mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
1049 lines
32 KiB
PHP
1049 lines
32 KiB
PHP
<?php
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namespace SilverStripe\ORM\Connect;
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use Exception;
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use Config;
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use Object;
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use Director;
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use SilverStripe\ORM\FieldType\DBPrimaryKey;
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/**
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* Represents and handles all schema management for a database
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*
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* @package framework
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* @subpackage orm
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*/
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abstract class DBSchemaManager {
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/**
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*
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* @config
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* Check tables when running /dev/build, and repair them if necessary.
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* In case of large databases or more fine-grained control on how to handle
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* data corruption in tables, you can disable this behaviour and handle it
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* outside of this class, e.g. through a nightly system task with extended logging capabilities.
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*
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* @var boolean
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*/
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private static $check_and_repair_on_build = true;
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/**
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* Instance of the database controller this schema belongs to
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*
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* @var SS_Database
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*/
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protected $database = null;
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/**
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* If this is false, then information about database operations
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* will be displayed, eg creation of tables.
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*
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* @var boolean
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*/
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protected $supressOutput = false;
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/**
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* Injector injection point for database controller
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*
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* @param SS_Database $connector
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*/
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public function setDatabase(SS_Database $database) {
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$this->database = $database;
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}
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/**
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* The table list, generated by the tableList() function.
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* Used by the requireTable() function.
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*
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* @var array
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*/
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protected $tableList;
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/**
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* Keeps track whether we are currently updating the schema.
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*
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* @var boolean
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*/
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protected $schemaIsUpdating = false;
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/**
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* Large array structure that represents a schema update transaction
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*
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* @var array
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*/
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protected $schemaUpdateTransaction;
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/**
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* Enable supression of database messages.
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*/
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public function quiet() {
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$this->supressOutput = true;
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}
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/**
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* Execute the given SQL query.
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* This abstract function must be defined by subclasses as part of the actual implementation.
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* It should return a subclass of SS_Query as the result.
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*
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* @param string $sql The SQL query to execute
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* @param int $errorLevel The level of error reporting to enable for the query
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* @return SS_Query
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*/
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public function query($sql, $errorLevel = E_USER_ERROR) {
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return $this->database->query($sql, $errorLevel);
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}
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/**
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* Execute the given SQL parameterised query with the specified arguments
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*
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* @param string $sql The SQL query to execute. The ? character will denote parameters.
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* @param array $parameters An ordered list of arguments.
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* @param int $errorLevel The level of error reporting to enable for the query
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* @return SS_Query
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*/
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public function preparedQuery($sql, $parameters, $errorLevel = E_USER_ERROR) {
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return $this->database->preparedQuery($sql, $parameters, $errorLevel);
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}
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/**
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* Initiates a schema update within a single callback
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*
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* @var callable $callback
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* @throws Exception
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*/
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public function schemaUpdate($callback) {
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// Begin schema update
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$this->schemaIsUpdating = true;
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// Update table list
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$this->tableList = array();
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$tables = $this->tableList();
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foreach ($tables as $table) {
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$this->tableList[strtolower($table)] = $table;
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}
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// Clear update list for client code to mess around with
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$this->schemaUpdateTransaction = array();
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$error = null;
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try {
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// Yield control to client code
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$callback();
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// If the client code has cancelled the update then abort
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if(!$this->isSchemaUpdating()) return;
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// End schema update
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foreach ($this->schemaUpdateTransaction as $tableName => $changes) {
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$advancedOptions = isset($changes['advancedOptions']) ? $changes['advancedOptions'] : null;
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switch ($changes['command']) {
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case 'create':
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$this->createTable($tableName, $changes['newFields'], $changes['newIndexes'],
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$changes['options'], $advancedOptions);
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break;
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case 'alter':
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$this->alterTable($tableName, $changes['newFields'], $changes['newIndexes'],
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$changes['alteredFields'], $changes['alteredIndexes'],
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$changes['alteredOptions'], $advancedOptions);
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break;
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}
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}
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} catch(Exception $ex) {
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$error = $ex;
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}
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// finally {
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$this->schemaUpdateTransaction = null;
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$this->schemaIsUpdating = false;
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// }
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if($error) throw $error;
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}
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/**
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* Cancels the schema updates requested during (but not after) schemaUpdate() call.
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*/
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public function cancelSchemaUpdate() {
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$this->schemaUpdateTransaction = null;
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$this->schemaIsUpdating = false;
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}
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/**
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* Returns true if we are during a schema update.
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*
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* @return boolean
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*/
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function isSchemaUpdating() {
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return $this->schemaIsUpdating;
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}
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/**
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* Returns true if schema modifications were requested during (but not after) schemaUpdate() call.
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*
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* @return boolean
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*/
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public function doesSchemaNeedUpdating() {
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return (bool) $this->schemaUpdateTransaction;
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}
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// Transactional schema altering functions - they don't do anything except for update schemaUpdateTransaction
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/**
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* Instruct the schema manager to record a table creation to later execute
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*
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* @param string $table Name of the table
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* @param array $options Create table options (ENGINE, etc.)
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* @param array $advanced_options Advanced table creation options
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*/
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public function transCreateTable($table, $options = null, $advanced_options = null) {
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$this->schemaUpdateTransaction[$table] = array(
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'command' => 'create',
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'newFields' => array(),
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'newIndexes' => array(),
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'options' => $options,
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'advancedOptions' => $advanced_options
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);
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}
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/**
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* Instruct the schema manager to record a table alteration to later execute
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*
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* @param string $table Name of the table
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* @param array $options Create table options (ENGINE, etc.)
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* @param array $advanced_options Advanced table creation options
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*/
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public function transAlterTable($table, $options, $advanced_options) {
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$this->transInitTable($table);
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$this->schemaUpdateTransaction[$table]['alteredOptions'] = $options;
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$this->schemaUpdateTransaction[$table]['advancedOptions'] = $advanced_options;
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}
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/**
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* Instruct the schema manager to record a field to be later created
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*
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* @param string $table Name of the table to hold this field
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* @param string $field Name of the field to create
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* @param string $schema Field specification as a string
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*/
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public function transCreateField($table, $field, $schema) {
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$this->transInitTable($table);
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$this->schemaUpdateTransaction[$table]['newFields'][$field] = $schema;
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}
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/**
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* Instruct the schema manager to record an index to be later created
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*
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* @param string $table Name of the table to hold this index
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* @param string $index Name of the index to create
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* @param array $schema Already parsed index specification
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*/
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public function transCreateIndex($table, $index, $schema) {
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$this->transInitTable($table);
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$this->schemaUpdateTransaction[$table]['newIndexes'][$index] = $schema;
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}
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/**
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* Instruct the schema manager to record a field to be later updated
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*
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* @param string $table Name of the table to hold this field
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* @param string $field Name of the field to update
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* @param string $schema Field specification as a string
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*/
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public function transAlterField($table, $field, $schema) {
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$this->transInitTable($table);
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$this->schemaUpdateTransaction[$table]['alteredFields'][$field] = $schema;
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}
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/**
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* Instruct the schema manager to record an index to be later updated
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*
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* @param string $table Name of the table to hold this index
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* @param string $index Name of the index to update
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* @param array $schema Already parsed index specification
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*/
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public function transAlterIndex($table, $index, $schema) {
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$this->transInitTable($table);
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$this->schemaUpdateTransaction[$table]['alteredIndexes'][$index] = $schema;
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}
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/**
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* Handler for the other transXXX methods - mark the given table as being altered
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* if it doesn't already exist
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*
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* @param string $table Name of the table to initialise
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*/
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protected function transInitTable($table) {
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if (!isset($this->schemaUpdateTransaction[$table])) {
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$this->schemaUpdateTransaction[$table] = array(
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'command' => 'alter',
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'newFields' => array(),
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'newIndexes' => array(),
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'alteredFields' => array(),
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'alteredIndexes' => array(),
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'alteredOptions' => ''
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);
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}
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}
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/**
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* Generate the following table in the database, modifying whatever already exists
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* as necessary.
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*
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* @todo Change detection for CREATE TABLE $options other than "Engine"
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*
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* @param string $table The name of the table
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* @param array $fieldSchema A list of the fields to create, in the same form as DataObject::$db
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* @param array $indexSchema A list of indexes to create. See {@link requireIndex()}
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* The values of the array can be one of:
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* - true: Create a single column index on the field named the same as the index.
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* - array('fields' => array('A','B','C'), 'type' => 'index/unique/fulltext'): This gives you full
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* control over the index.
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* @param boolean $hasAutoIncPK A flag indicating that the primary key on this table is an autoincrement type
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* @param string $options SQL statement to append to the CREATE TABLE call.
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* @param array $extensions List of extensions
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*/
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public function requireTable($table, $fieldSchema = null, $indexSchema = null, $hasAutoIncPK = true,
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$options = array(), $extensions = false
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) {
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if (!isset($this->tableList[strtolower($table)])) {
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$this->transCreateTable($table, $options, $extensions);
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$this->alterationMessage("Table $table: created", "created");
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} else {
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if (Config::inst()->get('SilverStripe\ORM\Connect\DBSchemaManager', 'check_and_repair_on_build')) {
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$this->checkAndRepairTable($table, $options);
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}
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// Check if options changed
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$tableOptionsChanged = false;
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// Check for DB constant on the schema class
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$dbIDName = sprintf('%s::ID', get_class($this));
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$dbID = defined($dbIDName) ? constant($dbIDName) : null;
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if ($dbID && isset($options[$dbID])) {
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if (preg_match('/ENGINE=([^\s]*)/', $options[$dbID], $alteredEngineMatches)) {
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$alteredEngine = $alteredEngineMatches[1];
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$tableStatus = $this->query(sprintf('SHOW TABLE STATUS LIKE \'%s\'', $table))->first();
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$tableOptionsChanged = ($tableStatus['Engine'] != $alteredEngine);
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}
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}
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if ($tableOptionsChanged || ($extensions && $this->database->supportsExtensions($extensions))) {
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$this->transAlterTable($table, $options, $extensions);
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}
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}
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//DB ABSTRACTION: we need to convert this to a db-specific version:
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if(!isset($fieldSchema['ID'])) {
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$this->requireField($table, 'ID', $this->IdColumn(false, $hasAutoIncPK));
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}
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// Create custom fields
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if ($fieldSchema) {
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foreach ($fieldSchema as $fieldName => $fieldSpec) {
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//Is this an array field?
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$arrayValue = '';
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if (strpos($fieldSpec, '[') !== false) {
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//If so, remove it and store that info separately
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$pos = strpos($fieldSpec, '[');
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$arrayValue = substr($fieldSpec, $pos);
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$fieldSpec = substr($fieldSpec, 0, $pos);
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}
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$fieldObj = Object::create_from_string($fieldSpec, $fieldName);
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$fieldObj->arrayValue = $arrayValue;
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$fieldObj->setTable($table);
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if($fieldObj instanceof DBPrimaryKey) {
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$fieldObj->setAutoIncrement($hasAutoIncPK);
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}
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$fieldObj->requireField();
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}
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}
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// Create custom indexes
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if ($indexSchema) {
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foreach ($indexSchema as $indexName => $indexDetails) {
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$this->requireIndex($table, $indexName, $indexDetails);
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}
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}
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}
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/**
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* If the given table exists, move it out of the way by renaming it to _obsolete_(tablename).
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* @param string $table The table name.
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*/
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public function dontRequireTable($table) {
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if (isset($this->tableList[strtolower($table)])) {
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$suffix = '';
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while (isset($this->tableList[strtolower("_obsolete_{$table}$suffix")])) {
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$suffix = $suffix
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? ($suffix + 1)
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: 2;
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}
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$this->renameTable($table, "_obsolete_{$table}$suffix");
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$this->alterationMessage("Table $table: renamed to _obsolete_{$table}$suffix", "obsolete");
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}
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}
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/**
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* Generate the given index in the database, modifying whatever already exists as necessary.
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*
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* The keys of the array are the names of the index.
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* The values of the array can be one of:
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* - true: Create a single column index on the field named the same as the index.
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* - array('type' => 'index|unique|fulltext', 'value' => 'FieldA, FieldB'): This gives you full
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* control over the index.
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*
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* @param string $table The table name.
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* @param string $index The index name.
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* @param string|array|boolean $spec The specification of the index in any
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* loose format. See requireTable() for more information.
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*/
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public function requireIndex($table, $index, $spec) {
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// Detect if adding to a new table
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$newTable = !isset($this->tableList[strtolower($table)]);
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// Force spec into standard array format
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$spec = $this->parseIndexSpec($index, $spec);
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$specString = $this->convertIndexSpec($spec);
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// Check existing index
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if (!$newTable) {
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$indexKey = $this->indexKey($table, $index, $spec);
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$indexList = $this->indexList($table);
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if (isset($indexList[$indexKey])) {
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// $oldSpec should be in standard array format
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$oldSpec = $indexList[$indexKey];
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$oldSpecString = $this->convertIndexSpec($oldSpec);
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}
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}
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// Initiate either generation or modification of index
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if ($newTable || !isset($indexList[$indexKey])) {
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// New index
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$this->transCreateIndex($table, $index, $spec);
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$this->alterationMessage("Index $table.$index: created as $specString", "created");
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} else if ($oldSpecString != $specString) {
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// Updated index
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$this->transAlterIndex($table, $index, $spec);
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$this->alterationMessage(
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"Index $table.$index: changed to $specString <i style=\"color: #AAA\">(from $oldSpecString)</i>",
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"changed"
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);
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}
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}
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/**
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* Splits a spec string safely, considering quoted columns, whitespace,
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* and cleaning brackets
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*
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* @param string $spec The input index specification string
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* @return array List of columns in the spec
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*/
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protected function explodeColumnString($spec) {
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// Remove any leading/trailing brackets and outlying modifiers
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// E.g. 'unique (Title, "QuotedColumn");' => 'Title, "QuotedColumn"'
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$containedSpec = preg_replace('/(.*\(\s*)|(\s*\).*)/', '', $spec);
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// Split potentially quoted modifiers
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// E.g. 'Title, "QuotedColumn"' => array('Title', 'QuotedColumn')
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return preg_split('/"?\s*,\s*"?/', trim($containedSpec, '(") '));
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}
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/**
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* Builds a properly quoted column list from an array
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*
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* @param array $columns List of columns to implode
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* @return string A properly quoted list of column names
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*/
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protected function implodeColumnList($columns) {
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if(empty($columns)) return '';
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return '"' . implode('","', $columns) . '"';
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}
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/**
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* Given an index specification in the form of a string ensure that each
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* column name is property quoted, stripping brackets and modifiers.
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* This index may also be in the form of a "CREATE INDEX..." sql fragment
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*
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* @param string $spec The input specification or query. E.g. 'unique (Column1, Column2)'
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* @return string The properly quoted column list. E.g. '"Column1", "Column2"'
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*/
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protected function quoteColumnSpecString($spec) {
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$bits = $this->explodeColumnString($spec);
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return $this->implodeColumnList($bits);
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}
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/**
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* Given an index spec determines the index type
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*
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* @param array|string $spec
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* @return string
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*/
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protected function determineIndexType($spec) {
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// check array spec
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if(is_array($spec) && isset($spec['type'])) {
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return $spec['type'];
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} elseif (!is_array($spec) && preg_match('/(?<type>\w+)\s*\(/', $spec, $matchType)) {
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return strtolower($matchType['type']);
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} else {
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return 'index';
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}
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}
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/**
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* Converts an array or string index spec into a universally useful array
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*
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* @see convertIndexSpec() for approximate inverse
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* @param string|array $spec
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* @return array The resulting spec array with the required fields name, type, and value
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*/
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protected function parseIndexSpec($name, $spec) {
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// Support $indexes = array('ColumnName' => true) for quick indexes
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if ($spec === true) {
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return array(
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'name' => $name,
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'value' => $this->quoteColumnSpecString($name),
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'type' => 'index'
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);
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}
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// Do minimal cleanup on any already parsed spec
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if(is_array($spec)) {
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$spec['value'] = $this->quoteColumnSpecString($spec['value']);
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$spec['type'] = empty($spec['type']) ? 'index' : trim($spec['type']);
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return $spec;
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}
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// Nicely formatted spec!
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return array(
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'name' => $name,
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'value' => $this->quoteColumnSpecString($spec),
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'type' => $this->determineIndexType($spec)
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);
|
|
}
|
|
|
|
/**
|
|
* This takes the index spec which has been provided by a class (ie static $indexes = blah blah)
|
|
* and turns it into a proper string.
|
|
* Some indexes may be arrays, such as fulltext and unique indexes, and this allows database-specific
|
|
* arrays to be created. See {@link requireTable()} for details on the index format.
|
|
*
|
|
* @see http://dev.mysql.com/doc/refman/5.0/en/create-index.html
|
|
* @see parseIndexSpec() for approximate inverse
|
|
*
|
|
* @param string|array $indexSpec
|
|
*/
|
|
protected function convertIndexSpec($indexSpec) {
|
|
// Return already converted spec
|
|
if (!is_array($indexSpec)) return $indexSpec;
|
|
|
|
// Combine elements into standard string format
|
|
return "{$indexSpec['type']} ({$indexSpec['value']})";
|
|
}
|
|
|
|
/**
|
|
* Returns true if the given table is exists in the current database
|
|
*
|
|
* @param string $table Name of table to check
|
|
* @return boolean Flag indicating existence of table
|
|
*/
|
|
abstract public function hasTable($tableName);
|
|
|
|
/**
|
|
* Return true if the table exists and already has a the field specified
|
|
*
|
|
* @param string $tableName - The table to check
|
|
* @param string $fieldName - The field to check
|
|
* @return bool - True if the table exists and the field exists on the table
|
|
*/
|
|
public function hasField($tableName, $fieldName) {
|
|
if (!$this->hasTable($tableName)) return false;
|
|
$fields = $this->fieldList($tableName);
|
|
return array_key_exists($fieldName, $fields);
|
|
}
|
|
|
|
/**
|
|
* Generate the given field on the table, modifying whatever already exists as necessary.
|
|
*
|
|
* @param string $table The table name.
|
|
* @param string $field The field name.
|
|
* @param array|string $spec The field specification. If passed in array syntax, the specific database
|
|
* driver takes care of the ALTER TABLE syntax. If passed as a string, its assumed to
|
|
* be prepared as a direct SQL framgment ready for insertion into ALTER TABLE. In this case you'll
|
|
* need to take care of database abstraction in your DBField subclass.
|
|
*/
|
|
public function requireField($table, $field, $spec) {
|
|
//TODO: this is starting to get extremely fragmented.
|
|
//There are two different versions of $spec floating around, and their content changes depending
|
|
//on how they are structured. This needs to be tidied up.
|
|
$fieldValue = null;
|
|
$newTable = false;
|
|
|
|
// backwards compatibility patch for pre 2.4 requireField() calls
|
|
$spec_orig = $spec;
|
|
|
|
if (!is_string($spec)) {
|
|
$spec['parts']['name'] = $field;
|
|
$spec_orig['parts']['name'] = $field;
|
|
//Convert the $spec array into a database-specific string
|
|
$spec = $this->{$spec['type']}($spec['parts'], true);
|
|
}
|
|
|
|
// Collations didn't come in until MySQL 4.1. Anything earlier will throw a syntax error if you try and use
|
|
// collations.
|
|
// TODO: move this to the MySQLDatabase file, or drop it altogether?
|
|
if (!$this->database->supportsCollations()) {
|
|
$spec = preg_replace('/ *character set [^ ]+( collate [^ ]+)?( |$)/', '\\2', $spec);
|
|
}
|
|
|
|
if (!isset($this->tableList[strtolower($table)])) $newTable = true;
|
|
|
|
if (is_array($spec)) {
|
|
$specValue = $this->$spec_orig['type']($spec_orig['parts']);
|
|
} else {
|
|
$specValue = $spec;
|
|
}
|
|
|
|
// We need to get db-specific versions of the ID column:
|
|
if ($spec_orig == $this->IdColumn() || $spec_orig == $this->IdColumn(true)) {
|
|
$specValue = $this->IdColumn(true);
|
|
}
|
|
|
|
if (!$newTable) {
|
|
$fieldList = $this->fieldList($table);
|
|
if (isset($fieldList[$field])) {
|
|
if (is_array($fieldList[$field])) {
|
|
$fieldValue = $fieldList[$field]['data_type'];
|
|
} else {
|
|
$fieldValue = $fieldList[$field];
|
|
}
|
|
}
|
|
}
|
|
|
|
// Get the version of the field as we would create it. This is used for comparison purposes to see if the
|
|
// existing field is different to what we now want
|
|
if (is_array($spec_orig)) {
|
|
$spec_orig = $this->{$spec_orig['type']}($spec_orig['parts']);
|
|
}
|
|
|
|
if ($newTable || $fieldValue == '') {
|
|
$this->transCreateField($table, $field, $spec_orig);
|
|
$this->alterationMessage("Field $table.$field: created as $spec_orig", "created");
|
|
} else if ($fieldValue != $specValue) {
|
|
// If enums/sets are being modified, then we need to fix existing data in the table.
|
|
// Update any records where the enum is set to a legacy value to be set to the default.
|
|
foreach (array('enum', 'set') as $enumtype) {
|
|
if (preg_match("/^$enumtype/i", $specValue)) {
|
|
$newStr = preg_replace("/(^$enumtype\s*\(')|('$\).*)/i", "", $spec_orig);
|
|
$new = preg_split("/'\s*,\s*'/", $newStr);
|
|
|
|
$oldStr = preg_replace("/(^$enumtype\s*\(')|('$\).*)/i", "", $fieldValue);
|
|
$old = preg_split("/'\s*,\s*'/", $newStr);
|
|
|
|
$holder = array();
|
|
foreach ($old as $check) {
|
|
if (!in_array($check, $new)) {
|
|
$holder[] = $check;
|
|
}
|
|
}
|
|
if (count($holder)) {
|
|
$default = explode('default ', $spec_orig);
|
|
$default = $default[1];
|
|
$query = "UPDATE \"$table\" SET $field=$default WHERE $field IN (";
|
|
for ($i = 0; $i + 1 < count($holder); $i++) {
|
|
$query .= "'{$holder[$i]}', ";
|
|
}
|
|
$query .= "'{$holder[$i]}')";
|
|
$this->query($query);
|
|
$amount = $this->database->affectedRows();
|
|
$this->alterationMessage("Changed $amount rows to default value of field $field"
|
|
. " (Value: $default)");
|
|
}
|
|
}
|
|
}
|
|
$this->transAlterField($table, $field, $spec_orig);
|
|
$this->alterationMessage(
|
|
"Field $table.$field: changed to $specValue <i style=\"color: #AAA\">(from {$fieldValue})</i>",
|
|
"changed"
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* If the given field exists, move it out of the way by renaming it to _obsolete_(fieldname).
|
|
*
|
|
* @param string $table
|
|
* @param string $fieldName
|
|
*/
|
|
public function dontRequireField($table, $fieldName) {
|
|
$fieldList = $this->fieldList($table);
|
|
if (array_key_exists($fieldName, $fieldList)) {
|
|
$suffix = '';
|
|
while (isset($fieldList[strtolower("_obsolete_{$fieldName}$suffix")])) {
|
|
$suffix = $suffix
|
|
? ($suffix + 1)
|
|
: 2;
|
|
}
|
|
$this->renameField($table, $fieldName, "_obsolete_{$fieldName}$suffix");
|
|
$this->alterationMessage(
|
|
"Field $table.$fieldName: renamed to $table._obsolete_{$fieldName}$suffix",
|
|
"obsolete"
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Show a message about database alteration
|
|
*
|
|
* @param string $message to display
|
|
* @param string $type one of [created|changed|repaired|obsolete|deleted|error]
|
|
*/
|
|
public function alterationMessage($message, $type = "") {
|
|
if (!$this->supressOutput) {
|
|
if (Director::is_cli()) {
|
|
switch ($type) {
|
|
case "created":
|
|
case "changed":
|
|
case "repaired":
|
|
$sign = "+";
|
|
break;
|
|
case "obsolete":
|
|
case "deleted":
|
|
$sign = '-';
|
|
break;
|
|
case "notice":
|
|
$sign = '*';
|
|
break;
|
|
case "error":
|
|
$sign = "!";
|
|
break;
|
|
default:
|
|
$sign = " ";
|
|
}
|
|
$message = strip_tags($message);
|
|
echo " $sign $message\n";
|
|
} else {
|
|
switch ($type) {
|
|
case "created":
|
|
$color = "green";
|
|
break;
|
|
case "obsolete":
|
|
$color = "red";
|
|
break;
|
|
case "notice":
|
|
$color = "orange";
|
|
break;
|
|
case "error":
|
|
$color = "red";
|
|
break;
|
|
case "deleted":
|
|
$color = "red";
|
|
break;
|
|
case "changed":
|
|
$color = "blue";
|
|
break;
|
|
case "repaired":
|
|
$color = "blue";
|
|
break;
|
|
default:
|
|
$color = "";
|
|
}
|
|
echo "<li style=\"color: $color\">$message</li>";
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This returns the data type for the id column which is the primary key for each table
|
|
*
|
|
* @param boolean $asDbValue
|
|
* @param boolean $hasAutoIncPK
|
|
* @return string
|
|
*/
|
|
abstract public function IdColumn($asDbValue = false, $hasAutoIncPK = true);
|
|
|
|
/**
|
|
* Checks a table's integrity and repairs it if necessary.
|
|
*
|
|
* @param string $tableName The name of the table.
|
|
* @return boolean Return true if the table has integrity after the method is complete.
|
|
*/
|
|
abstract public function checkAndRepairTable($tableName);
|
|
|
|
/**
|
|
* Returns the values of the given enum field
|
|
*
|
|
* @param string $tableName Name of table to check
|
|
* @param string $fieldName name of enum field to check
|
|
* @return array List of enum values
|
|
*/
|
|
abstract public function enumValuesForField($tableName, $fieldName);
|
|
|
|
|
|
/*
|
|
* This is a lookup table for data types.
|
|
* For instance, Postgres uses 'INT', while MySQL uses 'UNSIGNED'
|
|
* So this is a DB-specific list of equivilents.
|
|
*
|
|
* @param string $type
|
|
* @return string
|
|
*/
|
|
abstract public function dbDataType($type);
|
|
|
|
/**
|
|
* Retrieves the list of all databases the user has access to
|
|
*
|
|
* @return array List of database names
|
|
*/
|
|
abstract public function databaseList();
|
|
|
|
/**
|
|
* Determine if the database with the specified name exists
|
|
*
|
|
* @param string $name Name of the database to check for
|
|
* @return boolean Flag indicating whether this database exists
|
|
*/
|
|
abstract public function databaseExists($name);
|
|
|
|
/**
|
|
* Create a database with the specified name
|
|
*
|
|
* @param string $name Name of the database to create
|
|
* @return boolean True if successful
|
|
*/
|
|
abstract public function createDatabase($name);
|
|
|
|
/**
|
|
* Drops a database with the specified name
|
|
*
|
|
* @param string $name Name of the database to drop
|
|
*/
|
|
abstract public function dropDatabase($name);
|
|
|
|
/**
|
|
* Alter an index on a table.
|
|
*
|
|
* @param string $tableName The name of the table.
|
|
* @param string $indexName The name of the index.
|
|
* @param string $indexSpec The specification of the index, see {@link SS_Database::requireIndex()}
|
|
* for more details.
|
|
* @todo Find out where this is called from - Is it even used? Aren't indexes always dropped and re-added?
|
|
*/
|
|
abstract public function alterIndex($tableName, $indexName, $indexSpec);
|
|
|
|
/**
|
|
* Determines the key that should be used to identify this index
|
|
* when retrieved from DBSchemaManager->indexList.
|
|
* In some connectors this is the database-visible name, in others the
|
|
* usercode-visible name.
|
|
*
|
|
* @param string $table
|
|
* @param string $index
|
|
* @param array $spec
|
|
* @return string Key for this index
|
|
*/
|
|
abstract protected function indexKey($table, $index, $spec);
|
|
|
|
/**
|
|
* Return the list of indexes in a table.
|
|
*
|
|
* @param string $table The table name.
|
|
* @return array[array] List of current indexes in the table, each in standard
|
|
* array form. The key for this array should be predictable using the indexKey
|
|
* method
|
|
*/
|
|
abstract public function indexList($table);
|
|
|
|
/**
|
|
* Returns a list of all tables in the database.
|
|
* Keys are table names in lower case, values are table names in case that
|
|
* database expects.
|
|
*
|
|
* @return array
|
|
*/
|
|
abstract public function tableList();
|
|
|
|
/**
|
|
* Create a new table.
|
|
*
|
|
* @param string $table The name of the table
|
|
* @param array $fields A map of field names to field types
|
|
* @param array $indexes A map of indexes
|
|
* @param array $options An map of additional options. The available keys are as follows:
|
|
* - 'MSSQLDatabase'/'MySQLDatabase'/'PostgreSQLDatabase' - database-specific options such as "engine" for MySQL.
|
|
* - 'temporary' - If true, then a temporary table will be created
|
|
* @param $advancedOptions Advanced creation options
|
|
* @return string The table name generated. This may be different from the table name, for example with temporary
|
|
* tables.
|
|
*/
|
|
abstract public function createTable($table, $fields = null, $indexes = null, $options = null,
|
|
$advancedOptions = null);
|
|
|
|
/**
|
|
* Alter a table's schema.
|
|
*
|
|
* @param string $table The name of the table to alter
|
|
* @param array $newFields New fields, a map of field name => field schema
|
|
* @param array $newIndexes New indexes, a map of index name => index type
|
|
* @param array $alteredFields Updated fields, a map of field name => field schema
|
|
* @param array $alteredIndexes Updated indexes, a map of index name => index type
|
|
* @param array $alteredOptions
|
|
* @param array $advancedOptions
|
|
*/
|
|
abstract public function alterTable($table, $newFields = null, $newIndexes = null, $alteredFields = null,
|
|
$alteredIndexes = null, $alteredOptions = null, $advancedOptions = null);
|
|
|
|
/**
|
|
* Rename a table.
|
|
*
|
|
* @param string $oldTableName The old table name.
|
|
* @param string $newTableName The new table name.
|
|
*/
|
|
abstract public function renameTable($oldTableName, $newTableName);
|
|
|
|
/**
|
|
* Create a new field on a table.
|
|
*
|
|
* @param string $table Name of the table.
|
|
* @param string $field Name of the field to add.
|
|
* @param string $spec The field specification, eg 'INTEGER NOT NULL'
|
|
*/
|
|
abstract public function createField($table, $field, $spec);
|
|
|
|
/**
|
|
* Change the database column name of the given field.
|
|
*
|
|
* @param string $tableName The name of the tbale the field is in.
|
|
* @param string $oldName The name of the field to change.
|
|
* @param string $newName The new name of the field
|
|
*/
|
|
abstract public function renameField($tableName, $oldName, $newName);
|
|
|
|
/**
|
|
* Get a list of all the fields for the given table.
|
|
* Returns a map of field name => field spec.
|
|
*
|
|
* @param string $table The table name.
|
|
* @return array
|
|
*/
|
|
abstract public function fieldList($table);
|
|
|
|
/**
|
|
*
|
|
* This allows the cached values for a table's field list to be erased.
|
|
* If $tablename is empty, then the whole cache is erased.
|
|
*
|
|
* @param string $tableName
|
|
*
|
|
* @return boolean
|
|
*/
|
|
public function clearCachedFieldlist($tableName = false) {
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns data type for 'boolean' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function boolean($values);
|
|
|
|
/**
|
|
* Returns data type for 'date' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function date($values);
|
|
|
|
/**
|
|
* Returns data type for 'decimal' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function decimal($values);
|
|
|
|
/**
|
|
* Returns data type for 'set' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function enum($values);
|
|
|
|
/**
|
|
* Returns data type for 'set' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function set($values);
|
|
|
|
/**
|
|
* Returns data type for 'float' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function float($values);
|
|
|
|
/**
|
|
* Returns data type for 'int' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function int($values);
|
|
|
|
/**
|
|
* Returns data type for 'datetime' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function datetime($values);
|
|
|
|
/**
|
|
* Returns data type for 'text' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function text($values);
|
|
|
|
/**
|
|
* Returns data type for 'time' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function time($values);
|
|
|
|
/**
|
|
* Returns data type for 'varchar' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function varchar($values);
|
|
|
|
/*
|
|
* Returns data type for 'year' column
|
|
*
|
|
* @param array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
abstract public function year($values);
|
|
|
|
}
|