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Posted to user-zh@flink.apache.org by LittleFall <15...@qq.com> on 2020/09/01 09:25:50 UTC

Flink SQL 为什么不支持 utf8mb4 字符集？

问下大家，我在 flink 1.11 sql client 中执行

```sql
CREATE TABLE `test16`  (
  `c_first` varchar(16) CHARACTER SET `UTF-16LE`
)WITH ('connector' = 'blackhole');
```

是可以成功创建一张表的。

而执行

```sql
CREATE TABLE `test8`  (
  `c_first` varchar(16) CHARACTER SET `utf8mb4`
)WITH ('connector' = 'blackhole');
```

则会报错：
[ERROR] Could not execute SQL statement. Reason:
java.lang.NullPointerException: utf8mb4


从官网文档中查到支持的字符集有 'US-ASCII', 'ISO-8859-1', 'UTF-8', 'UTF-16BE', 'UTF-16LE',
'UTF-16'.

请问出于什么样的考量不支持 utf8mb4 字符集呢，未来有支持打算吗？



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