/** * Drop removed types * Add new types * Apply type definition differences, updating the type's tables along the way * * @param $ofs output file segmenter * @param $old_schema original schema * @param $new_schema new schema */ public static function apply_changes($ofs, $old_schema, $new_schema) { // drop any types that are no longer defined self::drop_types($ofs, $old_schema, $new_schema); // create any types that are new in the new definition self::create_types($ofs, $old_schema, $new_schema); // there is no alter for types // find types that still exist that are different // placehold type data in table columns, and recreate the type foreach (dbx::get_types($new_schema) as $new_type) { // does type exist in old definition ? if ($old_schema == NULL || !mssql10_schema::contains_type($old_schema, $new_type['name'])) { continue; } $old_type = dbx::get_type($old_schema, $new_type['name']); // is there a difference between the old and new type definitions? if (mssql10_type::equals($old_schema, $old_type, $new_schema, $new_type)) { continue; } $columns = array(); $ofs->write("-- type " . $new_type['name'] . " definition migration (1/4): dependant tables column constraint drop\n"); $ofs->write(mssql10_type::column_constraint_temporary_drop($columns, $old_schema, $old_type) . "\n"); $ofs->write("-- type " . $new_type['name'] . " definition migration (2/4): delete type list values\n"); $ofs->write(mssql10_type::get_enum_value_delete($old_schema, $old_type) . "\n"); $ofs->write("-- type " . $new_type['name'] . " definition migration (3/4): recreate type list values\n"); $ofs->write(mssql10_type::get_enum_value_insert($new_schema, $new_type) . "\n"); $ofs->write("-- type " . $new_type['name'] . " definition migration (4/4): restore dependant tables column constraint add\n"); $ofs->write(mssql10_type::column_constraint_restore($columns, $new_schema, $new_type) . "\n"); } }
/** * Outputs DDL for differences in functions * * @param $ofs1 stage1 output pointer * @param $ofs3 stage3 output pointer * @param $old_schema original schema * @param $new_schema new schema */ public static function diff_functions($ofs1, $ofs3, $old_schema, $new_schema) { // drop functions that no longer exist in stage 3 if ($old_schema != NULL) { foreach (dbx::get_functions($old_schema) as $old_function) { if (!mssql10_schema::contains_function($new_schema, mssql10_function::get_declaration($new_schema, $old_function))) { $ofs3->write(mssql10_function::get_drop_sql($old_schema, $old_function) . "\n"); } } } // Add new functions and replace modified functions foreach (dbx::get_functions($new_schema) as $new_function) { $old_function = NULL; if ($old_schema != NULL) { $old_function = dbx::get_function($old_schema, $new_function['name'], mssql10_function::get_declaration($new_schema, $new_function)); } if ($old_function == NULL) { $ofs1->write(mssql10_function::get_creation_sql($new_schema, $new_function) . "\n"); } else { if (!mssql10_function::equals($new_schema, $new_function, $old_function, mssql10_diff::$ignore_function_whitespace)) { // functions are not equal, old_function is not null, it previously existed // for MSSQL, there is no CREATE OR REPLACE FUNCTION, so drop the function explicitly $ofs1->write(mssql10_function::get_drop_sql($old_schema, $old_function) . "\n"); $ofs1->write(mssql10_function::get_creation_sql($new_schema, $new_function) . "\n"); } else { if (isset($new_function['forceRedefine']) && strcasecmp($new_function['forceRedefine'], 'true') == 0) { $ofs1->write("-- DBSteward insists on function recreation: " . $new_schema['name'] . "." . $new_function['name'] . " has forceRedefine set to true\n"); $ofs1->write(mssql10_function::get_creation_sql($new_schema, $new_function) . "\n"); } else { if (mssql10_schema::contains_type($new_schema, $new_function['returns']) && mssql10_schema::contains_type($old_schema, $new_function['returns']) && !mssql10_type::equals(dbx::get_type($old_schema, $new_function['returns']), dbx::get_type($new_schema, $new_function['returns']))) { $ofs1->write("-- dbstward insisting on function re-creation " . $new_function['name'] . " for type " . $new_function['returns'] . " definition change\n"); $ofs1->write(mssql10_function::get_drop_sql($old_schema, $old_function) . "\n"); $ofs1->write(mssql10_function::get_creation_sql($new_schema, $new_function) . "\n"); } } } } } }