BDB::Sequence¶ ↑

A sequence is created with BDB::Common::create_sequence or BDB::Common::open_sequence (only with db >= 4.3)

class BDB::Common¶ ↑

create_sequence(key, init = nil, options = {}) {|sequence| }

create a new sequence (see also open_sequence)

equivalent to +open_sequence(key, BDB::CREATE|BDB::EXCL, init, options)+

return (or yield) an object BDB::Sequence

open_sequence(key, flags = 0, init = nil, options = {}) {|sequence| }

create or open a sequence (see BDB::Sequence)

key : key for the sequence

flags : flags can have BDB::CREATE, BDB::EXCL, BDB::AUTO_COMMIT, BDB::THREAD

init : initial value for the sequence

options : hash with the possible keys “set_cachesize”, “set_flags” and “set_range”

return (or yield) an object BDB::Sequence

Methods¶ ↑

cachesize

return the current cache size

close

close the sequence

db

return the bdb file associated with the sequence

flags

return the current flags

get(delta = 1, flags = 0)

return the next available element in the sequence and changes the sequence value by delta

flags can have the value BDB::AUTO_COMMIT, BDB::TXN_NOSYNC

key

return the key associated with the sequence

range

return the range of values in the sequence

remove(flags = 0)

remove the sequence

flags can have the value BDB::AUTO_COMMIT, BDB::TXN_NOSYNC

stat(flags = 0)

return statistics about the sequence

flags can have the value BDB::STAT_CLEAR