rexastore.lua

Rexastore is redis-based graph queries engine, inspired by hexastore and written in Lua.

I'm not a Lua guru, so it have some bad code inside.

Usage

redis> EVALSHA SHA1 2 key command ...args

Put new item

Put new item into graph: put SUBJECT PREDICATE OBJECT

redis> EVALSHA SHA1 2 graph put Alice friend Bob
redis> EVALSHA SHA1 2 graph put Alice friend Carol
redis> EVALSHA SHA1 2 graph put Bob friend Dan
redis> EVALSHA SHA1 2 graph put Carol friend Alice

Get item

Get linked items: get SUBJECT [PREDICATE [OBJECT]]

redis> EVALSHA SHA1 2 graph get Alice friend
1) 1) "Alice"
   2) "friend"
   3) "Bob"
2) 1) "Alice"
   2) "friend"
   3) "Carol"

Search items

Search is very simple: query "Carol:friend:>A" "<A:friend:>B" "<B".

There is special syntax for links walking, eg. >A and <A, where A can be any string. >A means "save all values to A", <A means "iterate over all values from A and get them".

For example — get all friends of friends of Carol:

redis> EVALSHA SHA1 2 graph query "Carol:friend:>A" "<A:friend:>B" "<B"
1) "Bob"
2) "Carol"

Delete item

It simlar to put: delete SUBJECT PREDICATE OBJECT or del SUBJECT PREDICATE OBJECT.

Clear graph store

Just drop it:

redis> EVALSHA SHA1 2 graph drop