1069 lines
30 KiB
PHP
1069 lines
30 KiB
PHP
<?php
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/**
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* StatusNet, the distributed open-source microblogging tool
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*
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* Database schema utilities
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*
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* PHP version 5
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*
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* LICENCE: This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Database
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @copyright 2009 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
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if (!defined('STATUSNET')) {
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exit(1);
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}
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/**
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* Class representing the database schema
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*
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* A class representing the database schema. Can be used to
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* manipulate the schema -- especially for plugins and upgrade
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* utilities.
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*
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* @category Database
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @author Brion Vibber <brion@status.net>
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
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class Schema
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{
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static $_static = null;
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protected $conn = null;
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/**
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* Constructor. Only run once for singleton object.
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*/
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protected function __construct($conn = null)
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{
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if (is_null($conn)) {
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// XXX: there should be an easier way to do this.
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$user = new User();
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$conn = $user->getDatabaseConnection();
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$user->free();
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unset($user);
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}
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$this->conn = $conn;
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}
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/**
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* Main public entry point. Use this to get
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* the schema object.
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*
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* @return Schema the Schema object for the connection
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*/
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static function get($conn = null)
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{
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if (is_null($conn)) {
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$key = 'default';
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} else {
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$key = md5(serialize($conn->dsn));
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}
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$type = common_config('db', 'type');
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if (empty(self::$_static[$key])) {
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$schemaClass = ucfirst($type).'Schema';
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self::$_static[$key] = new $schemaClass($conn);
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}
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return self::$_static[$key];
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}
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/**
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* Gets a ColumnDef object for a single column.
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*
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* Throws an exception if the table is not found.
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*
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* @param string $table name of the table
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* @param string $column name of the column
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*
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* @return ColumnDef definition of the column or null
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* if not found.
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*/
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public function getColumnDef($table, $column)
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{
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$td = $this->getTableDef($table);
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if (!empty($td) && !empty($td->columns)) {
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foreach ($td->columns as $cd) {
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if ($cd->name == $column) {
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return $cd;
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}
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}
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}
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return null;
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}
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/**
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* Creates a table with the given names and columns.
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*
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* @param string $tableName Name of the table
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* @param array $def Table definition array listing fields and indexes.
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*
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* @return boolean success flag
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*/
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public function createTable($tableName, $def)
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{
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$statements = $this->buildCreateTable($tableName, $def);
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return $this->runSqlSet($statements);
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}
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/**
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* Build a set of SQL statements to create a table with the given
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* name and columns.
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*
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* @param string $name Name of the table
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* @param array $def Table definition array
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*
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* @return boolean success flag
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*/
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public function buildCreateTable($name, $def)
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{
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$def = $this->validateDef($name, $def);
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$def = $this->filterDef($def);
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$sql = array();
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foreach ($def['fields'] as $col => $colDef) {
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$this->appendColumnDef($sql, $col, $colDef);
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}
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// Primary, unique, and foreign keys are constraints, so go within
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// the CREATE TABLE statement normally.
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if (!empty($def['primary key'])) {
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$this->appendPrimaryKeyDef($sql, $def['primary key']);
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}
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if (!empty($def['unique keys'])) {
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foreach ($def['unique keys'] as $col => $colDef) {
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$this->appendUniqueKeyDef($sql, $col, $colDef);
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}
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}
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if (!empty($def['foreign keys'])) {
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foreach ($def['foreign keys'] as $keyName => $keyDef) {
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$this->appendForeignKeyDef($sql, $keyName, $keyDef);
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}
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}
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// Wrap the CREATE TABLE around the main body chunks...
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$statements = array();
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$statements[] = $this->startCreateTable($name, $def) . "\n" .
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implode($sql, ",\n") . "\n" .
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$this->endCreateTable($name, $def);
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// Multi-value indexes are advisory and for best portability
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// should be created as separate statements.
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if (!empty($def['indexes'])) {
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foreach ($def['indexes'] as $col => $colDef) {
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$this->appendCreateIndex($statements, $name, $col, $colDef);
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}
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}
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if (!empty($def['fulltext indexes'])) {
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foreach ($def['fulltext indexes'] as $col => $colDef) {
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$this->appendCreateFulltextIndex($statements, $name, $col, $colDef);
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}
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}
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return $statements;
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}
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/**
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* Set up a 'create table' SQL statement.
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*
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* @param string $name table name
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* @param array $def table definition
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* @param $string
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*/
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function startCreateTable($name, array $def)
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{
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return 'CREATE TABLE ' . $this->quoteIdentifier($name) . ' (';
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}
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/**
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* Close out a 'create table' SQL statement.
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*
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* @param string $name table name
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* @param array $def table definition
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* @return string
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*/
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function endCreateTable($name, array $def)
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{
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return ')';
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}
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/**
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* Append an SQL fragment with a column definition in a CREATE TABLE statement.
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*
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* @param array $sql
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* @param string $name
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* @param array $def
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*/
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function appendColumnDef(array &$sql, $name, array $def)
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{
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$sql[] = "$name " . $this->columnSql($def);
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}
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/**
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* Append an SQL fragment with a constraint definition for a primary
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* key in a CREATE TABLE statement.
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*
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* @param array $sql
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* @param array $def
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*/
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function appendPrimaryKeyDef(array &$sql, array $def)
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{
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$sql[] = "PRIMARY KEY " . $this->buildIndexList($def);
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}
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/**
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* Append an SQL fragment with a constraint definition for a unique
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* key in a CREATE TABLE statement.
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*
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* @param array $sql
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* @param string $name
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* @param array $def
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*/
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function appendUniqueKeyDef(array &$sql, $name, array $def)
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{
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$sql[] = "CONSTRAINT $name UNIQUE " . $this->buildIndexList($def);
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}
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/**
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* Append an SQL fragment with a constraint definition for a foreign
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* key in a CREATE TABLE statement.
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*
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* @param array $sql
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* @param string $name
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* @param array $def
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*/
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function appendForeignKeyDef(array &$sql, $name, array $def)
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{
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if (count($def) != 2) {
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throw new Exception("Invalid foreign key def for $name: " . var_export($def, true));
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}
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list($refTable, $map) = $def;
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$srcCols = array_keys($map);
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$refCols = array_values($map);
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$sql[] = "CONSTRAINT $name FOREIGN KEY " .
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$this->buildIndexList($srcCols) .
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" REFERENCES " .
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$this->quoteIdentifier($refTable) .
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" " .
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$this->buildIndexList($refCols);
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}
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/**
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* Append an SQL statement with an index definition for an advisory
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* index over one or more columns on a table.
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*
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* @param array $statements
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* @param string $table
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* @param string $name
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* @param array $def
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*/
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function appendCreateIndex(array &$statements, $table, $name, array $def)
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{
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$statements[] = "CREATE INDEX $name ON $table " . $this->buildIndexList($def);
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}
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/**
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* Append an SQL statement with an index definition for a full-text search
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* index over one or more columns on a table.
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*
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* @param array $statements
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* @param string $table
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* @param string $name
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* @param array $def
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*/
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function appendCreateFulltextIndex(array &$statements, $table, $name, array $def)
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{
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throw new Exception("Fulltext index not supported in this database");
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}
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/**
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* Append an SQL statement to drop an index from a table.
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*
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* @param array $statements
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* @param string $table
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* @param string $name
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* @param array $def
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*/
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function appendDropIndex(array &$statements, $table, $name)
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{
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$statements[] = "DROP INDEX $name ON " . $this->quoteIdentifier($table);
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}
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function buildIndexList(array $def)
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{
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// @fixme
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return '(' . implode(',', array_map(array($this, 'buildIndexItem'), $def)) . ')';
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}
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function buildIndexItem($def)
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{
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if (is_array($def)) {
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list($name, $size) = $def;
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return $this->quoteIdentifier($name) . '(' . intval($size) . ')';
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}
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return $this->quoteIdentifier($def);
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}
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/**
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* Drops a table from the schema
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*
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* Throws an exception if the table is not found.
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*
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* @param string $name Name of the table to drop
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*
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* @return boolean success flag
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*/
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public function dropTable($name)
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{
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global $_PEAR;
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$res = $this->conn->query("DROP TABLE $name");
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if ($_PEAR->isError($res)) {
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PEAR_ErrorToPEAR_Exception($res);
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}
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return true;
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}
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/**
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* Adds an index to a table.
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*
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* If no name is provided, a name will be made up based
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* on the table name and column names.
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*
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* Throws an exception on database error, esp. if the table
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* does not exist.
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*
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* @param string $table Name of the table
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* @param array $columnNames Name of columns to index
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* @param string $name (Optional) name of the index
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*
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* @return boolean success flag
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*/
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public function createIndex($table, $columnNames, $name=null)
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{
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global $_PEAR;
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if (!is_array($columnNames)) {
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$columnNames = array($columnNames);
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}
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if (empty($name)) {
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$name = "{$table}_".implode("_", $columnNames)."_idx";
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}
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$res = $this->conn->query("ALTER TABLE $table ".
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"ADD INDEX $name (".
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implode(",", $columnNames).")");
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if ($_PEAR->isError($res)) {
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PEAR_ErrorToPEAR_Exception($res);
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}
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return true;
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}
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/**
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* Drops a named index from a table.
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*
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* @param string $table name of the table the index is on.
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* @param string $name name of the index
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*
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* @return boolean success flag
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*/
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public function dropIndex($table, $name)
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{
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global $_PEAR;
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$res = $this->conn->query("ALTER TABLE $table DROP INDEX $name");
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if ($_PEAR->isError($res)) {
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PEAR_ErrorToPEAR_Exception($res);
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}
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return true;
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}
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/**
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* Adds a column to a table
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*
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* @param string $table name of the table
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* @param ColumnDef $columndef Definition of the new
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* column.
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*
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* @return boolean success flag
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*/
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public function addColumn($table, $columndef)
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{
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global $_PEAR;
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$sql = "ALTER TABLE $table ADD COLUMN " . $this->_columnSql($columndef);
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$res = $this->conn->query($sql);
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if ($_PEAR->isError($res)) {
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PEAR_ErrorToPEAR_Exception($res);
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}
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return true;
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}
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/**
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* Modifies a column in the schema.
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*
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* The name must match an existing column and table.
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*
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* @param string $table name of the table
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* @param ColumnDef $columndef new definition of the column.
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*
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* @return boolean success flag
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*/
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public function modifyColumn($table, $columndef)
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{
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global $_PEAR;
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$sql = "ALTER TABLE $table MODIFY COLUMN " .
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$this->_columnSql($columndef);
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$res = $this->conn->query($sql);
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if ($_PEAR->isError($res)) {
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PEAR_ErrorToPEAR_Exception($res);
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}
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return true;
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}
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/**
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* Drops a column from a table
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*
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* The name must match an existing column.
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*
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* @param string $table name of the table
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* @param string $columnName name of the column to drop
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*
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* @return boolean success flag
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*/
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public function dropColumn($table, $columnName)
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{
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global $_PEAR;
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$sql = "ALTER TABLE $table DROP COLUMN $columnName";
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$res = $this->conn->query($sql);
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if ($_PEAR->isError($res)) {
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PEAR_ErrorToPEAR_Exception($res);
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}
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return true;
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}
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/**
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* Ensures that a table exists with the given
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* name and the given column definitions.
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*
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* If the table does not yet exist, it will
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* create the table. If it does exist, it will
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* alter the table to match the column definitions.
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*
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* @param string $tableName name of the table
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* @param array $def Table definition array
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*
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* @return boolean success flag
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*/
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public function ensureTable($tableName, $def)
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{
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$statements = $this->buildEnsureTable($tableName, $def);
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return $this->runSqlSet($statements);
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}
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|
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/**
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* Run a given set of SQL commands on the connection in sequence.
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* Empty input is ok.
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*
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* @fixme if multiple statements, wrap in a transaction?
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* @param array $statements
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* @return boolean success flag
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*/
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function runSqlSet(array $statements)
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{
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global $_PEAR;
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|
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$ok = true;
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foreach ($statements as $sql) {
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if (defined('DEBUG_INSTALLER')) {
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echo "<tt>" . htmlspecialchars($sql) . "</tt><br/>\n";
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}
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$res = $this->conn->query($sql);
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if ($_PEAR->isError($res)) {
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common_debug('PEAR exception on query: '.$sql);
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PEAR_ErrorToPEAR_Exception($res);
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}
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|
}
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return $ok;
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}
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|
|
|
/**
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|
* Check a table's status, and if needed build a set
|
|
* of SQL statements which change it to be consistent
|
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* with the given table definition.
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*
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* If the table does not yet exist, statements will
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* be returned to create the table. If it does exist,
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* statements will be returned to alter the table to
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* match the column definitions.
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*
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* @param string $tableName name of the table
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|
* @param array $columns array of ColumnDef
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* objects for the table
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*
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* @return array of SQL statements
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*/
|
|
|
|
function buildEnsureTable($tableName, array $def)
|
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{
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try {
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$old = $this->getTableDef($tableName);
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} catch (SchemaTableMissingException $e) {
|
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return $this->buildCreateTable($tableName, $def);
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}
|
|
|
|
// Filter the DB-independent table definition to match the current
|
|
// database engine's features and limitations.
|
|
$def = $this->validateDef($tableName, $def);
|
|
$def = $this->filterDef($def);
|
|
|
|
$statements = array();
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|
$fields = $this->diffArrays($old, $def, 'fields', array($this, 'columnsEqual'));
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|
$uniques = $this->diffArrays($old, $def, 'unique keys');
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|
$indexes = $this->diffArrays($old, $def, 'indexes');
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|
$foreign = $this->diffArrays($old, $def, 'foreign keys');
|
|
$fulltext = $this->diffArrays($old, $def, 'fulltext indexes');
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|
|
|
// Drop any obsolete or modified indexes ahead...
|
|
foreach ($indexes['del'] + $indexes['mod'] as $indexName) {
|
|
$this->appendDropIndex($statements, $tableName, $indexName);
|
|
}
|
|
|
|
// Drop any obsolete or modified fulltext indexes ahead...
|
|
foreach ($fulltext['del'] + $fulltext['mod'] as $indexName) {
|
|
$this->appendDropIndex($statements, $tableName, $indexName);
|
|
}
|
|
|
|
// For efficiency, we want this all in one
|
|
// query, instead of using our methods.
|
|
|
|
$phrase = array();
|
|
|
|
foreach ($foreign['del'] + $foreign['mod'] as $keyName) {
|
|
$this->appendAlterDropForeign($phrase, $keyName);
|
|
}
|
|
|
|
foreach ($uniques['del'] + $uniques['mod'] as $keyName) {
|
|
$this->appendAlterDropUnique($phrase, $keyName);
|
|
}
|
|
|
|
if (isset($old['primary key']) && (!isset($def['primary key']) || $def['primary key'] != $old['primary key'])) {
|
|
$this->appendAlterDropPrimary($phrase);
|
|
}
|
|
|
|
foreach ($fields['add'] as $columnName) {
|
|
$this->appendAlterAddColumn($phrase, $columnName,
|
|
$def['fields'][$columnName]);
|
|
}
|
|
|
|
foreach ($fields['mod'] as $columnName) {
|
|
$this->appendAlterModifyColumn($phrase, $columnName,
|
|
$old['fields'][$columnName],
|
|
$def['fields'][$columnName]);
|
|
}
|
|
|
|
foreach ($fields['del'] as $columnName) {
|
|
$this->appendAlterDropColumn($phrase, $columnName);
|
|
}
|
|
|
|
if (isset($def['primary key']) && (!isset($old['primary key']) || $old['primary key'] != $def['primary key'])) {
|
|
$this->appendAlterAddPrimary($phrase, $def['primary key']);
|
|
}
|
|
|
|
foreach ($uniques['mod'] + $uniques['add'] as $keyName) {
|
|
$this->appendAlterAddUnique($phrase, $keyName, $def['unique keys'][$keyName]);
|
|
}
|
|
|
|
foreach ($foreign['mod'] + $foreign['add'] as $keyName) {
|
|
$this->appendAlterAddForeign($phrase, $keyName, $def['foreign keys'][$keyName]);
|
|
}
|
|
|
|
$this->appendAlterExtras($phrase, $tableName, $def);
|
|
|
|
if (count($phrase) > 0) {
|
|
$sql = 'ALTER TABLE ' . $tableName . ' ' . implode(",\n", $phrase);
|
|
$statements[] = $sql;
|
|
}
|
|
|
|
// Now create any indexes...
|
|
foreach ($indexes['mod'] + $indexes['add'] as $indexName) {
|
|
$this->appendCreateIndex($statements, $tableName, $indexName, $def['indexes'][$indexName]);
|
|
}
|
|
|
|
foreach ($fulltext['mod'] + $fulltext['add'] as $indexName) {
|
|
$colDef = $def['fulltext indexes'][$indexName];
|
|
$this->appendCreateFulltextIndex($statements, $tableName, $indexName, $colDef);
|
|
}
|
|
|
|
return $statements;
|
|
}
|
|
|
|
function diffArrays($oldDef, $newDef, $section, $compareCallback=null)
|
|
{
|
|
$old = isset($oldDef[$section]) ? $oldDef[$section] : array();
|
|
$new = isset($newDef[$section]) ? $newDef[$section] : array();
|
|
|
|
$oldKeys = array_keys($old);
|
|
$newKeys = array_keys($new);
|
|
|
|
$toadd = array_diff($newKeys, $oldKeys);
|
|
$todrop = array_diff($oldKeys, $newKeys);
|
|
$same = array_intersect($newKeys, $oldKeys);
|
|
$tomod = array();
|
|
$tokeep = array();
|
|
|
|
// Find which fields have actually changed definition
|
|
// in a way that we need to tweak them for this DB type.
|
|
foreach ($same as $name) {
|
|
if ($compareCallback) {
|
|
$same = call_user_func($compareCallback, $old[$name], $new[$name]);
|
|
} else {
|
|
$same = ($old[$name] == $new[$name]);
|
|
}
|
|
if ($same) {
|
|
$tokeep[] = $name;
|
|
continue;
|
|
}
|
|
$tomod[] = $name;
|
|
}
|
|
return array('add' => $toadd,
|
|
'del' => $todrop,
|
|
'mod' => $tomod,
|
|
'keep' => $tokeep,
|
|
'count' => count($toadd) + count($todrop) + count($tomod));
|
|
}
|
|
|
|
/**
|
|
* Append phrase(s) to an array of partial ALTER TABLE chunks in order
|
|
* to add the given column definition to the table.
|
|
*
|
|
* @param array $phrase
|
|
* @param string $columnName
|
|
* @param array $cd
|
|
*/
|
|
function appendAlterAddColumn(array &$phrase, $columnName, array $cd)
|
|
{
|
|
$phrase[] = 'ADD COLUMN ' .
|
|
$this->quoteIdentifier($columnName) .
|
|
' ' .
|
|
$this->columnSql($cd);
|
|
}
|
|
|
|
/**
|
|
* 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 $cd current column definition
|
|
*/
|
|
function appendAlterModifyColumn(array &$phrase, $columnName, array $old, array $cd)
|
|
{
|
|
$phrase[] = 'MODIFY COLUMN ' .
|
|
$this->quoteIdentifier($columnName) .
|
|
' ' .
|
|
$this->columnSql($cd);
|
|
}
|
|
|
|
/**
|
|
* Append phrase(s) to an array of partial ALTER TABLE chunks in order
|
|
* to drop the given column definition from the table.
|
|
*
|
|
* @param array $phrase
|
|
* @param string $columnName
|
|
*/
|
|
function appendAlterDropColumn(array &$phrase, $columnName)
|
|
{
|
|
$phrase[] = 'DROP COLUMN ' . $this->quoteIdentifier($columnName);
|
|
}
|
|
|
|
function appendAlterAddUnique(array &$phrase, $keyName, array $def)
|
|
{
|
|
$sql = array();
|
|
$sql[] = 'ADD';
|
|
$this->appendUniqueKeyDef($sql, $keyName, $def);
|
|
$phrase[] = implode(' ', $sql);
|
|
}
|
|
|
|
function appendAlterAddForeign(array &$phrase, $keyName, array $def)
|
|
{
|
|
$sql = array();
|
|
$sql[] = 'ADD';
|
|
$this->appendForeignKeyDef($sql, $keyName, $def);
|
|
$phrase[] = implode(' ', $sql);
|
|
}
|
|
|
|
function appendAlterAddPrimary(array &$phrase, array $def)
|
|
{
|
|
$sql = array();
|
|
$sql[] = 'ADD';
|
|
$this->appendPrimaryKeyDef($sql, $def);
|
|
$phrase[] = implode(' ', $sql);
|
|
}
|
|
|
|
function appendAlterDropPrimary(array &$phrase)
|
|
{
|
|
$phrase[] = 'DROP CONSTRAINT PRIMARY KEY';
|
|
}
|
|
|
|
function appendAlterDropUnique(array &$phrase, $keyName)
|
|
{
|
|
$phrase[] = 'DROP CONSTRAINT ' . $keyName;
|
|
}
|
|
|
|
function appendAlterDropForeign(array &$phrase, $keyName)
|
|
{
|
|
$phrase[] = 'DROP FOREIGN KEY ' . $keyName;
|
|
}
|
|
|
|
function appendAlterExtras(array &$phrase, $tableName, array $def)
|
|
{
|
|
// no-op
|
|
}
|
|
|
|
/**
|
|
* Quote a db/table/column identifier if necessary.
|
|
*
|
|
* @param string $name
|
|
* @return string
|
|
*/
|
|
function quoteIdentifier($name)
|
|
{
|
|
return $name;
|
|
}
|
|
|
|
function quoteDefaultValue($cd)
|
|
{
|
|
if ($cd['type'] == 'datetime' && $cd['default'] == 'CURRENT_TIMESTAMP') {
|
|
return $cd['default'];
|
|
} else {
|
|
return $this->quoteValue($cd['default']);
|
|
}
|
|
}
|
|
|
|
function quoteValue($val)
|
|
{
|
|
return $this->conn->quoteSmart($val);
|
|
}
|
|
|
|
/**
|
|
* Check if two column definitions are equivalent.
|
|
* The default implementation checks _everything_ but in many cases
|
|
* you may be able to discard a bunch of equivalencies.
|
|
*
|
|
* @param array $a
|
|
* @param array $b
|
|
* @return boolean
|
|
*/
|
|
function columnsEqual(array $a, array $b)
|
|
{
|
|
return !array_diff_assoc($a, $b) && !array_diff_assoc($b, $a);
|
|
}
|
|
|
|
/**
|
|
* Returns the array of names from an array of
|
|
* ColumnDef objects.
|
|
*
|
|
* @param array $cds array of ColumnDef objects
|
|
*
|
|
* @return array strings for name values
|
|
*/
|
|
|
|
protected function _names($cds)
|
|
{
|
|
$names = array();
|
|
|
|
foreach ($cds as $cd) {
|
|
$names[] = $cd->name;
|
|
}
|
|
|
|
return $names;
|
|
}
|
|
|
|
/**
|
|
* Get a ColumnDef from an array matching
|
|
* name.
|
|
*
|
|
* @param array $cds Array of ColumnDef objects
|
|
* @param string $name Name of the column
|
|
*
|
|
* @return ColumnDef matching item or null if no match.
|
|
*/
|
|
|
|
protected function _byName($cds, $name)
|
|
{
|
|
foreach ($cds as $cd) {
|
|
if ($cd->name == $name) {
|
|
return $cd;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Return the proper SQL for creating or
|
|
* altering a column.
|
|
*
|
|
* Appropriate for use in CREATE TABLE or
|
|
* ALTER TABLE statements.
|
|
*
|
|
* @param ColumnDef $cd column to create
|
|
*
|
|
* @return string correct SQL for that column
|
|
*/
|
|
|
|
function columnSql(array $cd)
|
|
{
|
|
$line = array();
|
|
$line[] = $this->typeAndSize($cd);
|
|
|
|
if (isset($cd['default'])) {
|
|
$line[] = 'default';
|
|
$line[] = $this->quoteDefaultValue($cd);
|
|
} else if (!empty($cd['not null'])) {
|
|
// Can't have both not null AND default!
|
|
$line[] = 'not null';
|
|
}
|
|
|
|
return implode(' ', $line);
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param string $column canonical type name in defs
|
|
* @return string native DB type name
|
|
*/
|
|
function mapType($column)
|
|
{
|
|
return $column;
|
|
}
|
|
|
|
function typeAndSize($column)
|
|
{
|
|
//$type = $this->mapType($column);
|
|
$type = $column['type'];
|
|
if (isset($column['size'])) {
|
|
$type = $column['size'] . $type;
|
|
}
|
|
$lengths = array();
|
|
|
|
if (isset($column['precision'])) {
|
|
$lengths[] = $column['precision'];
|
|
if (isset($column['scale'])) {
|
|
$lengths[] = $column['scale'];
|
|
}
|
|
} else if (isset($column['length'])) {
|
|
$lengths[] = $column['length'];
|
|
}
|
|
|
|
if ($lengths) {
|
|
return $type . '(' . implode(',', $lengths) . ')';
|
|
} else {
|
|
return $type;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Convert an old-style set of ColumnDef objects into the current
|
|
* Drupal-style schema definition array, for backwards compatibility
|
|
* with plugins written for 0.9.x.
|
|
*
|
|
* @param string $tableName
|
|
* @param array $defs: array of ColumnDef objects
|
|
* @return array
|
|
*/
|
|
protected function oldToNew($tableName, array $defs)
|
|
{
|
|
$table = array();
|
|
$prefixes = array(
|
|
'tiny',
|
|
'small',
|
|
'medium',
|
|
'big',
|
|
);
|
|
foreach ($defs as $cd) {
|
|
$column = array();
|
|
$column['type'] = $cd->type;
|
|
foreach ($prefixes as $prefix) {
|
|
if (substr($cd->type, 0, strlen($prefix)) == $prefix) {
|
|
$column['type'] = substr($cd->type, strlen($prefix));
|
|
$column['size'] = $prefix;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ($cd->size) {
|
|
if ($cd->type == 'varchar' || $cd->type == 'char') {
|
|
$column['length'] = $cd->size;
|
|
}
|
|
}
|
|
if (!$cd->nullable) {
|
|
$column['not null'] = true;
|
|
}
|
|
if ($cd->auto_increment) {
|
|
$column['type'] = 'serial';
|
|
}
|
|
if ($cd->default) {
|
|
$column['default'] = $cd->default;
|
|
}
|
|
$table['fields'][$cd->name] = $column;
|
|
|
|
if ($cd->key == 'PRI') {
|
|
// If multiple columns are defined as primary key,
|
|
// we'll pile them on in sequence.
|
|
if (!isset($table['primary key'])) {
|
|
$table['primary key'] = array();
|
|
}
|
|
$table['primary key'][] = $cd->name;
|
|
} else if ($cd->key == 'MUL') {
|
|
// Individual multiple-value indexes are only per-column
|
|
// using the old ColumnDef syntax.
|
|
$idx = "{$tableName}_{$cd->name}_idx";
|
|
$table['indexes'][$idx] = array($cd->name);
|
|
} else if ($cd->key == 'UNI') {
|
|
// Individual unique-value indexes are only per-column
|
|
// using the old ColumnDef syntax.
|
|
$idx = "{$tableName}_{$cd->name}_idx";
|
|
$table['unique keys'][$idx] = array($cd->name);
|
|
}
|
|
}
|
|
|
|
return $table;
|
|
}
|
|
|
|
/**
|
|
* 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 array $tableDef
|
|
*/
|
|
function filterDef(array $tableDef)
|
|
{
|
|
return $tableDef;
|
|
}
|
|
|
|
/**
|
|
* Validate a table definition array, checking for basic structure.
|
|
*
|
|
* If necessary, converts from an old-style array of ColumnDef objects.
|
|
*
|
|
* @param string $tableName
|
|
* @param array $def: table definition array
|
|
* @return array validated table definition array
|
|
*
|
|
* @throws Exception on wildly invalid input
|
|
*/
|
|
function validateDef($tableName, array $def)
|
|
{
|
|
if (isset($def[0]) && $def[0] instanceof ColumnDef) {
|
|
$def = $this->oldToNew($tableName, $def);
|
|
}
|
|
|
|
// A few quick checks :D
|
|
if (!isset($def['fields'])) {
|
|
throw new Exception("Invalid table definition for $tableName: no fields.");
|
|
}
|
|
|
|
return $def;
|
|
}
|
|
|
|
function isNumericType($type)
|
|
{
|
|
$type = strtolower($type);
|
|
$known = array('int', 'serial', 'numeric');
|
|
return in_array($type, $known);
|
|
}
|
|
|
|
/**
|
|
* Pull info from the query into a fun-fun array of dooooom
|
|
*
|
|
* @param string $sql
|
|
* @return array of arrays
|
|
*/
|
|
protected function fetchQueryData($sql)
|
|
{
|
|
global $_PEAR;
|
|
|
|
$res = $this->conn->query($sql);
|
|
if ($_PEAR->isError($res)) {
|
|
PEAR_ErrorToPEAR_Exception($res);
|
|
}
|
|
|
|
$out = array();
|
|
$row = array();
|
|
while ($res->fetchInto($row, DB_FETCHMODE_ASSOC)) {
|
|
$out[] = $row;
|
|
}
|
|
$res->free();
|
|
|
|
return $out;
|
|
}
|
|
|
|
}
|
|
|
|
class SchemaTableMissingException extends Exception
|
|
{
|
|
// no-op
|
|
}
|
|
|