@build_sniff_from_prefix
class SQL(Text):
    """Class describing an html file"""
    file_ext = "sql"

    def set_peek(self, dataset, is_multi_byte=False):
        if not dataset.dataset.purged:
            dataset.peek = "SQL file"
            dataset.blurb = nice_size(dataset.get_size())
        else:
            dataset.peek = "file does not exist"
            dataset.blurb = "file purged from disk"

    def get_mime(self):
        """Returns the mime type of the datatype"""
        return "application/sql"

    def sniff_prefix(self, file_prefix):
        """
        Uses some patterns usualy encountered in sql files to guess
        it's type
        """
        start = file_prefix.string_io().read(42).strip()
        return any(
            header in start
            for header in (
                "CREATE DATABASE",
                "INSERT INTO",
                "CREATE TABLE",
                "BEGIN TRANSACTION"
            )
        )