with
> CONCAT('AA', 'BB', 'CC').
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