forked from GNUsocial/gnu-social
622 lines
19 KiB
PHP
622 lines
19 KiB
PHP
<?php
|
|
// This file is part of GNU social - https://www.gnu.org/software/social
|
|
//
|
|
// GNU social is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// GNU social is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
/**
|
|
* Database schema for MariaDB
|
|
*
|
|
* @category Database
|
|
* @package GNUsocial
|
|
* @author Evan Prodromou <evan@status.net>
|
|
* @copyright 2019 Free Software Foundation, Inc http://www.fsf.org
|
|
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
|
|
*/
|
|
|
|
defined('GNUSOCIAL') || die();
|
|
|
|
/**
|
|
* Class representing the database schema for MariaDB
|
|
*
|
|
* A class representing the database schema. Can be used to
|
|
* manipulate the schema -- especially for plugins and upgrade
|
|
* utilities.
|
|
*
|
|
* @copyright 2019 Free Software Foundation, Inc http://www.fsf.org
|
|
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
|
|
*/
|
|
class MysqlSchema extends Schema
|
|
{
|
|
public static $_single = null;
|
|
|
|
/**
|
|
* Main public entry point. Use this to get
|
|
* the singleton object.
|
|
*
|
|
* @param object|null $conn
|
|
* @param string|null dummy param
|
|
* @return Schema the (single) Schema object
|
|
*/
|
|
public static function get($conn = null, $_ = 'mysql')
|
|
{
|
|
if (empty(self::$_single)) {
|
|
self::$_single = new Schema($conn, 'mysql');
|
|
}
|
|
return self::$_single;
|
|
}
|
|
|
|
/**
|
|
* Returns a TableDef object for the table
|
|
* in the schema with the given name.
|
|
*
|
|
* Throws an exception if the table is not found.
|
|
*
|
|
* @param string $table Name of the table to get
|
|
*
|
|
* @return array of tabledef for that table.
|
|
* @throws PEAR_Exception
|
|
* @throws SchemaTableMissingException
|
|
*/
|
|
public function getTableDef($table)
|
|
{
|
|
$def = [];
|
|
$hasKeys = false;
|
|
|
|
// Pull column data from INFORMATION_SCHEMA
|
|
$columns = $this->fetchMetaInfo($table, 'COLUMNS', 'ORDINAL_POSITION');
|
|
if (count($columns) == 0) {
|
|
throw new SchemaTableMissingException("No such table: $table");
|
|
}
|
|
|
|
foreach ($columns as $row) {
|
|
$name = $row['COLUMN_NAME'];
|
|
$field = [];
|
|
|
|
$type = $field['type'] = $row['DATA_TYPE'];
|
|
|
|
switch ($type) {
|
|
case 'char':
|
|
case 'varchar':
|
|
if (!is_null($row['CHARACTER_MAXIMUM_LENGTH'])) {
|
|
$field['length'] = (int) $row['CHARACTER_MAXIMUM_LENGTH'];
|
|
}
|
|
break;
|
|
case 'decimal':
|
|
// Other int types may report these values, but they're irrelevant.
|
|
// Just ignore them!
|
|
if (!is_null($row['NUMERIC_PRECISION'])) {
|
|
$field['precision'] = (int) $row['NUMERIC_PRECISION'];
|
|
}
|
|
if (!is_null($row['NUMERIC_SCALE'])) {
|
|
$field['scale'] = (int) $row['NUMERIC_SCALE'];
|
|
}
|
|
break;
|
|
case 'enum':
|
|
$enum = preg_replace("/^enum\('(.+)'\)$/", '\1', $row['COLUMN_TYPE']);
|
|
$field['enum'] = explode("','", $enum);
|
|
break;
|
|
}
|
|
|
|
|
|
if ($row['IS_NULLABLE'] == 'NO') {
|
|
$field['not null'] = true;
|
|
}
|
|
$col_default = $row['COLUMN_DEFAULT'];
|
|
if (!is_null($col_default) && $col_default !== 'NULL') {
|
|
if ($this->isNumericType($field)) {
|
|
$field['default'] = (int) $col_default;
|
|
} elseif ($col_default === 'CURRENT_TIMESTAMP'
|
|
|| $col_default === 'current_timestamp()') {
|
|
// A hack for "datetime" fields
|
|
// Skip "timestamp" as they get a CURRENT_TIMESTAMP default implicitly
|
|
if ($type !== 'timestamp') {
|
|
$field['default'] = 'CURRENT_TIMESTAMP';
|
|
}
|
|
} else {
|
|
$match = "/^'(.*)'$/";
|
|
if (preg_match($match, $col_default)) {
|
|
$field['default'] = preg_replace($match, '\1', $col_default);
|
|
} else {
|
|
$field['default'] = $col_default;
|
|
}
|
|
}
|
|
}
|
|
if ($row['COLUMN_KEY'] !== null) {
|
|
// We'll need to look up key info...
|
|
$hasKeys = true;
|
|
}
|
|
if ($row['COLUMN_COMMENT'] !== null && $row['COLUMN_COMMENT'] != '') {
|
|
$field['description'] = $row['COLUMN_COMMENT'];
|
|
}
|
|
|
|
$extra = $row['EXTRA'];
|
|
if ($extra) {
|
|
if (preg_match('/(^|\s)auto_increment(\s|$)/i', $extra)) {
|
|
$field['auto_increment'] = true;
|
|
}
|
|
}
|
|
|
|
if (!empty($row['COLLATION_NAME'])) {
|
|
$field['collate'] = $row['COLLATION_NAME'];
|
|
}
|
|
|
|
$def['fields'][$name] = $field;
|
|
}
|
|
|
|
if ($hasKeys) {
|
|
$key_info = $this->fetchKeyInfo($table);
|
|
|
|
foreach ($key_info as $row) {
|
|
$key_name = $row['key_name'];
|
|
$cols = $row['cols'];
|
|
|
|
switch ($row['key_type']) {
|
|
case 'PRIMARY':
|
|
$def['primary key'] = $cols;
|
|
break;
|
|
case 'UNIQUE':
|
|
$def['unique keys'][$key_name] = $cols;
|
|
break;
|
|
case 'FULLTEXT':
|
|
$def['fulltext indexes'][$key_name] = $cols;
|
|
break;
|
|
default:
|
|
$def['indexes'][$key_name] = $cols;
|
|
}
|
|
}
|
|
}
|
|
|
|
$foreign_key_info = $this->fetchForeignKeyInfo($table);
|
|
|
|
foreach ($foreign_key_info as $row) {
|
|
$key_name = $row['key_name'];
|
|
$cols = $row['cols'];
|
|
$ref_table = $row['ref_table'];
|
|
|
|
$def['foreign keys'][$key_name] = [$ref_table, $cols];
|
|
}
|
|
return $def;
|
|
}
|
|
|
|
/**
|
|
* Pull the given table properties from INFORMATION_SCHEMA.
|
|
* Most of the good stuff is MySQL extensions.
|
|
*
|
|
* @param $table
|
|
* @param $props
|
|
* @return array
|
|
* @throws PEAR_Exception
|
|
* @throws SchemaTableMissingException
|
|
*/
|
|
public function getTableProperties($table, $props)
|
|
{
|
|
$data = $this->fetchMetaInfo($table, 'TABLES');
|
|
if ($data) {
|
|
return $data[0];
|
|
} else {
|
|
throw new SchemaTableMissingException("No such table: $table");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Pull some INFORMATION.SCHEMA data for the given table.
|
|
*
|
|
* @param string $table
|
|
* @param $infoTable
|
|
* @param null $orderBy
|
|
* @return array of arrays
|
|
* @throws PEAR_Exception
|
|
*/
|
|
public function fetchMetaInfo($table, $infoTable, $orderBy = null)
|
|
{
|
|
$schema = $this->conn->dsn['database'];
|
|
return $this->fetchQueryData(sprintf(
|
|
<<<'END'
|
|
SELECT * FROM INFORMATION_SCHEMA.%1$s
|
|
WHERE TABLE_SCHEMA = '%2$s' AND TABLE_NAME = '%3$s'%4$s;
|
|
END,
|
|
$this->quoteIdentifier($infoTable),
|
|
$schema,
|
|
$table,
|
|
($orderBy ? " ORDER BY {$orderBy}" : '')
|
|
));
|
|
}
|
|
|
|
/**
|
|
* Pull index and keys information for the given table.
|
|
*
|
|
* @param string $table
|
|
* @return array of arrays
|
|
* @throws PEAR_Exception
|
|
*/
|
|
private function fetchKeyInfo(string $table): array
|
|
{
|
|
$schema = $this->conn->dsn['database'];
|
|
$data = $this->fetchQueryData(
|
|
<<<EOT
|
|
SELECT INDEX_NAME AS `key_name`,
|
|
CASE
|
|
WHEN INDEX_NAME = 'PRIMARY' THEN 'PRIMARY'
|
|
WHEN NON_UNIQUE IS NOT TRUE THEN 'UNIQUE'
|
|
ELSE INDEX_TYPE
|
|
END AS `key_type`,
|
|
COLUMN_NAME AS `col`,
|
|
SUB_PART AS `col_length`
|
|
FROM INFORMATION_SCHEMA.STATISTICS
|
|
WHERE TABLE_SCHEMA = '{$schema}' AND TABLE_NAME = '{$table}'
|
|
ORDER BY `key_name`, `key_type`, SEQ_IN_INDEX;
|
|
EOT
|
|
);
|
|
|
|
$rows = [];
|
|
foreach ($data as $row) {
|
|
$name = $row['key_name'];
|
|
|
|
if (!is_null($row['col_length'])) {
|
|
$row['col'] = [$row['col'], (int) $row['col_length']];
|
|
}
|
|
unset($row['col_length']);
|
|
|
|
if (!array_key_exists($name, $rows)) {
|
|
$row['cols'] = [$row['col']];
|
|
|
|
unset($row['col']);
|
|
$rows[$name] = $row;
|
|
} else {
|
|
$rows[$name]['cols'][] = $row['col'];
|
|
}
|
|
}
|
|
|
|
return array_values($rows);
|
|
}
|
|
|
|
/**
|
|
* Pull foreign key information for the given table.
|
|
*
|
|
* @param string $table
|
|
* @return array array of arrays
|
|
* @throws PEAR_Exception
|
|
*/
|
|
private function fetchForeignKeyInfo(string $table): array
|
|
{
|
|
$schema = $this->conn->dsn['database'];
|
|
$data = $this->fetchQueryData(
|
|
<<<END
|
|
SELECT CONSTRAINT_NAME AS `key_name`,
|
|
COLUMN_NAME AS `col`,
|
|
REFERENCED_TABLE_NAME AS `ref_table`,
|
|
REFERENCED_COLUMN_NAME AS `ref_col`
|
|
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
|
|
WHERE TABLE_SCHEMA = '{$schema}'
|
|
AND TABLE_NAME = '{$table}'
|
|
AND REFERENCED_TABLE_SCHEMA = '{$schema}'
|
|
ORDER BY `key_name`, ORDINAL_POSITION;
|
|
END
|
|
);
|
|
|
|
$rows = [];
|
|
foreach ($data as $row) {
|
|
$name = $row['key_name'];
|
|
|
|
if (!array_key_exists($name, $rows)) {
|
|
$row['cols'] = [$row['col'] => $row['ref_col']];
|
|
|
|
unset($row['col']);
|
|
unset($row['ref_col']);
|
|
$rows[$name] = $row;
|
|
} else {
|
|
$rows[$name]['cols'][$row['col']] = $row['ref_col'];
|
|
}
|
|
}
|
|
|
|
return array_values($rows);
|
|
}
|
|
|
|
/**
|
|
* Append an SQL statement with an index definition for a full-text search
|
|
* index over one or more columns on a table.
|
|
*
|
|
* @param array $statements
|
|
* @param string $table
|
|
* @param string $name
|
|
* @param array $def
|
|
*/
|
|
public function appendCreateFulltextIndex(array &$statements, $table, $name, array $def)
|
|
{
|
|
$statements[] = "CREATE FULLTEXT INDEX $name ON $table " . $this->buildIndexList($def);
|
|
}
|
|
|
|
/**
|
|
* Append an SQL statement with an index definition for an advisory
|
|
* index over one or more columns on a table.
|
|
*
|
|
* @param array $statements
|
|
* @param string $table
|
|
* @param string $name
|
|
* @param array $def
|
|
*/
|
|
public function appendCreateIndex(array &$statements, $table, $name, array $def)
|
|
{
|
|
$statements[] = "ALTER TABLE {$this->quoteIdentifier($table)} "
|
|
. "ADD INDEX {$name} {$this->buildIndexList($def)}";
|
|
}
|
|
|
|
/**
|
|
* Close out a 'create table' SQL statement.
|
|
*
|
|
* @param string $name
|
|
* @param array $def
|
|
* @return string;
|
|
*
|
|
*/
|
|
public function endCreateTable($name, array $def)
|
|
{
|
|
$engine = $this->preferredEngine($def);
|
|
return ") ENGINE=$engine CHARACTER SET utf8mb4 COLLATE utf8mb4_bin";
|
|
}
|
|
|
|
public function preferredEngine($def)
|
|
{
|
|
return 'InnoDB';
|
|
}
|
|
|
|
/**
|
|
* Append phrase(s) to an array of partial ALTER TABLE chunks in order
|
|
* to alter the given column from its old state to a new one.
|
|
*
|
|
* @param array $phrase
|
|
* @param string $columnName
|
|
* @param array $old previous column definition as found in DB
|
|
* @param array $cd current column definition
|
|
*/
|
|
public function appendAlterModifyColumn(
|
|
array &$phrase,
|
|
string $columnName,
|
|
array $old,
|
|
array $cd
|
|
): void {
|
|
$phrase[] = 'MODIFY COLUMN ' . $this->quoteIdentifier($columnName)
|
|
. ' ' . $this->columnSql($columnName, $cd);
|
|
}
|
|
|
|
/**
|
|
* MySQL doesn't take 'DROP CONSTRAINT', need to treat primary keys as
|
|
* if they were indexes here, but can use 'PRIMARY KEY' special name.
|
|
*
|
|
* @param array $phrase
|
|
*/
|
|
public function appendAlterDropPrimary(array &$phrase, string $tableName)
|
|
{
|
|
$phrase[] = 'DROP PRIMARY KEY';
|
|
}
|
|
|
|
/**
|
|
* MySQL doesn't take 'DROP CONSTRAINT', need to treat unique keys as
|
|
* if they were indexes here.
|
|
*
|
|
* @param array $phrase
|
|
* @param string $keyName MySQL
|
|
*/
|
|
public function appendAlterDropUnique(array &$phrase, $keyName)
|
|
{
|
|
$phrase[] = 'DROP INDEX ' . $keyName;
|
|
}
|
|
|
|
public function appendAlterDropForeign(array &$phrase, $keyName)
|
|
{
|
|
$phrase[] = 'DROP FOREIGN KEY ' . $keyName;
|
|
}
|
|
|
|
/**
|
|
* Throw some table metadata onto the ALTER TABLE if we have a mismatch
|
|
* in expected type, collation.
|
|
* @param array $phrase
|
|
* @param $tableName
|
|
* @param array $def
|
|
* @throws Exception
|
|
*/
|
|
public function appendAlterExtras(array &$phrase, $tableName, array $def)
|
|
{
|
|
// Check for table properties: make sure we're using a sane
|
|
// engine type and collation.
|
|
// @fixme make the default engine configurable?
|
|
$oldProps = $this->getTableProperties($tableName, ['ENGINE', 'TABLE_COLLATION']);
|
|
$engine = $this->preferredEngine($def);
|
|
if (strtolower($oldProps['ENGINE']) != strtolower($engine)) {
|
|
$phrase[] = "ENGINE=$engine";
|
|
}
|
|
if (strtolower($oldProps['TABLE_COLLATION']) != 'utf8mb4_bin') {
|
|
$phrase[] = 'CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_bin';
|
|
$phrase[] = 'DEFAULT CHARACTER SET = utf8mb4';
|
|
$phrase[] = 'DEFAULT COLLATE = utf8mb4_bin';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Append an SQL statement to drop an index from a table.
|
|
* Note that in MariaDB index names are relation-specific.
|
|
*
|
|
* @param array $statements
|
|
* @param string $table
|
|
* @param string $name
|
|
*/
|
|
public function appendDropIndex(array &$statements, $table, $name)
|
|
{
|
|
$statements[] = "ALTER TABLE {$this->quoteIdentifier($table)} "
|
|
. "DROP INDEX {$name}";
|
|
}
|
|
|
|
private function isNumericType(array $cd): bool
|
|
{
|
|
$ints = array_map(
|
|
function ($s) {
|
|
return $s . 'int';
|
|
},
|
|
['tiny', 'small', 'medium', 'big']
|
|
);
|
|
$ints = array_merge($ints, ['int', 'numeric', 'serial']);
|
|
return in_array(strtolower($cd['type']), $ints);
|
|
}
|
|
|
|
/**
|
|
* Return the proper SQL for creating or
|
|
* altering a column.
|
|
*
|
|
* Appropriate for use in CREATE TABLE or
|
|
* ALTER TABLE statements.
|
|
*
|
|
* @param string $name column name to create
|
|
* @param array $cd column to create
|
|
*
|
|
* @return string correct SQL for that column
|
|
*/
|
|
public function columnSql(string $name, array $cd)
|
|
{
|
|
$line = [];
|
|
$line[] = parent::columnSql($name, $cd);
|
|
|
|
// This'll have been added from our transform of "serial" type
|
|
if (!empty($cd['auto_increment'])) {
|
|
$line[] = 'AUTO_INCREMENT';
|
|
}
|
|
|
|
if (!empty($cd['description'])) {
|
|
$line[] = 'COMMENT';
|
|
$line[] = $this->quoteValue($cd['description']);
|
|
}
|
|
|
|
return implode(' ', $line);
|
|
}
|
|
|
|
public function mapType($column)
|
|
{
|
|
$map = [
|
|
'integer' => 'int',
|
|
'numeric' => 'decimal',
|
|
'blob' => 'longblob',
|
|
];
|
|
|
|
$type = $column['type'];
|
|
if (array_key_exists($type, $map)) {
|
|
$type = $map[$type];
|
|
}
|
|
|
|
$size = $column['size'] ?? null;
|
|
switch ($type) {
|
|
case 'int':
|
|
if (in_array($size, ['tiny', 'small', 'medium', 'big'])) {
|
|
$type = $size . $type;
|
|
}
|
|
break;
|
|
case 'float':
|
|
if ($size === 'big') {
|
|
$type = 'double';
|
|
}
|
|
break;
|
|
case 'text':
|
|
if (in_array($size, ['tiny', 'medium', 'long'])) {
|
|
$type = $size . $type;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return $type;
|
|
}
|
|
|
|
/**
|
|
* Collation in MariaDB format from our format
|
|
*
|
|
* @param string $collate
|
|
* @return string
|
|
*/
|
|
protected function collationToMySQL(string $collate): string
|
|
{
|
|
if (!in_array($collate, [
|
|
'utf8_bin',
|
|
'utf8_general_cs',
|
|
'utf8_general_ci',
|
|
])) {
|
|
common_log(
|
|
LOG_ERR,
|
|
'Collation not supported: "' . $collate . '"'
|
|
);
|
|
$collate = 'utf8_bin';
|
|
}
|
|
|
|
if (substr($collate, 0, 13) === 'utf8_general_') {
|
|
$collate = 'utf8mb4_unicode_' . substr($collate, 13);
|
|
} elseif (substr($collate, 0, 5) === 'utf8_') {
|
|
$collate = 'utf8mb4_' . substr($collate, 5);
|
|
}
|
|
return $collate;
|
|
}
|
|
|
|
public function typeAndSize(string $name, array $column)
|
|
{
|
|
if ($column['type'] === 'enum') {
|
|
$vals = [];
|
|
foreach ($column['enum'] as &$val) {
|
|
$vals[] = "'{$val}'";
|
|
}
|
|
return 'enum(' . implode(',', $vals) . ')';
|
|
} elseif ($this->isStringType($column)) {
|
|
$col = parent::typeAndSize($name, $column);
|
|
if (!empty($column['collate'])) {
|
|
$col .= ' COLLATE ' . $column['collate'];
|
|
}
|
|
return $col;
|
|
} else {
|
|
return parent::typeAndSize($name, $column);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Filter the given table definition array to match features available
|
|
* in this database.
|
|
*
|
|
* This lets us strip out unsupported things like comments, foreign keys,
|
|
* or type variants that we wouldn't get back from getTableDef().
|
|
*
|
|
* @param string $tableName
|
|
* @param array $tableDef
|
|
* @return array
|
|
*/
|
|
public function filterDef(string $tableName, array $tableDef)
|
|
{
|
|
$tableDef = parent::filterDef($tableName, $tableDef);
|
|
|
|
foreach ($tableDef['fields'] as $name => &$col) {
|
|
switch ($col['type']) {
|
|
case 'serial':
|
|
$col['type'] = 'int';
|
|
$col['auto_increment'] = true;
|
|
break;
|
|
case 'bool':
|
|
$col['type'] = 'int';
|
|
$col['size'] = 'tiny';
|
|
$col['default'] = (int) $col['default'];
|
|
break;
|
|
}
|
|
|
|
if (!empty($col['collate'])) {
|
|
$col['collate'] = $this->collationToMySQL($col['collate']);
|
|
}
|
|
|
|
$col['type'] = $this->mapType($col);
|
|
unset($col['size']);
|
|
}
|
|
return $tableDef;
|
|
}
|
|
}
|