Hi Benchao,
Thanks for your reply, key word `antlr` appeared in three modules of master
branch,
1. flink-python
2. flink-sql-client
3. flink-hive-connector
I also found just tag `exclusion` is used for `Antlr`, so the aim of which is
to exclude it from 'hive-exec’ dependency, right? That makes sense.
We are exploring Apache Flink and Apache Calcite, very appreciated your prompt
reply.
Regards,
Trista.
Juan Pan (Trista)
Senior DBA & PPMC of Apache ShardingSphere(Incubating)
E-mail: panj...@apache.org
On 12/29/2019 15:22，Benchao Li<libenc...@gmail.com> wrote：
Hi Juan,
I searched in the repo, and only found two modules contains `org.antlr`:
1, flink-sql-client
2, flink-connector-hive
But they exist only because we need to exclude them from 'hive-exec' dependency.
BTW, where did you find flink importing `org.antlr` ?
Juan Pan <panj...@apache.org> 于2019年12月29日周日 下午3:07写道：
Hi folks,
Excuse me for this help-seeking email. I tried to query the related questions
on Stack Overflow and Apache Pony archived emails, but there is no answer there.
From my understanding, Flink parses SQL with the help of JavaCC and Apache
calcite. Therefore, why does Flink import Antlr at the same time? For what?
Could anyone give me some hints? Thanks in advance.
Best wishes,
Trista
Juan Pan (Trista)
Senior DBA & PPMC of Apache ShardingSphere(Incubating)
E-mail: panj...@apache.org
--
Benchao Li
School of Electronics Engineering and Computer Science, Peking University
Tel:+86-15650713730
Email: libenc...@gmail.com; libenc...@pku.edu.cn
