private string GetCNFOfPredicate(string predicate, DBMSType dbmsType = DBMSType.Unknown, bool ignoreCase = true)
{
var ast = MiniSqlParserAST.CreatePredicate(predicate, dbmsType);
var visitor = new GetCNFVisitor(_tableColumns, ignoreCase);
ast.Accept(visitor);
return(visitor.Print());
}