887 lines
24 KiB
PHP
887 lines
24 KiB
PHP
<?php
|
|
/**
|
|
* StatusNet, the distributed open-source microblogging tool
|
|
*
|
|
* Database schema utilities
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* LICENCE: This program 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.
|
|
*
|
|
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* @category Database
|
|
* @package StatusNet
|
|
* @author Evan Prodromou <evan@status.net>
|
|
* @copyright 2009 StatusNet, Inc.
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
|
|
* @link http://status.net/
|
|
*/
|
|
|
|
if (!defined('STATUSNET')) {
|
|
exit(1);
|
|
}
|
|
|
|
/**
|
|
* Class representing the database schema
|
|
*
|
|
* A class representing the database schema. Can be used to
|
|
* manipulate the schema -- especially for plugins and upgrade
|
|
* utilities.
|
|
*
|
|
* @category Database
|
|
* @package StatusNet
|
|
* @author Evan Prodromou <evan@status.net>
|
|
* @author Brion Vibber <brion@status.net>
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
|
|
* @link http://status.net/
|
|
*/
|
|
|
|
class Schema
|
|
{
|
|
static $_static = null;
|
|
protected $conn = null;
|
|
|
|
/**
|
|
* Constructor. Only run once for singleton object.
|
|
*/
|
|
|
|
protected function __construct($conn = null)
|
|
{
|
|
if (is_null($conn)) {
|
|
// XXX: there should be an easier way to do this.
|
|
$user = new User();
|
|
$conn = $user->getDatabaseConnection();
|
|
$user->free();
|
|
unset($user);
|
|
}
|
|
|
|
$this->conn = $conn;
|
|
}
|
|
|
|
/**
|
|
* Main public entry point. Use this to get
|
|
* the schema object.
|
|
*
|
|
* @return Schema the Schema object for the connection
|
|
*/
|
|
|
|
static function get($conn = null)
|
|
{
|
|
if (is_null($conn)) {
|
|
$key = 'default';
|
|
} else {
|
|
$key = md5(serialize($conn->dsn));
|
|
}
|
|
|
|
$type = common_config('db', 'type');
|
|
if (empty(self::$_static[$key])) {
|
|
$schemaClass = ucfirst($type).'Schema';
|
|
self::$_static[$key] = new $schemaClass($conn);
|
|
}
|
|
return self::$_static[$key];
|
|
}
|
|
|
|
/**
|
|
* Gets a ColumnDef object for a single column.
|
|
*
|
|
* Throws an exception if the table is not found.
|
|
*
|
|
* @param string $table name of the table
|
|
* @param string $column name of the column
|
|
*
|
|
* @return ColumnDef definition of the column or null
|
|
* if not found.
|
|
*/
|
|
|
|
public function getColumnDef($table, $column)
|
|
{
|
|
$td = $this->getTableDef($table);
|
|
|
|
foreach ($td->columns as $cd) {
|
|
if ($cd->name == $column) {
|
|
return $cd;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Creates a table with the given names and columns.
|
|
*
|
|
* @param string $name Name of the table
|
|
* @param array $columns Array of ColumnDef objects
|
|
* for new table.
|
|
*
|
|
* @return boolean success flag
|
|
*/
|
|
|
|
public function createTable($name, $columns)
|
|
{
|
|
$statements = $this->buildCreateTable($tableName, $def);
|
|
return $this->runSqlSet($statements);
|
|
}
|
|
|
|
/**
|
|
* Build a set of SQL statements to create a table with the given
|
|
* name and columns.
|
|
*
|
|
* @param string $name Name of the table
|
|
* @param array $def Table definition array
|
|
*
|
|
* @return boolean success flag
|
|
*/
|
|
public function buildCreateTable($name, $def)
|
|
{
|
|
$sql = array();
|
|
|
|
foreach ($def['fields'] as $col => $colDef) {
|
|
$this->appendColumnDef($sql, $col, $colDef);
|
|
}
|
|
|
|
// Primary and unique keys are constraints, so go within
|
|
// the CREATE TABLE statement normally.
|
|
if (!empty($def['primary key'])) {
|
|
$this->appendPrimaryKeyDef($sql, $def['primary key']);
|
|
}
|
|
|
|
if (!empty($def['unique keys'])) {
|
|
foreach ($def['unique keys'] as $col => $colDef) {
|
|
$this->appendUniqueKeyDef($sql, $col, $colDef);
|
|
}
|
|
}
|
|
|
|
// Multi-value indexes are advisory and for best portability
|
|
// should be created as separate statements.
|
|
$statements = array();
|
|
$statements[] = $this->startCreateTable($name, $def) . "\n" .
|
|
implode($sql, ",\n") . "\n" .
|
|
$this->endCreateTable($name, $def);
|
|
if (!empty($def['indexes'])) {
|
|
foreach ($def['indexes'] as $col => $colDef) {
|
|
$this->appendCreateIndex($statements, $name, $col, $colDef);
|
|
}
|
|
}
|
|
|
|
return $statements;
|
|
}
|
|
|
|
/**
|
|
* Set up a 'create table' SQL statement.
|
|
*
|
|
* @param string $name table name
|
|
* @param array $def table definition
|
|
* @param $string
|
|
*/
|
|
function startCreateTable($name, array $def)
|
|
{
|
|
return 'CREATE TABLE ' . $this->quoteIdentifier($name) . ' (';
|
|
}
|
|
|
|
/**
|
|
* Close out a 'create table' SQL statement.
|
|
*
|
|
* @param string $name table name
|
|
* @param array $def table definition
|
|
* @return string
|
|
*/
|
|
function endCreateTable($name, array $def)
|
|
{
|
|
return ')';
|
|
}
|
|
|
|
/**
|
|
* Append an SQL fragment with a column definition in a CREATE TABLE statement.
|
|
*
|
|
* @param array $sql
|
|
* @param string $name
|
|
* @param array $def
|
|
*/
|
|
function appendColumnDef(array &$sql, $name, array $def)
|
|
{
|
|
$sql[] = "$name " . $this->columnSql($def);
|
|
}
|
|
|
|
/**
|
|
* Append an SQL fragment with a constraint definition for a primary
|
|
* key in a CREATE TABLE statement.
|
|
*
|
|
* @param array $sql
|
|
* @param array $def
|
|
*/
|
|
function appendPrimaryKeyDef(array &$sql, array $def)
|
|
{
|
|
$sql[] = "PRIMARY KEY " . $this->buildIndexList($def);
|
|
}
|
|
|
|
/**
|
|
* Append an SQL fragment with a constraint definition for a primary
|
|
* key in a CREATE TABLE statement.
|
|
*
|
|
* @param array $sql
|
|
* @param string $name
|
|
* @param array $def
|
|
*/
|
|
function appendUniqueKeyDef(array &$sql, $name, array $def)
|
|
{
|
|
$sql[] = "UNIQUE $name " . $this->buildIndexList($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 $def
|
|
*/
|
|
function appendCreateIndex(array &$statements, $table, $name, array $def)
|
|
{
|
|
$statements[] = "CREATE INDEX $name ON $table " . $this->buildIndexList($def);
|
|
}
|
|
|
|
function buildIndexList(array $def)
|
|
{
|
|
// @fixme
|
|
return '(' . implode(',', array_map(array($this, 'buildIndexItem'), $def)) . ')';
|
|
}
|
|
|
|
function buildIndexItem($def)
|
|
{
|
|
if (is_array($def)) {
|
|
list($name, $size) = $def;
|
|
return $this->quoteIdentifier($name) . '(' . intval($size) . ')';
|
|
}
|
|
return $this->quoteIdentifier($def);
|
|
}
|
|
|
|
/**
|
|
* Drops a table from the schema
|
|
*
|
|
* Throws an exception if the table is not found.
|
|
*
|
|
* @param string $name Name of the table to drop
|
|
*
|
|
* @return boolean success flag
|
|
*/
|
|
|
|
public function dropTable($name)
|
|
{
|
|
$res = $this->conn->query("DROP TABLE $name");
|
|
|
|
if (PEAR::isError($res)) {
|
|
throw new Exception($res->getMessage());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Adds an index to a table.
|
|
*
|
|
* If no name is provided, a name will be made up based
|
|
* on the table name and column names.
|
|
*
|
|
* Throws an exception on database error, esp. if the table
|
|
* does not exist.
|
|
*
|
|
* @param string $table Name of the table
|
|
* @param array $columnNames Name of columns to index
|
|
* @param string $name (Optional) name of the index
|
|
*
|
|
* @return boolean success flag
|
|
*/
|
|
|
|
public function createIndex($table, $columnNames, $name=null)
|
|
{
|
|
if (!is_array($columnNames)) {
|
|
$columnNames = array($columnNames);
|
|
}
|
|
|
|
if (empty($name)) {
|
|
$name = "{$table}_".implode("_", $columnNames)."_idx";
|
|
}
|
|
|
|
$res = $this->conn->query("ALTER TABLE $table ".
|
|
"ADD INDEX $name (".
|
|
implode(",", $columnNames).")");
|
|
|
|
if (PEAR::isError($res)) {
|
|
throw new Exception($res->getMessage());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Drops a named index from a table.
|
|
*
|
|
* @param string $table name of the table the index is on.
|
|
* @param string $name name of the index
|
|
*
|
|
* @return boolean success flag
|
|
*/
|
|
|
|
public function dropIndex($table, $name)
|
|
{
|
|
$res = $this->conn->query("ALTER TABLE $table DROP INDEX $name");
|
|
|
|
if (PEAR::isError($res)) {
|
|
throw new Exception($res->getMessage());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Adds a column to a table
|
|
*
|
|
* @param string $table name of the table
|
|
* @param ColumnDef $columndef Definition of the new
|
|
* column.
|
|
*
|
|
* @return boolean success flag
|
|
*/
|
|
|
|
public function addColumn($table, $columndef)
|
|
{
|
|
$sql = "ALTER TABLE $table ADD COLUMN " . $this->_columnSql($columndef);
|
|
|
|
$res = $this->conn->query($sql);
|
|
|
|
if (PEAR::isError($res)) {
|
|
throw new Exception($res->getMessage());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Modifies a column in the schema.
|
|
*
|
|
* The name must match an existing column and table.
|
|
*
|
|
* @param string $table name of the table
|
|
* @param ColumnDef $columndef new definition of the column.
|
|
*
|
|
* @return boolean success flag
|
|
*/
|
|
|
|
public function modifyColumn($table, $columndef)
|
|
{
|
|
$sql = "ALTER TABLE $table MODIFY COLUMN " .
|
|
$this->_columnSql($columndef);
|
|
|
|
$res = $this->conn->query($sql);
|
|
|
|
if (PEAR::isError($res)) {
|
|
throw new Exception($res->getMessage());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Drops a column from a table
|
|
*
|
|
* The name must match an existing column.
|
|
*
|
|
* @param string $table name of the table
|
|
* @param string $columnName name of the column to drop
|
|
*
|
|
* @return boolean success flag
|
|
*/
|
|
|
|
public function dropColumn($table, $columnName)
|
|
{
|
|
$sql = "ALTER TABLE $table DROP COLUMN $columnName";
|
|
|
|
$res = $this->conn->query($sql);
|
|
|
|
if (PEAR::isError($res)) {
|
|
throw new Exception($res->getMessage());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Ensures that a table exists with the given
|
|
* name and the given column definitions.
|
|
*
|
|
* If the table does not yet exist, it will
|
|
* create the table. If it does exist, it will
|
|
* alter the table to match the column definitions.
|
|
*
|
|
* @param string $tableName name of the table
|
|
* @param array $def Table definition array
|
|
*
|
|
* @return boolean success flag
|
|
*/
|
|
|
|
public function ensureTable($tableName, $def)
|
|
{
|
|
$statements = $this->buildEnsureTable($tableName, $def);
|
|
return $this->runSqlSet($statements);
|
|
}
|
|
|
|
/**
|
|
* Run a given set of SQL commands on the connection in sequence.
|
|
* Empty input is ok.
|
|
*
|
|
* @fixme if multiple statements, wrap in a transaction?
|
|
* @param array $statements
|
|
* @return boolean success flag
|
|
*/
|
|
function runSqlSet(array $statements)
|
|
{
|
|
$ok = true;
|
|
foreach ($statements as $sql) {
|
|
$res = $this->conn->query($sql);
|
|
|
|
if (PEAR::isError($res)) {
|
|
throw new Exception($res->getMessage());
|
|
}
|
|
}
|
|
return $ok;
|
|
}
|
|
|
|
/**
|
|
* Check a table's status, and if needed build a set
|
|
* of SQL statements which change it to be consistent
|
|
* with the given table definition.
|
|
*
|
|
* If the table does not yet exist, statements will
|
|
* be returned to create the table. If it does exist,
|
|
* statements will be returned to alter the table to
|
|
* match the column definitions.
|
|
*
|
|
* @param string $tableName name of the table
|
|
* @param array $columns array of ColumnDef
|
|
* objects for the table
|
|
*
|
|
* @return array of SQL statements
|
|
*/
|
|
|
|
function buildEnsureTable($tableName, $def)
|
|
{
|
|
try {
|
|
$old = $this->getTableDef($tableName);
|
|
} catch (Exception $e) {
|
|
// @fixme this is a terrible check :D
|
|
if (preg_match('/no such table/', $e->getMessage())) {
|
|
return $this->buildCreateTable($tableName, $def);
|
|
} else {
|
|
throw $e;
|
|
}
|
|
}
|
|
|
|
// @fixme check if not present
|
|
$fields = $this->diffArrays($old['fields'], $def['fields'], array($this, 'columnsEqual'));
|
|
$uniques = $this->diffArrays($old['unique keys'], $def['unique keys']);
|
|
$indexes = $this->diffArrays($old['indexes'], $def['indexes']);
|
|
|
|
/*
|
|
if (count($toadd) + count($todrop) + count($tomod) == 0) {
|
|
// nothing to do
|
|
return true;
|
|
}
|
|
*/
|
|
|
|
// For efficiency, we want this all in one
|
|
// query, instead of using our methods.
|
|
|
|
$phrase = array();
|
|
|
|
foreach ($uniques['del'] + $uniques['mod'] as $keyName) {
|
|
$this->appendAlterDropUnique($phrase, $keyName);
|
|
}
|
|
|
|
foreach ($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, $columnName);
|
|
}
|
|
|
|
foreach ($uniques['mod'] + $uniques['add'] as $keyName) {
|
|
$this->appendAlterAddUnique($phrase, $keyName, $def['unique keys'][$keyName]);
|
|
}
|
|
|
|
$sql = 'ALTER TABLE ' . $tableName . ' ' . implode(",\n", $phrase);
|
|
|
|
return array($sql);
|
|
}
|
|
|
|
function diffArrays($old, $new, $compareCallback=null)
|
|
{
|
|
|
|
$oldKeys = array_keys($old ? $old : array());
|
|
$newKeys = array_keys($new ? $new : array());
|
|
|
|
$toadd = array_diff($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);
|
|
}
|
|
|
|
/**
|
|
* 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);'ADD CONSTRAINT ' . $keyName;
|
|
}
|
|
|
|
function appendAlterDropUnique(array &$phrase, $keyName)
|
|
{
|
|
$phrase[] = 'DROP CONSTRAINT ' . $keyName;
|
|
}
|
|
|
|
/**
|
|
* 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($val)
|
|
{
|
|
if (is_int($val) || is_float($val) || is_double($val)) {
|
|
return strval($val);
|
|
} else {
|
|
return '"' . $this->conn->escapeSimple($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);
|
|
$lengths = array();
|
|
|
|
if ($column['type'] == 'numeric') {
|
|
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;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Map a native type back to an independent type + size
|
|
*
|
|
* @param string $type
|
|
* @return array ($type, $size) -- $size may be null
|
|
*/
|
|
protected function reverseMapType($type)
|
|
{
|
|
return array($type, null);
|
|
}
|
|
|
|
/**
|
|
* 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 $defs
|
|
* @return array
|
|
*/
|
|
function oldToNew($tableName, $defs)
|
|
{
|
|
$table = array();
|
|
$prefixes = array(
|
|
'tiny',
|
|
'small',
|
|
'medium',
|
|
'big',
|
|
);
|
|
foreach ($defs as $cd) {
|
|
$cd->addToTableDef($table);
|
|
$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->autoincrement) {
|
|
$column['type'] = 'serial';
|
|
}
|
|
if ($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 $table;
|
|
}
|
|
|
|
function isNumericType($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)
|
|
{
|
|
$res = $this->conn->query($sql);
|
|
if (PEAR::isError($res)) {
|
|
throw new Exception($res->getMessage());
|
|
}
|
|
|
|
$out = array();
|
|
$row = array();
|
|
while ($res->fetchInto($row, DB_FETCHMODE_ASSOC)) {
|
|
$out[] = $row;
|
|
}
|
|
$res->free();
|
|
|
|
return $out;
|
|
}
|
|
|
|
}
|
|
|
|
class SchemaTableMissingException extends Exception
|
|
{
|
|
// no-op
|
|
}
|
|
|