I want to fetch binary data encoded the string in record instead of file size string. Currently in Odoo record has a binary field with value was size string in JSON response.
Attached the screenshot of the record field value
I want to binary encoded string.
Related
I am trying to write a Python data frame to redshift. I wrote this code -
df.to_sql(sheetname, con=conn,if_exists='replace',chunksize=250, index=False)
conn.autocommit = True
I am getting below error:
DataError: (psycopg2.errors.StringDataRightTruncation) value too long for type character varying(256)
I have 300+ columns and 1080 rows.
The error messages looks to be from Redshift and is indicating that one of the values you are attempting to insert into the table is too large for the definition of that column.
"value too long for type character varying(256)"
The column is defined to be VARCHAR(256) but the value being inserted is larger than this. You should be able to inspect the length of the strings you are inserting (in your python code) to find the offending value(s). Alternatively you can look at the statement history in Redshift to find the offending command.
One thing to note is that Redshift uses UTF-8 to encode data and for some characters it needs to use a multi-byte encoding. These encodings can take more than one byte to represent certain characters. The defined length of the column is in bytes, not characters, so a string that has 250 characters can take more than 256 bytes to represent it if there are more than a handful of multi-byte characters in the string. If you are on the hairy edge of not fitting in the defined column length you may want to check your string lengths in bytes with a multi-byte UTF-8 encoding.
I converted a .gif file to base64 string, and now I want to cut this string in order to represent only one frame of the gif. How do I do this? There is some character used as frame separator? Or some resolution calculation?
I have more than 100 cpp files. I need to assign unique ID to each of them. I aslo need to know which file it is based on their ID. I found the maximum length of file's name contains 64 characters and the ID can only be at most 8 bytes long. Is there any algorithm can help to assign unique ID to source file in VS2013 in C++ and can also let user know which file it is based on the ID ?
Just store a mapping between filename and an integer.
-----Yes, this way is very simple. But every time when people create new course files, the mapping need to be re-coded. So I won't use this way.
HERE IS THE ORIGINAL QUESTION SO THAT THE COMMENTS BELOW MAKE SENSE
Now I have a bunch of strings, like "AAA", or "ABBCCHH". The maximum of string contains 64 characters. Now I need an algorithm which can convert string into numbers( not must be integer, double float is also acceptable). But the length of numbers must be fixed. For example, if "A" is convert into 12312, 5 digits, "ABBHGGH" should also have 5 digits after converted. And these numbers can also be converted back to original strings. Is there any algorithms can do that ? The converted number cannot over 8 bytes. That's why I cannot just use ASCII etc simple algorithm. I don't know which algorithm can do that.
To generate unique IDs of an arbitrary set of filenames (the actual question here), you could use a cryptographic hash (SHA-1, -256, -384, -512). This will result in a unique, fixed-length hexadecimal output. If you can't allow the characters a-f in the output, you can convert the hexadecimal value to decimal.
This process is not reversible, but you can maintain a map (lookup table) of the input values to the IDs.
If you want a simpler solution, just hexadecimal encode the filenames. This is reversible. (You can add the hex -> decimal conversion here if necessary as well).
I have an Excel file which I need to convert to text file. Now the thing is that for each value there is a specified field size which should be there in text file. For example:
if my Excel contains a character of size 10 with value ABCDEF, then in text file it should be as ABCDEF____ (4 spaces).
After this next value is appended in similar manner with its rest of the size is left blank.
Any kind of hint or pointer will be really helpful on how to procede with this.
Assuming your string is in A1, and its length isn't more than the 10 characters:
=A1&REPT(" ",10-LEN(A1))
on Sybase, I have a table containing a binary column.
Using convert(varchar(16384), convert(binary(16384), T1.TEXT)) as Text I can convert the data contained in to a string format.
Now there is my question: I need to select a string from this field as a new string containing specific words. How can I do it?
Let me take an example.
If I Suppose in one row the field contains the string "Output of this activity are txt files: the file orange.txt, the file black.txt and eventually the file red.txt", in output of my query I want the field as "orange.txt, black.txt, red.txt".
Is it possible to do it?
Thanks
You can't do this. This is because neither the BINARY nor the TEXT datatypes under Sybase allow sub-string searching or regular expression processing.
When you are storing character data, VARCHAR or UNIVARCHAR are always the better options. TEXT as a type should only ever be used if your TEXT fields are larger than your Sybase configured page size.