mirror of
https://github.com/yiisoft/yii2.git
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679 lines
28 KiB
PHP
679 lines
28 KiB
PHP
<?php
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/**
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* @link https://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license https://www.yiiframework.com/license/
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*/
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namespace yii\db\mssql;
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use yii\base\InvalidArgumentException;
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use yii\base\NotSupportedException;
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use yii\db\Constraint;
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use yii\db\Expression;
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use yii\db\TableSchema;
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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_UPK => 'int IDENTITY PRIMARY KEY',
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Schema::TYPE_BIGPK => 'bigint IDENTITY PRIMARY KEY',
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Schema::TYPE_UBIGPK => 'bigint IDENTITY PRIMARY KEY',
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Schema::TYPE_CHAR => 'nchar(1)',
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Schema::TYPE_STRING => 'nvarchar(255)',
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Schema::TYPE_TEXT => 'nvarchar(max)',
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Schema::TYPE_TINYINT => 'tinyint',
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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_DOUBLE => 'float',
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Schema::TYPE_DECIMAL => 'decimal(18,0)',
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Schema::TYPE_DATETIME => 'datetime',
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Schema::TYPE_TIMESTAMP => 'datetime',
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Schema::TYPE_TIME => 'time',
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Schema::TYPE_DATE => 'date',
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Schema::TYPE_BINARY => 'varbinary(max)',
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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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protected function defaultExpressionBuilders()
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{
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return array_merge(parent::defaultExpressionBuilders(), [
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'yii\db\conditions\InCondition' => 'yii\db\mssql\conditions\InConditionBuilder',
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'yii\db\conditions\LikeCondition' => 'yii\db\mssql\conditions\LikeConditionBuilder',
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]);
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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 . $orderBy;
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}
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if (version_compare($this->db->getSchema()->getServerVersion(), '11', '<')) {
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return $this->oldBuildOrderByAndLimit($sql, $orderBy, $limit, $offset);
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}
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return $this->newBuildOrderByAndLimit($sql, $orderBy, $limit, $offset);
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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 [[\yii\db\Query::orderBy]] for more details on how to specify this parameter.
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* @param int $limit the limit number. See [[\yii\db\Query::limit]] for more details.
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* @param int $offset the offset number. See [[\yii\db\Query::offset]] for more details.
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* @return string the SQL completed with ORDER BY/LIMIT/OFFSET (if any)
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*/
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protected function newBuildOrderByAndLimit($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 [[\yii\db\Query::orderBy]] for more details on how to specify this parameter.
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* @param int|Expression $limit the limit number. See [[\yii\db\Query::limit]] for more details.
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* @param int $offset the offset number. See [[\yii\db\Query::offset]] for more details.
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* @return string the SQL completed with ORDER BY/LIMIT/OFFSET (if any)
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*/
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protected function oldBuildOrderByAndLimit($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($limit)) {
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if ($limit instanceof Expression) {
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$limit = '('. (string)$limit . ')';
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}
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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 $oldName the table to be renamed. The name will be properly quoted by the method.
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* @param string $newName the new table name. The name will be properly quoted by the method.
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* @return string the SQL statement for renaming a DB table.
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*/
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public function renameTable($oldName, $newName)
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{
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return 'sp_rename ' . $this->db->quoteTableName($oldName) . ', ' . $this->db->quoteTableName($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 $oldName the old name of the column. The name will be properly quoted by the method.
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* @param string $newName the new name of the column. The name will be properly quoted by the method.
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* @return string the SQL statement for renaming a DB column.
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*/
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public function renameColumn($table, $oldName, $newName)
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{
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$table = $this->db->quoteTableName($table);
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$oldName = $this->db->quoteColumnName($oldName);
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$newName = $this->db->quoteColumnName($newName);
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return "sp_rename '{$table}.{$oldName}', {$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 $type the new column type. The [[getColumnType]] method will be invoked to convert abstract column type (if any)
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* into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL.
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* For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
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* @return string the SQL statement for changing the definition of a column.
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* @throws NotSupportedException if this is not supported by the underlying DBMS.
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*/
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public function alterColumn($table, $column, $type)
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{
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$sqlAfter = [$this->dropConstraintsForColumn($table, $column, 'D')];
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$columnName = $this->db->quoteColumnName($column);
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$tableName = $this->db->quoteTableName($table);
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$constraintBase = preg_replace('/[^a-z0-9_]/i', '', $table . '_' . $column);
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if ($type instanceof \yii\db\mssql\ColumnSchemaBuilder) {
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$type->setAlterColumnFormat();
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$defaultValue = $type->getDefaultValue();
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if ($defaultValue !== null) {
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$sqlAfter[] = $this->addDefaultValue(
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"DF_{$constraintBase}",
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$table,
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$column,
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$defaultValue instanceof Expression ? $defaultValue : new Expression($defaultValue)
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);
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}
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$checkValue = $type->getCheckValue();
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if ($checkValue !== null) {
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$sqlAfter[] = "ALTER TABLE {$tableName} ADD CONSTRAINT " .
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$this->db->quoteColumnName("CK_{$constraintBase}") .
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" CHECK (" . ($defaultValue instanceof Expression ? $checkValue : new Expression($checkValue)) . ")";
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}
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if ($type->isUnique()) {
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$sqlAfter[] = "ALTER TABLE {$tableName} ADD CONSTRAINT " . $this->db->quoteColumnName("UQ_{$constraintBase}") . " UNIQUE ({$columnName})";
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}
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}
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return 'ALTER TABLE ' . $tableName . ' ALTER COLUMN '
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. $columnName . ' '
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. $this->getColumnType($type) . "\n"
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. implode("\n", $sqlAfter);
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}
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/**
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* {@inheritdoc}
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*/
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public function addDefaultValue($name, $table, $column, $value)
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{
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return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' ADD CONSTRAINT '
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. $this->db->quoteColumnName($name) . ' DEFAULT ' . $this->db->quoteValue($value) . ' FOR '
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. $this->db->quoteColumnName($column);
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}
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/**
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* {@inheritdoc}
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*/
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public function dropDefaultValue($name, $table)
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{
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return 'ALTER TABLE ' . $this->db->quoteTableName($table)
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. ' DROP CONSTRAINT ' . $this->db->quoteColumnName($name);
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}
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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 $value the value for the primary key of the next new row inserted. If this is not set,
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* the next new row's primary key will have a value 1.
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* @return string the SQL statement for resetting sequence
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* @throws InvalidArgumentException if the table does not exist or there is no sequence associated with the table.
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*/
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public function resetSequence($tableName, $value = null)
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{
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$table = $this->db->getTableSchema($tableName);
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if ($table !== null && $table->sequenceName !== null) {
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$tableName = $this->db->quoteTableName($tableName);
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if ($value === null) {
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$key = $this->db->quoteColumnName(reset($table->primaryKey));
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$value = "(SELECT COALESCE(MAX({$key}),0) FROM {$tableName})+1";
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} else {
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$value = (int) $value;
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}
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return "DBCC CHECKIDENT ('{$tableName}', RESEED, {$value})";
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} elseif ($table === null) {
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throw new InvalidArgumentException("Table not found: $tableName");
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}
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throw new InvalidArgumentException("There is not sequence associated with table '$tableName'.");
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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 bool $check whether to turn on or off the integrity check.
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* @param string $schema the schema of the tables.
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* @param string $table the table name.
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* @return string the SQL statement for checking integrity
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*/
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public function checkIntegrity($check = true, $schema = '', $table = '')
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{
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$enable = $check ? 'CHECK' : 'NOCHECK';
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$schema = $schema ?: $this->db->getSchema()->defaultSchema;
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$tableNames = $this->db->getTableSchema($table) ? [$table] : $this->db->getSchema()->getTableNames($schema);
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$viewNames = $this->db->getSchema()->getViewNames($schema);
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$tableNames = array_diff($tableNames, $viewNames);
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$command = '';
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foreach ($tableNames as $tableName) {
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$tableName = $this->db->quoteTableName("{$schema}.{$tableName}");
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$command .= "ALTER TABLE $tableName $enable CONSTRAINT ALL; ";
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}
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return $command;
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}
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/**
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* Builds a SQL command for adding or updating a comment to a table or a column. The command built will check if a comment
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* already exists. If so, it will be updated, otherwise, it will be added.
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*
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* @param string $comment the text of the comment to be added. The comment will be properly quoted by the method.
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* @param string $table the table to be commented or whose column is to be commented. The table name will be
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* properly quoted by the method.
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* @param string|null $column optional. The name of the column to be commented. If empty, the command will add the
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* comment to the table instead. The column name will be properly quoted by the method.
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* @return string the SQL statement for adding a comment.
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* @throws InvalidArgumentException if the table does not exist.
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* @since 2.0.24
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*/
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protected function buildAddCommentSql($comment, $table, $column = null)
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{
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$tableSchema = $this->db->schema->getTableSchema($table);
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if ($tableSchema === null) {
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throw new InvalidArgumentException("Table not found: $table");
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}
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$schemaName = $tableSchema->schemaName ? "N'" . $tableSchema->schemaName . "'": 'SCHEMA_NAME()';
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$tableName = "N" . $this->db->quoteValue($tableSchema->name);
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$columnName = $column ? "N" . $this->db->quoteValue($column) : null;
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$comment = "N" . $this->db->quoteValue($comment);
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$functionParams = "
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@name = N'MS_description',
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@value = $comment,
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@level0type = N'SCHEMA', @level0name = $schemaName,
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@level1type = N'TABLE', @level1name = $tableName"
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. ($column ? ", @level2type = N'COLUMN', @level2name = $columnName" : '') . ';';
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return "
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IF NOT EXISTS (
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SELECT 1
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FROM fn_listextendedproperty (
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N'MS_description',
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'SCHEMA', $schemaName,
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'TABLE', $tableName,
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" . ($column ? "'COLUMN', $columnName " : ' DEFAULT, DEFAULT ') . "
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)
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)
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EXEC sys.sp_addextendedproperty $functionParams
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ELSE
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EXEC sys.sp_updateextendedproperty $functionParams
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";
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}
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/**
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* {@inheritdoc}
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* @since 2.0.8
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*/
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public function addCommentOnColumn($table, $column, $comment)
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{
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return $this->buildAddCommentSql($comment, $table, $column);
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}
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/**
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* {@inheritdoc}
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* @since 2.0.8
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*/
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public function addCommentOnTable($table, $comment)
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{
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return $this->buildAddCommentSql($comment, $table);
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}
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/**
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* Builds a SQL command for removing a comment from a table or a column. The command built will check if a comment
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* already exists before trying to perform the removal.
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*
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* @param string $table the table that will have the comment removed or whose column will have the comment removed.
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* The table name will be properly quoted by the method.
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* @param string|null $column optional. The name of the column whose comment will be removed. If empty, the command
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* will remove the comment from the table instead. The column name will be properly quoted by the method.
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* @return string the SQL statement for removing the comment.
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* @throws InvalidArgumentException if the table does not exist.
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* @since 2.0.24
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*/
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protected function buildRemoveCommentSql($table, $column = null)
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{
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$tableSchema = $this->db->schema->getTableSchema($table);
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if ($tableSchema === null) {
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throw new InvalidArgumentException("Table not found: $table");
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}
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$schemaName = $tableSchema->schemaName ? "N'" . $tableSchema->schemaName . "'": 'SCHEMA_NAME()';
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$tableName = "N" . $this->db->quoteValue($tableSchema->name);
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$columnName = $column ? "N" . $this->db->quoteValue($column) : null;
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return "
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IF EXISTS (
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SELECT 1
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FROM fn_listextendedproperty (
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N'MS_description',
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'SCHEMA', $schemaName,
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'TABLE', $tableName,
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" . ($column ? "'COLUMN', $columnName " : ' DEFAULT, DEFAULT ') . "
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)
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)
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EXEC sys.sp_dropextendedproperty
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@name = N'MS_description',
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@level0type = N'SCHEMA', @level0name = $schemaName,
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@level1type = N'TABLE', @level1name = $tableName"
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. ($column ? ", @level2type = N'COLUMN', @level2name = $columnName" : '') . ';';
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}
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/**
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* {@inheritdoc}
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* @since 2.0.8
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*/
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public function dropCommentFromColumn($table, $column)
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{
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return $this->buildRemoveCommentSql($table, $column);
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}
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/**
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* {@inheritdoc}
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* @since 2.0.8
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*/
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public function dropCommentFromTable($table)
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{
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return $this->buildRemoveCommentSql($table);
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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|null $modelClass name of the model class
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* @return array|null array of column names
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*/
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protected function getAllColumnNames($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 $modelClass \yii\db\ActiveRecord */
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$schema = $modelClass::getTableSchema();
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return array_keys($schema->columns);
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}
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/**
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* @return bool 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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* @deprecated 2.0.14 Use [[Schema::getServerVersion]] with [[\version_compare()]].
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*/
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protected function isOldMssql()
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{
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return version_compare($this->db->getSchema()->getServerVersion(), '11', '<');
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}
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/**
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* {@inheritdoc}
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* @since 2.0.8
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*/
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public function selectExists($rawSql)
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{
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return 'SELECT CASE WHEN EXISTS(' . $rawSql . ') THEN 1 ELSE 0 END';
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}
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/**
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* Normalizes data to be saved into the table, performing extra preparations and type converting, if necessary.
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* @param string $table the table that data will be saved into.
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* @param array $columns the column data (name => value) to be saved into the table.
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* @return array normalized columns
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*/
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private function normalizeTableRowData($table, $columns, &$params)
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{
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if (($tableSchema = $this->db->getSchema()->getTableSchema($table)) !== null) {
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$columnSchemas = $tableSchema->columns;
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foreach ($columns as $name => $value) {
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// @see https://github.com/yiisoft/yii2/issues/12599
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if (isset($columnSchemas[$name]) && $columnSchemas[$name]->type === Schema::TYPE_BINARY && $columnSchemas[$name]->dbType === 'varbinary' && (is_string($value) || $value === null)) {
|
|
$phName = $this->bindParam($value, $params);
|
|
// @see https://github.com/yiisoft/yii2/issues/12599
|
|
$columns[$name] = new Expression("CONVERT(VARBINARY(MAX), $phName)", $params);
|
|
}
|
|
}
|
|
}
|
|
|
|
return $columns;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
* Added OUTPUT construction for getting inserted data (for SQL Server 2005 or later)
|
|
* OUTPUT clause - The OUTPUT clause is new to SQL Server 2005 and has the ability to access
|
|
* the INSERTED and DELETED tables as is the case with a trigger.
|
|
*/
|
|
public function insert($table, $columns, &$params)
|
|
{
|
|
$columns = $this->normalizeTableRowData($table, $columns, $params);
|
|
|
|
$version2005orLater = version_compare($this->db->getSchema()->getServerVersion(), '9', '>=');
|
|
|
|
list($names, $placeholders, $values, $params) = $this->prepareInsertValues($table, $columns, $params);
|
|
$cols = [];
|
|
$outputColumns = [];
|
|
if ($version2005orLater) {
|
|
/* @var $schema TableSchema */
|
|
$schema = $this->db->getTableSchema($table);
|
|
foreach ($schema->columns as $column) {
|
|
if ($column->isComputed) {
|
|
continue;
|
|
}
|
|
|
|
$dbType = $column->dbType;
|
|
if (in_array($dbType, ['char', 'varchar', 'nchar', 'nvarchar', 'binary', 'varbinary'])) {
|
|
$dbType .= '(MAX)';
|
|
}
|
|
if ($column->dbType === Schema::TYPE_TIMESTAMP) {
|
|
$dbType = $column->allowNull ? 'varbinary(8)' : 'binary(8)';
|
|
}
|
|
|
|
$quoteColumnName = $this->db->quoteColumnName($column->name);
|
|
$cols[] = $quoteColumnName . ' ' . $dbType . ' ' . ($column->allowNull ? "NULL" : "");
|
|
$outputColumns[] = 'INSERTED.' . $quoteColumnName;
|
|
}
|
|
}
|
|
|
|
$countColumns = count($outputColumns);
|
|
|
|
$sql = 'INSERT INTO ' . $this->db->quoteTableName($table)
|
|
. (!empty($names) ? ' (' . implode(', ', $names) . ')' : '')
|
|
. (($version2005orLater && $countColumns) ? ' OUTPUT ' . implode(',', $outputColumns) . ' INTO @temporary_inserted' : '')
|
|
. (!empty($placeholders) ? ' VALUES (' . implode(', ', $placeholders) . ')' : $values);
|
|
|
|
if ($version2005orLater && $countColumns) {
|
|
$sql = 'SET NOCOUNT ON;DECLARE @temporary_inserted TABLE (' . implode(', ', $cols) . ');' . $sql .
|
|
';SELECT * FROM @temporary_inserted';
|
|
}
|
|
|
|
return $sql;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
* @see https://docs.microsoft.com/en-us/sql/t-sql/statements/merge-transact-sql
|
|
* @see https://weblogs.sqlteam.com/dang/2009/01/31/upsert-race-condition-with-merge/
|
|
*/
|
|
public function upsert($table, $insertColumns, $updateColumns, &$params)
|
|
{
|
|
$insertColumns = $this->normalizeTableRowData($table, $insertColumns, $params);
|
|
|
|
/** @var Constraint[] $constraints */
|
|
list($uniqueNames, $insertNames, $updateNames) = $this->prepareUpsertColumns($table, $insertColumns, $updateColumns, $constraints);
|
|
if (empty($uniqueNames)) {
|
|
return $this->insert($table, $insertColumns, $params);
|
|
}
|
|
if ($updateNames === []) {
|
|
// there are no columns to update
|
|
$updateColumns = false;
|
|
}
|
|
|
|
$onCondition = ['or'];
|
|
$quotedTableName = $this->db->quoteTableName($table);
|
|
foreach ($constraints as $constraint) {
|
|
$constraintCondition = ['and'];
|
|
foreach ($constraint->columnNames as $name) {
|
|
$quotedName = $this->db->quoteColumnName($name);
|
|
$constraintCondition[] = "$quotedTableName.$quotedName=[EXCLUDED].$quotedName";
|
|
}
|
|
$onCondition[] = $constraintCondition;
|
|
}
|
|
$on = $this->buildCondition($onCondition, $params);
|
|
list(, $placeholders, $values, $params) = $this->prepareInsertValues($table, $insertColumns, $params);
|
|
|
|
/**
|
|
* Fix number of select query params for old MSSQL version that does not support offset correctly.
|
|
* @see QueryBuilder::oldBuildOrderByAndLimit
|
|
*/
|
|
$insertNamesUsing = $insertNames;
|
|
if (strstr($values, 'rowNum = ROW_NUMBER()') !== false) {
|
|
$insertNamesUsing = array_merge(['[rowNum]'], $insertNames);
|
|
}
|
|
|
|
$mergeSql = 'MERGE ' . $this->db->quoteTableName($table) . ' WITH (HOLDLOCK) '
|
|
. 'USING (' . (!empty($placeholders) ? 'VALUES (' . implode(', ', $placeholders) . ')' : ltrim($values, ' ')) . ') AS [EXCLUDED] (' . implode(', ', $insertNamesUsing) . ') '
|
|
. "ON ($on)";
|
|
$insertValues = [];
|
|
foreach ($insertNames as $name) {
|
|
$quotedName = $this->db->quoteColumnName($name);
|
|
if (strrpos($quotedName, '.') === false) {
|
|
$quotedName = '[EXCLUDED].' . $quotedName;
|
|
}
|
|
$insertValues[] = $quotedName;
|
|
}
|
|
$insertSql = 'INSERT (' . implode(', ', $insertNames) . ')'
|
|
. ' VALUES (' . implode(', ', $insertValues) . ')';
|
|
if ($updateColumns === false) {
|
|
return "$mergeSql WHEN NOT MATCHED THEN $insertSql;";
|
|
}
|
|
|
|
if ($updateColumns === true) {
|
|
$updateColumns = [];
|
|
foreach ($updateNames as $name) {
|
|
$quotedName = $this->db->quoteColumnName($name);
|
|
if (strrpos($quotedName, '.') === false) {
|
|
$quotedName = '[EXCLUDED].' . $quotedName;
|
|
}
|
|
$updateColumns[$name] = new Expression($quotedName);
|
|
}
|
|
}
|
|
$updateColumns = $this->normalizeTableRowData($table, $updateColumns, $params);
|
|
|
|
list($updates, $params) = $this->prepareUpdateSets($table, $updateColumns, $params);
|
|
$updateSql = 'UPDATE SET ' . implode(', ', $updates);
|
|
return "$mergeSql WHEN MATCHED THEN $updateSql WHEN NOT MATCHED THEN $insertSql;";
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function update($table, $columns, $condition, &$params)
|
|
{
|
|
return parent::update($table, $this->normalizeTableRowData($table, $columns, $params), $condition, $params);
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function getColumnType($type)
|
|
{
|
|
$columnType = parent::getColumnType($type);
|
|
// remove unsupported keywords
|
|
$columnType = preg_replace("/\s*comment '.*'/i", '', $columnType);
|
|
$columnType = preg_replace('/ first$/i', '', $columnType);
|
|
|
|
return $columnType;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
protected function extractAlias($table)
|
|
{
|
|
if (preg_match('/^\[.*\]$/', $table)) {
|
|
return false;
|
|
}
|
|
|
|
return parent::extractAlias($table);
|
|
}
|
|
|
|
/**
|
|
* Builds a SQL statement for dropping constraints for column of table.
|
|
*
|
|
* @param string $table the table whose constraint is to be dropped. The name will be properly quoted by the method.
|
|
* @param string $column the column whose constraint is to be dropped. The name will be properly quoted by the method.
|
|
* @param string $type type of constraint, leave empty for all type of constraints(for example: D - default, 'UQ' - unique, 'C' - check)
|
|
* @see https://docs.microsoft.com/sql/relational-databases/system-catalog-views/sys-objects-transact-sql
|
|
* @return string the DROP CONSTRAINTS SQL
|
|
*/
|
|
private function dropConstraintsForColumn($table, $column, $type='')
|
|
{
|
|
return "DECLARE @tableName VARCHAR(MAX) = '" . $this->db->quoteTableName($table) . "'
|
|
DECLARE @columnName VARCHAR(MAX) = '{$column}'
|
|
|
|
WHILE 1=1 BEGIN
|
|
DECLARE @constraintName NVARCHAR(128)
|
|
SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
|
|
FROM (
|
|
SELECT sc.[constid] object_id
|
|
FROM [sys].[sysconstraints] sc
|
|
JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
|
|
WHERE sc.[id] = OBJECT_ID(@tableName)
|
|
UNION
|
|
SELECT object_id(i.[name]) FROM [sys].[indexes] i
|
|
JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
|
|
JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
|
|
WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
|
|
) cons
|
|
JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
|
|
" . (!empty($type) ? " WHERE so.[type]='{$type}'" : "") . ")
|
|
IF @constraintName IS NULL BREAK
|
|
EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
|
|
END";
|
|
}
|
|
|
|
/**
|
|
* Drop all constraints before column delete
|
|
* {@inheritdoc}
|
|
*/
|
|
public function dropColumn($table, $column)
|
|
{
|
|
return $this->dropConstraintsForColumn($table, $column) . "\nALTER TABLE " . $this->db->quoteTableName($table)
|
|
. " DROP COLUMN " . $this->db->quoteColumnName($column);
|
|
}
|
|
}
|