/**
* 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 $old_function) {
if (!mysql5_schema::contains_function($new_schema, mysql5_function::get_declaration($new_schema, $old_function))) {
$ofs3->write(mysql5_function::get_drop_sql($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, $new_function['name'], mysql5_function::get_declaration($new_schema, $new_function));
}
if ($old_function == null || !mysql5_function::equals($new_schema, $new_function, $old_function, mysql5_diff::$ignore_function_whitespace)) {
$ofs1->write(mysql5_function::get_creation_sql($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");
$ofs1->write(mysql5_function::get_creation_sql($new_schema, $new_function) . "\n");
} else {
if (mysql5_schema::contains_type($new_schema, $new_function['returns']) && mysql5_schema::contains_type($old_schema, $new_function['returns']) && !mysql5_type::equals(dbx::get_type($old_schema, $new_function['returns']), dbx::get_type($new_schema, $new_function['returns']))) {
$ofs1->write("-- Force function re-creation {$new_function['name']} for type: {$new_function['returns']}\n");
$ofs1->write(mysql5_function::get_creation_sql($new_schema, $new_function) . "\n");
}
}
}
}
}
private static function schema_contains_sequence($schema, $sequence_name, $include_oldnames = FALSE)
{
if (mysql5_schema::contains_sequence($schema, $sequence_name)) {
return TRUE;
}
foreach (dbx::get_tables($schema) as $table) {
foreach (mysql5_table::get_sequences_needed($schema, $table) as $sequence) {
if (strcasecmp($sequence['name'], $sequence_name) === 0) {
return TRUE;
}
if ($include_oldnames && !dbsteward::$ignore_oldnames && !empty($sequence['oldSequenceName']) && strcasecmp($sequence['oldSequenceName'], $sequence_name) === 0) {
return TRUE;
}
}
}
return FALSE;
}
/**
* Drop removed types
* Add new types
* Apply type definition differences, updating the type's tables along the way
*
* @param $ofs output segementer
* @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 || !mysql5_schema::contains_type($old_schema, $new_type['name'])) {
continue;
}
$old_type = dbx::get_type($old_schema, $new_type['name']);
// is there a difference between the old and new type definitions?
if (mysql5_type::equals($old_schema, $old_type, $new_schema, $new_type)) {
continue;
}
}
}
/**
* Drop tables in old_schema no longer defined in new_schema
*
* @param type $ofs
* @param type $old_schema
* @param type $new_schema
* @param type $old_table
* @param type $new_table
*/
public static function drop_tables($ofs, $old_schema, $new_schema, $old_table = null, $new_table = null)
{
if ($old_schema != null) {
if ($old_table != null) {
$tables = array($old_table);
} else {
$tables = dbx::get_tables($old_schema);
}
foreach ($tables as $table) {
// does the new schema contain the old table?
if (!mysql5_schema::contains_table($new_schema, $table['name'])) {
// if the table was renamed, don't drop it
if (!dbsteward::$ignore_oldnames && mysql5_schema::table_formerly_known_as(dbsteward::$new_database, $old_schema, $table, $reformed_schema, $reformed_table)) {
$old_table_name = mysql5::get_fully_qualified_table_name($old_schema['name'], $table['name']);
$reformed_table_name = mysql5::get_fully_qualified_table_name($reformed_schema['name'], $reformed_table['name']);
$ofs->write("-- DROP TABLE {$old_table_name} omitted: new table {$reformed_table_name} indicates it is her replacement\n");
} else {
$ofs->write(mysql5_table::get_drop_sql($old_schema, $table) . "\n");
}
}
}
}
}
