QueryBuilder::dropPrimaryKey() - Code Metrics - Inspection of "Add `yii\web\Request::getOrigin()` method that ret..." - yiisoft/yii2 - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 2914db...46bf3c )

by Carsten

created 2017-07-12 09:10 UTC

QueryBuilder::dropPrimaryKey() A

↳ Parent: QueryBuilder

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes

Metric	Value
dl	0
loc	4
ccs	0
cts	2
cp	0
rs	10
c	0
b	0
f	0
cc	1
eloc	2
nc	1
nop	2
crap	2

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\db\mysql;

use yii\base\InvalidParamException;
use yii\base\NotSupportedException;
use yii\db\Exception;
use yii\db\Expression;

/**
 * QueryBuilder is the query builder for MySQL databases.
 *
 * @author Qiang Xue <[email protected]>
 * @since 2.0
 */
class QueryBuilder extends \yii\db\QueryBuilder
{
    /**
     * @var array mapping from abstract column types (keys) to physical column types (values).
     */
    public $typeMap = [
        Schema::TYPE_PK => 'int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY',
        Schema::TYPE_UPK => 'int(10) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY',
        Schema::TYPE_BIGPK => 'bigint(20) NOT NULL AUTO_INCREMENT PRIMARY KEY',
        Schema::TYPE_UBIGPK => 'bigint(20) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY',
        Schema::TYPE_CHAR => 'char(1)',
        Schema::TYPE_STRING => 'varchar(255)',
        Schema::TYPE_TEXT => 'text',
        Schema::TYPE_SMALLINT => 'smallint(6)',
        Schema::TYPE_INTEGER => 'int(11)',
        Schema::TYPE_BIGINT => 'bigint(20)',
        Schema::TYPE_FLOAT => 'float',
        Schema::TYPE_DOUBLE => 'double',
        Schema::TYPE_DECIMAL => 'decimal(10,0)',
        Schema::TYPE_DATETIME => 'datetime',
        Schema::TYPE_TIMESTAMP => 'timestamp',
        Schema::TYPE_TIME => 'time',
        Schema::TYPE_DATE => 'date',
        Schema::TYPE_BINARY => 'blob',
        Schema::TYPE_BOOLEAN => 'tinyint(1)',
        Schema::TYPE_MONEY => 'decimal(19,4)',
    ];


    /**
     * Builds a SQL statement for renaming a column.
     * @param string $table the table whose column is to be renamed. The name will be properly quoted by the method.
     * @param string $oldName the old name of the column. The name will be properly quoted by the method.
     * @param string $newName the new name of the column. The name will be properly quoted by the method.
     * @return string the SQL statement for renaming a DB column.
     * @throws Exception
     */
    public function renameColumn($table, $oldName, $newName)
    {
        $quotedTable = $this->db->quoteTableName($table);
        $row = $this->db->createCommand('SHOW CREATE TABLE ' . $quotedTable)->queryOne();
        if ($row === false) {
            throw new Exception("Unable to find column '$oldName' in table '$table'.");
        }
        if (isset($row['Create Table'])) {
            $sql = $row['Create Table'];
        } else {
            $row = array_values($row);
            $sql = $row[1];
        }
        if (preg_match_all('/^\s*`(.*?)`\s+(.*?),?$/m', $sql, $matches)) {
            foreach ($matches[1] as $i => $c) {
                if ($c === $oldName) {
                    return "ALTER TABLE $quotedTable CHANGE "
                        . $this->db->quoteColumnName($oldName) . ' '
                        . $this->db->quoteColumnName($newName) . ' '
                        . $matches[2][$i];
                }
            }
        }
        // try to give back a SQL anyway
        return "ALTER TABLE $quotedTable CHANGE "
            . $this->db->quoteColumnName($oldName) . ' '
            . $this->db->quoteColumnName($newName);
    }

    /**
     * @inheritdoc
     * @see https://bugs.mysql.com/bug.php?id=48875
     */
    public function createIndex($name, $table, $columns, $unique = false)
    {
        return 'ALTER TABLE '
        . $this->db->quoteTableName($table)
        . ($unique ? ' ADD UNIQUE INDEX ' : ' ADD INDEX ')
        . $this->db->quoteTableName($name)
        . ' (' . $this->buildColumns($columns) . ')';
    }

    /**
     * Builds a SQL statement for dropping a foreign key constraint.
     * @param string $name the name of the foreign key constraint to be dropped. The name will be properly quoted by the method.
     * @param string $table the table whose foreign is to be dropped. The name will be properly quoted by the method.
     * @return string the SQL statement for dropping a foreign key constraint.
     */
    public function dropForeignKey($name, $table)
    {
        return 'ALTER TABLE ' . $this->db->quoteTableName($table)
            . ' DROP FOREIGN KEY ' . $this->db->quoteColumnName($name);
    }

    /**
     * Builds a SQL statement for removing a primary key constraint to an existing table.
     * @param string $name the name of the primary key constraint to be removed.
     * @param string $table the table that the primary key constraint will be removed from.
     * @return string the SQL statement for removing a primary key constraint from an existing table.
     */
    public function dropPrimaryKey($name, $table)
    {
        return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' DROP PRIMARY KEY';
    }

    /**
     * @inheritDoc
     */
    public function dropUnique($name, $table)
    {
        return $this->dropIndex($name, $table);
    }

    /**
     * @inheritDoc
     * @throws NotSupportedException this is not supported by MySQL.
     */
    public function addCheck($name, $table, $expression)
    {
        throw new NotSupportedException(__METHOD__ . ' is not supported by MySQL.');
    }

    /**
     * @inheritDoc
     * @throws NotSupportedException this is not supported by MySQL.
     */
    public function dropCheck($name, $table)
    {
        throw new NotSupportedException(__METHOD__ . ' is not supported by MySQL.');
    }

    /**
     * Creates a SQL statement for resetting the sequence value of a table's primary key.
     * The sequence will be reset such that the primary key of the next new row inserted
     * will have the specified value or 1.
     * @param string $tableName the name of the table whose primary key sequence will be reset
     * @param mixed $value the value for the primary key of the next new row inserted. If this is not set,
     * the next new row's primary key will have a value 1.
     * @return string the SQL statement for resetting sequence
     * @throws InvalidParamException if the table does not exist or there is no sequence associated with the table.
     */
    public function resetSequence($tableName, $value = null)
    {
        $table = $this->db->getTableSchema($tableName);
        if ($table !== null && $table->sequenceName !== null) {
            $tableName = $this->db->quoteTableName($tableName);
            if ($value === null) {
                $key = reset($table->primaryKey);
                $value = $this->db->createCommand("SELECT MAX(`$key`) FROM $tableName")->queryScalar() + 1;
            } else {
                $value = (int) $value;
            }

            return "ALTER TABLE $tableName AUTO_INCREMENT=$value";
        } elseif ($table === null) {
            throw new InvalidParamException("Table not found: $tableName");
        }

        throw new InvalidParamException("There is no sequence associated with table '$tableName'.");
    }

    /**
     * Builds a SQL statement for enabling or disabling integrity check.
     * @param bool $check whether to turn on or off the integrity check.
     * @param string $schema the schema of the tables. Meaningless for MySQL.
     * @param string $table the table name. Meaningless for MySQL.
     * @return string the SQL statement for checking integrity
     */
    public function checkIntegrity($check = true, $schema = '', $table = '')
    {
        return 'SET FOREIGN_KEY_CHECKS = ' . ($check ? 1 : 0);
    }

    /**
     * @inheritdoc
     */
    public function buildLimit($limit, $offset)
    {
        $sql = '';
        if ($this->hasLimit($limit)) {
            $sql = 'LIMIT ' . $limit;
            if ($this->hasOffset($offset)) {
                $sql .= ' OFFSET ' . $offset;
            }
        } elseif ($this->hasOffset($offset)) {
            // limit is not optional in MySQL
            // http://stackoverflow.com/a/271650/1106908
            // http://dev.mysql.com/doc/refman/5.0/en/select.html#idm47619502796240
            $sql = "LIMIT $offset, 18446744073709551615"; // 2^64-1
        }

        return $sql;
    }

    /**
     * @inheritdoc
     */
    protected function hasLimit($limit)
    {
        // In MySQL limit argument must be nonnegative integer constant
        return ctype_digit((string) $limit);
    }

    /**
     * @inheritdoc
     */
    protected function hasOffset($offset)
    {
        // In MySQL offset argument must be nonnegative integer constant
        $offset = (string) $offset;
        return ctype_digit($offset) && $offset !== '0';
    }

    /**
     * @inheritdoc
     */
    public function insert($table, $columns, &$params)
    {
        $schema = $this->db->getSchema();
        if (($tableSchema = $schema->getTableSchema($table)) !== null) {
            $columnSchemas = $tableSchema->columns;
        } else {
            $columnSchemas = [];
        }
        $names = [];
        $placeholders = [];
        $values = ' DEFAULT VALUES';
        if ($columns instanceof \yii\db\Query) {
            list($names, $values, $params) = $this->prepareInsertSelectSubQuery($columns, $schema, $params);
        } else {
            foreach ($columns as $name => $value) {
                $names[] = $schema->quoteColumnName($name);
                if ($value instanceof Expression) {
                    $placeholders[] = $value->expression;
                    foreach ($value->params as $n => $v) {
                        $params[$n] = $v;
                    }
                } elseif ($value instanceof \yii\db\Query) {
                    list($sql, $params) = $this->build($value, $params);
                    $placeholders[] = "($sql)";
                } else {
                    $phName = self::PARAM_PREFIX . count($params);
                    $placeholders[] = $phName;
                    $params[$phName] = !is_array($value) && isset($columnSchemas[$name]) ? $columnSchemas[$name]->dbTypecast($value) : $value;
                }
            }
            if (empty($names) && $tableSchema !== null) {
                $columns = !empty($tableSchema->primaryKey) ? $tableSchema->primaryKey : [reset($tableSchema->columns)->name];
                foreach ($columns as $name) {
                    $names[] = $schema->quoteColumnName($name);
                    $placeholders[] = 'DEFAULT';
                }
            }
        }

        return 'INSERT INTO ' . $schema->quoteTableName($table)
            . (!empty($names) ? ' (' . implode(', ', $names) . ')' : '')
            . (!empty($placeholders) ? ' VALUES (' . implode(', ', $placeholders) . ')' : $values);
    }

    /**
     * @inheritdoc
     * @since 2.0.8
     */
    public function addCommentOnColumn($table, $column, $comment)
    {
        $definition = $this->getColumnDefinition($table, $column);
        $definition = trim(preg_replace("/COMMENT '(.*?)'/i", '', $definition));

        return 'ALTER TABLE ' . $this->db->quoteTableName($table)
            . ' CHANGE ' . $this->db->quoteColumnName($column)
            . ' ' . $this->db->quoteColumnName($column)
            . (empty($definition) ? '' : ' ' . $definition)
            . ' COMMENT ' . $this->db->quoteValue($comment);
    }

    /**
     * @inheritdoc
     * @since 2.0.8
     */
    public function addCommentOnTable($table, $comment)
    {
        return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' COMMENT ' . $this->db->quoteValue($comment);
    }

    /**
     * @inheritdoc
     * @since 2.0.8
     */
    public function dropCommentFromColumn($table, $column)
    {
        return $this->addCommentOnColumn($table, $column, '');
    }

    /**
     * @inheritdoc
     * @since 2.0.8
     */
    public function dropCommentFromTable($table)
    {
        return $this->addCommentOnTable($table, '');
    }


    /**
     * Gets column definition.
     *
     * @param string $table table name
     * @param string $column column name
     * @return null|string the column definition
     * @throws Exception in case when table does not contain column
     */
    private function getColumnDefinition($table, $column)
    {
        $quotedTable = $this->db->quoteTableName($table);
        $row = $this->db->createCommand('SHOW CREATE TABLE ' . $quotedTable)->queryOne();
        if ($row === false) {
            throw new Exception("Unable to find column '$column' in table '$table'.");
        }
        if (isset($row['Create Table'])) {
            $sql = $row['Create Table'];
        } else {
            $row = array_values($row);
            $sql = $row[1];
        }
        if (preg_match_all('/^\s*`(.*?)`\s+(.*?),?$/m', $sql, $matches)) {
            foreach ($matches[1] as $i => $c) {
                if ($c === $column) {
                    return $matches[2][$i];
                }
            }
        }
        return null;
    }
}


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\mysql;
9
10		use yii\base\InvalidParamException;
11		use yii\base\NotSupportedException;
12		use yii\db\Exception;
13		use yii\db\Expression;
14
15		/**
16		* QueryBuilder is the query builder for MySQL databases.
17		*
18		* @author Qiang Xue <[email protected]>
19		* @since 2.0
20		*/
21		class QueryBuilder extends \yii\db\QueryBuilder
22		{
23		/**
24		* @var array mapping from abstract column types (keys) to physical column types (values).
25		*/
26		public $typeMap = [
27		Schema::TYPE_PK => 'int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY',
28		Schema::TYPE_UPK => 'int(10) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY',
29		Schema::TYPE_BIGPK => 'bigint(20) NOT NULL AUTO_INCREMENT PRIMARY KEY',
30		Schema::TYPE_UBIGPK => 'bigint(20) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY',
31		Schema::TYPE_CHAR => 'char(1)',
32		Schema::TYPE_STRING => 'varchar(255)',
33		Schema::TYPE_TEXT => 'text',
34		Schema::TYPE_SMALLINT => 'smallint(6)',
35		Schema::TYPE_INTEGER => 'int(11)',
36		Schema::TYPE_BIGINT => 'bigint(20)',
37		Schema::TYPE_FLOAT => 'float',
38		Schema::TYPE_DOUBLE => 'double',
39		Schema::TYPE_DECIMAL => 'decimal(10,0)',
40		Schema::TYPE_DATETIME => 'datetime',
41		Schema::TYPE_TIMESTAMP => 'timestamp',
42		Schema::TYPE_TIME => 'time',
43		Schema::TYPE_DATE => 'date',
44		Schema::TYPE_BINARY => 'blob',
45		Schema::TYPE_BOOLEAN => 'tinyint(1)',
46		Schema::TYPE_MONEY => 'decimal(19,4)',
47		];
48
49
50		/**
51		* Builds a SQL statement for renaming a column.
52		* @param string $table the table whose column is to be renamed. The name will be properly quoted by the method.
53		* @param string $oldName the old name of the column. The name will be properly quoted by the method.
54		* @param string $newName the new name of the column. The name will be properly quoted by the method.
55		* @return string the SQL statement for renaming a DB column.
56		* @throws Exception
57		*/
58		public function renameColumn($table, $oldName, $newName)
59		{
60		$quotedTable = $this->db->quoteTableName($table);
61		$row = $this->db->createCommand('SHOW CREATE TABLE ' . $quotedTable)->queryOne();
62		if ($row === false) {
63		throw new Exception("Unable to find column '$oldName' in table '$table'.");
64		}
65		if (isset($row['Create Table'])) {
66		$sql = $row['Create Table'];
67		} else {
68		$row = array_values($row);
69		$sql = $row[1];
70		}
71		if (preg_match_all('/^\s`(.?)`\s+(.*?),?$/m', $sql, $matches)) {
72		foreach ($matches[1] as $i => $c) {
73		if ($c === $oldName) {
74		return "ALTER TABLE $quotedTable CHANGE "
75		. $this->db->quoteColumnName($oldName) . ' '
76		. $this->db->quoteColumnName($newName) . ' '
77		. $matches[2][$i];
78		}
79		}
80		}
81		// try to give back a SQL anyway
82		return "ALTER TABLE $quotedTable CHANGE "
83		. $this->db->quoteColumnName($oldName) . ' '
84		. $this->db->quoteColumnName($newName);
85		}
86
87		/**
88		* @inheritdoc
89		* @see https://bugs.mysql.com/bug.php?id=48875
90		*/
91		public function createIndex($name, $table, $columns, $unique = false)
92		{
93		return 'ALTER TABLE '
94		. $this->db->quoteTableName($table)
95		. ($unique ? ' ADD UNIQUE INDEX ' : ' ADD INDEX ')
96		. $this->db->quoteTableName($name)
97		. ' (' . $this->buildColumns($columns) . ')';
98		}
99
100		/**
101		* Builds a SQL statement for dropping a foreign key constraint.
102		* @param string $name the name of the foreign key constraint to be dropped. The name will be properly quoted by the method.
103		* @param string $table the table whose foreign is to be dropped. The name will be properly quoted by the method.
104		* @return string the SQL statement for dropping a foreign key constraint.
105		*/
106		public function dropForeignKey($name, $table)
107		{
108		return 'ALTER TABLE ' . $this->db->quoteTableName($table)
109		. ' DROP FOREIGN KEY ' . $this->db->quoteColumnName($name);
110		}
111
112		/**
113		* Builds a SQL statement for removing a primary key constraint to an existing table.
114		* @param string $name the name of the primary key constraint to be removed.
115		* @param string $table the table that the primary key constraint will be removed from.
116		* @return string the SQL statement for removing a primary key constraint from an existing table.
117		*/
118		public function dropPrimaryKey($name, $table)
119		{
120		return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' DROP PRIMARY KEY';
121		}
122
123		/**
124		* @inheritDoc
125		*/
126		public function dropUnique($name, $table)
127		{
128		return $this->dropIndex($name, $table);
129		}
130
131		/**
132		* @inheritDoc
133		* @throws NotSupportedException this is not supported by MySQL.
134		*/
135		public function addCheck($name, $table, $expression)
136		{
137		throw new NotSupportedException(__METHOD__ . ' is not supported by MySQL.');
138		}
139
140		/**
141		* @inheritDoc
142		* @throws NotSupportedException this is not supported by MySQL.
143		*/
144		public function dropCheck($name, $table)
145		{
146		throw new NotSupportedException(__METHOD__ . ' is not supported by MySQL.');
147		}
148
149		/**
150		* Creates a SQL statement for resetting the sequence value of a table's primary key.
151		* The sequence will be reset such that the primary key of the next new row inserted
152		* will have the specified value or 1.
153		* @param string $tableName the name of the table whose primary key sequence will be reset
154		* @param mixed $value the value for the primary key of the next new row inserted. If this is not set,
155		* the next new row's primary key will have a value 1.
156		* @return string the SQL statement for resetting sequence
157		* @throws InvalidParamException if the table does not exist or there is no sequence associated with the table.
158		*/
159	1	public function resetSequence($tableName, $value = null)
160		{
161	1	$table = $this->db->getTableSchema($tableName);
162		if ($table !== null && $table->sequenceName !== null) {
163		$tableName = $this->db->quoteTableName($tableName);
164		if ($value === null) {
165		$key = reset($table->primaryKey);
166		$value = $this->db->createCommand("SELECT MAX(`$key`) FROM $tableName")->queryScalar() + 1;
167		} else {
168		$value = (int) $value;
169		}
170
171		return "ALTER TABLE $tableName AUTO_INCREMENT=$value";
172		} elseif ($table === null) {
173		throw new InvalidParamException("Table not found: $tableName");
174		}
175
176		throw new InvalidParamException("There is no sequence associated with table '$tableName'.");
177		}
178
179		/**
180		* Builds a SQL statement for enabling or disabling integrity check.
181		* @param bool $check whether to turn on or off the integrity check.
182		* @param string $schema the schema of the tables. Meaningless for MySQL.
183		* @param string $table the table name. Meaningless for MySQL.
184		* @return string the SQL statement for checking integrity
185		*/
186		public function checkIntegrity($check = true, $schema = '', $table = '')
187		{
188		return 'SET FOREIGN_KEY_CHECKS = ' . ($check ? 1 : 0);
189		}
190
191		/**
192		* @inheritdoc
193		*/
194	100	public function buildLimit($limit, $offset)
195		{
196	100	$sql = '';
197	100	if ($this->hasLimit($limit)) {
198		$sql = 'LIMIT ' . $limit;
199		if ($this->hasOffset($offset)) {
200		$sql .= ' OFFSET ' . $offset;
201		}
202	100	} elseif ($this->hasOffset($offset)) {
203		// limit is not optional in MySQL
204		// http://stackoverflow.com/a/271650/1106908
205		// http://dev.mysql.com/doc/refman/5.0/en/select.html#idm47619502796240
206		$sql = "LIMIT $offset, 18446744073709551615"; // 2^64-1
207		}
208
209	100	return $sql;
210		}
211
212		/**
213		* @inheritdoc
214		*/
215	100	protected function hasLimit($limit)
216		{
217		// In MySQL limit argument must be nonnegative integer constant
218	100	return ctype_digit((string) $limit);
219		}
220
221		/**
222		* @inheritdoc
223		*/
224	100	protected function hasOffset($offset)
225		{
226		// In MySQL offset argument must be nonnegative integer constant
227	100	$offset = (string) $offset;
228	100	return ctype_digit($offset) && $offset !== '0';
229		}
230
231		/**
232		* @inheritdoc
233		*/
234		public function insert($table, $columns, &$params)
235		{
236		$schema = $this->db->getSchema();
237		if (($tableSchema = $schema->getTableSchema($table)) !== null) {
238		$columnSchemas = $tableSchema->columns;
239		} else {
240		$columnSchemas = [];
241		}
242		$names = [];
243		$placeholders = [];
244		$values = ' DEFAULT VALUES';
245		if ($columns instanceof \yii\db\Query) {
246		list($names, $values, $params) = $this->prepareInsertSelectSubQuery($columns, $schema, $params);
247		} else {
248		foreach ($columns as $name => $value) {
249		$names[] = $schema->quoteColumnName($name);
250		if ($value instanceof Expression) {
251		$placeholders[] = $value->expression;
252		foreach ($value->params as $n => $v) {
253		$params[$n] = $v;
254		}
255		} elseif ($value instanceof \yii\db\Query) {
256		list($sql, $params) = $this->build($value, $params);
257		$placeholders[] = "($sql)";
258		} else {
259		$phName = self::PARAM_PREFIX . count($params);
260		$placeholders[] = $phName;
261		$params[$phName] = !is_array($value) && isset($columnSchemas[$name]) ? $columnSchemas[$name]->dbTypecast($value) : $value;
262		}
263		}
264		if (empty($names) && $tableSchema !== null) {
265		$columns = !empty($tableSchema->primaryKey) ? $tableSchema->primaryKey : [reset($tableSchema->columns)->name];
266		foreach ($columns as $name) {
267		$names[] = $schema->quoteColumnName($name);
268		$placeholders[] = 'DEFAULT';
269		}
270		}
271		}
272
273		return 'INSERT INTO ' . $schema->quoteTableName($table)
274		. (!empty($names) ? ' (' . implode(', ', $names) . ')' : '')
275		. (!empty($placeholders) ? ' VALUES (' . implode(', ', $placeholders) . ')' : $values);
276		}
277
278		/**
279		* @inheritdoc
280		* @since 2.0.8
281		*/
282	1	public function addCommentOnColumn($table, $column, $comment)
283		{
284	1	$definition = $this->getColumnDefinition($table, $column);
285		$definition = trim(preg_replace("/COMMENT '(.*?)'/i", '', $definition));
286
287		return 'ALTER TABLE ' . $this->db->quoteTableName($table)
288		. ' CHANGE ' . $this->db->quoteColumnName($column)
289		. ' ' . $this->db->quoteColumnName($column)
290		. (empty($definition) ? '' : ' ' . $definition)
291		. ' COMMENT ' . $this->db->quoteValue($comment);
292		}
293
294		/**
295		* @inheritdoc
296		* @since 2.0.8
297		*/
298	1	public function addCommentOnTable($table, $comment)
299		{
300	1	return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' COMMENT ' . $this->db->quoteValue($comment);
301		}
302
303		/**
304		* @inheritdoc
305		* @since 2.0.8
306		*/
307		public function dropCommentFromColumn($table, $column)
308		{
309		return $this->addCommentOnColumn($table, $column, '');
310		}
311
312		/**
313		* @inheritdoc
314		* @since 2.0.8
315		*/
316		public function dropCommentFromTable($table)
317		{
318		return $this->addCommentOnTable($table, '');
319		}
320
321
322		/**
323		* Gets column definition.
324		*
325		* @param string $table table name
326		* @param string $column column name
327		* @return null\|string the column definition
328		* @throws Exception in case when table does not contain column
329		*/
330	1	private function getColumnDefinition($table, $column)
331		{
332	1	$quotedTable = $this->db->quoteTableName($table);
333	1	$row = $this->db->createCommand('SHOW CREATE TABLE ' . $quotedTable)->queryOne();
334		if ($row === false) {
335		throw new Exception("Unable to find column '$column' in table '$table'.");
336		}
337		if (isset($row['Create Table'])) {
338		$sql = $row['Create Table'];
339		} else {
340		$row = array_values($row);
341		$sql = $row[1];
342		}
343		if (preg_match_all('/^\s`(.?)`\s+(.*?),?$/m', $sql, $matches)) {
344		foreach ($matches[1] as $i => $c) {
345		if ($c === $column) {
346		return $matches[2][$i];
347		}
348		}
349		}
350		return null;
351		}
352		}
353

yiisoft / yii2

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QueryBuilder::dropPrimaryKey() A

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