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269 lines
10 KiB
PHP
269 lines
10 KiB
PHP
<?php
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/**
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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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namespace yii\db\mssql;
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use yii\base\InvalidParamException;
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/**
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* QueryBuilder is the query builder for MS SQL Server databases (version 2008 and above).
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*
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* @author Timur Ruziev <resurtm@gmail.com>
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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 $typeMap = [
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Schema::TYPE_PK => 'int IDENTITY PRIMARY KEY',
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Schema::TYPE_BIGPK => 'bigint IDENTITY PRIMARY KEY',
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Schema::TYPE_STRING => 'varchar(255)',
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Schema::TYPE_TEXT => 'text',
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Schema::TYPE_SMALLINT => 'smallint',
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Schema::TYPE_INTEGER => 'int',
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Schema::TYPE_BIGINT => 'bigint',
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Schema::TYPE_FLOAT => 'float',
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Schema::TYPE_DECIMAL => 'decimal',
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Schema::TYPE_DATETIME => 'datetime',
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Schema::TYPE_TIMESTAMP => 'timestamp',
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Schema::TYPE_TIME => 'time',
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Schema::TYPE_DATE => 'date',
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Schema::TYPE_BINARY => 'binary(1)',
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Schema::TYPE_BOOLEAN => 'bit',
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Schema::TYPE_MONEY => 'decimal(19,4)',
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];
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/**
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* @inheritdoc
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*/
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public function buildOrderByAndLimit($sql, $orderBy, $limit, $offset)
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{
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if (!$this->hasOffset($offset) && !$this->hasLimit($limit)) {
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$orderBy = $this->buildOrderBy($orderBy);
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return $orderBy === '' ? $sql : $sql . $this->separator . $orderBy;
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}
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if ($this->isOldMssql()) {
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return $this->oldbuildOrderByAndLimit($sql, $orderBy, $limit, $offset);
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} else {
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return $this->newBuildOrderByAndLimit($sql, $orderBy, $limit, $offset);
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}
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}
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/**
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* Builds the ORDER BY/LIMIT/OFFSET clauses for SQL SERVER 2012 or newer.
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* @param string $sql the existing SQL (without ORDER BY/LIMIT/OFFSET)
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* @param array $orderBy the order by columns. See [[Query::orderBy]] for more details on how to specify this parameter.
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* @param integer $limit the limit number. See [[Query::limit]] for more details.
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* @param integer $offset the offset number. See [[Query::offset]] for more details.
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* @return string the SQL completed with ORDER BY/LIMIT/OFFSET (if any)
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*/
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protected function newBuildOrderByAndLimit($sql, $orderBy, $limit, $offset)
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{
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$orderBy = $this->buildOrderBy($orderBy);
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if ($orderBy === '') {
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// ORDER BY clause is required when FETCH and OFFSET are in the SQL
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$orderBy = 'ORDER BY (SELECT NULL)';
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}
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$sql .= $this->separator . $orderBy;
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// http://technet.microsoft.com/en-us/library/gg699618.aspx
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$offset = $this->hasOffset($offset) ? $offset : '0';
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$sql .= $this->separator . "OFFSET $offset ROWS";
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if ($this->hasLimit($limit)) {
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$sql .= $this->separator . "FETCH NEXT $limit ROWS ONLY";
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}
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return $sql;
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}
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/**
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* Builds the ORDER BY/LIMIT/OFFSET clauses for SQL SERVER 2005 to 2008.
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* @param string $sql the existing SQL (without ORDER BY/LIMIT/OFFSET)
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* @param array $orderBy the order by columns. See [[Query::orderBy]] for more details on how to specify this parameter.
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* @param integer $limit the limit number. See [[Query::limit]] for more details.
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* @param integer $offset the offset number. See [[Query::offset]] for more details.
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* @return string the SQL completed with ORDER BY/LIMIT/OFFSET (if any)
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*/
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protected function oldBuildOrderByAndLimit($sql, $orderBy, $limit, $offset)
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{
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$orderBy = $this->buildOrderBy($orderBy);
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if ($orderBy === '') {
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// ROW_NUMBER() requires an ORDER BY clause
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$orderBy = 'ORDER BY (SELECT NULL)';
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}
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$sql = preg_replace('/^([\s(])*SELECT(\s+DISTINCT)?(?!\s*TOP\s*\()/i', "\\1SELECT\\2 rowNum = ROW_NUMBER() over ($orderBy),", $sql);
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if ($this->hasLimit($limit)) {
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$sql = "SELECT TOP $limit * FROM ($sql) sub";
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} else {
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$sql = "SELECT * FROM ($sql) sub";
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}
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if ($this->hasOffset($offset)) {
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$sql .= $this->separator . "WHERE rowNum > $offset";
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}
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return $sql;
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}
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/**
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* Builds a SQL statement for renaming a DB table.
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* @param string $table the table to be renamed. The name will be properly quoted by the method.
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* @param string $newName the new table name. The name will be properly quoted by the method.
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* @return string the SQL statement for renaming a DB table.
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*/
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public function renameTable($table, $newName)
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{
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return "sp_rename '$table', '$newName'";
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}
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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 $name the old name of the column. The name will be properly quoted by the method.
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* @param string $newName the new name of the column. The name will be properly quoted by the method.
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* @return string the SQL statement for renaming a DB column.
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*/
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public function renameColumn($table, $name, $newName)
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{
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return "sp_rename '$table.$name', '$newName', 'COLUMN'";
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}
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/**
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* Builds a SQL statement for changing the definition of a column.
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* @param string $table the table whose column is to be changed. The table name will be properly quoted by the method.
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* @param string $column the name of the column to be changed. The name will be properly quoted by the method.
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* @param string $type the new column type. The [[getColumnType]] method will be invoked to convert abstract column type (if any)
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* into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL.
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* For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
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* @return string the SQL statement for changing the definition of a column.
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*/
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public function alterColumn($table, $column, $type)
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{
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$type = $this->getColumnType($type);
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$sql = 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' ALTER COLUMN '
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. $this->db->quoteColumnName($column) . ' '
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. $this->getColumnType($type);
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return $sql;
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}
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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. Defaults to empty string, meaning the current or default schema.
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* @param string $table the table name. Defaults to empty string, meaning that no table will be changed.
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* @return string the SQL statement for checking integrity
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* @throws InvalidParamException if the table does not exist or there is no sequence associated with the table.
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*/
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public function checkIntegrity($check = true, $schema = '', $table = '')
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{
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if ($schema !== '') {
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$table = "{$schema}.{$table}";
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}
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$table = $this->db->quoteTableName($table);
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if ($this->db->getTableSchema($table) === null) {
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throw new InvalidParamException("Table not found: $table");
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}
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$enable = $check ? 'CHECK' : 'NOCHECK';
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return "ALTER TABLE {$table} {$enable} CONSTRAINT ALL";
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}
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/**
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* Returns an array of column names given model name
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*
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* @param string $modelClass name of the model class
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* @return array|null array of column names
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*/
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protected function getAllColumnNames($modelClass = null)
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{
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if (!$modelClass) {
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return null;
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}
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/* @var $model \yii\db\ActiveRecord */
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$model = new $modelClass;
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$schema = $model->getTableSchema();
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$columns = array_keys($schema->columns);
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return $columns;
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}
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/**
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* @var boolean whether MSSQL used is old.
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*/
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private $_oldMssql;
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/**
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* @return boolean whether the version of the MSSQL being used is older than 2012.
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* @throws \yii\base\InvalidConfigException
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* @throws \yii\db\Exception
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*/
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protected function isOldMssql()
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{
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if ($this->_oldMssql === null) {
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$pdo = $this->db->getSlavePdo();
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$version = preg_split("/\./", $pdo->getAttribute(\PDO::ATTR_SERVER_VERSION));
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$this->_oldMssql = $version[0] < 11;
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}
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return $this->_oldMssql;
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}
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/**
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* Builds SQL for IN condition
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*
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* @param string $operator
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* @param array $columns
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* @param array $values
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* @param array $params
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* @return string SQL
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*/
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protected function buildSubqueryInCondition($operator, $columns, $values, &$params)
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{
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if (is_array($columns)) {
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throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
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}
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return parent::buildSubqueryInCondition($operator, $columns, $values, $params);
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}
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/**
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* Builds SQL for IN condition
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*
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* @param string $operator
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* @param array $columns
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* @param array $values
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* @param array $params
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* @return string SQL
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*/
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protected function buildCompositeInCondition($operator, $columns, $values, &$params)
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{
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$quotedColumns = [];
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foreach ($columns as $i => $column) {
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$quotedColumns[$i] = strpos($column, '(') === false ? $this->db->quoteColumnName($column) : $column;
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}
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$vss = [];
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foreach ($values as $value) {
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$vs = [];
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foreach ($columns as $i => $column) {
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if (isset($value[$column])) {
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$phName = self::PARAM_PREFIX . count($params);
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$params[$phName] = $value[$column];
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$vs[] = $quotedColumns[$i] . ($operator === 'IN' ? ' = ' : ' != ') . $phName;
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} else {
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$vs[] = $quotedColumns[$i] . ($operator === 'IN' ? ' IS' : ' IS NOT') . ' NULL';
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}
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}
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$vss[] = '(' . implode($operator === 'IN' ? ' AND ' : ' OR ', $vs) . ')';
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}
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return '(' . implode($operator === 'IN' ? ' OR ' : ' AND ', $vss) . ')';
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}
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}
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