void BuildSql(string field_type, MemberNode memberNode, ValueNode valueNode, ExpressionType op)
{
if(valueNode.Value == null)
{
ResolveNullValue(memberNode, op);
}
else
{
_builder.QueryByField(field_type/*memberNode.TableName*/, memberNode.TableName, memberNode.FieldName, _operationDictionary[op], valueNode.Value);
}
}
void BuildSql(ValueNode valueNode, MemberNode memberNode, ExpressionType op)
{
BuildSql(memberNode, valueNode, op);
}