maria-discuss team mailing list archive

[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
>>>>>>
>>>>>> _______________________________________________
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>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> 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
>