[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: calcite support bit operation

PS Can you see what support for bit operations is in other databases? It would be quite straightforward to add new functions, less easy to add “&” or “|” or “~”.

> On Jun 9, 2018, at 6:47 PM, Julian Hyde <jhyde@xxxxxxxxxx> wrote:
> BIt operations are not standard SQL.
> Are there any databases that support them? (I’m guessing MySQL, which at one point seemed to have a mission to convert SQL into C, even down to using int instead of boolean.)
> We could perhaps add support for bit operations, but I would not like to add an ‘&’ operator. It would be too disruptive to the parser. Maybe it could go into Babel.
> Julian
>> On Jun 9, 2018, at 5:38 PM, 18390992640 <m18390992640_2@xxxxxxx> wrote:
>> Hello EveryOne !
>>     I have seed calcite SqlKind.java source code, find that it hasn't bit operation.  so I want to ask why calcite don't support bit operation. for example, follow Query statement, it not support.
>>     select col_a, col_b from table_1 where (col_a & col_b) > 10.
>>       if I want to   extend calcite to supoort bit operation, how difficulty may be?
>>        who knwo this, please give me a help.  thanks very mush!