...

framework/db/dao/ColumnSchema.php

@@ -19,7 +19,7 @@ namespace yii\db\dao;
 class ColumnSchema extends \yii\base\Component
 {
 	/**
-	 * The followings are supported abstract column data types.
+	 * The followings are the supported abstract column data types.
 	 */
 	const TYPE_STRING = 'string';
 	const TYPE_TEXT = 'text';

framework/db/dao/QueryBuilder.php

@@ -34,7 +34,7 @@ class QueryBuilder extends \yii\base\Object
 	 */
 	public $connection;
 	/**
-	 * @var Driver the database driver
+	 * @var Driver the database driver used for this query builder.
 	 */
 	public $driver;
 	/**
@@ -43,9 +43,10 @@ class QueryBuilder extends \yii\base\Object
 	 */
 	public $separator = " ";
 	/**
-	 * @var Query the Query object. This is set when calling [[build()]] to generate a non-SELECT SQL statement.
+	 * @var Query the Query object that is currently processed by the query builder to generate a SQL statement.
+	 * After the SQL statement is generated by [[build()]], this property will be set null.
 	 */
-	private $_query;
+	public $query;
 
 	/**
 	 * Constructor.
@@ -66,33 +67,43 @@ class QueryBuilder extends \yii\base\Object
 	 */
 	public function build($query)
 	{
+		$this->query = $query;
 		if ($query->operation !== null) {
 			// non-SELECT query
-			$this->_query = $query;
 			$method = array_shift($query->operation);
 			$sql = call_user_func_array(array($this, $method), $query->operation);
-			$this->_query = null;
-			return $sql;
 		} else {
 			// SELECT query
 			$clauses = array(
-				$this->buildSelect($query),
-				$this->buildFrom($query),
-				$this->buildJoin($query),
-				$this->buildWhere($query),
-				$this->buildGroupBy($query),
-				$this->buildHaving($query),
-				$this->buildUnion($query),
-				$this->buildOrderBy($query),
-				$this->buildLimit($query),
+				$this->buildSelect(),
+				$this->buildFrom(),
+				$this->buildJoin(),
+				$this->buildWhere(),
+				$this->buildGroupBy(),
+				$this->buildHaving(),
+				$this->buildUnion(),
+				$this->buildOrderBy(),
+				$this->buildLimit(),
 			);
-			return implode($this->separator, array_filter($clauses));
+			$sql = implode($this->separator, array_filter($clauses));
 		}
+		$this->query = null;
+		return $sql;
 	}
 
 	/**
 	 * Creates and executes an INSERT SQL statement.
 	 * The method will properly escape the column names, and bind the values to be inserted.
+	 * For example,
+	 *
+	 * ~~~
+	 * $params = array();
+	 * $sql = $queryBuilder->insert('tbl_user', array(
+	 *     'name' => 'Sam',
+	 *     'age' => 30,
+	 * ), $params);
+	 * ~~~
+	 *
 	 * @param string $table the table that new rows will be inserted into.
 	 * @param array $columns the column data (name=>value) to be inserted into the table.
 	 * @param array $params the parameters to be bound to the query. This method will modify
@@ -117,8 +128,8 @@ class QueryBuilder extends \yii\base\Object
 				$count++;
 			}
 		}
-		if ($this->_query instanceof Query) {
-			$this->_query->addParams($params);
+		if ($this->query instanceof Query) {
+			$this->query->addParams($params);
 		}
 
 		return 'INSERT INTO ' . $this->driver->quoteTableName($table)
@@ -129,6 +140,15 @@ class QueryBuilder extends \yii\base\Object
 	/**
 	 * Creates and executes an UPDATE SQL statement.
 	 * The method will properly escape the column names and bind the values to be updated.
+	 * For example,
+	 *
+	 * ~~~
+	 * $params = array();
+	 * $sql = $queryBuilder->update('tbl_user', array(
+	 *     'status' => 1,
+	 * ), 'age > 30', $params);
+	 * ~~~
+	 *
 	 * @param string $table the table to be updated.
 	 * @param array $columns the column data (name=>value) to be updated.
 	 * @param mixed $condition the condition that will be put in the WHERE part. Please
@@ -153,8 +173,8 @@ class QueryBuilder extends \yii\base\Object
 				$count++;
 			}
 		}
-		if ($this->_query instanceof Query) {
-			$this->_query->addParams($params);
+		if ($this->query instanceof Query) {
+			$this->query->addParams($params);
 		}
 		$sql = 'UPDATE ' . $this->driver->quoteTableName($table) . ' SET ' . implode(', ', $lines);
 		if (($where = $this->buildCondition($condition)) != '') {
@@ -166,6 +186,12 @@ class QueryBuilder extends \yii\base\Object
 
 	/**
 	 * Creates and executes a DELETE SQL statement.
+	 * For example,
+	 *
+	 * ~~~
+	 * $sql = $queryBuilder->delete('tbl_user', 'status = 0');
+	 * ~~~
+	 *
 	 * @param string $table the table where the data will be deleted from.
 	 * @param mixed $condition the condition that will be put in the WHERE part. Please
 	 * refer to [[Query::where()]] on how to specify condition.
@@ -191,6 +217,16 @@ class QueryBuilder extends \yii\base\Object
 	 * If a column is specified with definition only (e.g. 'PRIMARY KEY (name, type)'), it will be directly
 	 * inserted into the generated SQL.
 	 *
+	 * For example,
+	 *
+	 * ~~~
+	 * $sql = $queryBuilder->createTable('tbl_user', array(
+	 *     'id' => 'pk',
+	 *     'name' => 'string',
+	 *     'age' => 'integer',
+	 * ));
+	 * ~~~
+	 *
 	 * @param string $table the name of the table to be created. The name will be properly quoted by the method.
 	 * @param array $columns the columns (name=>definition) in the new table.
 	 * @param string $options additional SQL fragment that will be appended to the generated SQL.
@@ -201,7 +237,7 @@ class QueryBuilder extends \yii\base\Object
 		$cols = array();
 		foreach ($columns as $name => $type) {
 			if (is_string($name)) {
-				$cols[] = "\t" . $this->driver->quoteColumnName($name) . ' ' . $this->driver->getColumnType($type);
+				$cols[] = "\t" . $this->driver->quoteColumnName($name) . ' ' . $this->getColumnType($type);
 			} else
 			{
 				$cols[] = "\t" . $type;
@@ -213,13 +249,13 @@ class QueryBuilder extends \yii\base\Object
 
 	/**
 	 * Builds a SQL statement for renaming a DB table.
-	 * @param string $table the table to be renamed. The name will be properly quoted by the method.
+	 * @param string $oldName the table to be renamed. The name will be properly quoted by the method.
 	 * @param string $newName the new table name. The name will be properly quoted by the method.
 	 * @return string the SQL statement for renaming a DB table.
 	 */
-	public function renameTable($table, $newName)
+	public function renameTable($oldName, $newName)
 	{
-		return 'RENAME TABLE ' . $this->driver->quoteTableName($table) . ' TO ' . $this->driver->quoteTableName($newName);
+		return 'RENAME TABLE ' . $this->driver->quoteTableName($oldName) . ' TO ' . $this->driver->quoteTableName($newName);
 	}
 
 	/**
@@ -288,9 +324,10 @@ class QueryBuilder extends \yii\base\Object
 	 * Builds a SQL statement for changing the definition of a column.
 	 * @param string $table the table whose column is to be changed. The table name will be properly quoted by the method.
 	 * @param string $column the name of the column to be changed. The name will be properly quoted by the method.
-	 * @param string $type the new column type. The [[getColumnType]] method will be invoked to convert abstract column type (if any)
-	 * into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL.
-	 * For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
+	 * @param string $type the new column type. The [[getColumnType()]] method will be invoked to convert abstract
+	 * column type (if any) into the physical one. Anything that is not recognized as abstract type will be kept
+	 * in the generated SQL. For example, 'string' will be turned into 'varchar(255)', while 'string not null'
+	 * will become 'varchar(255) not null'.
 	 * @return string the SQL statement for changing the definition of a column.
 	 */
 	public function alterColumn($table, $column, $type)
@@ -306,20 +343,26 @@ class QueryBuilder extends \yii\base\Object
 	 * The method will properly quote the table and column names.
 	 * @param string $name the name of the foreign key constraint.
 	 * @param string $table the table that the foreign key constraint will be added to.
-	 * @param string $columns the name of the column to that the constraint will be added on. If there are multiple columns, separate them with commas.
+	 * @param string|array $columns the name of the column to that the constraint will be added on.
+	 * If there are multiple columns, separate them with commas or use an array to represent them.
 	 * @param string $refTable the table that the foreign key references to.
-	 * @param string $refColumns the name of the column that the foreign key references to. If there are multiple columns, separate them with commas.
+	 * @param string|array $refColumns the name of the column that the foreign key references to.
+	 * If there are multiple columns, separate them with commas or use an array to represent them.
 	 * @param string $delete the ON DELETE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
 	 * @param string $update the ON UPDATE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
 	 * @return string the SQL statement for adding a foreign key constraint to an existing table.
 	 */
 	public function addForeignKey($name, $table, $columns, $refTable, $refColumns, $delete = null, $update = null)
 	{
+		if (!is_array($columns)) {
 			$columns = preg_split('/\s*,\s*/', $columns, -1, PREG_SPLIT_NO_EMPTY);
+		}
 		foreach ($columns as $i => $col) {
 			$columns[$i] = $this->driver->quoteColumnName($col);
 		}
+		if (!is_array($refColumns)) {
 			$refColumns = preg_split('/\s*,\s*/', $refColumns, -1, PREG_SPLIT_NO_EMPTY);
+		}
 		foreach ($refColumns as $i => $col) {
 			$refColumns[$i] = $this->driver->quoteColumnName($col);
 		}
@@ -353,27 +396,27 @@ class QueryBuilder extends \yii\base\Object
 	 * Builds a SQL statement for creating a new index.
 	 * @param string $name the name of the index. The name will be properly quoted by the method.
 	 * @param string $table the table that the new index will be created for. The table name will be properly quoted by the method.
-	 * @param string $column the column(s) that should be included in the index. If there are multiple columns, please separate them
-	 * by commas. Each column name will be properly quoted by the method, unless a parenthesis is found in the name.
+	 * @param string|array $columns the column(s) that should be included in the index. If there are multiple columns,
+	 * separate them with commas or use an array to represent them. Each column name will be properly quoted
+	 * by the method, unless a parenthesis is found in the name.
 	 * @param boolean $unique whether to add UNIQUE constraint on the created index.
 	 * @return string the SQL statement for creating a new index.
 	 */
-	public function createIndex($name, $table, $column, $unique = false)
-	{
-		$cols = array();
-		$columns = preg_split('/\s*,\s*/', $column, -1, PREG_SPLIT_NO_EMPTY);
-		foreach ($columns as $col)
+	public function createIndex($name, $table, $columns, $unique = false)
 	{
-			if (strpos($col, '(') !== false) {
-				$cols[] = $col;
-			} else
-			{
-				$cols[] = $this->driver->quoteColumnName($col);
+		if (!is_array($columns)) {
+			$columns = preg_split('/\s*,\s*/', $columns, -1, PREG_SPLIT_NO_EMPTY);
+		}
+		foreach ($columns as $i => $column) {
+			if (strpos($column, '(') !== false) {
+				$columns[$i] = $column;
+			} else {
+				$columns[$i] = $this->driver->quoteColumnName($column);
 			}
 		}
 		return ($unique ? 'CREATE UNIQUE INDEX ' : 'CREATE INDEX ')
 			. $this->driver->quoteTableName($name) . ' ON '
-			. $this->driver->quoteTableName($table) . ' (' . implode(', ', $cols) . ')';
+			. $this->driver->quoteTableName($table) . ' (' . implode(', ', $columns) . ')';
 	}
 
 	/**
@@ -391,7 +434,7 @@ class QueryBuilder extends \yii\base\Object
 	 * Resets 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 CDbTableSchema $table the table schema whose primary key sequence will be reset
+	 * @param string $table the table schema 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.
 	 */
@@ -411,26 +454,30 @@ class QueryBuilder extends \yii\base\Object
 	/**
 	 * Converts an abstract column type into a physical column type.
 	 * The conversion is done using the type map specified in [[typeMap]].
-	 * These abstract column types are supported (using MySQL as example to explain the corresponding
+	 * The following abstract column types are supported (using MySQL as an example to explain the corresponding
 	 * physical types):
-	 * <ul>
-	 * <li>pk: an auto-incremental primary key type, will be converted into "int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY"</li>
-	 * <li>string: string type, will be converted into "varchar(255)"</li>
-	 * <li>text: a long string type, will be converted into "text"</li>
-	 * <li>integer: integer type, will be converted into "int(11)"</li>
-	 * <li>boolean: boolean type, will be converted into "tinyint(1)"</li>
-	 * <li>float: float number type, will be converted into "float"</li>
-	 * <li>decimal: decimal number type, will be converted into "decimal"</li>
-	 * <li>datetime: datetime type, will be converted into "datetime"</li>
-	 * <li>timestamp: timestamp type, will be converted into "timestamp"</li>
-	 * <li>time: time type, will be converted into "time"</li>
-	 * <li>date: date type, will be converted into "date"</li>
-	 * <li>binary: binary data type, will be converted into "blob"</li>
-	 * </ul>
+	 * 
+	 * - `pk`: an auto-incremental primary key type, will be converted into "int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY"
+	 * - `string`: string type, will be converted into "varchar(255)"
+	 * - `text`: a long string type, will be converted into "text"
+	 * - `smallint`: a small integer type, will be converted into "smallint(6)"
+	 * - `integer`: integer type, will be converted into "int(11)"
+	 * - `bigint`: a big integer type, will be converted into "bigint(20)"
+	 * - `boolean`: boolean type, will be converted into "tinyint(1)"
+	 * - `float``: float number type, will be converted into "float"
+	 * - `decimal`: decimal number type, will be converted into "decimal"
+	 * - `datetime`: datetime type, will be converted into "datetime"
+	 * - `timestamp`: timestamp type, will be converted into "timestamp"
+	 * - `time`: time type, will be converted into "time"
+	 * - `date`: date type, will be converted into "date"
+	 * - `money`: money type, will be converted into "decimal(19,4)"
+	 * - `binary`: binary data type, will be converted into "blob"
 	 *
 	 * If the abstract type contains two or more parts separated by spaces (e.g. "string NOT NULL"), then only
-	 * the first part will be converted, and the rest of the parts will be appended to the conversion result.
+	 * the first part will be converted, and the rest of the parts will be appended to the converted result.
 	 * For example, 'string NOT NULL' is converted to 'varchar(255) NOT NULL'.
+	 *
+	 * If a type cannot be found in [[typeMap]], it will be returned without any change.
 	 * @param string $type abstract column type
 	 * @return string physical column type.
 	 */
@@ -438,22 +485,109 @@ class QueryBuilder extends \yii\base\Object
 	{
 		if (isset($this->typeMap[$type])) {
 			return $this->typeMap[$type];
-		} elseif (($pos = strpos($type, ' ')) !== false) {
-			$t = substr($type, 0, $pos);
-			return (isset($this->typeMap[$t]) ? $this->typeMap[$t] : $t) . substr($type, $pos);
-		} else {
+		} elseif (preg_match('/^(\w+)\s+/', $type, $matches)) {
+			if (isset($this->typeMap[$matches[0]])) {
+				return preg_replace('/^\w+/', $this->typeMap[$matches[0]], $type);
+			}
+		}
 		return $type;
 	}
+
+	/**
+	 * Generates a SQL condition from the given PHP representation.
+	 * @param string|array $condition the PHP representation of the SQL condition
+	 * @return string the generated SQL condition.
+	 */
+	public function buildCondition($condition)
+	{
+		if (!is_array($condition)) {
+			return $condition;
+		} elseif ($condition === array()) {
+			return '';
+		}
+
+		$n = count($condition);
+		$operator = strtoupper($condition[0]);
+		if ($operator === 'OR' || $operator === 'AND') {
+			$parts = array();
+			for ($i = 1; $i < $n; ++$i) {
+				$part = $this->buildCondition($condition[$i]);
+				if ($part !== '') {
+					$parts[] = '(' . $part . ')';
+				}
+			}
+			return $parts === array() ? '' : implode(' ' . $operator . ' ', $parts);
+		}
+
+		if (!isset($condition[1], $condition[2])) {
+			throw new Exception("Operator $operator requires at least two operands.");
+		}
+
+		$column = $condition[1];
+		if (strpos($column, '(') === false) {
+			$column = $this->connection->quoteColumnName($column);
+		}
+
+		if ($operator === 'BETWEEN' || $operator === 'NOT BETWEEN') {
+			if (!isset($condition[3])) {
+				throw new Exception("Operator $operator requires three operands.");
+			}
+			$value1 = is_string($condition[2]) ? $this->connection->quoteValue($condition[2]) : (string)$condition[2];
+			$value2 = is_string($condition[3]) ? $this->connection->quoteValue($condition[3]) : (string)$condition[3];
+			return "$column $operator $value1 AND $value2";
+		}
+
+		$values = $condition[2];
+		if (!is_array($values)) {
+			$values = array($values);
+		}
+
+		if ($operator === 'IN' || $operator === 'NOT IN') {
+			if ($values === array()) {
+				return $operator === 'IN' ? '0=1' : '';
+			}
+			foreach ($values as $i => $value) {
+				if (is_string($value)) {
+					$values[$i] = $this->connection->quoteValue($value);
+				} else {
+					$values[$i] = (string)$value;
+				}
+			}
+			return $column . ' ' . $operator . ' (' . implode(', ', $values) . ')';
+		}
+
+		if ($operator === 'LIKE' || $operator === 'NOT LIKE' || $operator === 'OR LIKE' || $operator === 'OR NOT LIKE') {
+			if ($values === array()) {
+				return $operator === 'LIKE' || $operator === 'OR LIKE' ? '0=1' : '';
+			}
+
+			if ($operator === 'LIKE' || $operator === 'NOT LIKE') {
+				$andor = ' AND ';
+			} else {
+				$andor = ' OR ';
+				$operator = $operator === 'OR LIKE' ? 'LIKE' : 'NOT LIKE';
+			}
+			$expressions = array();
+			foreach ($values as $value) {
+				$expressions[] = $column . ' ' . $operator . ' ' . $this->connection->quoteValue($value);
+			}
+			return implode($andor, $expressions);
 		}
 
-	protected function buildSelect($query)
+		throw new Exception('Unknown operator: ' . $operator);
+	}
+
+	/**
+	 * @return string the SELECT clause built from [[query]].
+	 */
+	protected function buildSelect()
 	{
-		$select = $query->distinct ? 'SELECT DISTINCT' : 'SELECT';
-		if ($query->selectOption != '') {
-			$select .= ' ' . $query->selectOption;
+		$select = $this->query->distinct ? 'SELECT DISTINCT' : 'SELECT';
+		if ($this->query->selectOption != '') {
+			$select .= ' ' . $this->query->selectOption;
 		}
 
-		$columns = $query->select;
+		$columns = $this->query->select;
 		if (empty($columns)) {
 			return $select . ' *';
 		}
@@ -480,13 +614,16 @@ class QueryBuilder extends \yii\base\Object
 		return $select . ' ' . implode(', ', $columns);
 	}
 
-	protected function buildFrom($query)
+	/**
+	 * @return string the FROM clause built from [[query]].
+	 */
+	protected function buildFrom()
 	{
-		if (empty($query->from)) {
+		if (empty($this->query->from)) {
 			return '';
 		}
 
-		$tables = $query->from;
+		$tables = $this->query->from;
 		if (is_string($tables) && strpos($tables, '(') !== false) {
 			return 'FROM ' . $tables;
 		}
@@ -507,9 +644,12 @@ class QueryBuilder extends \yii\base\Object
 		return 'FROM ' . implode(', ', $tables);
 	}
 
-	protected function buildJoin($query)
+	/**
+	 * @return string the JOIN clause built from [[query]].
+	 */
+	protected function buildJoin()
 	{
-		$joins = $query->join;
+		$joins = $this->query->join;
 		if (empty($joins)) {
 			return '';
 		}
@@ -533,7 +673,7 @@ class QueryBuilder extends \yii\base\Object
 						$joins[$i] .= ' ON ' . $this->buildCondition($join[2]);
 					}
 				} else {
-					throw new Exception('The join clause may be specified as an array of at least two elements.');
+					throw new Exception('A join clause must be specified as an array of at least two elements.');
 				}
 			}
 		}
@@ -541,15 +681,21 @@ class QueryBuilder extends \yii\base\Object
 		return implode("\n", $joins);
 	}
 
-	protected function buildWhere($query)
+	/**
+	 * @return string the WHERE clause built from [[query]].
+	 */
+	protected function buildWhere()
 	{
-		$where = $this->buildCondition($query->where);
+		$where = $this->buildCondition($this->query->where);
 		return empty($where) ? '' : 'WHERE ' . $where;
 	}
 
-	protected function buildGroupBy($query)
+	/**
+	 * @return string the GROUP BY clause built from [[query]].
+	 */
+	protected function buildGroupBy()
 	{
-		$columns = $query->groupBy;
+		$columns = $this->query->groupBy;
 		if (empty($columns)) {
 			return '';
 		}
@@ -570,15 +716,21 @@ class QueryBuilder extends \yii\base\Object
 		return 'GROUP BY ' . implode(', ', $columns);
 	}
 
-	protected function buildHaving($query)
+	/**
+	 * @return string the HAVING clause built from [[query]].
+	 */
+	protected function buildHaving()
 	{
-		$having = $this->buildCondition($query->having);
+		$having = $this->buildCondition($this->query->having);
 		return empty($having) ? '' : 'HAVING ' . $having;
 	}
 
-	protected function buildOrderBy($query)
+	/**
+	 * @return string the ORDER BY clause built from [[query]].
+	 */
+	protected function buildOrderBy()
 	{
-		$columns = $query->orderBy;
+		$columns = $this->query->orderBy;
 		if (empty($columns)) {
 			return '';
 		}
@@ -603,21 +755,27 @@ class QueryBuilder extends \yii\base\Object
 		return 'ORDER BY ' . implode(', ', $columns);
 	}
 
-	protected function buildLimit($query)
+	/**
+	 * @return string the LIMIT and OFFSET clauses built from [[query]].
+	 */
+	protected function buildLimit()
 	{
 		$sql = '';
-		if ($query->limit !== null && $query->limit >= 0) {
-			$sql = 'LIMIT ' . (int)$query->limit;
+		if ($this->query->limit !== null && $this->query->limit >= 0) {
+			$sql = 'LIMIT ' . (int)$this->query->limit;
 		}
-		if ($query->offset > 0) {
-			$sql .= ' OFFSET ' . (int)$query->offset;
+		if ($this->query->offset > 0) {
+			$sql .= ' OFFSET ' . (int)$this->query->offset;
 		}
 		return ltrim($sql);
 	}
 
-	protected function buildUnion($query)
+	/**
+	 * @return string the UNION clause built from [[query]].
+	 */
+	protected function buildUnion()
 	{
-		$unions = $query->union;
+		$unions = $this->query->union;
 		if (empty($unions)) {
 			return '';
 		}
@@ -631,83 +789,4 @@ class QueryBuilder extends \yii\base\Object
 		}
 		return "UNION (\n" . implode("\n) UNION (\n", $unions) . "\n)";
 	}
-
-	protected function buildCondition($condition)
-	{
-		if (!is_array($condition)) {
-			return $condition;
-		} elseif ($condition === array()) {
-			return '';
-		}
-
-		$n = count($condition);
-		$operator = strtoupper($condition[0]);
-		if ($operator === 'OR' || $operator === 'AND') {
-			$parts = array();
-			for ($i = 1; $i < $n; ++$i) {
-				$part = $this->buildCondition($condition[$i]);
-				if ($part !== '') {
-					$parts[] = '(' . $part . ')';
-				}
-			}
-			return $parts === array() ? '' : implode(' ' . $operator . ' ', $parts);
-		}
-
-		if (!isset($condition[1], $condition[2])) {
-			throw new Exception("Operator $operator requires at least two operands.");
-		}
-
-		$column = $condition[1];
-		if (strpos($column, '(') === false) {
-			$column = $this->connection->quoteColumnName($column);
-		}
-
-		if ($operator === 'BETWEEN' || $operator === 'NOT BETWEEN') {
-			if (!isset($condition[3])) {
-				throw new Exception("Operator $operator requires three operands.");
-			}
-			$value1 = is_string($condition[2]) ? $this->connection->quoteValue($condition[2]) : (string)$condition[2];
-			$value2 = is_string($condition[3]) ? $this->connection->quoteValue($condition[3]) : (string)$condition[3];
-			return "$column $operator $value1 AND $value2";
-		}
-
-		$values = $condition[2];
-		if (!is_array($values)) {
-			$values = array($values);
-		}
-
-		if ($operator === 'IN' || $operator === 'NOT IN') {
-			if ($values === array()) {
-				return $operator === 'IN' ? '0=1' : '';
-			}
-			foreach ($values as $i => $value) {
-				if (is_string($value)) {
-					$values[$i] = $this->connection->quoteValue($value);
-				} else {
-					$values[$i] = (string)$value;
-				}
-			}
-			return $column . ' ' . $operator . ' (' . implode(', ', $values) . ')';
-		}
-
-		if ($operator === 'LIKE' || $operator === 'NOT LIKE' || $operator === 'OR LIKE' || $operator === 'OR NOT LIKE') {
-			if ($values === array()) {
-				return $operator === 'LIKE' || $operator === 'OR LIKE' ? '0=1' : '';
-			}
-
-			if ($operator === 'LIKE' || $operator === 'NOT LIKE') {
-				$andor = ' AND ';
-			} else {
-				$andor = ' OR ';
-				$operator = $operator === 'OR LIKE' ? 'LIKE' : 'NOT LIKE';
-			}
-			$expressions = array();
-			foreach ($values as $value) {
-				$expressions[] = $column . ' ' . $operator . ' ' . $this->connection->quoteValue($value);
-			}
-			return implode($andor, $expressions);
-		}
-
-		throw new Exception('Unknown operator: ' . $operator);
-	}
 }