Completed
Push — refactor-db-tests ( 8ba032...86f17c )
by Carsten
10:02
created

QueryBuilder::createIndex()   A

Complexity

Conditions 2
Paths 2

Size

Total Lines 8
Code Lines 6

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 0
CRAP Score 6

Importance

Changes 0
Metric Value
dl 0
loc 8
rs 9.4285
c 0
b 0
f 0
ccs 0
cts 5
cp 0
cc 2
eloc 6
nc 2
nop 4
crap 6
1
<?php
2
/**
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 * @link http://www.yiiframework.com/
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 * @copyright Copyright (c) 2008 Yii Software LLC
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 * @license http://www.yiiframework.com/license/
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 */
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8
namespace yii\db\mysql;
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use yii\base\InvalidParamException;
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use yii\db\Exception;
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use yii\db\Expression;
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/**
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 * QueryBuilder is the query builder for MySQL databases.
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 *
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 * @author Qiang Xue <[email protected]>
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 * @since 2.0
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 */
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class QueryBuilder extends \yii\db\QueryBuilder
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{
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    /**
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     * @var array mapping from abstract column types (keys) to physical column types (values).
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     */
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    public $typeMap = [
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        Schema::TYPE_PK => 'int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY',
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        Schema::TYPE_UPK => 'int(11) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY',
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        Schema::TYPE_BIGPK => 'bigint(20) NOT NULL AUTO_INCREMENT PRIMARY KEY',
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        Schema::TYPE_UBIGPK => 'bigint(20) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY',
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        Schema::TYPE_CHAR => 'char(1)',
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        Schema::TYPE_STRING => 'varchar(255)',
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        Schema::TYPE_TEXT => 'text',
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        Schema::TYPE_SMALLINT => 'smallint(6)',
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        Schema::TYPE_INTEGER => 'int(11)',
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        Schema::TYPE_BIGINT => 'bigint(20)',
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        Schema::TYPE_FLOAT => 'float',
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        Schema::TYPE_DOUBLE => 'double',
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        Schema::TYPE_DECIMAL => 'decimal(10,0)',
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        Schema::TYPE_DATETIME => 'datetime',
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        Schema::TYPE_TIMESTAMP => 'timestamp',
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        Schema::TYPE_TIME => 'time',
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        Schema::TYPE_DATE => 'date',
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        Schema::TYPE_BINARY => 'blob',
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        Schema::TYPE_BOOLEAN => 'tinyint(1)',
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        Schema::TYPE_MONEY => 'decimal(19,4)',
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    ];
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48
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    /**
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     * Builds a SQL statement for renaming a column.
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     * @param string $table the table whose column is to be renamed. The name will be properly quoted by the method.
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     * @param string $oldName the old name of the column. The name will be properly quoted by the method.
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     * @param string $newName the new name of the column. The name will be properly quoted by the method.
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     * @return string the SQL statement for renaming a DB column.
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     * @throws Exception
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     */
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    public function renameColumn($table, $oldName, $newName)
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    {
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        $quotedTable = $this->db->quoteTableName($table);
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        $row = $this->db->createCommand('SHOW CREATE TABLE ' . $quotedTable)->queryOne();
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        if ($row === false) {
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            throw new Exception("Unable to find column '$oldName' in table '$table'.");
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        }
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        if (isset($row['Create Table'])) {
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            $sql = $row['Create Table'];
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        } else {
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            $row = array_values($row);
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            $sql = $row[1];
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        }
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        if (preg_match_all('/^\s*`(.*?)`\s+(.*?),?$/m', $sql, $matches)) {
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            foreach ($matches[1] as $i => $c) {
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                if ($c === $oldName) {
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                    return "ALTER TABLE $quotedTable CHANGE "
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                        . $this->db->quoteColumnName($oldName) . ' '
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                        . $this->db->quoteColumnName($newName) . ' '
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                        . $matches[2][$i];
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                }
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            }
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        }
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        // try to give back a SQL anyway
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        return "ALTER TABLE $quotedTable CHANGE "
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            . $this->db->quoteColumnName($oldName) . ' '
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            . $this->db->quoteColumnName($newName);
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    }
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    /**
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     * @inheritdoc
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     * @see https://bugs.mysql.com/bug.php?id=48875
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     */
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    public function createIndex($name, $table, $columns, $unique = false)
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    {
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        return 'ALTER TABLE '
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        . $this->db->quoteTableName($table)
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        . ($unique ? ' ADD UNIQUE INDEX ' : ' ADD INDEX ')
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        . $this->db->quoteTableName($name)
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        . ' (' . $this->buildColumns($columns) . ')';
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    }
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    /**
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     * Builds a SQL statement for dropping a foreign key constraint.
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     * @param string $name the name of the foreign key constraint to be dropped. The name will be properly quoted by the method.
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     * @param string $table the table whose foreign is to be dropped. The name will be properly quoted by the method.
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     * @return string the SQL statement for dropping a foreign key constraint.
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     */
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    public function dropForeignKey($name, $table)
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    {
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        return 'ALTER TABLE ' . $this->db->quoteTableName($table)
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            . ' DROP FOREIGN KEY ' . $this->db->quoteColumnName($name);
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    }
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    /**
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     * Builds a SQL statement for removing a primary key constraint to an existing table.
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     * @param string $name the name of the primary key constraint to be removed.
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     * @param string $table the table that the primary key constraint will be removed from.
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     * @return string the SQL statement for removing a primary key constraint from an existing table.
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     */
117 1
    public function dropPrimaryKey($name, $table)
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    {
119 1
        return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' DROP PRIMARY KEY';
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    }
121
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    /**
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     * Creates a SQL statement for resetting the sequence value of a table's primary key.
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     * The sequence will be reset such that the primary key of the next new row inserted
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     * will have the specified value or 1.
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     * @param string $tableName the name of the table whose primary key sequence will be reset
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     * @param mixed $value the value for the primary key of the next new row inserted. If this is not set,
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     * the next new row's primary key will have a value 1.
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     * @return string the SQL statement for resetting sequence
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     * @throws InvalidParamException if the table does not exist or there is no sequence associated with the table.
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     */
132 2
    public function resetSequence($tableName, $value = null)
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    {
134 2
        $table = $this->db->getTableSchema($tableName);
135 2
        if ($table !== null && $table->sequenceName !== null) {
136 2
            $tableName = $this->db->quoteTableName($tableName);
137 2
            if ($value === null) {
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                $key = reset($table->primaryKey);
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                $value = $this->db->createCommand("SELECT MAX(`$key`) FROM $tableName")->queryScalar() + 1;
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            } else {
141 2
                $value = (int) $value;
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            }
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144 2
            return "ALTER TABLE $tableName AUTO_INCREMENT=$value";
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        } elseif ($table === null) {
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            throw new InvalidParamException("Table not found: $tableName");
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        } else {
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            throw new InvalidParamException("There is no sequence associated with table '$tableName'.");
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        }
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    }
151
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    /**
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     * Builds a SQL statement for enabling or disabling integrity check.
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     * @param boolean $check whether to turn on or off the integrity check.
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     * @param string $schema the schema of the tables. Meaningless for MySQL.
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     * @param string $table the table name. Meaningless for MySQL.
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     * @return string the SQL statement for checking integrity
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     */
159 2
    public function checkIntegrity($check = true, $schema = '', $table = '')
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    {
161 2
        return 'SET FOREIGN_KEY_CHECKS = ' . ($check ? 1 : 0);
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    }
163
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    /**
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     * @inheritdoc
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     */
167 284
    public function buildLimit($limit, $offset)
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    {
169 284
        $sql = '';
170 284
        if ($this->hasLimit($limit)) {
171 12
            $sql = 'LIMIT ' . $limit;
172 12
            if ($this->hasOffset($offset)) {
173 1
                $sql .= ' OFFSET ' . $offset;
174 1
            }
175 284
        } elseif ($this->hasOffset($offset)) {
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            // limit is not optional in MySQL
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            // http://stackoverflow.com/a/271650/1106908
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            // http://dev.mysql.com/doc/refman/5.0/en/select.html#idm47619502796240
179 2
            $sql = "LIMIT $offset, 18446744073709551615"; // 2^64-1
180 2
        }
181
182 284
        return $sql;
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    }
184
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    /**
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     * @inheritdoc
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     */
188 116
    public function insert($table, $columns, &$params)
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    {
190 116
        $schema = $this->db->getSchema();
191 116
        if (($tableSchema = $schema->getTableSchema($table)) !== null) {
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            $columnSchemas = $tableSchema->columns;
193 115
        } else {
194 2
            $columnSchemas = [];
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        }
196 116
        $names = [];
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        $placeholders = [];
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        foreach ($columns as $name => $value) {
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            $names[] = $schema->quoteColumnName($name);
200 115
            if ($value instanceof Expression) {
201 1
                $placeholders[] = $value->expression;
202 1
                foreach ($value->params as $n => $v) {
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                    $params[$n] = $v;
204 1
                }
205 1
            } else {
206 115
                $phName = self::PARAM_PREFIX . count($params);
207 115
                $placeholders[] = $phName;
208 115
                $params[$phName] = !is_array($value) && isset($columnSchemas[$name]) ? $columnSchemas[$name]->dbTypecast($value) : $value;
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            }
210 116
        }
211 116
        if (empty($names) && $tableSchema !== null) {
212 1
            $columns = !empty($tableSchema->primaryKey) ? $tableSchema->primaryKey : reset($tableSchema->columns)->name;
213 1
            foreach ($columns as $name) {
214 1
                $names[] = $schema->quoteColumnName($name);
215 1
                $placeholders[] = 'DEFAULT';
216 1
            }
217 1
        }
218
219 116
        return 'INSERT INTO ' . $schema->quoteTableName($table)
220 116
            . (!empty($names) ? ' (' . implode(', ', $names) . ')' : '')
221 116
            . (!empty($placeholders) ? ' VALUES (' . implode(', ', $placeholders) . ')' : ' DEFAULT VALUES');
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    }
223
224
    /**
225
     * @inheritdoc
226
     * @since 2.0.8
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     */
228 1
    public function addCommentOnColumn($table, $column, $comment)
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    {
230 1
        $definition = $this->getColumnDefinition($table, $column);
231 1
        $definition = trim(preg_replace("/COMMENT '(.*?)'/i", '', $definition));
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233 1
        return 'ALTER TABLE ' . $this->db->quoteTableName($table)
234 1
            . ' CHANGE ' . $this->db->quoteColumnName($column)
235 1
            . ' ' . $this->db->quoteColumnName($column)
236 1
            . (empty($definition) ? '' : ' ' . $definition)
237 1
            . ' COMMENT ' . $this->db->quoteValue($comment);
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    }
239
240
    /**
241
     * @inheritdoc
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     * @since 2.0.8
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     */
244 1
    public function addCommentOnTable($table, $comment)
245
    {
246 1
        return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' COMMENT ' . $this->db->quoteValue($comment);
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    }
248
249
    /**
250
     * @inheritdoc
251
     * @since 2.0.8
252
     */
253 1
    public function dropCommentFromColumn($table, $column)
254
    {
255 1
        return $this->addCommentOnColumn($table, $column, '');
256
    }
257
258
    /**
259
     * @inheritdoc
260
     * @since 2.0.8
261
     */
262 1
    public function dropCommentFromTable($table)
263
    {
264 1
        return $this->addCommentOnTable($table, '');
265
    }
266
267
268
    /**
269
     * Gets column definition.
270
     *
271
     * @param string $table table name
272
     * @param string $column column name
273
     * @return null|string the column definition
274
     * @throws Exception in case when table does not contain column
275
     */
276 1
    private function getColumnDefinition($table, $column)
277
    {
278 1
        $quotedTable = $this->db->quoteTableName($table);
279 1
        $row = $this->db->createCommand('SHOW CREATE TABLE ' . $quotedTable)->queryOne();
280 1
        if ($row === false) {
281
            throw new Exception("Unable to find column '$column' in table '$table'.");
282
        }
283 1
        if (isset($row['Create Table'])) {
284 1
            $sql = $row['Create Table'];
285 1
        } else {
286
            $row = array_values($row);
287
            $sql = $row[1];
288
        }
289 1
        if (preg_match_all('/^\s*`(.*?)`\s+(.*?),?$/m', $sql, $matches)) {
290 1
            foreach ($matches[1] as $i => $c) {
291 1
                if ($c === $column) {
292 1
                    return $matches[2][$i];
293
                }
294 1
            }
295
        }
296
        return null;
297
    }
298
}
299