/**
* Tests for PMA_getSQLToDropForeignKey() method.
*
* @return void
* @test
*/
public function testPMAGetSQLToDropForeignKey()
{
$table = "pma_table";
$fk = "pma_fk";
$this->assertEquals("ALTER TABLE `pma_table` DROP FOREIGN KEY `pma_fk`;", PMA_getSQLToDropForeignKey($table, $fk));
}
/**
* Function to handle update for a foreign key
*
* @param array $multi_edit_columns_name multu edit columns name
* @param string $master_field_md5 master field md5
* @param string $destination_foreign_table destination foreign table
* @param string $destination_foreign_column destination foreign column
* @param array $options_array options array
* @param array $existrel_foreign db, table, column
* @param string $table current table
* @param bool &$seen_error whether seen error
* @param string &$display_query display query
* @param string $foreign_db foreign database
*
* @return string
*/
function PMA_handleUpdateForForeignKey($multi_edit_columns_name, $master_field_md5, $destination_foreign_table, $destination_foreign_column, $options_array, $existrel_foreign, $table, &$seen_error, &$display_query, $foreign_db)
{
$html_output = '';
$create = false;
$drop = false;
// Map the fieldname's md5 back to its real name
$master_field = $multi_edit_columns_name[$master_field_md5];
$foreign_table = $destination_foreign_table[$master_field_md5];
$foreign_field = $destination_foreign_column[$master_field_md5];
if (!empty($foreign_db) && !empty($foreign_table) && !empty($foreign_field)) {
if (isset($existrel_foreign[$master_field])) {
$constraint_name = $existrel_foreign[$master_field]['constraint'];
$on_delete = !empty($existrel_foreign[$master_field]['on_delete']) ? $existrel_foreign[$master_field]['on_delete'] : 'RESTRICT';
$on_update = !empty($existrel_foreign[$master_field]['on_update']) ? $existrel_foreign[$master_field]['on_update'] : 'RESTRICT';
}
if (!isset($existrel_foreign[$master_field])) {
// no key defined for this field
$create = true;
} elseif ($existrel_foreign[$master_field]['foreign_db'] != $foreign_db || $existrel_foreign[$master_field]['foreign_table'] != $foreign_table || $existrel_foreign[$master_field]['foreign_field'] != $foreign_field || $_REQUEST['constraint_name'][$master_field_md5] != $constraint_name || $_REQUEST['on_delete'][$master_field_md5] != $on_delete || $_REQUEST['on_update'][$master_field_md5] != $on_update) {
// another foreign key is already defined for this field
// or an option has been changed for ON DELETE or ON UPDATE
$drop = true;
$create = true;
}
// end if... else....
} elseif (isset($existrel_foreign[$master_field])) {
$drop = true;
}
// end if... else....
$tmp_error_drop = false;
if ($drop) {
$drop_query = PMA_getSQLToDropForeignKey($table, $existrel_foreign[$master_field]['constraint']);
$display_query .= $drop_query . "\n";
$GLOBALS['dbi']->tryQuery($drop_query);
$tmp_error_drop = $GLOBALS['dbi']->getError();
if (!empty($tmp_error_drop)) {
$seen_error = true;
$html_output .= PMA_Util::mysqlDie($tmp_error_drop, $drop_query, false, '', false);
return $html_output;
}
}
$tmp_error_create = false;
if ($create) {
$create_query = PMA_getSQLToCreateForeignKey($table, $master_field, $foreign_db, $foreign_table, $foreign_field, $_REQUEST['constraint_name'][$master_field_md5], $options_array[$_REQUEST['on_delete'][$master_field_md5]], $options_array[$_REQUEST['on_update'][$master_field_md5]]);
$display_query .= $create_query . "\n";
$GLOBALS['dbi']->tryQuery($create_query);
$tmp_error_create = $GLOBALS['dbi']->getError();
if (!empty($tmp_error_create)) {
$seen_error = true;
if (substr($tmp_error_create, 1, 4) == '1005') {
$message = PMA_Message::error(__('Error creating foreign key on %1$s (check data types)'));
$message->addParam($master_field);
$html_output .= $message->getDisplay();
} else {
$html_output .= PMA_Util::mysqlDie($tmp_error_create, $create_query, false, '', false);
}
$html_output .= PMA_Util::showMySQLDocu('InnoDB_foreign_key_constraints') . "\n";
}
// this is an alteration and the old constraint has been dropped
// without creation of a new one
if ($drop && $create && empty($tmp_error_drop) && !empty($tmp_error_create)) {
// a rollback may be better here
$sql_query_recreate = '# Restoring the dropped constraint...' . "\n";
$sql_query_recreate .= PMA_getSQLToCreateForeignKey($table, $master_field, $existrel_foreign[$master_field]['foreign_db'], $existrel_foreign[$master_field]['foreign_table'], $existrel_foreign[$master_field]['foreign_field'], $existrel_foreign[$master_field]['constraint'], $options_array[$existrel_foreign[$master_field]['on_delete']], $options_array[$existrel_foreign[$master_field]['on_update']]);
$display_query .= $sql_query_recreate . "\n";
$GLOBALS['dbi']->tryQuery($sql_query_recreate);
}
}
return $html_output;
}
// no key defined for this field
$create = true;
} elseif (PMA_Util::backquote($existrel_foreign[$master_field]['foreign_db']) != $foreign_db || PMA_Util::backquote($existrel_foreign[$master_field]['foreign_table']) != $foreign_table || PMA_Util::backquote($existrel_foreign[$master_field]['foreign_field']) != $foreign_field || $_REQUEST['constraint_name'][$master_field_md5] != $existrel_foreign[$master_field]['constraint'] || $_REQUEST['on_delete'][$master_field_md5] != (!empty($existrel_foreign[$master_field]['on_delete']) ? $existrel_foreign[$master_field]['on_delete'] : 'RESTRICT') || $_REQUEST['on_update'][$master_field_md5] != (!empty($existrel_foreign[$master_field]['on_update']) ? $existrel_foreign[$master_field]['on_update'] : 'RESTRICT')) {
// another foreign key is already defined for this field
// or an option has been changed for ON DELETE or ON UPDATE
$drop = true;
$create = true;
}
// end if... else....
} elseif (isset($existrel_foreign[$master_field])) {
$drop = true;
}
// end if... else....
$tmp_error_drop = false;
if ($drop) {
$drop_query = PMA_getSQLToDropForeignKey($table, $existrel_foreign[$master_field]['constraint']);
$display_query .= $drop_query . "\n";
PMA_DBI_try_query($drop_query);
$tmp_error_drop = PMA_DBI_getError();
if (!empty($tmp_error_drop)) {
$seen_error = true;
$html_output .= PMA_Util::mysqlDie($tmp_error_drop, $drop_query, false, '', false);
continue;
}
}
$tmp_error_create = false;
if ($create) {
$create_query = PMA_getSQLToCreateForeignKey($table, $master_field, $foreign_db, $foreign_table, $foreign_field, $_REQUEST['constraint_name'][$master_field_md5], $options_array[$_REQUEST['on_delete'][$master_field_md5]], $options_array[$_REQUEST['on_update'][$master_field_md5]]);
$display_query .= $create_query . "\n";
PMA_DBI_try_query($create_query);
$tmp_error_create = PMA_DBI_getError();
