Schema::loadTableConstraints() - Code Metrics - Inspection of "Fixes #16903: Fixed 'yii\validators\NumberValidato..." - rob006/yii2-dev - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( bbf2ff...d7ffda )

by Robert

created 2018-11-28 00:27 UTC

Schema::loadTableConstraints() F

↳ Parent: Schema

Complexity

Conditions	16
Paths	572

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	34
CRAP Score	16.864

Importance

Changes

Metric	Value
dl	0
loc	72
ccs	34
cts	40
cp	0.85
rs	1.9944
c	0
b	0
f	0
cc	16
nc	572
nop	2
crap	16.864

How to fix Long Method Complexity

<?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\CheckConstraint;
use yii\db\ColumnSchema;
use yii\db\Constraint;
use yii\db\ConstraintFinderInterface;
use yii\db\ConstraintFinderTrait;
use yii\db\Expression;
use yii\db\ForeignKeyConstraint;
use yii\db\IndexConstraint;
use yii\db\SqlToken;
use yii\db\TableSchema;
use yii\db\Transaction;
use yii\helpers\ArrayHelper;

/**
 * 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 <[email protected]>
 * @since 2.0
 */
class Schema extends \yii\db\Schema implements ConstraintFinderInterface
{
    use ConstraintFinderTrait;

    /**
     * @var array mapping from physical column types (keys) to abstract column types (values)
     */
    public $typeMap = [
        'tinyint' => self::TYPE_TINYINT,
        '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_DOUBLE,
        '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_CHAR,
        '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,
    ];

    /**
     * {@inheritdoc}
     */
    protected $tableQuoteCharacter = '`';
    /**
     * {@inheritdoc}
     */
    protected $columnQuoteCharacter = '`';


    /**
     * {@inheritdoc}
     */
    protected function findTableNames($schema = '')
    {
        $sql = "SELECT DISTINCT tbl_name FROM sqlite_master WHERE tbl_name<>'sqlite_sequence' ORDER BY tbl_name";
        return $this->db->createCommand($sql)->queryColumn();
    }

    /**
     * {@inheritdoc}
     */
    protected function loadTableSchema($name)
    {
        $table = new TableSchema();
        $table->name = $name;
        $table->fullName = $name;

        if ($this->findColumns($table)) {
            $this->findConstraints($table);
            return $table;
        }

        return null;
    }

    /**
     * {@inheritdoc}
     */
    protected function loadTablePrimaryKey($tableName)
    {
        return $this->loadTableConstraints($tableName, 'primaryKey');
    }

    /**
     * {@inheritdoc}
     */
    protected function loadTableForeignKeys($tableName)
    {
        $foreignKeys = $this->db->createCommand('PRAGMA FOREIGN_KEY_LIST (' . $this->quoteValue($tableName) . ')')->queryAll();
        $foreignKeys = $this->normalizePdoRowKeyCase($foreignKeys, true);
        $foreignKeys = ArrayHelper::index($foreignKeys, null, 'table');
        ArrayHelper::multisort($foreignKeys, 'seq', SORT_ASC, SORT_NUMERIC);
        $result = [];
        foreach ($foreignKeys as $table => $foreignKey) {
            $result[] = new ForeignKeyConstraint([
                'columnNames' => ArrayHelper::getColumn($foreignKey, 'from'),
                'foreignTableName' => $table,
                'foreignColumnNames' => ArrayHelper::getColumn($foreignKey, 'to'),
                'onDelete' => isset($foreignKey[0]['on_delete']) ? $foreignKey[0]['on_delete'] : null,
                'onUpdate' => isset($foreignKey[0]['on_update']) ? $foreignKey[0]['on_update'] : null,
            ]);
        }

        return $result;
    }

    /**
     * {@inheritdoc}
     */
    protected function loadTableIndexes($tableName)
    {
        return $this->loadTableConstraints($tableName, 'indexes');
    }

    /**
     * {@inheritdoc}
     */
    protected function loadTableUniques($tableName)
    {
        return $this->loadTableConstraints($tableName, 'uniques');
    }

    /**
     * {@inheritdoc}
     */
    protected function loadTableChecks($tableName)
    {
        $sql = $this->db->createCommand('SELECT `sql` FROM `sqlite_master` WHERE name = :tableName', [
            ':tableName' => $tableName,
        ])->queryScalar();
        /** @var $code SqlToken[]|SqlToken[][]|SqlToken[][][] */
        $code = (new SqlTokenizer($sql))->tokenize();
/**
 * @return array|string
 */
function returnsDifferentValues($x) {
    if ($x) {
        return 'foo';
    }

    return array();
}

$x = returnsDifferentValues($y);
if (is_array($x)) {
    // $x is an array.
}
        $pattern = (new SqlTokenizer('any CREATE any TABLE any()'))->tokenize();
        if (!$code[0]->matches($pattern, 0, $firstMatchIndex, $lastMatchIndex)) {

            return [];
        }

        $createTableToken = $code[0][$lastMatchIndex - 1];
        $result = [];
        $offset = 0;
        while (true) {
            $pattern = (new SqlTokenizer('any CHECK()'))->tokenize();
            if (!$createTableToken->matches($pattern, $offset, $firstMatchIndex, $offset)) {
                break;
            }

            $checkSql = $createTableToken[$offset - 1]->getSql();
            $name = null;
            $pattern = (new SqlTokenizer('CONSTRAINT any'))->tokenize();
            if (isset($createTableToken[$firstMatchIndex - 2]) && $createTableToken->matches($pattern, $firstMatchIndex - 2)) {
                $name = $createTableToken[$firstMatchIndex - 1]->content;
            }
            $result[] = new CheckConstraint([
                'name' => $name,
                'expression' => $checkSql,
            ]);
        }

        return $result;
    }

    /**
     * {@inheritdoc}
     * @throws NotSupportedException if this method is called.
     */
    protected function loadTableDefaultValues($tableName)

    {
        throw new NotSupportedException('SQLite does not support default value constraints.');
    }

    /**
     * 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);
    }

    /**
     * {@inheritdoc}
     * @return ColumnSchemaBuilder column schema builder instance
     */
    public function createColumnSchemaBuilder($type, $length = null)
    {
        return new ColumnSchemaBuilder($type, $length);
    }

    /**
     * Collects the table column metadata.
     * @param TableSchema $table the table metadata
     * @return bool whether the table exists in the database
     */
    protected function findColumns($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:
     *
     * ```php
     * [
     *     '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 $level The transaction isolation level to use for this transaction.
     * This can be either [[Transaction::READ_UNCOMMITTED]] or [[Transaction::SERIALIZABLE]].
     * @throws NotSupportedException when unsupported isolation levels are used.
     * SQLite only supports SERIALIZABLE and READ UNCOMMITTED.
     * @see http://www.sqlite.org/pragma.html#pragma_read_uncommitted
     */
    public function setTransactionIsolationLevel($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.');
        }
    }

    /**
     * Returns table columns info.
     * @param string $tableName table name
     * @return array
     */
    private function loadTableColumnsInfo($tableName)
    {
        $tableColumns = $this->db->createCommand('PRAGMA TABLE_INFO (' . $this->quoteValue($tableName) . ')')->queryAll();
        $tableColumns = $this->normalizePdoRowKeyCase($tableColumns, true);

        return ArrayHelper::index($tableColumns, 'cid');
    }

    /**
     * Loads multiple types of constraints and returns the specified ones.
     * @param string $tableName table name.
     * @param string $returnType return type:
     * - primaryKey
     * - indexes
     * - uniques
     * @return mixed constraints.
     */
    private function loadTableConstraints($tableName, $returnType)
    {
        $indexes = $this->db->createCommand('PRAGMA INDEX_LIST (' . $this->quoteValue($tableName) . ')')->queryAll();
        $indexes = $this->normalizePdoRowKeyCase($indexes, true);
        $tableColumns = null;
        if (!empty($indexes) && !isset($indexes[0]['origin'])) {
            /*
             * SQLite may not have an "origin" column in INDEX_LIST
             * See https://www.sqlite.org/src/info/2743846cdba572f6
             */
            $tableColumns = $this->loadTableColumnsInfo($tableName);
        }
        $result = [
            'primaryKey' => null,
            'indexes' => [],
            'uniques' => [],
        ];
        foreach ($indexes as $index) {
            $columns = $this->db->createCommand('PRAGMA INDEX_INFO (' . $this->quoteValue($index['name']) . ')')->queryAll();
            $columns = $this->normalizePdoRowKeyCase($columns, true);
            ArrayHelper::multisort($columns, 'seqno', SORT_ASC, SORT_NUMERIC);
            if ($tableColumns !== null) {
                // SQLite may not have an "origin" column in INDEX_LIST
                $index['origin'] = 'c';
                if (!empty($columns) && $tableColumns[$columns[0]['cid']]['pk'] > 0) {
                    $index['origin'] = 'pk';
                } elseif ($index['unique'] && $this->isSystemIdentifier($index['name'])) {
                    $index['origin'] = 'u';
                }
            }
            $result['indexes'][] = new IndexConstraint([
                'isPrimary' => $index['origin'] === 'pk',
                'isUnique' => (bool) $index['unique'],
                'name' => $index['name'],
                'columnNames' => ArrayHelper::getColumn($columns, 'name'),
            ]);
            if ($index['origin'] === 'u') {
                $result['uniques'][] = new Constraint([
                    'name' => $index['name'],
                    'columnNames' => ArrayHelper::getColumn($columns, 'name'),
                ]);
            } elseif ($index['origin'] === 'pk') {
                $result['primaryKey'] = new Constraint([
                    'columnNames' => ArrayHelper::getColumn($columns, 'name'),
                ]);
            }
        }

        if ($result['primaryKey'] === null) {
            /*
             * Additional check for PK in case of INTEGER PRIMARY KEY with ROWID
             * See https://www.sqlite.org/lang_createtable.html#primkeyconst
             */
            if ($tableColumns === null) {
                $tableColumns = $this->loadTableColumnsInfo($tableName);
            }
            foreach ($tableColumns as $tableColumn) {
                if ($tableColumn['pk'] > 0) {
                    $result['primaryKey'] = new Constraint([
                        'columnNames' => [$tableColumn['name']],
                    ]);
                    break;
                }
            }
        }

        foreach ($result as $type => $data) {
            $this->setTableMetadata($tableName, $type, $data);
        }

        return $result[$returnType];
    }

    /**
     * Return whether the specified identifier is a SQLite system identifier.
     * @param string $identifier
     * @return bool
     * @see https://www.sqlite.org/src/artifact/74108007d286232f
     */
    private function isSystemIdentifier($identifier)
    {
        return strncmp($identifier, 'sqlite_', 7) === 0;
    }
}


1		<?php
2		/**
3		* @link http://www.yiiframework.com/
4		* @copyright Copyright (c) 2008 Yii Software LLC
5		* @license http://www.yiiframework.com/license/
6		*/
7
8		namespace yii\db\sqlite;
9
10		use yii\base\NotSupportedException;
11		use yii\db\CheckConstraint;
12		use yii\db\ColumnSchema;
13		use yii\db\Constraint;
14		use yii\db\ConstraintFinderInterface;
15		use yii\db\ConstraintFinderTrait;
16		use yii\db\Expression;
17		use yii\db\ForeignKeyConstraint;
18		use yii\db\IndexConstraint;
19		use yii\db\SqlToken;
20		use yii\db\TableSchema;
21		use yii\db\Transaction;
22		use yii\helpers\ArrayHelper;
23
24		/**
25		* Schema is the class for retrieving metadata from a SQLite (2/3) database.
26		*
27		* @property string $transactionIsolationLevel The transaction isolation level to use for this transaction.
28		* This can be either [[Transaction::READ_UNCOMMITTED]] or [[Transaction::SERIALIZABLE]].
29		*
30		* @author Qiang Xue <[email protected]>
31		* @since 2.0
32		*/
33		class Schema extends \yii\db\Schema implements ConstraintFinderInterface
34		{
35		use ConstraintFinderTrait;
36
37		/**
38		* @var array mapping from physical column types (keys) to abstract column types (values)
39		*/
40		public $typeMap = [
41		'tinyint' => self::TYPE_TINYINT,
42		'bit' => self::TYPE_SMALLINT,
43		'boolean' => self::TYPE_BOOLEAN,
44		'bool' => self::TYPE_BOOLEAN,
45		'smallint' => self::TYPE_SMALLINT,
46		'mediumint' => self::TYPE_INTEGER,
47		'int' => self::TYPE_INTEGER,
48		'integer' => self::TYPE_INTEGER,
49		'bigint' => self::TYPE_BIGINT,
50		'float' => self::TYPE_FLOAT,
51		'double' => self::TYPE_DOUBLE,
52		'real' => self::TYPE_FLOAT,
53		'decimal' => self::TYPE_DECIMAL,
54		'numeric' => self::TYPE_DECIMAL,
55		'tinytext' => self::TYPE_TEXT,
56		'mediumtext' => self::TYPE_TEXT,
57		'longtext' => self::TYPE_TEXT,
58		'text' => self::TYPE_TEXT,
59		'varchar' => self::TYPE_STRING,
60		'string' => self::TYPE_STRING,
61		'char' => self::TYPE_CHAR,
62		'blob' => self::TYPE_BINARY,
63		'datetime' => self::TYPE_DATETIME,
64		'year' => self::TYPE_DATE,
65		'date' => self::TYPE_DATE,
66		'time' => self::TYPE_TIME,
67		'timestamp' => self::TYPE_TIMESTAMP,
68		'enum' => self::TYPE_STRING,
69		];
70
71		/**
72		* {@inheritdoc}
73		*/
74		protected $tableQuoteCharacter = '`';
75		/**
76		* {@inheritdoc}
77		*/
78		protected $columnQuoteCharacter = '`';
79
80
81		/**
82		* {@inheritdoc}
83		*/
84	6	protected function findTableNames($schema = '')
85		{
86	6	$sql = "SELECT DISTINCT tbl_name FROM sqlite_master WHERE tbl_name<>'sqlite_sequence' ORDER BY tbl_name";
87	6	return $this->db->createCommand($sql)->queryColumn();
88		}
89
90		/**
91		* {@inheritdoc}
92		*/
93	293	protected function loadTableSchema($name)
94		{
95	293	$table = new TableSchema();
96	293	$table->name = $name;
97	293	$table->fullName = $name;
98
99	293	if ($this->findColumns($table)) {
100	271	$this->findConstraints($table);
101	271	return $table;
102		}
103
104	57	return null;
105		}
106
107		/**
108		* {@inheritdoc}
109		*/
110	37	protected function loadTablePrimaryKey($tableName)
111		{
112	37	return $this->loadTableConstraints($tableName, 'primaryKey');
113		}
114
115		/**
116		* {@inheritdoc}
117		*/
118	3	protected function loadTableForeignKeys($tableName)
119		{
120	3	$foreignKeys = $this->db->createCommand('PRAGMA FOREIGN_KEY_LIST (' . $this->quoteValue($tableName) . ')')->queryAll();
121	3	$foreignKeys = $this->normalizePdoRowKeyCase($foreignKeys, true);
122	3	$foreignKeys = ArrayHelper::index($foreignKeys, null, 'table');
123	3	ArrayHelper::multisort($foreignKeys, 'seq', SORT_ASC, SORT_NUMERIC);
124	3	$result = [];
125	3	foreach ($foreignKeys as $table => $foreignKey) {
126	3	$result[] = new ForeignKeyConstraint([
127	3	'columnNames' => ArrayHelper::getColumn($foreignKey, 'from'),
128	3	'foreignTableName' => $table,
129	3	'foreignColumnNames' => ArrayHelper::getColumn($foreignKey, 'to'),
130	3	'onDelete' => isset($foreignKey[0]['on_delete']) ? $foreignKey[0]['on_delete'] : null,
131	3	'onUpdate' => isset($foreignKey[0]['on_update']) ? $foreignKey[0]['on_update'] : null,
132		]);
133		}
134
135	3	return $result;
136		}
137
138		/**
139		* {@inheritdoc}
140		*/
141	10	protected function loadTableIndexes($tableName)
142		{
143	10	return $this->loadTableConstraints($tableName, 'indexes');
144		}
145
146		/**
147		* {@inheritdoc}
148		*/
149	12	protected function loadTableUniques($tableName)
150		{
151	12	return $this->loadTableConstraints($tableName, 'uniques');
152		}
153
154		/**
155		* {@inheritdoc}
156		*/
157	12	protected function loadTableChecks($tableName)
158		{
159	12	$sql = $this->db->createCommand('SELECT `sql` FROM `sqlite_master` WHERE name = :tableName', [
160	12	':tableName' => $tableName,
161	12	])->queryScalar();
162		/** @var $code SqlToken[]\|SqlToken[][]\|SqlToken[][][] */
163	12	$code = (new SqlTokenizer($sql))->tokenize();
		0 ignored issues – show Bug introduced 2017-07-10 10:46 UTC by Report Bug Copy Issue Report It seems like `$sql` defined by `$this->db->createCommand...leName))->queryScalar()` on line `159` can also be of type `false` or `null`; however, `yii\db\SqlTokenizer::__construct()` does only seem to accept `string`, maybe add an additional type check? If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check: /** * @return array\|string */ function returnsDifferentValues($x) { if ($x) { return 'foo'; } return array(); } $x = returnsDifferentValues($y); if (is_array($x)) { // $x is an array. } If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue. Loading history...
164	12	$pattern = (new SqlTokenizer('any CREATE any TABLE any()'))->tokenize();
165	12	if (!$code[0]->matches($pattern, 0, $firstMatchIndex, $lastMatchIndex)) {
		0 ignored issues – show Bug introduced 2017-07-10 10:46 UTC by Report Bug Copy Issue Report The variable `$firstMatchIndex` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history... Bug introduced 2017-07-10 10:46 UTC by Report Bug Copy Issue Report The variable `$lastMatchIndex` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history...
166		return [];
167		}
168
169	12	$createTableToken = $code[0][$lastMatchIndex - 1];
170	12	$result = [];
171	12	$offset = 0;
172	12	while (true) {
173	12	$pattern = (new SqlTokenizer('any CHECK()'))->tokenize();
174	12	if (!$createTableToken->matches($pattern, $offset, $firstMatchIndex, $offset)) {
175	12	break;
176		}
177
178	3	$checkSql = $createTableToken[$offset - 1]->getSql();
179	3	$name = null;
180	3	$pattern = (new SqlTokenizer('CONSTRAINT any'))->tokenize();
181	3	if (isset($createTableToken[$firstMatchIndex - 2]) && $createTableToken->matches($pattern, $firstMatchIndex - 2)) {
182		$name = $createTableToken[$firstMatchIndex - 1]->content;
183		}
184	3	$result[] = new CheckConstraint([
185	3	'name' => $name,
186	3	'expression' => $checkSql,
187		]);
188		}
189
190	12	return $result;
191		}
192
193		/**
194		* {@inheritdoc}
195		* @throws NotSupportedException if this method is called.
196		*/
197	12	protected function loadTableDefaultValues($tableName)
		0 ignored issues – show Unused Code introduced 2017-08-16 21:46 UTC by Report Bug Copy Issue Report The parameter `$tableName` is not used and could be removed. This check looks from parameters that have been defined for a function or method, but which are not used in the method body. Loading history...
198		{
199	12	throw new NotSupportedException('SQLite does not support default value constraints.');
200		}
201
202		/**
203		* Creates a query builder for the MySQL database.
204		* This method may be overridden by child classes to create a DBMS-specific query builder.
205		* @return QueryBuilder query builder instance
206		*/
207	270	public function createQueryBuilder()
208		{
209	270	return new QueryBuilder($this->db);
210		}
211
212		/**
213		* {@inheritdoc}
214		* @return ColumnSchemaBuilder column schema builder instance
215		*/
216	10	public function createColumnSchemaBuilder($type, $length = null)
217		{
218	10	return new ColumnSchemaBuilder($type, $length);
219		}
220
221		/**
222		* Collects the table column metadata.
223		* @param TableSchema $table the table metadata
224		* @return bool whether the table exists in the database
225		*/
226	293	protected function findColumns($table)
227		{
228	293	$sql = 'PRAGMA table_info(' . $this->quoteSimpleTableName($table->name) . ')';
229	293	$columns = $this->db->createCommand($sql)->queryAll();
230	293	if (empty($columns)) {
231	57	return false;
232		}
233
234	271	foreach ($columns as $info) {
235	271	$column = $this->loadColumnSchema($info);
236	271	$table->columns[$column->name] = $column;
237	271	if ($column->isPrimaryKey) {
238	271	$table->primaryKey[] = $column->name;
239		}
240		}
241	271	if (count($table->primaryKey) === 1 && !strncasecmp($table->columns[$table->primaryKey[0]]->dbType, 'int', 3)) {
242	212	$table->sequenceName = '';
243	212	$table->columns[$table->primaryKey[0]]->autoIncrement = true;
244		}
245
246	271	return true;
247		}
248
249		/**
250		* Collects the foreign key column details for the given table.
251		* @param TableSchema $table the table metadata
252		*/
253	271	protected function findConstraints($table)
254		{
255	271	$sql = 'PRAGMA foreign_key_list(' . $this->quoteSimpleTableName($table->name) . ')';
256	271	$keys = $this->db->createCommand($sql)->queryAll();
257	271	foreach ($keys as $key) {
258	7	$id = (int) $key['id'];
259	7	if (!isset($table->foreignKeys[$id])) {
260	7	$table->foreignKeys[$id] = [$key['table'], $key['from'] => $key['to']];
261		} else {
262		// composite FK
263	7	$table->foreignKeys[$id][$key['from']] = $key['to'];
264		}
265		}
266	271	}
267
268		/**
269		* Returns all unique indexes for the given table.
270		*
271		* Each array element is of the following structure:
272		*
273		* ```php
274		* [
275		* 'IndexName1' => ['col1' [, ...]],
276		* 'IndexName2' => ['col2' [, ...]],
277		* ]
278		* ```
279		*
280		* @param TableSchema $table the table metadata
281		* @return array all unique indexes for the given table.
282		*/
283	1	public function findUniqueIndexes($table)
284		{
285	1	$sql = 'PRAGMA index_list(' . $this->quoteSimpleTableName($table->name) . ')';
286	1	$indexes = $this->db->createCommand($sql)->queryAll();
287	1	$uniqueIndexes = [];
288
289	1	foreach ($indexes as $index) {
290	1	$indexName = $index['name'];
291	1	$indexInfo = $this->db->createCommand('PRAGMA index_info(' . $this->quoteValue($index['name']) . ')')->queryAll();
292
293	1	if ($index['unique']) {
294	1	$uniqueIndexes[$indexName] = [];
295	1	foreach ($indexInfo as $row) {
296	1	$uniqueIndexes[$indexName][] = $row['name'];
297		}
298		}
299		}
300
301	1	return $uniqueIndexes;
302		}
303
304		/**
305		* Loads the column information into a [[ColumnSchema]] object.
306		* @param array $info column information
307		* @return ColumnSchema the column schema object
308		*/
309	271	protected function loadColumnSchema($info)
310		{
311	271	$column = $this->createColumnSchema();
312	271	$column->name = $info['name'];
313	271	$column->allowNull = !$info['notnull'];
314	271	$column->isPrimaryKey = $info['pk'] != 0;
315
316	271	$column->dbType = strtolower($info['type']);
317	271	$column->unsigned = strpos($column->dbType, 'unsigned') !== false;
318
319	271	$column->type = self::TYPE_STRING;
320	271	if (preg_match('/^(\w+)(?:\(([^\)]+)\))?/', $column->dbType, $matches)) {
321	271	$type = strtolower($matches[1]);
322	271	if (isset($this->typeMap[$type])) {
323	271	$column->type = $this->typeMap[$type];
324		}
325
326	271	if (!empty($matches[2])) {
327	258	$values = explode(',', $matches[2]);
328	258	$column->size = $column->precision = (int) $values[0];
329	258	if (isset($values[1])) {
330	84	$column->scale = (int) $values[1];
331		}
332	258	if ($column->size === 1 && ($type === 'tinyint' \|\| $type === 'bit')) {
333	19	$column->type = 'boolean';
334	258	} elseif ($type === 'bit') {
335		if ($column->size > 32) {
336		$column->type = 'bigint';
337		} elseif ($column->size === 32) {
338		$column->type = 'integer';
339		}
340		}
341		}
342		}
343	271	$column->phpType = $this->getColumnPhpType($column);
344
345	271	if (!$column->isPrimaryKey) {
346	270	if ($info['dflt_value'] === 'null' \|\| $info['dflt_value'] === '' \|\| $info['dflt_value'] === null) {
347	269	$column->defaultValue = null;
348	115	} elseif ($column->type === 'timestamp' && $info['dflt_value'] === 'CURRENT_TIMESTAMP') {
349	19	$column->defaultValue = new Expression('CURRENT_TIMESTAMP');
350		} else {
351	115	$value = trim($info['dflt_value'], "'\"");
352	115	$column->defaultValue = $column->phpTypecast($value);
353		}
354		}
355
356	271	return $column;
357		}
358
359		/**
360		* Sets the isolation level of the current transaction.
361		* @param string $level The transaction isolation level to use for this transaction.
362		* This can be either [[Transaction::READ_UNCOMMITTED]] or [[Transaction::SERIALIZABLE]].
363		* @throws NotSupportedException when unsupported isolation levels are used.
364		* SQLite only supports SERIALIZABLE and READ UNCOMMITTED.
365		* @see http://www.sqlite.org/pragma.html#pragma_read_uncommitted
366		*/
367	2	public function setTransactionIsolationLevel($level)
368		{
369		switch ($level) {
370	2	case Transaction::SERIALIZABLE:
371	1	$this->db->createCommand('PRAGMA read_uncommitted = False;')->execute();
372	1	break;
373	2	case Transaction::READ_UNCOMMITTED:
374	2	$this->db->createCommand('PRAGMA read_uncommitted = True;')->execute();
375	2	break;
376		default:
377		throw new NotSupportedException(get_class($this) . ' only supports transaction isolation levels READ UNCOMMITTED and SERIALIZABLE.');
378		}
379	2	}
380
381		/**
382		* Returns table columns info.
383		* @param string $tableName table name
384		* @return array
385		*/
386	30	private function loadTableColumnsInfo($tableName)
387		{
388	30	$tableColumns = $this->db->createCommand('PRAGMA TABLE_INFO (' . $this->quoteValue($tableName) . ')')->queryAll();
389	30	$tableColumns = $this->normalizePdoRowKeyCase($tableColumns, true);
390
391	30	return ArrayHelper::index($tableColumns, 'cid');
392		}
393
394		/**
395		* Loads multiple types of constraints and returns the specified ones.
396		* @param string $tableName table name.
397		* @param string $returnType return type:
398		* - primaryKey
399		* - indexes
400		* - uniques
401		* @return mixed constraints.
402		*/
403	59	private function loadTableConstraints($tableName, $returnType)
404		{
405	59	$indexes = $this->db->createCommand('PRAGMA INDEX_LIST (' . $this->quoteValue($tableName) . ')')->queryAll();
406	59	$indexes = $this->normalizePdoRowKeyCase($indexes, true);
407	59	$tableColumns = null;
408	59	if (!empty($indexes) && !isset($indexes[0]['origin'])) {
409		/*
410		* SQLite may not have an "origin" column in INDEX_LIST
411		* See https://www.sqlite.org/src/info/2743846cdba572f6
412		*/
413		$tableColumns = $this->loadTableColumnsInfo($tableName);
414		}
415		$result = [
416	59	'primaryKey' => null,
417		'indexes' => [],
418		'uniques' => [],
419		];
420	59	foreach ($indexes as $index) {
421	50	$columns = $this->db->createCommand('PRAGMA INDEX_INFO (' . $this->quoteValue($index['name']) . ')')->queryAll();
422	50	$columns = $this->normalizePdoRowKeyCase($columns, true);
423	50	ArrayHelper::multisort($columns, 'seqno', SORT_ASC, SORT_NUMERIC);
424	50	if ($tableColumns !== null) {
425		// SQLite may not have an "origin" column in INDEX_LIST
426		$index['origin'] = 'c';
427		if (!empty($columns) && $tableColumns[$columns[0]['cid']]['pk'] > 0) {
428		$index['origin'] = 'pk';
429		} elseif ($index['unique'] && $this->isSystemIdentifier($index['name'])) {
430		$index['origin'] = 'u';
431		}
432		}
433	50	$result['indexes'][] = new IndexConstraint([
434	50	'isPrimary' => $index['origin'] === 'pk',
435	50	'isUnique' => (bool) $index['unique'],
436	50	'name' => $index['name'],
437	50	'columnNames' => ArrayHelper::getColumn($columns, 'name'),
438		]);
439	50	if ($index['origin'] === 'u') {
440	44	$result['uniques'][] = new Constraint([
441	44	'name' => $index['name'],
442	44	'columnNames' => ArrayHelper::getColumn($columns, 'name'),
443		]);
444	30	} elseif ($index['origin'] === 'pk') {
445	29	$result['primaryKey'] = new Constraint([
446	50	'columnNames' => ArrayHelper::getColumn($columns, 'name'),
447		]);
448		}
449		}
450
451	59	if ($result['primaryKey'] === null) {
452		/*
453		* Additional check for PK in case of INTEGER PRIMARY KEY with ROWID
454		* See https://www.sqlite.org/lang_createtable.html#primkeyconst
455		*/
456	30	if ($tableColumns === null) {
457	30	$tableColumns = $this->loadTableColumnsInfo($tableName);
458		}
459	30	foreach ($tableColumns as $tableColumn) {
460	30	if ($tableColumn['pk'] > 0) {
461	20	$result['primaryKey'] = new Constraint([
462	20	'columnNames' => [$tableColumn['name']],
463		]);
464	30	break;
465		}
466		}
467		}
468
469	59	foreach ($result as $type => $data) {
470	59	$this->setTableMetadata($tableName, $type, $data);
471		}
472
473	59	return $result[$returnType];
474		}
475
476		/**
477		* Return whether the specified identifier is a SQLite system identifier.
478		* @param string $identifier
479		* @return bool
480		* @see https://www.sqlite.org/src/artifact/74108007d286232f
481		*/
482		private function isSystemIdentifier($identifier)
483		{
484		return strncmp($identifier, 'sqlite_', 7) === 0;
485		}
486		}
487

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