← Back to team overview

maria-discuss team mailing list archive

Re: LOAD FILE and BIT datatype

 

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

Follow ups

References