wuchong commented on a change in pull request #16126:
URL: https://github.com/apache/flink/pull/16126#discussion_r648869048
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File path: docs/content.zh/docs/dev/table/sql/queries/overview.md
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@@ -393,7 +393,37 @@ Flink SQL uses a lexical policy for identifier (table,
attribute, function names
- After which, identifiers are matched case-sensitively.
- Unlike Java, back-ticks allow identifiers to contain non-alphanumeric
characters (e.g. <code>"SELECT a AS `my field` FROM t"</code>).
-String literals must be enclosed in single quotes (e.g., `SELECT 'Hello
World'`). Duplicate a single quote for escaping (e.g., `SELECT 'It''s me.'`).
Unicode characters are supported in string literals. If explicit unicode code
points are required, use the following syntax:
+String literals must be enclosed in single quotes (e.g., `SELECT 'Hello
World'`). Duplicate a single quote for escaping (e.g., `SELECT 'It''s me.'`).
Review comment:
I think a simple example is enough:
```
Flink SQL> SELECT 'Hello World', 'It''s me';
+-------------+---------+
| EXPR$0 | EXPR$1 |
+-------------+---------+
| Hello World | It's me |
+-------------+---------+
1 row in set
```
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