WIP: change code for mysql 5.7

src/BackupTablesService.php

@@ -107,8 +107,35 @@ protected function backupTablesForSqlite($newTableName, $table): array
 
     protected function backupTablesForForMysql($newTableName, $table): array
     {
-        DB::statement(/**@lang MySQL*/ "CREATE TABLE $newTableName LIKE $table");
-        DB::statement(/**@lang MySQL*/"INSERT INTO $newTableName SELECT * FROM $table");
+
+        if ($this->getMysqlVersion() >= Constants::VERSION_AFTER_STORED_AS_VIRTUAL_AS_SUPPORT) {
+            DB::statement(/**@lang PostgreSQL */ "CREATE TABLE $newTableName AS SELECT * FROM $table");
+            return $this->returnedBackupResponse($newTableName, $table);
+        }
+
+        // for MySQL 5.7
+
+        // Step 1: Create the new table with the same structure, including generated columns
+        //DB::statement(/**@lang MySQL */ "CREATE TABLE $newTableName LIKE $table");
+
+        // Step 2: get the definition for generated columns `SHOW CREATE TABLE $table`
+        // Step 3: extract the virtual columns definition to alter them later
+        // Step 4: get all non-generated columns, then insert them to the new table
+        // Step 5: Alter new table to add the generated tables definitions.
+
+
+        $generatedColumns = collect(DB::select(DB::raw('SHOW COLUMNS FROM $table')))
+        ;
+
+        // Step 2: Get the list of columns, excluding generated columns
+        //$columns = collect(DB::select(DB::raw("SHOW COLUMNS FROM $table")))
+        //    ->reject(function ($column) {
+        //        return str_contains($column->Extra, 'VIRTUAL GENERATED') || str_contains($column->Extra, 'STORED GENERATED');
+        //    })->pluck('Field')
+        //    ->implode(', ');
+
+        // Step 3: Insert data into the new table, excluding generated columns
+        //DB::statement(/**@lang MySQL */ "INSERT INTO $newTableName ($columns) SELECT $columns FROM $table");
 
         return $this->returnedBackupResponse($newTableName, $table);
     }