htsql / src / htsql_oracle / core / tr /

# Copyright (c) 2006-2013, Prometheus Research, LLC

from htsql.core.adapter import adapt
from htsql.core.domain import TextDomain
from import LiteralCode
from import Rewrite

class OracleRewriteLiteral(Rewrite):


    def __call__(self):
        if isinstance(self.code.domain, TextDomain) and self.code.value == "":
            return self.code.clone(value=None)
        return self.code
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