MmapDB.jl

Usage

using MmapDB

# set data folder for storage
MmapDB.Init(homedir()*"/Desktop/test")

mutable struct Something
	# all subtypes should be primitive
	region_id::UInt8
	longitude::Float64
	latitude::Float64
	timestamp::Int64
	end
t = MmapDB.GenerateCode(Something)
# auto generated TableSomething in Main module
# you can also use custom var name for convenience

# create a table for maximum 10000 rows
TableSomething.Create!(10000) # mmap generated
# TableSomething.		# use tab to show all generated methods
# TableSomething.SetRow(id, any_struct_compatible)
# TableSomething.SetFieldTimestamp(id, ...)
# TableSomething.GetRow(id)::Main.Something
# TableSomething.GetFieldTimestamp(id/range/vector)::Int64/Vector{Int64}

# next time directly open db file
TableSomething.Open(false) # using true for persistance, false for read only

Todos

1. Support field index.

2. Support string field.

3. Split date files into multiple.

4. Time sequence optimization. (move to private repo)

5. Consider build a private layer of memory cache, then disable real-time synchronization on disk. (deprecated)