Use mysql x'baba' syntax instead of unhex('baba') (#34417)

GitOrigin-RevId: 27d3d7a15458f8e6ff33e3540c14f341f44efc80

Author: goffrie

crates/common/src/testing/persistence_test_suite.rs

@@ -522,6 +522,7 @@ pub async fn write_and_load_value_types<P: Persistence>(p: Arc<P>) -> anyhow::Re
         ConvexValue::String("\u{10348}".try_into()?),
         ConvexValue::Bytes(vec![].try_into()?),
         ConvexValue::Bytes(vec![3, 3, 4, 4].try_into()?),
+        ConvexValue::Bytes(vec![0; (1 << 25) - 10000].try_into()?),
         ConvexValue::Array(vec![ConvexValue::Null].try_into()?),
         ConvexValue::Set(btreeset!(ConvexValue::Null).try_into()?),
         ConvexValue::Map(btreemap!(ConvexValue::Null => ConvexValue::Null).try_into()?),

crates/mysql/src/connection.rs

@@ -173,7 +173,7 @@ fn format_mysql_text_protocol(
             .into_iter()
             .map(|p| match p {
                 MySqlValue::NULL => "NULL".to_owned(),
-                MySqlValue::Bytes(bytes) => format!("unhex('{}')", hex::encode(bytes)),
+                MySqlValue::Bytes(bytes) => format!("x'{}'", hex::encode(bytes)),
                 MySqlValue::Int(i) => format!("{i}"),
                 MySqlValue::UInt(u) => format!("{u}"),
                 // We don't use the following and I don't want to deal with escaping them.
@@ -556,7 +556,7 @@ mod tests {
             encoded,
             r#"
     SELECT * FROM presley_db.indexes
-    WHERE (key, value) IN (-27, unhex('2178613f29'))
+    WHERE (key, value) IN (-27, x'2178613f29')
     AND deleted IS NULL",
 "#,
         );