Doctrine\DBAL\Platforms\SQLServerPlatform::getAlterTableSQL PHP Метод

    public function getAlterTableSQL(TableDiff $diff)
    {
        $queryParts = array();
        $sql = array();
        $columnSql = array();
        $commentsSql = array();
        /** @var \Doctrine\DBAL\Schema\Column $column */
        foreach ($diff->addedColumns as $column) {
            if ($this->onSchemaAlterTableAddColumn($column, $diff, $columnSql)) {
                continue;
            }
            $columnDef = $column->toArray();
            $queryParts[] = 'ADD ' . $this->getColumnDeclarationSQL($column->getQuotedName($this), $columnDef);
            if (isset($columnDef['default'])) {
                $queryParts[] = $this->getAlterTableAddDefaultConstraintClause($diff->name, $column);
            }
            $comment = $this->getColumnComment($column);
            if (!empty($comment) || is_numeric($comment)) {
                $commentsSql[] = $this->getCreateColumnCommentSQL($diff->name, $column->getQuotedName($this), $comment);
            }
        }
        foreach ($diff->removedColumns as $column) {
            if ($this->onSchemaAlterTableRemoveColumn($column, $diff, $columnSql)) {
                continue;
            }
            $queryParts[] = 'DROP COLUMN ' . $column->getQuotedName($this);
        }
        /* @var $columnDiff \Doctrine\DBAL\Schema\ColumnDiff */
        foreach ($diff->changedColumns as $columnDiff) {
            if ($this->onSchemaAlterTableChangeColumn($columnDiff, $diff, $columnSql)) {
                continue;
            }
            $column = $columnDiff->column;
            $comment = $this->getColumnComment($column);
            $hasComment = !empty($comment) || is_numeric($comment);
            if ($columnDiff->fromColumn instanceof Column) {
                $fromComment = $this->getColumnComment($columnDiff->fromColumn);
                $hasFromComment = !empty($fromComment) || is_numeric($fromComment);
                if ($hasFromComment && $hasComment && $fromComment != $comment) {
                    $commentsSql[] = $this->getAlterColumnCommentSQL($diff->name, $column->getQuotedName($this), $comment);
                } elseif ($hasFromComment && !$hasComment) {
                    $commentsSql[] = $this->getDropColumnCommentSQL($diff->name, $column->getQuotedName($this));
                } elseif ($hasComment) {
                    $commentsSql[] = $this->getCreateColumnCommentSQL($diff->name, $column->getQuotedName($this), $comment);
                }
            } else {
                // todo: Original comment cannot be determined. What to do? Add, update, drop or skip?
            }
            // Do not add query part if only comment has changed.
            if ($columnDiff->hasChanged('comment') && count($columnDiff->changedProperties) === 1) {
                continue;
            }
            $requireDropDefaultConstraint = $this->alterColumnRequiresDropDefaultConstraint($columnDiff);
            if ($requireDropDefaultConstraint) {
                $queryParts[] = $this->getAlterTableDropDefaultConstraintClause($diff->name, $columnDiff->oldColumnName);
            }
            $columnDef = $column->toArray();
            $queryParts[] = 'ALTER COLUMN ' . $this->getColumnDeclarationSQL($column->getQuotedName($this), $columnDef);
            if (isset($columnDef['default']) && ($requireDropDefaultConstraint || $columnDiff->hasChanged('default'))) {
                $queryParts[] = $this->getAlterTableAddDefaultConstraintClause($diff->name, $column);
            }
        }
        foreach ($diff->renamedColumns as $oldColumnName => $column) {
            if ($this->onSchemaAlterTableRenameColumn($oldColumnName, $column, $diff, $columnSql)) {
                continue;
            }
            $oldColumnName = new Identifier($oldColumnName);
            $sql[] = "sp_RENAME '" . $diff->getName($this)->getQuotedName($this) . "." . $oldColumnName->getQuotedName($this) . "', '" . $column->getQuotedName($this) . "', 'COLUMN'";
            // Recreate default constraint with new column name if necessary (for future reference).
            if ($column->getDefault() !== null) {
                $queryParts[] = $this->getAlterTableDropDefaultConstraintClause($diff->name, $oldColumnName->getQuotedName($this));
                $queryParts[] = $this->getAlterTableAddDefaultConstraintClause($diff->name, $column);
            }
        }
        $tableSql = array();
        if ($this->onSchemaAlterTable($diff, $tableSql)) {
            return array_merge($tableSql, $columnSql);
        }
        foreach ($queryParts as $query) {
            $sql[] = 'ALTER TABLE ' . $diff->getName($this)->getQuotedName($this) . ' ' . $query;
        }
        $sql = array_merge($sql, $commentsSql);
        if ($diff->newName !== false) {
            $sql[] = "sp_RENAME '" . $diff->getName($this)->getQuotedName($this) . "', '" . $diff->getNewName()->getName() . "'";
            /**
             * Rename table's default constraints names
             * to match the new table name.
             * This is necessary to ensure that the default
             * constraints can be referenced in future table
             * alterations as the table name is encoded in
             * default constraints' names.
             */
            $sql[] = "DECLARE @sql NVARCHAR(MAX) = N''; " . "SELECT @sql += N'EXEC sp_rename N''' + dc.name + ''', N''' " . "+ REPLACE(dc.name, '" . $this->generateIdentifierName($diff->name) . "', " . "'" . $this->generateIdentifierName($diff->newName) . "') + ''', ''OBJECT'';' " . "FROM sys.default_constraints dc " . "JOIN sys.tables tbl ON dc.parent_object_id = tbl.object_id " . "WHERE tbl.name = '" . $diff->getNewName()->getName() . "';" . "EXEC sp_executesql @sql";
        }
        $sql = array_merge($this->getPreAlterTableIndexForeignKeySQL($diff), $sql, $this->getPostAlterTableIndexForeignKeySQL($diff));
        return array_merge($sql, $tableSql, $columnSql);
    }