mirror of
https://github.com/yiisoft/yii2.git
synced 2025-11-04 06:37:55 +08:00
286 lines
9.8 KiB
PHP
286 lines
9.8 KiB
PHP
<?php
|
|
/**
|
|
* @link http://www.yiiframework.com/
|
|
* @copyright Copyright (c) 2008 Yii Software LLC
|
|
* @license http://www.yiiframework.com/license/
|
|
*/
|
|
|
|
namespace yii\db\sqlite;
|
|
|
|
use yii\base\NotSupportedException;
|
|
use yii\db\Expression;
|
|
use yii\db\TableSchema;
|
|
use yii\db\ColumnSchema;
|
|
use yii\db\Transaction;
|
|
|
|
/**
|
|
* Schema is the class for retrieving metadata from a SQLite (2/3) database.
|
|
*
|
|
* @property string $transactionIsolationLevel The transaction isolation level to use for this transaction.
|
|
* This can be either [[Transaction::READ_UNCOMMITTED]] or [[Transaction::SERIALIZABLE]].
|
|
*
|
|
* @author Qiang Xue <qiang.xue@gmail.com>
|
|
* @since 2.0
|
|
*/
|
|
class Schema extends \yii\db\Schema
|
|
{
|
|
/**
|
|
* @var array mapping from physical column types (keys) to abstract column types (values)
|
|
*/
|
|
public $typeMap = [
|
|
'tinyint' => self::TYPE_SMALLINT,
|
|
'bit' => self::TYPE_SMALLINT,
|
|
'boolean' => self::TYPE_BOOLEAN,
|
|
'bool' => self::TYPE_BOOLEAN,
|
|
'smallint' => self::TYPE_SMALLINT,
|
|
'mediumint' => self::TYPE_INTEGER,
|
|
'int' => self::TYPE_INTEGER,
|
|
'integer' => self::TYPE_INTEGER,
|
|
'bigint' => self::TYPE_BIGINT,
|
|
'float' => self::TYPE_FLOAT,
|
|
'double' => self::TYPE_FLOAT,
|
|
'real' => self::TYPE_FLOAT,
|
|
'decimal' => self::TYPE_DECIMAL,
|
|
'numeric' => self::TYPE_DECIMAL,
|
|
'tinytext' => self::TYPE_TEXT,
|
|
'mediumtext' => self::TYPE_TEXT,
|
|
'longtext' => self::TYPE_TEXT,
|
|
'text' => self::TYPE_TEXT,
|
|
'varchar' => self::TYPE_STRING,
|
|
'string' => self::TYPE_STRING,
|
|
'char' => self::TYPE_STRING,
|
|
'blob' => self::TYPE_BINARY,
|
|
'datetime' => self::TYPE_DATETIME,
|
|
'year' => self::TYPE_DATE,
|
|
'date' => self::TYPE_DATE,
|
|
'time' => self::TYPE_TIME,
|
|
'timestamp' => self::TYPE_TIMESTAMP,
|
|
'enum' => self::TYPE_STRING,
|
|
];
|
|
|
|
|
|
/**
|
|
* Quotes a table name for use in a query.
|
|
* A simple table name has no schema prefix.
|
|
* @param string $name table name
|
|
* @return string the properly quoted table name
|
|
*/
|
|
public function quoteSimpleTableName($name)
|
|
{
|
|
return strpos($name, "`") !== false ? $name : "`" . $name . "`";
|
|
}
|
|
|
|
/**
|
|
* Quotes a column name for use in a query.
|
|
* A simple column name has no prefix.
|
|
* @param string $name column name
|
|
* @return string the properly quoted column name
|
|
*/
|
|
public function quoteSimpleColumnName($name)
|
|
{
|
|
return strpos($name, '`') !== false || $name === '*' ? $name : '`' . $name . '`';
|
|
}
|
|
|
|
/**
|
|
* Creates a query builder for the MySQL database.
|
|
* This method may be overridden by child classes to create a DBMS-specific query builder.
|
|
* @return QueryBuilder query builder instance
|
|
*/
|
|
public function createQueryBuilder()
|
|
{
|
|
return new QueryBuilder($this->db);
|
|
}
|
|
|
|
/**
|
|
* Returns all table names in the database.
|
|
* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
|
|
* @return array all table names in the database. The names have NO schema name prefix.
|
|
*/
|
|
protected function findTableNames($schema = '')
|
|
{
|
|
$sql = "SELECT DISTINCT tbl_name FROM sqlite_master WHERE tbl_name<>'sqlite_sequence'";
|
|
|
|
return $this->db->createCommand($sql)->queryColumn();
|
|
}
|
|
|
|
/**
|
|
* Loads the metadata for the specified table.
|
|
* @param string $name table name
|
|
* @return TableSchema driver dependent table metadata. Null if the table does not exist.
|
|
*/
|
|
protected function loadTableSchema($name)
|
|
{
|
|
$table = new TableSchema;
|
|
$table->name = $name;
|
|
$table->fullName = $name;
|
|
|
|
if ($this->findColumns($table)) {
|
|
$this->findConstraints($table);
|
|
|
|
return $table;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Collects the table column metadata.
|
|
* @param TableSchema $table the table metadata
|
|
* @return boolean whether the table exists in the database
|
|
*/
|
|
protected function findColumns($table)
|
|
{
|
|
$sql = "PRAGMA table_info(" . $this->quoteSimpleTableName($table->name) . ')';
|
|
$columns = $this->db->createCommand($sql)->queryAll();
|
|
if (empty($columns)) {
|
|
return false;
|
|
}
|
|
|
|
foreach ($columns as $info) {
|
|
$column = $this->loadColumnSchema($info);
|
|
$table->columns[$column->name] = $column;
|
|
if ($column->isPrimaryKey) {
|
|
$table->primaryKey[] = $column->name;
|
|
}
|
|
}
|
|
if (count($table->primaryKey) === 1 && !strncasecmp($table->columns[$table->primaryKey[0]]->dbType, 'int', 3)) {
|
|
$table->sequenceName = '';
|
|
$table->columns[$table->primaryKey[0]]->autoIncrement = true;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Collects the foreign key column details for the given table.
|
|
* @param TableSchema $table the table metadata
|
|
*/
|
|
protected function findConstraints($table)
|
|
{
|
|
$sql = "PRAGMA foreign_key_list(" . $this->quoteSimpleTableName($table->name) . ')';
|
|
$keys = $this->db->createCommand($sql)->queryAll();
|
|
foreach ($keys as $key) {
|
|
$id = (int) $key['id'];
|
|
if (!isset($table->foreignKeys[$id])) {
|
|
$table->foreignKeys[$id] = [$key['table'], $key['from'] => $key['to']];
|
|
} else {
|
|
// composite FK
|
|
$table->foreignKeys[$id][$key['from']] = $key['to'];
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns all unique indexes for the given table.
|
|
* Each array element is of the following structure:
|
|
*
|
|
* ~~~
|
|
* [
|
|
* 'IndexName1' => ['col1' [, ...]],
|
|
* 'IndexName2' => ['col2' [, ...]],
|
|
* ]
|
|
* ~~~
|
|
*
|
|
* @param TableSchema $table the table metadata
|
|
* @return array all unique indexes for the given table.
|
|
*/
|
|
public function findUniqueIndexes($table)
|
|
{
|
|
$sql = "PRAGMA index_list(" . $this->quoteSimpleTableName($table->name) . ')';
|
|
$indexes = $this->db->createCommand($sql)->queryAll();
|
|
$uniqueIndexes = [];
|
|
|
|
foreach ($indexes as $index) {
|
|
$indexName = $index['name'];
|
|
$indexInfo = $this->db->createCommand("PRAGMA index_info(" . $this->quoteValue($index['name']) . ")")->queryAll();
|
|
|
|
if ($index['unique']) {
|
|
$uniqueIndexes[$indexName] = [];
|
|
foreach ($indexInfo as $row) {
|
|
$uniqueIndexes[$indexName][] = $row['name'];
|
|
}
|
|
}
|
|
}
|
|
|
|
return $uniqueIndexes;
|
|
}
|
|
|
|
/**
|
|
* Loads the column information into a [[ColumnSchema]] object.
|
|
* @param array $info column information
|
|
* @return ColumnSchema the column schema object
|
|
*/
|
|
protected function loadColumnSchema($info)
|
|
{
|
|
$column = $this->createColumnSchema();
|
|
$column->name = $info['name'];
|
|
$column->allowNull = !$info['notnull'];
|
|
$column->isPrimaryKey = $info['pk'] != 0;
|
|
|
|
$column->dbType = strtolower($info['type']);
|
|
$column->unsigned = strpos($column->dbType, 'unsigned') !== false;
|
|
|
|
$column->type = self::TYPE_STRING;
|
|
if (preg_match('/^(\w+)(?:\(([^\)]+)\))?/', $column->dbType, $matches)) {
|
|
$type = strtolower($matches[1]);
|
|
if (isset($this->typeMap[$type])) {
|
|
$column->type = $this->typeMap[$type];
|
|
}
|
|
|
|
if (!empty($matches[2])) {
|
|
$values = explode(',', $matches[2]);
|
|
$column->size = $column->precision = (int) $values[0];
|
|
if (isset($values[1])) {
|
|
$column->scale = (int) $values[1];
|
|
}
|
|
if ($column->size === 1 && ($type === 'tinyint' || $type === 'bit')) {
|
|
$column->type = 'boolean';
|
|
} elseif ($type === 'bit') {
|
|
if ($column->size > 32) {
|
|
$column->type = 'bigint';
|
|
} elseif ($column->size === 32) {
|
|
$column->type = 'integer';
|
|
}
|
|
}
|
|
}
|
|
}
|
|
$column->phpType = $this->getColumnPhpType($column);
|
|
|
|
if (!$column->isPrimaryKey) {
|
|
if ($info['dflt_value'] === 'null' || $info['dflt_value'] === '' || $info['dflt_value'] === null) {
|
|
$column->defaultValue = null;
|
|
} elseif ($column->type === 'timestamp' && $info['dflt_value'] === 'CURRENT_TIMESTAMP') {
|
|
$column->defaultValue = new Expression('CURRENT_TIMESTAMP');
|
|
} else {
|
|
$value = trim($info['dflt_value'], "'\"");
|
|
$column->defaultValue = $column->phpTypecast($value);
|
|
}
|
|
}
|
|
|
|
return $column;
|
|
}
|
|
|
|
/**
|
|
* Sets the isolation level of the current transaction.
|
|
* @param string $level The transaction isolation level to use for this transaction.
|
|
* This can be either [[Transaction::READ_UNCOMMITTED]] or [[Transaction::SERIALIZABLE]].
|
|
* @throws \yii\base\NotSupportedException when unsupported isolation levels are used.
|
|
* SQLite only supports SERIALIZABLE and READ UNCOMMITTED.
|
|
* @see http://www.sqlite.org/pragma.html#pragma_read_uncommitted
|
|
*/
|
|
public function setTransactionIsolationLevel($level)
|
|
{
|
|
switch($level)
|
|
{
|
|
case Transaction::SERIALIZABLE:
|
|
$this->db->createCommand("PRAGMA read_uncommitted = False;")->execute();
|
|
break;
|
|
case Transaction::READ_UNCOMMITTED:
|
|
$this->db->createCommand("PRAGMA read_uncommitted = True;")->execute();
|
|
break;
|
|
default:
|
|
throw new NotSupportedException(get_class($this) . ' only supports transaction isolation levels READ UNCOMMITTED and SERIALIZABLE.');
|
|
}
|
|
}
|
|
}
|