From issues-return-180730-archive-asf-public=cust-asf.ponee.io@flink.apache.org Sat Jul 28 10:39:04 2018 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id 088C9180679 for ; Sat, 28 Jul 2018 10:39:03 +0200 (CEST) Received: (qmail 59189 invoked by uid 500); 28 Jul 2018 08:39:03 -0000 Mailing-List: contact issues-help@flink.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@flink.apache.org Delivered-To: mailing list issues@flink.apache.org Received: (qmail 59168 invoked by uid 99); 28 Jul 2018 08:39:03 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd3-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 28 Jul 2018 08:39:03 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd3-us-west.apache.org (ASF Mail Server at spamd3-us-west.apache.org) with ESMTP id 8C1491801AE for ; Sat, 28 Jul 2018 08:39:02 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd3-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -110.301 X-Spam-Level: X-Spam-Status: No, score=-110.301 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, USER_IN_DEF_SPF_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd3-us-west.apache.org [10.40.0.10]) (amavisd-new, port 10024) with ESMTP id TD6mJJShx9BY for ; Sat, 28 Jul 2018 08:39:01 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with ESMTP id A34FB5F3AC for ; Sat, 28 Jul 2018 08:39:01 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id E6C75E25D5 for ; Sat, 28 Jul 2018 08:39:00 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id 5E8AA27762 for ; Sat, 28 Jul 2018 08:39:00 +0000 (UTC) Date: Sat, 28 Jul 2018 08:39:00 +0000 (UTC) From: "Hequn Cheng (JIRA)" To: issues@flink.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (FLINK-6810) Add Some built-in Scalar Function supported MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/FLINK-6810?page=3Dcom.atlassian= .jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D1656= 0665#comment-16560665 ]=20 Hequn Cheng commented on FLINK-6810: ------------------------------------ Hi all, I added an instruction about=C2=A0how=C2=A0to contribute a build-in= scalar function in this Jira description.=C2=A0Hope=C2=A0it helps you when= you going to make a contribute. > Add Some built-in Scalar Function supported > ------------------------------------------- > > Key: FLINK-6810 > URL: https://issues.apache.org/jira/browse/FLINK-6810 > Project: Flink > Issue Type: New Feature > Components: Table API & SQL > Affects Versions: 1.4.0 > Reporter: sunjincheng > Assignee: sunjincheng > Priority: Major > Labels: starter > > In this JIRA, will create some sub-task for add specific scalar function,= such as mathematical-function {{LOG}}, date-functions > {{DATEADD}},string-functions {{LPAD}}, etc.=20 > *How To Contribute a build-in scalar function* > Thank you very much for contributing a build-in function. In order to mak= e sure your contributions are in a good direction, it is recommended to rea= d the following instructions. > # Research the behavior of the function which you are going to contribute= in major DBMSs. This is very import since we have to understand the exact = semantics of the function. > # It is recommended to add function both for sql and talbe-api. > # Every scalar function should add TableAPI docs in {{./docs/dev/table/t= ableApi.md#built-in-functions}}. Add SQL docs in {{./docs/dev/table/sql.md#= built-in-functions}}. When add docs for table-api, you should add both scal= a docs and java docs. Make sure your description of the function is accurat= e. Please do not copy documentation from other projects. Especially if othe= r projects are not Apache licensed. > # Take overflow, NullPointerException and other exceptions into considera= tion. > Welcome anybody to add the sub-task about standard database scalar functi= on. -- This message was sent by Atlassian JIRA (v7.6.3#76005)