modify readme

Signed-off-by: zjregee <zjregee@gmail.com>
risinglightdb · Sep 6, 2024 · 455286a · 455286a
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diff --git a/README.md b/README.md
@@ -44,7 +44,7 @@ You can find more options in `sqllogictest --help` .
 
 > **Note**
 >
-> Currently only postgres is supported in the CLI tool.
+> Currently only postgres and mysql are supported in the CLI tool.
 
 ## `.slt` Test File Format Cookbook
 

diff --git a/sqllogictest-engines/src/mysql.rs b/sqllogictest-engines/src/mysql.rs
@@ -42,9 +42,10 @@ impl sqllogictest::AsyncDB for MySql {
                 let value_str = match value {
                     Value::Bytes(bytes) => match String::from_utf8(bytes) {
                         Ok(x) => x,
-                        Err(_) => "NULL".to_string(),
+                        Err(_) => unreachable!(),
                     },
-                    _ => "NULL".to_string(),
+                    Value::NULL => "NULL".to_string(),
+                    _ => unreachable!(),
                 };
                 if value_str.is_empty() {
                     row_vec.push("(empty)".to_string());