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Stefan Miklosovic commented on CASSANDRA-19546: ----------------------------------------------- Yeah suggest something else if you find it more appropriate ... to_human_size or something similar maybe? > Add to_data function > -------------------- > > Key: CASSANDRA-19546 > URL: https://issues.apache.org/jira/browse/CASSANDRA-19546 > Project: Cassandra > Issue Type: New Feature > Components: Legacy/CQL > Reporter: Stefan Miklosovic > Priority: Normal > Time Spent: 10m > Remaining Estimate: 0h > > There are cases (e.g in our system_views tables for might be applicable for > user tables as well) when a column is of a type which represent number of > bytes. However, it is quite hard to parse a value for a human to have some > estimation what that value is. > I propose this: > {code:java} > cqlsh> select * from myks.mytb ; > id | col1 | col2 | col3 | col4 > ----+------+------+------+---------- > 1 | 100 | 200 | 300 | 32432423 > (1 rows) > cqlsh> select to_data(col4) from myks.mytb where id = 1; > system.to_data(col4) > ---------------------- > 30.93 MiB > (1 rows) > cqlsh> select to_data(col4,0) from myks.mytb where id = 1; > system.to_data(col4, 0) > ------------------------- > 31 MiB > (1 rows) > cqlsh> select to_data(col4,1) from myks.mytb where id = 1; > system.to_data(col4, 1) > ------------------------- > 30.9 MiB > (1 rows) > {code} > The second argument is optional and represents the number of decimal places > (at most) to use. Without the second argument, it will default to > FileUtils.df which is "#.##" format. > {code} > cqlsh> DESCRIBE myks.mytb ; > CREATE TABLE myks.mytb ( > id int PRIMARY KEY, > col1 int, > col2 smallint, > col3 bigint, > col4 varint, > ) > {code} > I also propose that this to_data function (name of it might be indeed > discussed and it is just a suggestion) should be only applicable for int, > smallint, bigint and varint types. I am not sure how to apply this to e.g. > "float" or similar. As I mentioned, it is meant to convert just number of > bytes, which is just some number, to a string representation of that and I do > not think that applying that function to anything else but these types makes > sense. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org