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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\mssql;
use yii\base\InvalidParamException;
/**
* QueryBuilder is the query builder for MS SQL Server databases (version 2008 and above).
*
* @author Timur Ruziev <resurtm@gmail.com>
* @since 2.0
*/
class QueryBuilder extends \yii\db\QueryBuilder
{
/**
* @var array mapping from abstract column types (keys) to physical column types (values).
*/
public $typeMap = [
Schema::TYPE_PK => 'int IDENTITY PRIMARY KEY',
Schema::TYPE_BIGPK => 'bigint IDENTITY PRIMARY KEY',
Schema::TYPE_STRING => 'varchar(255)',
Schema::TYPE_TEXT => 'text',
Schema::TYPE_SMALLINT => 'smallint',
Schema::TYPE_INTEGER => 'int',
Schema::TYPE_BIGINT => 'bigint',
Schema::TYPE_FLOAT => 'float',
Schema::TYPE_DECIMAL => 'decimal',
Schema::TYPE_DATETIME => 'datetime',
Schema::TYPE_TIMESTAMP => 'timestamp',
Schema::TYPE_TIME => 'time',
Schema::TYPE_DATE => 'date',
Schema::TYPE_BINARY => 'binary',
Schema::TYPE_BOOLEAN => 'bit',
Schema::TYPE_MONEY => 'decimal(19,4)',
];
// public function update($table, $columns, $condition, &$params)
// {
// return '';
// }
// public function delete($table, $condition, &$params)
// {
// return '';
// }
/**
* @param integer $limit
* @param integer $offset
* @return string the LIMIT and OFFSET clauses built from [[query]].
*/
public function buildLimit($limit, $offset = 0)
{
$sql = '';
if ($offset !== null && $offset >= 0) {
$sql = 'OFFSET ' . (int)$offset . ' ROWS';
if ($limit !== null && $limit >= 0) {
$sql .= ' FETCH NEXT ' . (int)$limit . ' ROWS ONLY';
}
}
return $sql;
}
// public function resetSequence($table, $value = null)
// {
// return '';
// }
/**
* 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 $newName the new table name. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB table.
*/
public function renameTable($table, $newName)
{
return "sp_rename '$table', '$newName'";
}
/**
* 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 $name the old name of the column. The name will be properly quoted by the method.
* @param string $newName the new name of the column. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB column.
*/
public function renameColumn($table, $name, $newName)
{
return "sp_rename '$table.$name', '$newName', 'COLUMN'";
}
/**
* 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 $type the new column type. The {@link getColumnType} method will be invoked to convert abstract column type (if any)
* into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL.
* For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
* @return string the SQL statement for changing the definition of a column.
*/
public function alterColumn($table, $column, $type)
{
$type = $this->getColumnType($type);
$sql = 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' ALTER COLUMN '
. $this->db->quoteColumnName($column) . ' '
. $this->getColumnType($type);
return $sql;
}
/**
* Builds a SQL statement for enabling or disabling integrity check.
* @param boolean $check whether to turn on or off the integrity check.
* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
* @param string $table the table name. Defaults to empty string, meaning that no table will be changed.
* @return string the SQL statement for checking integrity
* @throws InvalidParamException if the table does not exist or there is no sequence associated with the table.
*/
public function checkIntegrity($check = true, $schema = '', $table = '')
{
if ($schema !== '') {
$table = "{$schema}.{$table}";
}
$table = $this->db->quoteTableName($table);
if ($this->db->getTableSchema($table) === null) {
throw new InvalidParamException("Table not found: $table");
}
$enable = $check ? 'CHECK' : 'NOCHECK';
return "ALTER TABLE {$table} {$enable} CONSTRAINT ALL";
}
}