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Flink Jira Bot updated FLINK-11063: ----------------------------------- Labels: auto-deprioritized-major (was: stale-major) > Make flink-table Scala-free > --------------------------- > > Key: FLINK-11063 > URL: https://issues.apache.org/jira/browse/FLINK-11063 > Project: Flink > Issue Type: New Feature > Components: Table SQL / API > Affects Versions: 1.7.0 > Reporter: Timo Walther > Priority: Major > Labels: auto-deprioritized-major > > Currently, the Table & SQL API is implemented in Scala. This decision was > made a long-time ago when the initial code base was created as part of a > master's thesis. The community kept Scala because of the nice language > features that enable a fluent Table API like {{table.select('field.trim())}} > and because Scala allows for quick prototyping (e.g. multi-line comments for > code generation). The committers enforced not splitting the code-base into > two programming languages. > However, nowadays the {{flink-table}} module more and more becomes an > important part in the Flink ecosystem. Connectors, formats, and SQL client > are actually implemented in Java but need to interoperate with > {{flink-table}} which makes these modules dependent on Scala. As mentioned in > an earlier mail thread, using Scala for API classes also exposes member > variables and methods in Java that should not be exposed to users. Java is > still the most important API language and right now we treat it as a > second-class citizen. > In order to not introduce more technical debt, the community aims to make the > {{flink-table}} module Scala-free as a long-term goal. This will be a > continuous effort that can not be finished within one release. We aim for > avoiding API-breaking changes. > A full description can be found in the corresponding > [FLIP-28|https://cwiki.apache.org/confluence/display/FLINK/FLIP-28%3A+Long-term+goal+of+making+flink-table+Scala-free]. > FLIP-28 also contains a rough roadmap and serves as migration guidelines. > This Jira issue is an umbrella issue for tracking the efforts and possible > migration blockers. > *+Update+*: Due to the big code contribution of Alibaba into Flink SQL. We > will only perform porting of API classes for now. This is mostly tracked by > FLINK-11448. > FLIP-28 is legacy and has been integrated into > [FLIP-32|https://cwiki.apache.org/confluence/display/FLINK/FLIP-32%3A+Restructure+flink-table+for+future+contributions]. -- This message was sent by Atlassian Jira (v8.3.4#803005)