maria-discuss team mailing list archive

[Justin Swanhart <greenlion@xxxxxxxxx>]

Yes, \0 is ascii zero, but it must be converting the string \0 to the int.
It doesn't do any escape conversion, which is kind of idiotic. :D

I don't know what the LOAD DATA delimiter parser will do with a null
character in the input.  It might fail.

--Justin

On Mon, Nov 2, 2015 at 7:39 PM, Roberto Spadim <roberto@xxxxxxxxxxxxx>
wrote:

> character ascii 0 ?
> \0 \1 b'0' b'1' 0 1
> don't work
>
> i will test binary data
>
> 2015-11-03 0:26 GMT-02:00 Justin Swanhart <greenlion@xxxxxxxxx>:
>
>> Try \0 and 1  if you have only one bit to set.
>>
>> On Mon, Nov 2, 2015 at 5:56 PM, Roberto Spadim <roberto@xxxxxxxxxxxxx>
>> wrote:
>>
>>> maybe
>>> enum_field_types type() const { return MYSQL_TYPE_BIT; }
>>> if(field->type()==MYSQL_TYPE_BIT){
>>> // convert string to unsigned long long
>>> }else{
>>> // use normal field->store()
>>> }
>>>
>>> must try, but i didn't found how to store() with the "b'0'"
>>> representation or someting like it
>>>
>>> 2015-11-02 22:45 GMT-02:00 Roberto Spadim <roberto@xxxxxxxxxxxxx>:
>>>
>>>> maybe check if it's a BIT type at sql_load.cc and cast to bigint
>>>> unsigned before field->store ? i think it's the easier patch, i don't know
>>>> i tryed any kind of file
>>>> the bit column only with with "SET bit_column=@some_variable+0" or
>>>> anything to cast from "string" to "integers"
>>>>
>>>> 2015-11-02 22:40 GMT-02:00 Roberto Spadim <roberto@xxxxxxxxxxxxx>:
>>>>
>>>>> probably something here:
>>>>> https://github.com/MariaDB/server/blob/10.1/sql/field.cc#L9127
>>>>>
>>>>> 2015-11-02 22:28 GMT-02:00 Roberto Spadim <roberto@xxxxxxxxxxxxx>:
>>>>>
>>>>>> hi justing, but i always get 1
>>>>>> even when data file have "0" (character "0") at line
>>>>>>
>>>>>> i'm reading the load data file:
>>>>>>
>>>>>> https://github.com/MariaDB/server/blob/e19a6f3dca7509eb8e042796a9311dba937ad9d7/sql/sql_load.cc#L853
>>>>>> that's something with field->store (i think)
>>>>>> field->store((char*) pos,length,read_info.read_charset);
>>>>>>
>>>>>> https://github.com/MariaDB/server/blob/e19a6f3dca7509eb8e042796a9311dba937ad9d7/sql/sql_load.cc#L1025
>>>>>> field->store((char*) pos, length, read_info.read_charset);i didn't
>>>>>> checked yet store of bit field type
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> 2015-11-02 22:15 GMT-02:00 Justin Swanhart <greenlion@xxxxxxxxx>:
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> Instead of using b'...' notation, use bitwise math to get the
>>>>>>> integer representation of the bitset, and place that in your loader file.
>>>>>>>
>>>>>>> For example:
>>>>>>> select 1 | 2 | 8;  ---> 11
>>>>>>>
>>>>>>> Put 11 in your data file and you will get bits 1 2 and 8 set in your
>>>>>>> bitset.
>>>>>>>
>>>>>>> --Justin
>>>>>>>
>>>>>>> On Mon, Nov 2, 2015 at 4:52 PM, Roberto Spadim <
>>>>>>> roberto@xxxxxxxxxxxxx> wrote:
>>>>>>>
>>>>>>>> sorry found at mysql docs
>>>>>>>>
>>>>>>>> BIT <https://dev.mysql.com/doc/refman/5.7/en/bit-type.html> values
>>>>>>>> cannot be loaded using binary notation (for example, b'011010').
>>>>>>>> To work around this, specify the values as regular integers and use the
>>>>>>>> SET clause to convert them so that MySQL performs a numeric type
>>>>>>>> conversion and loads them into the BIT
>>>>>>>> <https://dev.mysql.com/doc/refman/5.7/en/bit-type.html> column
>>>>>>>> properly:
>>>>>>>>
>>>>>>>>  <https://dev.mysql.com/doc/refman/5.7/en/load-data.html>
>>>>>>>> shell> *cat /tmp/bit_test.txt*
>>>>>>>> 2
>>>>>>>> 127
>>>>>>>> shell> *mysql test*
>>>>>>>> mysql> *LOAD DATA INFILE '/tmp/bit_test.txt'*
>>>>>>>>     -> *INTO TABLE bit_test (@var1) SET b = CAST(@var1 AS UNSIGNED);*
>>>>>>>> Query OK, 2 rows affected (0.00 sec)
>>>>>>>> Records: 2  Deleted: 0  Skipped: 0  Warnings: 0
>>>>>>>>
>>>>>>>>
>>>>>>>> but i'm checking something very bad
>>>>>>>> if i execute without "SET" a big file take 1second, with "SET" it
>>>>>>>> takes 3 times more
>>>>>>>> maybe we could include the bit cast at load data infile and solve
>>>>>>>> this problem? maybe a mariadb improvement?
>>>>>>>>
>>>>>>>>
>>>>>>>> 2015-11-02 21:43 GMT-02:00 Roberto Spadim <roberto@xxxxxxxxxxxxx>:
>>>>>>>>
>>>>>>>>> hi guys, how could i send bit data to mysql with LOAD FILE?
>>>>>>>>>
>>>>>>>>> a table example:
>>>>>>>>> create table t (i bit not null default 0);
>>>>>>>>>
>>>>>>>>> LOAD DATA LOCAL INFILE "file.csv" IGNORE INTO TABLE `t` FIELDS
>>>>>>>>> TERMINATED BY ';' LINES TERMINATED BY '\n' (i)
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> the data file is simple:
>>>>>>>>>
>>>>>>>>> 0
>>>>>>>>> 1
>>>>>>>>> 0
>>>>>>>>> 1
>>>>>>>>> 0
>>>>>>>>> 1
>>>>>>>>>
>>>>>>>>> but i got Warning 1024: Out of range value for column 'i' at row 1
>>>>>>>>> ... to last row
>>>>>>>>>
>>>>>>>>> any idea? i tried
>>>>>>>>> b'0'
>>>>>>>>> b'1'
>>>>>>>>> '0'
>>>>>>>>> '1'
>>>>>>>>> 0
>>>>>>>>> 1
>>>>>>>>> but no one work, i don't know what happen but it's cast always to
>>>>>>>>> 1  (maybe convert from string to binary?)
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Roberto Spadim
>>>>>>>> SPAEmpresarial - Software ERP
>>>>>>>> Eng. Automação e Controle
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Mailing list: https://launchpad.net/~maria-discuss
>>>>>>>> Post to     : maria-discuss@xxxxxxxxxxxxxxxxxxx
>>>>>>>> Unsubscribe : https://launchpad.net/~maria-discuss
>>>>>>>> More help   : https://help.launchpad.net/ListHelp
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Roberto Spadim
>>>>>> SPAEmpresarial - Software ERP
>>>>>> Eng. Automação e Controle
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Roberto Spadim
>>>>> SPAEmpresarial - Software ERP
>>>>> Eng. Automação e Controle
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Roberto Spadim
>>>> SPAEmpresarial - Software ERP
>>>> Eng. Automação e Controle
>>>>
>>>
>>>
>>>
>>> --
>>> Roberto Spadim
>>> SPAEmpresarial - Software ERP
>>> Eng. Automação e Controle
>>>
>>
>>
>
>
> --
> Roberto Spadim
> SPAEmpresarial - Software ERP
> Eng. Automação e Controle
>