Database::fetchColumn() - Code Metrics - Inspection of "Added Metatada" - samsonframework/orm - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 741fdb...1d6281 )

by Vitaly

created 2016-08-28 13:18 UTC

Database::fetchColumn() A

↳ Parent: Database

Complexity

Conditions	1
Paths	1

Size

Total Lines	10
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Importance

Changes	9
Bugs	2	Features	4

Metric	Value
c	9
b	2
f	4
dl	0
loc	10
rs	9.4285
cc	1
eloc	5
nc	1
nop	3

<?php declare(strict_types=1);
/**
 * Created by PhpStorm.
 * User: egorov
 * Date: 09.05.2015
 * Time: 13:05
 */
namespace samsonframework\orm;

/**
 * Class Database
 * @package samsonframework\orm
 */
class Database implements DatabaseInterface
{
    /** Table name prefix */
    public static $prefix = '';

    /** @var \PDO Database driver */
    protected $driver;

    /** @var string Database name */
    protected $database;

    /** @var int Amount of milliseconds spent on queries */
    protected $elapsed;

    /** @var int Amount queries executed */
    protected $count;

    /** Do not serialize anything */
    public function __sleep()
    {
        return array();
    }

    /**
     * Connect to a database using driver with parameters
     * @param string $database Database name
     * @param string $username Database username
     * @param string $password Database password
     * @param string $host Database host(localhost by default)
     * @param int $port Database port(3306 by default)
     * @param string $driver Database driver for interaction(MySQL by default)
     * @param string $charset Database character set
     * @return bool True if connection to database was successful
     */
    public function connect(
        $database,
        $username,
        $password,
        $host = 'localhost',
        $port = 3306,
        $driver = 'mysql',
        $charset = 'utf8'
    ) {
        // If we have not connected yet
        if ($this->driver === null) {
            $this->database = $database;

            // Check if configured database exists
            $this->driver = new PDO($host, $database, $username, $password, $charset, $port, $driver);


            // Set correct encodings
            $this->execute("set character_set_client='utf8'");
            $this->execute("set character_set_results='utf8'");
            $this->execute("set collation_connection='utf8_general_ci'");

            //new ManagerGenerator($this);
        }
    }

    /**
     * Get database name
     * @return string
     * @deprecated
     */
    public function database()
    {
        return $this->database;
    }

    /**
     * High-level database query executor
     * @param string $sql SQL statement
     * @return mixed Database query result
     * @deprecated Use execute()
     */
    public function query($sql)
    {
        return $this->execute($sql);
    }

    /**
     * Internal error beautifier.
     *
     * @param \Exception $exception
     * @param            $sql
     * @param string     $text
     *
     * @throws \Exception
     */
    private function outputError(\Exception $exception, $sql, $text = 'Error executing database query:')

    {
        throw $exception;

        echo("\n" . '<div style="font-size:12px; position:relative; background:red; z-index:9999999;">'
function fx() {
    try {
        doSomething();
        return true;
    }
    catch (\Exception $e) {
        return false;
    }

    return false;
}
            .'<div style="padding:4px 10px;">'.$text.'</div>'
            .'<div style="padding:0px 10px;">['.htmlspecialchars($exception->getMessage()).']</div>'
            .'<textarea style="display:block; width:100%; min-height:100px;">'.$sql . '</textarea></div>');
    }

    /**
     * Proxy function for executing database fetching logic with exception,
     * error, profile handling
     * @param callback $fetcher Callback for fetching
     * @return mixed Fetching function result
     */
    private function executeFetcher($fetcher, $sql)
    {
        $result = array();

        if (isset($this->driver)) {
            // Store timestamp
            $tsLast = microtime(true);

            try { // Call fetcher
                // Get argument and remove first one
                $args = func_get_args();
                array_shift($args);

                // Proxy calling of fetcher function with passing parameters
                $result = call_user_func_array($fetcher, $args);
            } catch (\PDOException $exception) {
                $this->outputError($exception, $sql, 'Error executing ['.$fetcher[1].']');
            }

            // Store queries count
            $this->count++;

            // Count elapsed time
            $this->elapsed += microtime(true) - $tsLast;
        }

        return $result;
    }

    /**
     * High-level database query executor
     * @param string $sql SQL statement
     * @return mixed Database query result
     */
    private function innerQuery($sql)
    {
        try {
            // Perform database query
            return $this->driver->prepare($sql)->execute();
        } catch (\PDOException $e) {
            $this->outputError($e, $sql);
        }

        return null;
    }

    /**
     * Retrieve array of records from a database, if $className is passed method
     * will try to create an object of that type. If request has failed than
     * method will return empty array of stdClass all arrays regarding to $className is
     * passed or not.
     *
     * @param string $sql SQL statement
     * @return array Collection of arrays or objects
     */
    private function innerFetch($sql, $className = null)
    {
        try {
            // Perform database query
            if (!isset($className)) { // Return array
                return $this->driver->query($sql)->fetchAll(\PDO::FETCH_ASSOC);
            } else { // Create object of passed class name
                return $this->driver->query($sql)->fetchAll(\PDO::FETCH_CLASS, $className, array(&$this));
            }
        } catch (\PDOException $e) {
            $this->outputError($e, $sql, 'Fetching database records:');
        }

        return array();
    }

    /**
     * Special accelerated function to retrieve db record fields instead of objects
     *
     * @param string $sql SQL statement
     * @param int $columnIndex Needed column index
     *
     * @return array Database records column value collection
     */
    private function innerFetchColumn($sql, $columnIndex)
    {
        try {
            // Perform database query
            return $this->driver->query($sql)->fetchAll(\PDO::FETCH_COLUMN, $columnIndex);
        } catch (\PDOException $e) {
            $this->outputError($e, $sql, 'Error fetching records column values:');
        }

        return array();
    }

    /**
     * {@inheritdoc}
     */
    public function execute(string $sql)
    {
        return $this->executeFetcher(array($this, 'innerQuery'), $sql);
    }

    /**
     * {@inheritdoc}
     */
    public function fetch(string $sql)
    {
        return $this->executeFetcher(array($this, 'innerFetch'), $sql);
    }

    /**
     * Special accelerated function to retrieve db record fields instead of objects
     * TODO: Change to be independent of query and class name, just SQL, this SQL
     * should only have one column in SELECT part and then we do not need parameter
     * for this as we can always take 0.
     *
     * @param string $entity Entity identifier
     * @param QueryInterface Query object
     * @param string $field Entity field identifier
     *
     * @return array Collection of rows with field value
     * @deprecated
     */
    public function fetchColumn($entity, QueryInterface $query, $field)
    {
        // TODO: Remove old attributes retrieval

        return $this->executeFetcher(
            array($this, 'innerFetchColumn'),
            $this->prepareSQL($entity, $query),
            array_search($field, array_values($entity::$_table_attributes))
        );
    }

    /**
     * Count resulting rows.
     *
     * @param string Entity identifier
     * @param QueryInterface Query object
     *
     * @return int Amount of rows
     */
    public function count($entity, QueryInterface $query)
    {
        // Modify query SQL and add counting
        $result = $this->fetch('SELECT Count(*) as __Count FROM (' . $this->prepareSQL($entity, $query) . ') as __table');

        return isset($result[0]) ? (int)$result[0]['__Count'] : 0;
    }

    /**
     * Quote variable for security reasons.
     *
     * @param string $value
     * @return string Quoted value
     */
    protected function quote($value)
    {
        return $this->driver->quote($value);
    }

    /**
     * Convert QueryInterface into SQL statement.
     *
     * @param string Entity identifier
     * @param QueryInterface Query object
     *
     * @return string SQL statement
     */
    protected function prepareSQL($entity, QueryInterface $query)

    {

    }

    /**
     * {@inheritdoc}
     */
    public function fetchArray(string $sql) : array

    {
        // TODO: Implement fetchArray() method.
    }

    /**
     * {@inheritdoc}
     */
    public function fetchObjects(string $sql, string $className) : array
    {
        return $this->toRecords(

            $className,
            $this->fetchArray($sql),
            $query->join,

            array_merge($query->own_virtual_fields, $query->virtual_fields)
        );
    }

    /**
     * {@inheritdoc}
     */
    public function fetchColumns(string $sql, int $columnIndex) : array
    {
        return $this->executeFetcher(array($this, 'innerFetchColumn'), $sql, $columnIndex);
    }

    /**
     * Regroup database rows by primary field value.
     *
     * @param array  $rows Collection of records received from database
     * @param string $primaryField Primary field name for grouping
     *
     * @return array Grouped rows by primary field value
     */
    protected function groupResults(array $rows, string $primaryField) : array
    {
        /** @var array $grouped Collection of database rows grouped by primary field value */
        $grouped = [];

        // Iterate result set
        for ($i = 0, $rowsCount = count($rows); $i < $rowsCount; $i++) {
            $row = $rows[$i];

            // Group by primary field value
            $grouped[$row[$primaryField]][] = $row;
        }

        return $grouped;
    }

    /**
     * Fill entity instance fields from row column values according to entity metadata attributes.
     *
     * @param mixed $instance Entity instance
     * @param array $attributes Metadata entity attributes
     * @param array $row        Database results row
     */
    protected function fillEntityFieldValues($instance, array $attributes, array $row)
    {
        // Iterate attribute metadata
        foreach ($attributes as $alias) {
            // If database row has aliased field column
            if (array_key_exists($alias, $row)) {
                // Store attribute value
                $instance->$alias = $row[$alias];
            } else {
                throw new \InvalidArgumentException('Database row does not have requested column:'.$alias);
            }
        }

        // Call handler for object filling
        $instance->filled();
    }

    /**
     * Create entity instances and its joined entities.
     *
     * @param array  $rows
     * @param string $primaryField
     * @param string $className
     * @param array  $joinedClassNames
     *
     * @return array
     */
    protected function createEntities(array $rows, string $primaryField, string $className, array $joinedClassNames)
    {
        $objects = [];

        /** @var array $entityRows Iterate entity rows */
        foreach ($this->groupResults($rows, $primaryField) as $primaryValue => $entityRows) {
            // Create entity instance
            $instance = $objects[$primaryValue] = new $className();

            // TODO: $attributes argument should be filled with selected fields?
            $this->fillEntityFieldValues($instance, $className::$_attributes, $entityRows[0]);

            // Iterate inner rows for nested entities creation
            foreach ($entityRows as $row) {
                // Iterate all joined entities
                foreach ($joinedClassNames as $joinedClassName) {
                    // Create joined instance and add to parent instance
                    $joinedInstance = $instance->$joinedClassName[] = new $joinedClassName();

                    // TODO: We need to change metadata retrieval
                    $this->fillEntityFieldValues($joinedInstance, $joinedClassName::$_attributes, $row);
                }
            }
        }

        return $objects;
    }
}


1			<?php declare(strict_types=1);
2			/**
3			* Created by PhpStorm.
4			* User: egorov
5			* Date: 09.05.2015
6			* Time: 13:05
7			*/
8			namespace samsonframework\orm;
9
10			/**
11			* Class Database
12			* @package samsonframework\orm
13			*/
14			class Database implements DatabaseInterface
15			{
16			/** Table name prefix */
17			public static $prefix = '';
18
19			/** @var \PDO Database driver */
20			protected $driver;
21
22			/** @var string Database name */
23			protected $database;
24
25			/** @var int Amount of milliseconds spent on queries */
26			protected $elapsed;
27
28			/** @var int Amount queries executed */
29			protected $count;
30
31			/** Do not serialize anything */
32			public function __sleep()
33			{
34			return array();
35			}
36
37			/**
38			* Connect to a database using driver with parameters
39			* @param string $database Database name
40			* @param string $username Database username
41			* @param string $password Database password
42			* @param string $host Database host(localhost by default)
43			* @param int $port Database port(3306 by default)
44			* @param string $driver Database driver for interaction(MySQL by default)
45			* @param string $charset Database character set
46			* @return bool True if connection to database was successful
47			*/
48			public function connect(
49			$database,
50			$username,
51			$password,
52			$host = 'localhost',
53			$port = 3306,
54			$driver = 'mysql',
55			$charset = 'utf8'
56			) {
57			// If we have not connected yet
58			if ($this->driver === null) {
59			$this->database = $database;
60
61			// Check if configured database exists
62			$this->driver = new PDO($host, $database, $username, $password, $charset, $port, $driver);
			0 ignored issues – show Documentation Bug introduced 2015-11-22 20:03 UTC by Report Bug Copy Issue Report It seems like `new \samsonframework\orm...harset, $port, $driver)` of type `object<samsonframework\orm\PDO>` is incompatible with the declared type `object<PDO>` of property `$driver`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
63
64			// Set correct encodings
65			$this->execute("set character_set_client='utf8'");
66			$this->execute("set character_set_results='utf8'");
67			$this->execute("set collation_connection='utf8_general_ci'");
68
69			//new ManagerGenerator($this);
70			}
71			}
72
73			/**
74			* Get database name
75			* @return string
76			* @deprecated
77			*/
78			public function database()
79			{
80			return $this->database;
81			}
82
83			/**
84			* High-level database query executor
85			* @param string $sql SQL statement
86			* @return mixed Database query result
87			* @deprecated Use execute()
88			*/
89			public function query($sql)
90			{
91			return $this->execute($sql);
92			}
93
94			/**
95			* Internal error beautifier.
96			*
97			* @param \Exception $exception
98			* @param $sql
99			* @param string $text
100			*
101			* @throws \Exception
102			*/
103			private function outputError(\Exception $exception, $sql, $text = 'Error executing database query:')
			0 ignored issues – show Unused Code introduced 2016-03-21 12:08 UTC by Report Bug Copy Issue Report The parameter `$sql` 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... Unused Code introduced 2016-03-21 12:08 UTC by Report Bug Copy Issue Report The parameter `$text` 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...
104			{
105			throw $exception;
106
107			echo("\n" . '<div style="font-size:12px; position:relative; background:red; z-index:9999999;">'
			0 ignored issues – show Unused Code introduced 2016-03-21 12:08 UTC by Report Bug Copy Issue Report `echo ' ' . '<div style="... . '</textarea></div>';` does not seem to be reachable. This check looks for unreachable code. It uses sophisticated control flow analysis techniques to find statements which will never be executed. Unreachable code is most often the result of `return`, `die` or `exit` statements that have been added for debug purposes. function fx() { try { doSomething(); return true; } catch (\Exception $e) { return false; } return false; } In the above example, the last `return false` will never be executed, because a return statement has already been met in every possible execution path. Loading history...
108			.'<div style="padding:4px 10px;">'.$text.'</div>'
109			.'<div style="padding:0px 10px;">['.htmlspecialchars($exception->getMessage()).']</div>'
110			.'<textarea style="display:block; width:100%; min-height:100px;">'.$sql . '</textarea></div>');
111			}
112
113			/**
114			* Proxy function for executing database fetching logic with exception,
115			* error, profile handling
116			* @param callback $fetcher Callback for fetching
117			* @return mixed Fetching function result
118			*/
119			private function executeFetcher($fetcher, $sql)
120			{
121			$result = array();
122
123			if (isset($this->driver)) {
124			// Store timestamp
125			$tsLast = microtime(true);
126
127			try { // Call fetcher
128			// Get argument and remove first one
129			$args = func_get_args();
130			array_shift($args);
131
132			// Proxy calling of fetcher function with passing parameters
133			$result = call_user_func_array($fetcher, $args);
134			} catch (\PDOException $exception) {
135			$this->outputError($exception, $sql, 'Error executing ['.$fetcher[1].']');
136			}
137
138			// Store queries count
139			$this->count++;
140
141			// Count elapsed time
142			$this->elapsed += microtime(true) - $tsLast;
143			}
144
145			return $result;
146			}
147
148			/**
149			* High-level database query executor
150			* @param string $sql SQL statement
151			* @return mixed Database query result
152			*/
153			private function innerQuery($sql)
154			{
155			try {
156			// Perform database query
157			return $this->driver->prepare($sql)->execute();
158			} catch (\PDOException $e) {
159			$this->outputError($e, $sql);
160			}
161
162			return null;
163			}
164
165			/**
166			* Retrieve array of records from a database, if $className is passed method
167			* will try to create an object of that type. If request has failed than
168			* method will return empty array of stdClass all arrays regarding to $className is
169			* passed or not.
170			*
171			* @param string $sql SQL statement
172			* @return array Collection of arrays or objects
173			*/
174			private function innerFetch($sql, $className = null)
175			{
176			try {
177			// Perform database query
178			if (!isset($className)) { // Return array
179			return $this->driver->query($sql)->fetchAll(\PDO::FETCH_ASSOC);
180			} else { // Create object of passed class name
181			return $this->driver->query($sql)->fetchAll(\PDO::FETCH_CLASS, $className, array(&$this));
182			}
183			} catch (\PDOException $e) {
184			$this->outputError($e, $sql, 'Fetching database records:');
185			}
186
187			return array();
188			}
189
190			/**
191			* Special accelerated function to retrieve db record fields instead of objects
192			*
193			* @param string $sql SQL statement
194			* @param int $columnIndex Needed column index
195			*
196			* @return array Database records column value collection
197			*/
198			private function innerFetchColumn($sql, $columnIndex)
199			{
200			try {
201			// Perform database query
202			return $this->driver->query($sql)->fetchAll(\PDO::FETCH_COLUMN, $columnIndex);
203			} catch (\PDOException $e) {
204			$this->outputError($e, $sql, 'Error fetching records column values:');
205			}
206
207			return array();
208			}
209
210			/**
211			* {@inheritdoc}
212			*/
213			public function execute(string $sql)
214			{
215			return $this->executeFetcher(array($this, 'innerQuery'), $sql);
216			}
217
218			/**
219			* {@inheritdoc}
220			*/
221			public function fetch(string $sql)
222			{
223			return $this->executeFetcher(array($this, 'innerFetch'), $sql);
224			}
225
226			/**
227			* Special accelerated function to retrieve db record fields instead of objects
228			* TODO: Change to be independent of query and class name, just SQL, this SQL
229			* should only have one column in SELECT part and then we do not need parameter
230			* for this as we can always take 0.
231			*
232			* @param string $entity Entity identifier
233			* @param QueryInterface Query object
234			* @param string $field Entity field identifier
235			*
236			* @return array Collection of rows with field value
237			* @deprecated
238			*/
239			public function fetchColumn($entity, QueryInterface $query, $field)
240			{
241			// TODO: Remove old attributes retrieval
242
243			return $this->executeFetcher(
244			array($this, 'innerFetchColumn'),
245			$this->prepareSQL($entity, $query),
246			array_search($field, array_values($entity::$_table_attributes))
247			);
248			}
249
250			/**
251			* Count resulting rows.
252			*
253			* @param string Entity identifier
254			* @param QueryInterface Query object
255			*
256			* @return int Amount of rows
257			*/
258			public function count($entity, QueryInterface $query)
259			{
260			// Modify query SQL and add counting
261			$result = $this->fetch('SELECT Count(*) as __Count FROM (' . $this->prepareSQL($entity, $query) . ') as __table');
262
263			return isset($result[0]) ? (int)$result[0]['__Count'] : 0;
264			}
265
266			/**
267			* Quote variable for security reasons.
268			*
269			* @param string $value
270			* @return string Quoted value
271			*/
272			protected function quote($value)
273			{
274			return $this->driver->quote($value);
275			}
276
277			/**
278			* Convert QueryInterface into SQL statement.
279			*
280			* @param string Entity identifier
281			* @param QueryInterface Query object
282			*
283			* @return string SQL statement
284			*/
285			protected function prepareSQL($entity, QueryInterface $query)
			0 ignored issues – show Unused Code introduced 2016-01-04 18:43 UTC by Report Bug Copy Issue Report The parameter `$entity` 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... Unused Code introduced 2016-01-04 18:43 UTC by Report Bug Copy Issue Report The parameter `$query` 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...
286			{
287
288			}
289
290			/**
291			* {@inheritdoc}
292			*/
293			public function fetchArray(string $sql) : array
			0 ignored issues – show Unused Code introduced 2016-08-28 13:21 UTC by Report Bug Copy Issue Report The parameter `$sql` 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...
294			{
295			// TODO: Implement fetchArray() method.
296			}
297
298			/**
299			* {@inheritdoc}
300			*/
301			public function fetchObjects(string $sql, string $className) : array
302			{
303			return $this->toRecords(
			0 ignored issues – show Bug introduced 2016-08-28 13:21 UTC by Report Bug Copy Issue Report The method `toRecords()` does not seem to exist on `object<samsonframework\orm\Database>`. This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces. This is most likely a typographical error or the method has been renamed. Loading history...
304			$className,
305			$this->fetchArray($sql),
306			$query->join,
			0 ignored issues – show Bug introduced 2016-08-28 13:21 UTC by Report Bug Copy Issue Report The variable `$query` 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...
307			array_merge($query->own_virtual_fields, $query->virtual_fields)
308			);
309			}
310
311			/**
312			* {@inheritdoc}
313			*/
314			public function fetchColumns(string $sql, int $columnIndex) : array
315			{
316			return $this->executeFetcher(array($this, 'innerFetchColumn'), $sql, $columnIndex);
317			}
318
319			/**
320			* Regroup database rows by primary field value.
321			*
322			* @param array $rows Collection of records received from database
323			* @param string $primaryField Primary field name for grouping
324			*
325			* @return array Grouped rows by primary field value
326			*/
327			protected function groupResults(array $rows, string $primaryField) : array
328			{
329			/** @var array $grouped Collection of database rows grouped by primary field value */
330			$grouped = [];
331
332			// Iterate result set
333			for ($i = 0, $rowsCount = count($rows); $i < $rowsCount; $i++) {
334			$row = $rows[$i];
335
336			// Group by primary field value
337			$grouped[$row[$primaryField]][] = $row;
338			}
339
340			return $grouped;
341			}
342
343			/**
344			* Fill entity instance fields from row column values according to entity metadata attributes.
345			*
346			* @param mixed $instance Entity instance
347			* @param array $attributes Metadata entity attributes
348			* @param array $row Database results row
349			*/
350			protected function fillEntityFieldValues($instance, array $attributes, array $row)
351			{
352			// Iterate attribute metadata
353			foreach ($attributes as $alias) {
354			// If database row has aliased field column
355			if (array_key_exists($alias, $row)) {
356			// Store attribute value
357			$instance->$alias = $row[$alias];
358			} else {
359			throw new \InvalidArgumentException('Database row does not have requested column:'.$alias);
360			}
361			}
362
363			// Call handler for object filling
364			$instance->filled();
365			}
366
367			/**
368			* Create entity instances and its joined entities.
369			*
370			* @param array $rows
371			* @param string $primaryField
372			* @param string $className
373			* @param array $joinedClassNames
374			*
375			* @return array
376			*/
377			protected function createEntities(array $rows, string $primaryField, string $className, array $joinedClassNames)
378			{
379			$objects = [];
380
381			/** @var array $entityRows Iterate entity rows */
382			foreach ($this->groupResults($rows, $primaryField) as $primaryValue => $entityRows) {
383			// Create entity instance
384			$instance = $objects[$primaryValue] = new $className();
385
386			// TODO: $attributes argument should be filled with selected fields?
387			$this->fillEntityFieldValues($instance, $className::$_attributes, $entityRows[0]);
388
389			// Iterate inner rows for nested entities creation
390			foreach ($entityRows as $row) {
391			// Iterate all joined entities
392			foreach ($joinedClassNames as $joinedClassName) {
393			// Create joined instance and add to parent instance
394			$joinedInstance = $instance->$joinedClassName[] = new $joinedClassName();
395
396			// TODO: We need to change metadata retrieval
397			$this->fillEntityFieldValues($joinedInstance, $joinedClassName::$_attributes, $row);
398			}
399			}
400			}
401
402			return $objects;
403			}
404			}
405

samsonframework / orm

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Database::fetchColumn() A

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