Use to_uppercase

Author: sbernauer

rust/operator-binary/src/catalog/postgresql.rs

@@ -22,8 +22,11 @@ impl ToCatalogConfig for PostgresqlConnector {
         _trino_version: u16,
     ) -> Result<CatalogConfig, FromTrinoCatalogError> {
         let mut config = CatalogConfig::new(catalog_name.to_string(), CONNECTOR_NAME);
-        // SAFETY: `unique_database_name` must only contains ASCII letters and underscores.
-        let unique_database_name = format!("POSTGRESQL_{}", catalog_name.replace('-', "_"));
+        // SAFETY: `unique_database_name` must only contains uppercase ASCII letters and underscores.
+        let unique_database_name = format!(
+            "POSTGRESQL_{}",
+            catalog_name.replace('-', "_").to_uppercase()
+        );
         let jdbc_connection_details = self
             .inner
             .jdbc_connection_details(&unique_database_name)