src/cli/user_command.rs

@@ -290,14 +290,14 @@ async fn show_users(
             "User",
             "Password is set",
             "Locked",
-            "Databases where user has privileges"
+            // "Databases where user has privileges"
         ]);
         for user in users {
             table.add_row(row![
                 user.user,
                 user.has_password,
                 user.is_locked,
-                user.databases.join("\n")
+                // user.databases.join("\n")
             ]);
         }
         table.printstd();

src/core/database_privileges.rs

@@ -160,9 +160,7 @@ pub fn generate_editor_content_from_privilege_data(
     database_name: Option<&str>,
 ) -> String {
     let example_user = format!("{}_user", unix_user);
-    let example_db = database_name
-        .unwrap_or(&format!("{}_db", unix_user))
-        .to_string();
+    let example_db = database_name.unwrap_or(&format!("{}_db", unix_user)).to_string();
 
     // NOTE: `.max()`` fails when the iterator is empty.
     //       In this case, we know that the only fields in the

src/core/protocol/server_responses.rs

@@ -95,7 +95,8 @@ impl OwnerValidationError {
                     .join("\n"),
             )
             .to_owned(),
-            OwnerValidationError::StringEmpty => format!(
+
+            _ => format!(
                 "'{}' is not a valid {} name.",
                 name,
                 db_or_user.lowercased()
@@ -112,6 +113,12 @@ pub enum OwnerValidationError {
 
     // The name is empty, which is invalid
     StringEmpty,
+
+    // The name is in the format "_<postfix>", which is invalid
+    MissingPrefix,
+
+    // The name is in the format "<prefix>_", which is invalid
+    MissingPostfix,
 }
 
 pub type CreateDatabasesOutput = BTreeMap<String, Result<(), CreateDatabaseError>>;

src/server/input_sanitization.rs

@@ -43,15 +43,19 @@ pub fn validate_ownership_by_prefixes(
         return Err(OwnerValidationError::StringEmpty);
     }
 
-    if prefixes
-        .iter()
-        .filter(|p| name.starts_with(*p))
-        .collect::<Vec<_>>()
-        .is_empty()
-    {
-        return Err(OwnerValidationError::NoMatch);
+    if name.starts_with('_') {
+        return Err(OwnerValidationError::MissingPrefix);
+    }
+
+    let (prefix, _) = match name.split_once('_') {
+        Some(pair) => pair,
+        None => return Err(OwnerValidationError::MissingPostfix),
     };
 
+    if !prefixes.iter().any(|g| g == prefix) {
+        return Err(OwnerValidationError::NoMatch);
+    }
+
     Ok(())
 }
 
@@ -111,6 +115,24 @@ mod tests {
             Err(OwnerValidationError::StringEmpty)
         );
 
+        assert_eq!(
+            validate_ownership_by_prefixes("user", &prefixes),
+            Err(OwnerValidationError::MissingPostfix)
+        );
+        assert_eq!(
+            validate_ownership_by_prefixes("something", &prefixes),
+            Err(OwnerValidationError::MissingPostfix)
+        );
+        assert_eq!(
+            validate_ownership_by_prefixes("user-testdb", &prefixes),
+            Err(OwnerValidationError::MissingPostfix)
+        );
+
+        assert_eq!(
+            validate_ownership_by_prefixes("_testdb", &prefixes),
+            Err(OwnerValidationError::MissingPrefix)
+        );
+
         assert_eq!(
             validate_ownership_by_prefixes("user_testdb", &prefixes),
             Ok(())

src/server/sql/user_operations.rs

@@ -1,6 +1,4 @@
-use itertools::Itertools;
 use std::collections::BTreeMap;
-use indoc::formatdoc;
 
 use serde::{Deserialize, Serialize};
 
@@ -22,8 +20,6 @@ use crate::{
     },
 };
 
-use super::database_privilege_operations::DATABASE_PRIVILEGE_FIELDS;
-
 // NOTE: this function is unsafe because it does no input validation.
 async fn unsafe_user_exists(
     db_user: &str,
@@ -313,9 +309,6 @@ pub struct DatabaseUser {
 
     #[sqlx(rename = "is_locked")]
     pub is_locked: bool,
-
-    #[sqlx(skip)]
-    pub databases: Vec<String>,
 }
 
 const DB_USER_SELECT_STATEMENT: &str = r#"
@@ -351,17 +344,13 @@ pub async fn list_database_users(
             continue;
         }
 
-        let mut result = sqlx::query_as::<_, DatabaseUser>(
+        let result = sqlx::query_as::<_, DatabaseUser>(
             &(DB_USER_SELECT_STATEMENT.to_string() + "WHERE `mysql`.`user`.`User` = ?"),
         )
         .bind(&db_user)
         .fetch_optional(&mut *connection)
         .await;
 
-        if let Ok(Some(user)) = result.as_mut() {
-            append_databases_where_user_has_privileges(user, &mut *connection).await;
-        }
-
         match result {
             Ok(Some(user)) => results.insert(db_user, Ok(user)),
             Ok(None) => results.insert(db_user, Err(ListUsersError::UserDoesNotExist)),
@@ -376,50 +365,11 @@ pub async fn list_all_database_users_for_unix_user(
     unix_user: &UnixUser,
     connection: &mut MySqlConnection,
 ) -> ListAllUsersOutput {
-    let mut result = sqlx::query_as::<_, DatabaseUser>(
+    sqlx::query_as::<_, DatabaseUser>(
         &(DB_USER_SELECT_STATEMENT.to_string() + "WHERE `mysql`.`user`.`User` REGEXP ?"),
     )
     .bind(create_user_group_matching_regex(unix_user))
-    .fetch_all(&mut *connection)
+    .fetch_all(connection)
     .await
-    .map_err(|err| ListAllUsersError::MySqlError(err.to_string()));
-
-    if let Ok(users) = result.as_mut() {
-        for user in users {
-            append_databases_where_user_has_privileges(user, &mut *connection).await;
-        }
-    }
-
-    result
-}
-
-pub async fn append_databases_where_user_has_privileges(
-    database_user: &mut DatabaseUser,
-    connection: &mut MySqlConnection,
-) {
-    let database_list = sqlx::query(
-        formatdoc!(
-            r#"
-                SELECT `db` AS `database`
-                FROM `db`
-                WHERE `user` = ? AND ({})
-            "#,
-            DATABASE_PRIVILEGE_FIELDS
-                .iter()
-                .map(|field| format!("`{}` = 'Y'", field))
-                .join(" OR "),
-        )
-        .as_str(),
-    )
-    .bind(database_user.user.clone())
-    .fetch_all(&mut *connection)
-    .await;
-
-    database_user.databases = database_list
-        .map(|rows| {
-            rows.into_iter()
-                .map(|row| row.get::<String, _>("database"))
-                .collect()
-        })
-        .unwrap_or_default();
+    .map_err(|err| ListAllUsersError::MySqlError(err.to_string()))
 }