S2GRAPH-123(https://issues.apache.org/jira/browse/S2GRAPH-123) I have
opinion on the directional index feature provided in this issue. The
current implementation creates an 'index edge' according to the 'dir'
column value (in or out) in the 'label_indices' table. The current
implementation chooses the first 'index' in 'indices' when querying without
a proper 'index' name. If the problem is that the query does not give the
proper index name at the time of the query in the one-step query to the out
direction, then the query in the two-step query in the direction of in.
Also, since the existing indexes are changed, 'index_id' is changed for
newly added indexes. Therefore, there is no way to perform migration when
you want to no longer use the index for in direction in the label used
previously. So I suggest changing the implementation as shown below.
'Index' is used for both directions as before, but it changes its behavior
by referring to the value of the 'option' field. { "In": {
"StoreDegree": true, "StoreIndex": false }, "Out": {
"StoreDegree": false, "StoreIndex": true } } If no option
is given for each direction, it assumes that all values are set to
'true'. Thank you.
